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<?php
/*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This software consists of voluntary contributions made by many individuals
* and is licensed under the MIT license. For more information, see
* <http://www.doctrine-project.org>.
*/
namespace Doctrine\ORM\Query;
use Doctrine\ORM\Mapping\ClassMetadata;
use Doctrine\ORM\Query;
use Doctrine\ORM\Query\AST\Functions;
/**
* An LL(*) recursive-descent parser for the context-free grammar of the Doctrine Query Language.
* Parses a DQL query, reports any errors in it, and generates an AST.
*
* @since 2.0
* @author Guilherme Blanco <guilhermeblanco@hotmail.com>
* @author Jonathan Wage <jonwage@gmail.com>
* @author Roman Borschel <roman@code-factory.org>
* @author Janne Vanhala <jpvanhal@cc.hut.fi>
* @author Fabio B. Silva <fabio.bat.silva@gmail.com>
*/
class Parser
{
/**
* READ-ONLY: Maps BUILT-IN string function names to AST class names.
*
* @var array
*/
private static $_STRING_FUNCTIONS = [
'concat' => Functions\ConcatFunction::class,
'substring' => Functions\SubstringFunction::class,
'trim' => Functions\TrimFunction::class,
'lower' => Functions\LowerFunction::class,
'upper' => Functions\UpperFunction::class,
'identity' => Functions\IdentityFunction::class,
];
/**
* READ-ONLY: Maps BUILT-IN numeric function names to AST class names.
*
* @var array
*/
private static $_NUMERIC_FUNCTIONS = [
'length' => Functions\LengthFunction::class,
'locate' => Functions\LocateFunction::class,
'abs' => Functions\AbsFunction::class,
'sqrt' => Functions\SqrtFunction::class,
'mod' => Functions\ModFunction::class,
'size' => Functions\SizeFunction::class,
'date_diff' => Functions\DateDiffFunction::class,
'bit_and' => Functions\BitAndFunction::class,
'bit_or' => Functions\BitOrFunction::class,
// Aggregate functions
'min' => Functions\MinFunction::class,
'max' => Functions\MaxFunction::class,
'avg' => Functions\AvgFunction::class,
'sum' => Functions\SumFunction::class,
'count' => Functions\CountFunction::class,
];
/**
* READ-ONLY: Maps BUILT-IN datetime function names to AST class names.
*
* @var array
*/
private static $_DATETIME_FUNCTIONS = [
'current_date' => Functions\CurrentDateFunction::class,
'current_time' => Functions\CurrentTimeFunction::class,
'current_timestamp' => Functions\CurrentTimestampFunction::class,
'date_add' => Functions\DateAddFunction::class,
'date_sub' => Functions\DateSubFunction::class,
];
/*
* Expressions that were encountered during parsing of identifiers and expressions
* and still need to be validated.
*/
/**
* @var array
*/
private $deferredIdentificationVariables = [];
/**
* @var array
*/
private $deferredPartialObjectExpressions = [];
/**
* @var array
*/
private $deferredPathExpressions = [];
/**
* @var array
*/
private $deferredResultVariables = [];
/**
* @var array
*/
private $deferredNewObjectExpressions = [];
/**
* The lexer.
*
* @var \Doctrine\ORM\Query\Lexer
*/
private $lexer;
/**
* The parser result.
*
* @var \Doctrine\ORM\Query\ParserResult
*/
private $parserResult;
/**
* The EntityManager.
*
* @var \Doctrine\ORM\EntityManager
*/
private $em;
/**
* The Query to parse.
*
* @var Query
*/
private $query;
/**
* Map of declared query components in the parsed query.
*
* @var array
*/
private $queryComponents = [];
/**
* Keeps the nesting level of defined ResultVariables.
*
* @var integer
*/
private $nestingLevel = 0;
/**
* Any additional custom tree walkers that modify the AST.
*
* @var array
*/
private $customTreeWalkers = [];
/**
* The custom last tree walker, if any, that is responsible for producing the output.
*
* @var TreeWalker
*/
private $customOutputWalker;
/**
* @var array
*/
private $identVariableExpressions = [];
/**
* Creates a new query parser object.
*
* @param Query $query The Query to parse.
*/
public function __construct(Query $query)
{
$this->query = $query;
$this->em = $query->getEntityManager();
$this->lexer = new Lexer($query->getDQL());
$this->parserResult = new ParserResult();
}
/**
* Sets a custom tree walker that produces output.
* This tree walker will be run last over the AST, after any other walkers.
*
* @param string $className
*
* @return void
*/
public function setCustomOutputTreeWalker($className)
{
$this->customOutputWalker = $className;
}
/**
* Adds a custom tree walker for modifying the AST.
*
* @param string $className
*
* @return void
*/
public function addCustomTreeWalker($className)
{
$this->customTreeWalkers[] = $className;
}
/**
* Gets the lexer used by the parser.
*
* @return \Doctrine\ORM\Query\Lexer
*/
public function getLexer()
{
return $this->lexer;
}
/**
* Gets the ParserResult that is being filled with information during parsing.
*
* @return \Doctrine\ORM\Query\ParserResult
*/
public function getParserResult()
{
return $this->parserResult;
}
/**
* Gets the EntityManager used by the parser.
*
* @return \Doctrine\ORM\EntityManager
*/
public function getEntityManager()
{
return $this->em;
}
/**
* Parses and builds AST for the given Query.
*
* @return \Doctrine\ORM\Query\AST\SelectStatement |
* \Doctrine\ORM\Query\AST\UpdateStatement |
* \Doctrine\ORM\Query\AST\DeleteStatement
*/
public function getAST()
{
// Parse & build AST
$AST = $this->QueryLanguage();
// Process any deferred validations of some nodes in the AST.
// This also allows post-processing of the AST for modification purposes.
$this->processDeferredIdentificationVariables();
if ($this->deferredPartialObjectExpressions) {
$this->processDeferredPartialObjectExpressions();
}
if ($this->deferredPathExpressions) {
$this->processDeferredPathExpressions();
}
if ($this->deferredResultVariables) {
$this->processDeferredResultVariables();
}
if ($this->deferredNewObjectExpressions) {
$this->processDeferredNewObjectExpressions($AST);
}
$this->processRootEntityAliasSelected();
// TODO: Is there a way to remove this? It may impact the mixed hydration resultset a lot!
$this->fixIdentificationVariableOrder($AST);
return $AST;
}
/**
* Attempts to match the given token with the current lookahead token.
*
* If they match, updates the lookahead token; otherwise raises a syntax
* error.
*
* @param int $token The token type.
*
* @return void
*
* @throws QueryException If the tokens don't match.
*/
public function match($token)
{
$lookaheadType = $this->lexer->lookahead['type'];
// Short-circuit on first condition, usually types match
if ($lookaheadType !== $token) {
// If parameter is not identifier (1-99) must be exact match
if ($token < Lexer::T_IDENTIFIER) {
$this->syntaxError($this->lexer->getLiteral($token));
}
// If parameter is keyword (200+) must be exact match
if ($token > Lexer::T_IDENTIFIER) {
$this->syntaxError($this->lexer->getLiteral($token));
}
// If parameter is T_IDENTIFIER, then matches T_IDENTIFIER (100) and keywords (200+)
if ($token === Lexer::T_IDENTIFIER && $lookaheadType < Lexer::T_IDENTIFIER) {
$this->syntaxError($this->lexer->getLiteral($token));
}
}
$this->lexer->moveNext();
}
/**
* Frees this parser, enabling it to be reused.
*
* @param boolean $deep Whether to clean peek and reset errors.
* @param integer $position Position to reset.
*
* @return void
*/
public function free($deep = false, $position = 0)
{
// WARNING! Use this method with care. It resets the scanner!
$this->lexer->resetPosition($position);
// Deep = true cleans peek and also any previously defined errors
if ($deep) {
$this->lexer->resetPeek();
}
$this->lexer->token = null;
$this->lexer->lookahead = null;
}
/**
* Parses a query string.
*
* @return ParserResult
*/
public function parse()
{
$AST = $this->getAST();
if (($customWalkers = $this->query->getHint(Query::HINT_CUSTOM_TREE_WALKERS)) !== false) {
$this->customTreeWalkers = $customWalkers;
}
if (($customOutputWalker = $this->query->getHint(Query::HINT_CUSTOM_OUTPUT_WALKER)) !== false) {
$this->customOutputWalker = $customOutputWalker;
}
// Run any custom tree walkers over the AST
if ($this->customTreeWalkers) {
$treeWalkerChain = new TreeWalkerChain($this->query, $this->parserResult, $this->queryComponents);
foreach ($this->customTreeWalkers as $walker) {
$treeWalkerChain->addTreeWalker($walker);
}
switch (true) {
case ($AST instanceof AST\UpdateStatement):
$treeWalkerChain->walkUpdateStatement($AST);
break;
case ($AST instanceof AST\DeleteStatement):
$treeWalkerChain->walkDeleteStatement($AST);
break;
case ($AST instanceof AST\SelectStatement):
default:
$treeWalkerChain->walkSelectStatement($AST);
}
$this->queryComponents = $treeWalkerChain->getQueryComponents();
}
$outputWalkerClass = $this->customOutputWalker ?: SqlWalker::class;
$outputWalker = new $outputWalkerClass($this->query, $this->parserResult, $this->queryComponents);
// Assign an SQL executor to the parser result
$this->parserResult->setSqlExecutor($outputWalker->getExecutor($AST));
return $this->parserResult;
}
/**
* Fixes order of identification variables.
*
* They have to appear in the select clause in the same order as the
* declarations (from ... x join ... y join ... z ...) appear in the query
* as the hydration process relies on that order for proper operation.
*
* @param AST\SelectStatement|AST\DeleteStatement|AST\UpdateStatement $AST
*
* @return void
*/
private function fixIdentificationVariableOrder($AST)
{
if (count($this->identVariableExpressions) <= 1) {
return;
}
foreach ($this->queryComponents as $dqlAlias => $qComp) {
if ( ! isset($this->identVariableExpressions[$dqlAlias])) {
continue;
}
$expr = $this->identVariableExpressions[$dqlAlias];
$key = array_search($expr, $AST->selectClause->selectExpressions);
unset($AST->selectClause->selectExpressions[$key]);
$AST->selectClause->selectExpressions[] = $expr;
}
}
/**
* Generates a new syntax error.
*
* @param string $expected Expected string.
* @param array|null $token Got token.
*
* @return void
*
* @throws \Doctrine\ORM\Query\QueryException
*/
public function syntaxError($expected = '', $token = null)
{
if ($token === null) {
$token = $this->lexer->lookahead;
}
$tokenPos = (isset($token['position'])) ? $token['position'] : '-1';
$message = "line 0, col {$tokenPos}: Error: ";
$message .= ($expected !== '') ? "Expected {$expected}, got " : 'Unexpected ';
$message .= ($this->lexer->lookahead === null) ? 'end of string.' : "'{$token['value']}'";
throw QueryException::syntaxError($message, QueryException::dqlError($this->query->getDQL()));
}
/**
* Generates a new semantical error.
*
* @param string $message Optional message.
* @param array|null $token Optional token.
*
* @return void
*
* @throws \Doctrine\ORM\Query\QueryException
*/
public function semanticalError($message = '', $token = null)
{
if ($token === null) {
$token = $this->lexer->lookahead;
}
// Minimum exposed chars ahead of token
$distance = 12;
// Find a position of a final word to display in error string
$dql = $this->query->getDQL();
$length = strlen($dql);
$pos = $token['position'] + $distance;
$pos = strpos($dql, ' ', ($length > $pos) ? $pos : $length);
$length = ($pos !== false) ? $pos - $token['position'] : $distance;
$tokenPos = (isset($token['position']) && $token['position'] > 0) ? $token['position'] : '-1';
$tokenStr = substr($dql, $token['position'], $length);
// Building informative message
$message = 'line 0, col ' . $tokenPos . " near '" . $tokenStr . "': Error: " . $message;
throw QueryException::semanticalError($message, QueryException::dqlError($this->query->getDQL()));
}
/**
* Peeks beyond the matched closing parenthesis and returns the first token after that one.
*
* @param boolean $resetPeek Reset peek after finding the closing parenthesis.
*
* @return array
*/
private function peekBeyondClosingParenthesis($resetPeek = true)
{
$token = $this->lexer->peek();
$numUnmatched = 1;
while ($numUnmatched > 0 && $token !== null) {
switch ($token['type']) {
case Lexer::T_OPEN_PARENTHESIS:
++$numUnmatched;
break;
case Lexer::T_CLOSE_PARENTHESIS:
--$numUnmatched;
break;
default:
// Do nothing
}
$token = $this->lexer->peek();
}
if ($resetPeek) {
$this->lexer->resetPeek();
}
return $token;
}
/**
* Checks if the given token indicates a mathematical operator.
*
* @param array $token
*
* @return boolean TRUE if the token is a mathematical operator, FALSE otherwise.
*/
private function isMathOperator($token)
{
return in_array($token['type'], [Lexer::T_PLUS, Lexer::T_MINUS, Lexer::T_DIVIDE, Lexer::T_MULTIPLY]);
}
/**
* Checks if the next-next (after lookahead) token starts a function.
*
* @return boolean TRUE if the next-next tokens start a function, FALSE otherwise.
*/
private function isFunction()
{
$lookaheadType = $this->lexer->lookahead['type'];
$peek = $this->lexer->peek();
$this->lexer->resetPeek();
return ($lookaheadType >= Lexer::T_IDENTIFIER && $peek['type'] === Lexer::T_OPEN_PARENTHESIS);
}
/**
* Checks whether the given token type indicates an aggregate function.
*
* @param int $tokenType
*
* @return boolean TRUE if the token type is an aggregate function, FALSE otherwise.
*/
private function isAggregateFunction($tokenType)
{
return in_array($tokenType, [Lexer::T_AVG, Lexer::T_MIN, Lexer::T_MAX, Lexer::T_SUM, Lexer::T_COUNT]);
}
/**
* Checks whether the current lookahead token of the lexer has the type T_ALL, T_ANY or T_SOME.
*
* @return boolean
*/
private function isNextAllAnySome()
{
return in_array($this->lexer->lookahead['type'], [Lexer::T_ALL, Lexer::T_ANY, Lexer::T_SOME]);
}
/**
* Validates that the given <tt>IdentificationVariable</tt> is semantically correct.
* It must exist in query components list.
*
* @return void
*/
private function processDeferredIdentificationVariables()
{
foreach ($this->deferredIdentificationVariables as $deferredItem) {
$identVariable = $deferredItem['expression'];
// Check if IdentificationVariable exists in queryComponents
if ( ! isset($this->queryComponents[$identVariable])) {
$this->semanticalError(
"'$identVariable' is not defined.", $deferredItem['token']
);
}
$qComp = $this->queryComponents[$identVariable];
// Check if queryComponent points to an AbstractSchemaName or a ResultVariable
if ( ! isset($qComp['metadata'])) {
$this->semanticalError(
"'$identVariable' does not point to a Class.", $deferredItem['token']
);
}
// Validate if identification variable nesting level is lower or equal than the current one
if ($qComp['nestingLevel'] > $deferredItem['nestingLevel']) {
$this->semanticalError(
"'$identVariable' is used outside the scope of its declaration.", $deferredItem['token']
);
}
}
}
/**
* Validates that the given <tt>NewObjectExpression</tt>.
*
* @param \Doctrine\ORM\Query\AST\SelectClause $AST
*
* @return void
*/
private function processDeferredNewObjectExpressions($AST)
{
foreach ($this->deferredNewObjectExpressions as $deferredItem) {
$expression = $deferredItem['expression'];
$token = $deferredItem['token'];
$className = $expression->className;
$args = $expression->args;
$fromClassName = isset($AST->fromClause->identificationVariableDeclarations[0]->rangeVariableDeclaration->abstractSchemaName)
? $AST->fromClause->identificationVariableDeclarations[0]->rangeVariableDeclaration->abstractSchemaName
: null;
// If the namespace is not given then assumes the first FROM entity namespace
if (strpos($className, '\\') === false && ! class_exists($className) && strpos($fromClassName, '\\') !== false) {
$namespace = substr($fromClassName, 0, strrpos($fromClassName, '\\'));
$fqcn = $namespace . '\\' . $className;
if (class_exists($fqcn)) {
$expression->className = $fqcn;
$className = $fqcn;
}
}
if ( ! class_exists($className)) {
$this->semanticalError(sprintf('Class "%s" is not defined.', $className), $token);
}
$class = new \ReflectionClass($className);
if ( ! $class->isInstantiable()) {
$this->semanticalError(sprintf('Class "%s" can not be instantiated.', $className), $token);
}
if ($class->getConstructor() === null) {
$this->semanticalError(sprintf('Class "%s" has not a valid constructor.', $className), $token);
}
if ($class->getConstructor()->getNumberOfRequiredParameters() > count($args)) {
$this->semanticalError(sprintf('Number of arguments does not match with "%s" constructor declaration.', $className), $token);
}
}
}
/**
* Validates that the given <tt>PartialObjectExpression</tt> is semantically correct.
* It must exist in query components list.
*
* @return void
*/
private function processDeferredPartialObjectExpressions()
{
foreach ($this->deferredPartialObjectExpressions as $deferredItem) {
$expr = $deferredItem['expression'];
$class = $this->queryComponents[$expr->identificationVariable]['metadata'];
foreach ($expr->partialFieldSet as $field) {
if (isset($class->fieldMappings[$field])) {
continue;
}
if (isset($class->associationMappings[$field]) &&
$class->associationMappings[$field]['isOwningSide'] &&
$class->associationMappings[$field]['type'] & ClassMetadata::TO_ONE) {
continue;
}
$this->semanticalError(
"There is no mapped field named '$field' on class " . $class->name . ".", $deferredItem['token']
);
}
if (array_intersect($class->identifier, $expr->partialFieldSet) != $class->identifier) {
$this->semanticalError(
"The partial field selection of class " . $class->name . " must contain the identifier.",
$deferredItem['token']
);
}
}
}
/**
* Validates that the given <tt>ResultVariable</tt> is semantically correct.
* It must exist in query components list.
*
* @return void
*/
private function processDeferredResultVariables()
{
foreach ($this->deferredResultVariables as $deferredItem) {
$resultVariable = $deferredItem['expression'];
// Check if ResultVariable exists in queryComponents
if ( ! isset($this->queryComponents[$resultVariable])) {
$this->semanticalError(
"'$resultVariable' is not defined.", $deferredItem['token']
);
}
$qComp = $this->queryComponents[$resultVariable];
// Check if queryComponent points to an AbstractSchemaName or a ResultVariable
if ( ! isset($qComp['resultVariable'])) {
$this->semanticalError(
"'$resultVariable' does not point to a ResultVariable.", $deferredItem['token']
);
}
// Validate if identification variable nesting level is lower or equal than the current one
if ($qComp['nestingLevel'] > $deferredItem['nestingLevel']) {
$this->semanticalError(
"'$resultVariable' is used outside the scope of its declaration.", $deferredItem['token']
);
}
}
}
/**
* Validates that the given <tt>PathExpression</tt> is semantically correct for grammar rules:
*
* AssociationPathExpression ::= CollectionValuedPathExpression | SingleValuedAssociationPathExpression
* SingleValuedPathExpression ::= StateFieldPathExpression | SingleValuedAssociationPathExpression
* StateFieldPathExpression ::= IdentificationVariable "." StateField
* SingleValuedAssociationPathExpression ::= IdentificationVariable "." SingleValuedAssociationField
* CollectionValuedPathExpression ::= IdentificationVariable "." CollectionValuedAssociationField
*
* @return void
*/
private function processDeferredPathExpressions()
{
foreach ($this->deferredPathExpressions as $deferredItem) {
$pathExpression = $deferredItem['expression'];
$qComp = $this->queryComponents[$pathExpression->identificationVariable];
$class = $qComp['metadata'];
if (($field = $pathExpression->field) === null) {
$field = $pathExpression->field = $class->identifier[0];
}
// Check if field or association exists
if ( ! isset($class->associationMappings[$field]) && ! isset($class->fieldMappings[$field])) {
$this->semanticalError(
'Class ' . $class->name . ' has no field or association named ' . $field,
$deferredItem['token']
);
}
$fieldType = AST\PathExpression::TYPE_STATE_FIELD;
if (isset($class->associationMappings[$field])) {
$assoc = $class->associationMappings[$field];
$fieldType = ($assoc['type'] & ClassMetadata::TO_ONE)
? AST\PathExpression::TYPE_SINGLE_VALUED_ASSOCIATION
: AST\PathExpression::TYPE_COLLECTION_VALUED_ASSOCIATION;
}
// Validate if PathExpression is one of the expected types
$expectedType = $pathExpression->expectedType;
if ( ! ($expectedType & $fieldType)) {
// We need to recognize which was expected type(s)
$expectedStringTypes = [];
// Validate state field type
if ($expectedType & AST\PathExpression::TYPE_STATE_FIELD) {
$expectedStringTypes[] = 'StateFieldPathExpression';
}
// Validate single valued association (*-to-one)
if ($expectedType & AST\PathExpression::TYPE_SINGLE_VALUED_ASSOCIATION) {
$expectedStringTypes[] = 'SingleValuedAssociationField';
}
// Validate single valued association (*-to-many)
if ($expectedType & AST\PathExpression::TYPE_COLLECTION_VALUED_ASSOCIATION) {
$expectedStringTypes[] = 'CollectionValuedAssociationField';
}
// Build the error message
$semanticalError = 'Invalid PathExpression. ';
$semanticalError .= (count($expectedStringTypes) == 1)
? 'Must be a ' . $expectedStringTypes[0] . '.'
: implode(' or ', $expectedStringTypes) . ' expected.';
$this->semanticalError($semanticalError, $deferredItem['token']);
}
// We need to force the type in PathExpression
$pathExpression->type = $fieldType;
}
}
/**
* @return void
*/
private function processRootEntityAliasSelected()
{
if ( ! count($this->identVariableExpressions)) {
return;
}
foreach ($this->identVariableExpressions as $dqlAlias => $expr) {
if (isset($this->queryComponents[$dqlAlias]) && $this->queryComponents[$dqlAlias]['parent'] === null) {
return;
}
}
$this->semanticalError('Cannot select entity through identification variables without choosing at least one root entity alias.');
}
/**
* QueryLanguage ::= SelectStatement | UpdateStatement | DeleteStatement
*
* @return \Doctrine\ORM\Query\AST\SelectStatement |
* \Doctrine\ORM\Query\AST\UpdateStatement |
* \Doctrine\ORM\Query\AST\DeleteStatement
*/
public function QueryLanguage()
{
$this->lexer->moveNext();
switch ($this->lexer->lookahead['type']) {
case Lexer::T_SELECT:
$statement = $this->SelectStatement();
break;
case Lexer::T_UPDATE:
$statement = $this->UpdateStatement();
break;
case Lexer::T_DELETE:
$statement = $this->DeleteStatement();
break;
default:
$this->syntaxError('SELECT, UPDATE or DELETE');
break;
}
// Check for end of string
if ($this->lexer->lookahead !== null) {
$this->syntaxError('end of string');
}
return $statement;
}
/**
* SelectStatement ::= SelectClause FromClause [WhereClause] [GroupByClause] [HavingClause] [OrderByClause]
*
* @return \Doctrine\ORM\Query\AST\SelectStatement
*/
public function SelectStatement()
{
$selectStatement = new AST\SelectStatement($this->SelectClause(), $this->FromClause());
$selectStatement->whereClause = $this->lexer->isNextToken(Lexer::T_WHERE) ? $this->WhereClause() : null;
$selectStatement->groupByClause = $this->lexer->isNextToken(Lexer::T_GROUP) ? $this->GroupByClause() : null;
$selectStatement->havingClause = $this->lexer->isNextToken(Lexer::T_HAVING) ? $this->HavingClause() : null;
$selectStatement->orderByClause = $this->lexer->isNextToken(Lexer::T_ORDER) ? $this->OrderByClause() : null;
return $selectStatement;
}
/**
* UpdateStatement ::= UpdateClause [WhereClause]
*
* @return \Doctrine\ORM\Query\AST\UpdateStatement
*/
public function UpdateStatement()
{
$updateStatement = new AST\UpdateStatement($this->UpdateClause());
$updateStatement->whereClause = $this->lexer->isNextToken(Lexer::T_WHERE) ? $this->WhereClause() : null;
return $updateStatement;
}
/**
* DeleteStatement ::= DeleteClause [WhereClause]
*
* @return \Doctrine\ORM\Query\AST\DeleteStatement
*/
public function DeleteStatement()
{
$deleteStatement = new AST\DeleteStatement($this->DeleteClause());
$deleteStatement->whereClause = $this->lexer->isNextToken(Lexer::T_WHERE) ? $this->WhereClause() : null;
return $deleteStatement;
}
/**
* IdentificationVariable ::= identifier
*
* @return string
*/
public function IdentificationVariable()
{
$this->match(Lexer::T_IDENTIFIER);
$identVariable = $this->lexer->token['value'];
$this->deferredIdentificationVariables[] = [
'expression' => $identVariable,
'nestingLevel' => $this->nestingLevel,
'token' => $this->lexer->token,
];
return $identVariable;
}
/**
* AliasIdentificationVariable = identifier
*
* @return string
*/
public function AliasIdentificationVariable()
{
$this->match(Lexer::T_IDENTIFIER);
$aliasIdentVariable = $this->lexer->token['value'];
$exists = isset($this->queryComponents[$aliasIdentVariable]);
if ($exists) {
$this->semanticalError("'$aliasIdentVariable' is already defined.", $this->lexer->token);
}
return $aliasIdentVariable;
}
/**
* AbstractSchemaName ::= fully_qualified_name | aliased_name | identifier
*
* @return string
*/
public function AbstractSchemaName()
{
if ($this->lexer->isNextToken(Lexer::T_FULLY_QUALIFIED_NAME)) {
$this->match(Lexer::T_FULLY_QUALIFIED_NAME);
$schemaName = $this->lexer->token['value'];
} else if ($this->lexer->isNextToken(Lexer::T_IDENTIFIER)) {
$this->match(Lexer::T_IDENTIFIER);
$schemaName = $this->lexer->token['value'];
} else {
$this->match(Lexer::T_ALIASED_NAME);
list($namespaceAlias, $simpleClassName) = explode(':', $this->lexer->token['value']);
$schemaName = $this->em->getConfiguration()->getEntityNamespace($namespaceAlias) . '\\' . $simpleClassName;
}
return $schemaName;
}
/**
* Validates an AbstractSchemaName, making sure the class exists.
*
* @param string $schemaName The name to validate.
*
* @throws QueryException if the name does not exist.
*/
private function validateAbstractSchemaName($schemaName)
{
if (! (class_exists($schemaName, true) || interface_exists($schemaName, true))) {
$this->semanticalError("Class '$schemaName' is not defined.", $this->lexer->token);
}
}
/**
* AliasResultVariable ::= identifier
*
* @return string
*/
public function AliasResultVariable()
{
$this->match(Lexer::T_IDENTIFIER);
$resultVariable = $this->lexer->token['value'];
$exists = isset($this->queryComponents[$resultVariable]);
if ($exists) {
$this->semanticalError("'$resultVariable' is already defined.", $this->lexer->token);
}
return $resultVariable;
}
/**
* ResultVariable ::= identifier
*
* @return string
*/
public function ResultVariable()
{
$this->match(Lexer::T_IDENTIFIER);
$resultVariable = $this->lexer->token['value'];
// Defer ResultVariable validation
$this->deferredResultVariables[] = [
'expression' => $resultVariable,
'nestingLevel' => $this->nestingLevel,
'token' => $this->lexer->token,
];
return $resultVariable;
}
/**
* JoinAssociationPathExpression ::= IdentificationVariable "." (CollectionValuedAssociationField | SingleValuedAssociationField)
*
* @return \Doctrine\ORM\Query\AST\JoinAssociationPathExpression
*/
public function JoinAssociationPathExpression()
{
$identVariable = $this->IdentificationVariable();
if ( ! isset($this->queryComponents[$identVariable])) {
$this->semanticalError(
'Identification Variable ' . $identVariable .' used in join path expression but was not defined before.'
);
}
$this->match(Lexer::T_DOT);
$this->match(Lexer::T_IDENTIFIER);
$field = $this->lexer->token['value'];
// Validate association field
$qComp = $this->queryComponents[$identVariable];
$class = $qComp['metadata'];
if ( ! $class->hasAssociation($field)) {
$this->semanticalError('Class ' . $class->name . ' has no association named ' . $field);
}
return new AST\JoinAssociationPathExpression($identVariable, $field);
}
/**
* Parses an arbitrary path expression and defers semantical validation
* based on expected types.
*
* PathExpression ::= IdentificationVariable {"." identifier}*
*
* @param integer $expectedTypes
*
* @return \Doctrine\ORM\Query\AST\PathExpression
*/
public function PathExpression($expectedTypes)
{
$identVariable = $this->IdentificationVariable();
$field = null;
if ($this->lexer->isNextToken(Lexer::T_DOT)) {
$this->match(Lexer::T_DOT);
$this->match(Lexer::T_IDENTIFIER);
$field = $this->lexer->token['value'];
while ($this->lexer->isNextToken(Lexer::T_DOT)) {
$this->match(Lexer::T_DOT);
$this->match(Lexer::T_IDENTIFIER);
$field .= '.'.$this->lexer->token['value'];
}
}
// Creating AST node
$pathExpr = new AST\PathExpression($expectedTypes, $identVariable, $field);
// Defer PathExpression validation if requested to be deferred
$this->deferredPathExpressions[] = [
'expression' => $pathExpr,
'nestingLevel' => $this->nestingLevel,
'token' => $this->lexer->token,
];
return $pathExpr;
}
/**
* AssociationPathExpression ::= CollectionValuedPathExpression | SingleValuedAssociationPathExpression
*
* @return \Doctrine\ORM\Query\AST\PathExpression
*/
public function AssociationPathExpression()
{
return $this->PathExpression(
AST\PathExpression::TYPE_SINGLE_VALUED_ASSOCIATION |
AST\PathExpression::TYPE_COLLECTION_VALUED_ASSOCIATION
);
}
/**
* SingleValuedPathExpression ::= StateFieldPathExpression | SingleValuedAssociationPathExpression
*
* @return \Doctrine\ORM\Query\AST\PathExpression
*/
public function SingleValuedPathExpression()
{
return $this->PathExpression(
AST\PathExpression::TYPE_STATE_FIELD |
AST\PathExpression::TYPE_SINGLE_VALUED_ASSOCIATION
);
}
/**
* StateFieldPathExpression ::= IdentificationVariable "." StateField
*
* @return \Doctrine\ORM\Query\AST\PathExpression
*/
public function StateFieldPathExpression()
{
return $this->PathExpression(AST\PathExpression::TYPE_STATE_FIELD);
}
/**
* SingleValuedAssociationPathExpression ::= IdentificationVariable "." SingleValuedAssociationField
*
* @return \Doctrine\ORM\Query\AST\PathExpression
*/
public function SingleValuedAssociationPathExpression()
{
return $this->PathExpression(AST\PathExpression::TYPE_SINGLE_VALUED_ASSOCIATION);
}
/**
* CollectionValuedPathExpression ::= IdentificationVariable "." CollectionValuedAssociationField
*
* @return \Doctrine\ORM\Query\AST\PathExpression
*/
public function CollectionValuedPathExpression()
{
return $this->PathExpression(AST\PathExpression::TYPE_COLLECTION_VALUED_ASSOCIATION);
}
/**
* SelectClause ::= "SELECT" ["DISTINCT"] SelectExpression {"," SelectExpression}
*
* @return \Doctrine\ORM\Query\AST\SelectClause
*/
public function SelectClause()
{
$isDistinct = false;
$this->match(Lexer::T_SELECT);
// Check for DISTINCT
if ($this->lexer->isNextToken(Lexer::T_DISTINCT)) {
$this->match(Lexer::T_DISTINCT);
$isDistinct = true;
}
// Process SelectExpressions (1..N)
$selectExpressions = [];
$selectExpressions[] = $this->SelectExpression();
while ($this->lexer->isNextToken(Lexer::T_COMMA)) {
$this->match(Lexer::T_COMMA);
$selectExpressions[] = $this->SelectExpression();
}
return new AST\SelectClause($selectExpressions, $isDistinct);
}
/**
* SimpleSelectClause ::= "SELECT" ["DISTINCT"] SimpleSelectExpression
*
* @return \Doctrine\ORM\Query\AST\SimpleSelectClause
*/
public function SimpleSelectClause()
{
$isDistinct = false;
$this->match(Lexer::T_SELECT);
if ($this->lexer->isNextToken(Lexer::T_DISTINCT)) {
$this->match(Lexer::T_DISTINCT);
$isDistinct = true;
}
return new AST\SimpleSelectClause($this->SimpleSelectExpression(), $isDistinct);
}
/**
* UpdateClause ::= "UPDATE" AbstractSchemaName ["AS"] AliasIdentificationVariable "SET" UpdateItem {"," UpdateItem}*
*
* @return \Doctrine\ORM\Query\AST\UpdateClause
*/
public function UpdateClause()
{
$this->match(Lexer::T_UPDATE);
$token = $this->lexer->lookahead;
$abstractSchemaName = $this->AbstractSchemaName();
$this->validateAbstractSchemaName($abstractSchemaName);
if ($this->lexer->isNextToken(Lexer::T_AS)) {
$this->match(Lexer::T_AS);
}
$aliasIdentificationVariable = $this->AliasIdentificationVariable();
$class = $this->em->getClassMetadata($abstractSchemaName);
// Building queryComponent
$queryComponent = [
'metadata' => $class,
'parent' => null,
'relation' => null,
'map' => null,
'nestingLevel' => $this->nestingLevel,
'token' => $token,
];
$this->queryComponents[$aliasIdentificationVariable] = $queryComponent;
$this->match(Lexer::T_SET);
$updateItems = [];
$updateItems[] = $this->UpdateItem();
while ($this->lexer->isNextToken(Lexer::T_COMMA)) {
$this->match(Lexer::T_COMMA);
$updateItems[] = $this->UpdateItem();
}
$updateClause = new AST\UpdateClause($abstractSchemaName, $updateItems);
$updateClause->aliasIdentificationVariable = $aliasIdentificationVariable;
return $updateClause;
}
/**
* DeleteClause ::= "DELETE" ["FROM"] AbstractSchemaName ["AS"] AliasIdentificationVariable
*
* @return \Doctrine\ORM\Query\AST\DeleteClause
*/
public function DeleteClause()
{
$this->match(Lexer::T_DELETE);
if ($this->lexer->isNextToken(Lexer::T_FROM)) {
$this->match(Lexer::T_FROM);
}
$token = $this->lexer->lookahead;
$abstractSchemaName = $this->AbstractSchemaName();
$this->validateAbstractSchemaName($abstractSchemaName);
$deleteClause = new AST\DeleteClause($abstractSchemaName);
if ($this->lexer->isNextToken(Lexer::T_AS)) {
$this->match(Lexer::T_AS);
}
$aliasIdentificationVariable = $this->AliasIdentificationVariable();
$deleteClause->aliasIdentificationVariable = $aliasIdentificationVariable;
$class = $this->em->getClassMetadata($deleteClause->abstractSchemaName);
// Building queryComponent
$queryComponent = [
'metadata' => $class,
'parent' => null,
'relation' => null,
'map' => null,
'nestingLevel' => $this->nestingLevel,
'token' => $token,
];
$this->queryComponents[$aliasIdentificationVariable] = $queryComponent;
return $deleteClause;
}
/**
* FromClause ::= "FROM" IdentificationVariableDeclaration {"," IdentificationVariableDeclaration}*
*
* @return \Doctrine\ORM\Query\AST\FromClause
*/
public function FromClause()
{
$this->match(Lexer::T_FROM);
$identificationVariableDeclarations = [];
$identificationVariableDeclarations[] = $this->IdentificationVariableDeclaration();
while ($this->lexer->isNextToken(Lexer::T_COMMA)) {
$this->match(Lexer::T_COMMA);
$identificationVariableDeclarations[] = $this->IdentificationVariableDeclaration();
}
return new AST\FromClause($identificationVariableDeclarations);
}
/**
* SubselectFromClause ::= "FROM" SubselectIdentificationVariableDeclaration {"," SubselectIdentificationVariableDeclaration}*
*
* @return \Doctrine\ORM\Query\AST\SubselectFromClause
*/
public function SubselectFromClause()
{
$this->match(Lexer::T_FROM);
$identificationVariables = [];
$identificationVariables[] = $this->SubselectIdentificationVariableDeclaration();
while ($this->lexer->isNextToken(Lexer::T_COMMA)) {
$this->match(Lexer::T_COMMA);
$identificationVariables[] = $this->SubselectIdentificationVariableDeclaration();
}
return new AST\SubselectFromClause($identificationVariables);
}
/**
* WhereClause ::= "WHERE" ConditionalExpression
*
* @return \Doctrine\ORM\Query\AST\WhereClause
*/
public function WhereClause()
{
$this->match(Lexer::T_WHERE);
return new AST\WhereClause($this->ConditionalExpression());
}
/**
* HavingClause ::= "HAVING" ConditionalExpression
*
* @return \Doctrine\ORM\Query\AST\HavingClause
*/
public function HavingClause()
{
$this->match(Lexer::T_HAVING);
return new AST\HavingClause($this->ConditionalExpression());
}
/**
* GroupByClause ::= "GROUP" "BY" GroupByItem {"," GroupByItem}*
*
* @return \Doctrine\ORM\Query\AST\GroupByClause
*/
public function GroupByClause()
{
$this->match(Lexer::T_GROUP);
$this->match(Lexer::T_BY);
$groupByItems = [$this->GroupByItem()];
while ($this->lexer->isNextToken(Lexer::T_COMMA)) {
$this->match(Lexer::T_COMMA);
$groupByItems[] = $this->GroupByItem();
}
return new AST\GroupByClause($groupByItems);
}
/**
* OrderByClause ::= "ORDER" "BY" OrderByItem {"," OrderByItem}*
*
* @return \Doctrine\ORM\Query\AST\OrderByClause
*/
public function OrderByClause()
{
$this->match(Lexer::T_ORDER);
$this->match(Lexer::T_BY);
$orderByItems = [];
$orderByItems[] = $this->OrderByItem();
while ($this->lexer->isNextToken(Lexer::T_COMMA)) {
$this->match(Lexer::T_COMMA);
$orderByItems[] = $this->OrderByItem();
}
return new AST\OrderByClause($orderByItems);
}
/**
* Subselect ::= SimpleSelectClause SubselectFromClause [WhereClause] [GroupByClause] [HavingClause] [OrderByClause]
*
* @return \Doctrine\ORM\Query\AST\Subselect
*/
public function Subselect()
{
// Increase query nesting level
$this->nestingLevel++;
$subselect = new AST\Subselect($this->SimpleSelectClause(), $this->SubselectFromClause());
$subselect->whereClause = $this->lexer->isNextToken(Lexer::T_WHERE) ? $this->WhereClause() : null;
$subselect->groupByClause = $this->lexer->isNextToken(Lexer::T_GROUP) ? $this->GroupByClause() : null;
$subselect->havingClause = $this->lexer->isNextToken(Lexer::T_HAVING) ? $this->HavingClause() : null;
$subselect->orderByClause = $this->lexer->isNextToken(Lexer::T_ORDER) ? $this->OrderByClause() : null;
// Decrease query nesting level
$this->nestingLevel--;
return $subselect;
}
/**
* UpdateItem ::= SingleValuedPathExpression "=" NewValue
*
* @return \Doctrine\ORM\Query\AST\UpdateItem
*/
public function UpdateItem()
{
$pathExpr = $this->SingleValuedPathExpression();
$this->match(Lexer::T_EQUALS);
$updateItem = new AST\UpdateItem($pathExpr, $this->NewValue());
return $updateItem;
}
/**
* GroupByItem ::= IdentificationVariable | ResultVariable | SingleValuedPathExpression
*
* @return string | \Doctrine\ORM\Query\AST\PathExpression
*/
public function GroupByItem()
{
// We need to check if we are in a IdentificationVariable or SingleValuedPathExpression
$glimpse = $this->lexer->glimpse();
if ($glimpse['type'] === Lexer::T_DOT) {
return $this->SingleValuedPathExpression();
}
// Still need to decide between IdentificationVariable or ResultVariable
$lookaheadValue = $this->lexer->lookahead['value'];
if ( ! isset($this->queryComponents[$lookaheadValue])) {
$this->semanticalError('Cannot group by undefined identification or result variable.');
}
return (isset($this->queryComponents[$lookaheadValue]['metadata']))
? $this->IdentificationVariable()
: $this->ResultVariable();
}
/**
* OrderByItem ::= (
* SimpleArithmeticExpression | SingleValuedPathExpression |
* ScalarExpression | ResultVariable | FunctionDeclaration
* ) ["ASC" | "DESC"]
*
* @return \Doctrine\ORM\Query\AST\OrderByItem
*/
public function OrderByItem()
{
$this->lexer->peek(); // lookahead => '.'
$this->lexer->peek(); // lookahead => token after '.'
$peek = $this->lexer->peek(); // lookahead => token after the token after the '.'
$this->lexer->resetPeek();
$glimpse = $this->lexer->glimpse();
switch (true) {
case ($this->isFunction()):
$expr = $this->FunctionDeclaration();
break;
case ($this->isMathOperator($peek)):
$expr = $this->SimpleArithmeticExpression();
break;
case ($glimpse['type'] === Lexer::T_DOT):
$expr = $this->SingleValuedPathExpression();
break;
case ($this->lexer->peek() && $this->isMathOperator($this->peekBeyondClosingParenthesis())):
$expr = $this->ScalarExpression();
break;
default:
$expr = $this->ResultVariable();
break;
}
$type = 'ASC';
$item = new AST\OrderByItem($expr);
switch (true) {
case ($this->lexer->isNextToken(Lexer::T_DESC)):
$this->match(Lexer::T_DESC);
$type = 'DESC';
break;
case ($this->lexer->isNextToken(Lexer::T_ASC)):
$this->match(Lexer::T_ASC);
break;
default:
// Do nothing
}
$item->type = $type;
return $item;
}
/**
* NewValue ::= SimpleArithmeticExpression | StringPrimary | DatetimePrimary | BooleanPrimary |
* EnumPrimary | SimpleEntityExpression | "NULL"
*
* NOTE: Since it is not possible to correctly recognize individual types, here is the full
* grammar that needs to be supported:
*
* NewValue ::= SimpleArithmeticExpression | "NULL"
*
* SimpleArithmeticExpression covers all *Primary grammar rules and also SimpleEntityExpression
*
* @return AST\ArithmeticExpression
*/
public function NewValue()
{
if ($this->lexer->isNextToken(Lexer::T_NULL)) {
$this->match(Lexer::T_NULL);
return null;
}
if ($this->lexer->isNextToken(Lexer::T_INPUT_PARAMETER)) {
$this->match(Lexer::T_INPUT_PARAMETER);
return new AST\InputParameter($this->lexer->token['value']);
}
return $this->ArithmeticExpression();
}
/**
* IdentificationVariableDeclaration ::= RangeVariableDeclaration [IndexBy] {Join}*
*
* @return \Doctrine\ORM\Query\AST\IdentificationVariableDeclaration
*/
public function IdentificationVariableDeclaration()
{
$joins = [];
$rangeVariableDeclaration = $this->RangeVariableDeclaration();
$indexBy = $this->lexer->isNextToken(Lexer::T_INDEX)
? $this->IndexBy()
: null;
$rangeVariableDeclaration->isRoot = true;
while (
$this->lexer->isNextToken(Lexer::T_LEFT) ||
$this->lexer->isNextToken(Lexer::T_INNER) ||
$this->lexer->isNextToken(Lexer::T_JOIN)
) {
$joins[] = $this->Join();
}
return new AST\IdentificationVariableDeclaration(
$rangeVariableDeclaration, $indexBy, $joins
);
}
/**
* SubselectIdentificationVariableDeclaration ::= IdentificationVariableDeclaration
*
* {Internal note: WARNING: Solution is harder than a bare implementation.
* Desired EBNF support:
*
* SubselectIdentificationVariableDeclaration ::= IdentificationVariableDeclaration | (AssociationPathExpression ["AS"] AliasIdentificationVariable)
*
* It demands that entire SQL generation to become programmatical. This is
* needed because association based subselect requires "WHERE" conditional
* expressions to be injected, but there is no scope to do that. Only scope
* accessible is "FROM", prohibiting an easy implementation without larger
* changes.}
*
* @return \Doctrine\ORM\Query\AST\SubselectIdentificationVariableDeclaration |
* \Doctrine\ORM\Query\AST\IdentificationVariableDeclaration
*/
public function SubselectIdentificationVariableDeclaration()
{
/*
NOT YET IMPLEMENTED!
$glimpse = $this->lexer->glimpse();
if ($glimpse['type'] == Lexer::T_DOT) {
$associationPathExpression = $this->AssociationPathExpression();
if ($this->lexer->isNextToken(Lexer::T_AS)) {
$this->match(Lexer::T_AS);
}
$aliasIdentificationVariable = $this->AliasIdentificationVariable();
$identificationVariable = $associationPathExpression->identificationVariable;
$field = $associationPathExpression->associationField;
$class = $this->queryComponents[$identificationVariable]['metadata'];
$targetClass = $this->em->getClassMetadata($class->associationMappings[$field]['targetEntity']);
// Building queryComponent
$joinQueryComponent = array(
'metadata' => $targetClass,
'parent' => $identificationVariable,
'relation' => $class->getAssociationMapping($field),
'map' => null,
'nestingLevel' => $this->nestingLevel,
'token' => $this->lexer->lookahead
);
$this->queryComponents[$aliasIdentificationVariable] = $joinQueryComponent;
return new AST\SubselectIdentificationVariableDeclaration(
$associationPathExpression, $aliasIdentificationVariable
);
}
*/
return $this->IdentificationVariableDeclaration();
}
/**
* Join ::= ["LEFT" ["OUTER"] | "INNER"] "JOIN"
* (JoinAssociationDeclaration | RangeVariableDeclaration)
* ["WITH" ConditionalExpression]
*
* @return \Doctrine\ORM\Query\AST\Join
*/
public function Join()
{
// Check Join type
$joinType = AST\Join::JOIN_TYPE_INNER;
switch (true) {
case ($this->lexer->isNextToken(Lexer::T_LEFT)):
$this->match(Lexer::T_LEFT);
$joinType = AST\Join::JOIN_TYPE_LEFT;
// Possible LEFT OUTER join
if ($this->lexer->isNextToken(Lexer::T_OUTER)) {
$this->match(Lexer::T_OUTER);
$joinType = AST\Join::JOIN_TYPE_LEFTOUTER;
}
break;
case ($this->lexer->isNextToken(Lexer::T_INNER)):
$this->match(Lexer::T_INNER);
break;
default:
// Do nothing
}
$this->match(Lexer::T_JOIN);
$next = $this->lexer->glimpse();
$joinDeclaration = ($next['type'] === Lexer::T_DOT) ? $this->JoinAssociationDeclaration() : $this->RangeVariableDeclaration();
$adhocConditions = $this->lexer->isNextToken(Lexer::T_WITH);
$join = new AST\Join($joinType, $joinDeclaration);
// Describe non-root join declaration
if ($joinDeclaration instanceof AST\RangeVariableDeclaration) {
$joinDeclaration->isRoot = false;
}
// Check for ad-hoc Join conditions
if ($adhocConditions) {
$this->match(Lexer::T_WITH);
$join->conditionalExpression = $this->ConditionalExpression();
}
return $join;
}
/**
* RangeVariableDeclaration ::= AbstractSchemaName ["AS"] AliasIdentificationVariable
*
* @return \Doctrine\ORM\Query\AST\RangeVariableDeclaration
*
* @throws QueryException
*/
public function RangeVariableDeclaration()
{
if ($this->lexer->isNextToken(Lexer::T_OPEN_PARENTHESIS) && $this->lexer->glimpse()['type'] === Lexer::T_SELECT) {
$this->semanticalError('Subquery is not supported here', $this->lexer->token);
}
$abstractSchemaName = $this->AbstractSchemaName();
$this->validateAbstractSchemaName($abstractSchemaName);
if ($this->lexer->isNextToken(Lexer::T_AS)) {
$this->match(Lexer::T_AS);
}
$token = $this->lexer->lookahead;
$aliasIdentificationVariable = $this->AliasIdentificationVariable();
$classMetadata = $this->em->getClassMetadata($abstractSchemaName);
// Building queryComponent
$queryComponent = [
'metadata' => $classMetadata,
'parent' => null,
'relation' => null,
'map' => null,
'nestingLevel' => $this->nestingLevel,
'token' => $token
];
$this->queryComponents[$aliasIdentificationVariable] = $queryComponent;
return new AST\RangeVariableDeclaration($abstractSchemaName, $aliasIdentificationVariable);
}
/**
* JoinAssociationDeclaration ::= JoinAssociationPathExpression ["AS"] AliasIdentificationVariable [IndexBy]
*
* @return \Doctrine\ORM\Query\AST\JoinAssociationPathExpression
*/
public function JoinAssociationDeclaration()
{
$joinAssociationPathExpression = $this->JoinAssociationPathExpression();
if ($this->lexer->isNextToken(Lexer::T_AS)) {
$this->match(Lexer::T_AS);
}
$aliasIdentificationVariable = $this->AliasIdentificationVariable();
$indexBy = $this->lexer->isNextToken(Lexer::T_INDEX) ? $this->IndexBy() : null;
$identificationVariable = $joinAssociationPathExpression->identificationVariable;
$field = $joinAssociationPathExpression->associationField;
$class = $this->queryComponents[$identificationVariable]['metadata'];
$targetClass = $this->em->getClassMetadata($class->associationMappings[$field]['targetEntity']);
// Building queryComponent
$joinQueryComponent = [
'metadata' => $targetClass,
'parent' => $joinAssociationPathExpression->identificationVariable,
'relation' => $class->getAssociationMapping($field),
'map' => null,
'nestingLevel' => $this->nestingLevel,
'token' => $this->lexer->lookahead
];
$this->queryComponents[$aliasIdentificationVariable] = $joinQueryComponent;
return new AST\JoinAssociationDeclaration($joinAssociationPathExpression, $aliasIdentificationVariable, $indexBy);
}
/**
* PartialObjectExpression ::= "PARTIAL" IdentificationVariable "." PartialFieldSet
* PartialFieldSet ::= "{" SimpleStateField {"," SimpleStateField}* "}"
*
* @return \Doctrine\ORM\Query\AST\PartialObjectExpression
*/
public function PartialObjectExpression()
{
$this->match(Lexer::T_PARTIAL);
$partialFieldSet = [];
$identificationVariable = $this->IdentificationVariable();
$this->match(Lexer::T_DOT);
$this->match(Lexer::T_OPEN_CURLY_BRACE);
$this->match(Lexer::T_IDENTIFIER);
$field = $this->lexer->token['value'];
// First field in partial expression might be embeddable property
while ($this->lexer->isNextToken(Lexer::T_DOT)) {
$this->match(Lexer::T_DOT);
$this->match(Lexer::T_IDENTIFIER);
$field .= '.'.$this->lexer->token['value'];
}
$partialFieldSet[] = $field;
while ($this->lexer->isNextToken(Lexer::T_COMMA)) {
$this->match(Lexer::T_COMMA);
$this->match(Lexer::T_IDENTIFIER);
$field = $this->lexer->token['value'];
while ($this->lexer->isNextToken(Lexer::T_DOT)) {
$this->match(Lexer::T_DOT);
$this->match(Lexer::T_IDENTIFIER);
$field .= '.'.$this->lexer->token['value'];
}
$partialFieldSet[] = $field;
}
$this->match(Lexer::T_CLOSE_CURLY_BRACE);
$partialObjectExpression = new AST\PartialObjectExpression($identificationVariable, $partialFieldSet);
// Defer PartialObjectExpression validation
$this->deferredPartialObjectExpressions[] = [
'expression' => $partialObjectExpression,
'nestingLevel' => $this->nestingLevel,
'token' => $this->lexer->token,
];
return $partialObjectExpression;
}
/**
* NewObjectExpression ::= "NEW" AbstractSchemaName "(" NewObjectArg {"," NewObjectArg}* ")"
*
* @return \Doctrine\ORM\Query\AST\NewObjectExpression
*/
public function NewObjectExpression()
{
$this->match(Lexer::T_NEW);
$className = $this->AbstractSchemaName(); // note that this is not yet validated
$token = $this->lexer->token;
$this->match(Lexer::T_OPEN_PARENTHESIS);
$args[] = $this->NewObjectArg();
while ($this->lexer->isNextToken(Lexer::T_COMMA)) {
$this->match(Lexer::T_COMMA);
$args[] = $this->NewObjectArg();
}
$this->match(Lexer::T_CLOSE_PARENTHESIS);
$expression = new AST\NewObjectExpression($className, $args);
// Defer NewObjectExpression validation
$this->deferredNewObjectExpressions[] = [
'token' => $token,
'expression' => $expression,
'nestingLevel' => $this->nestingLevel,
];
return $expression;
}
/**
* NewObjectArg ::= ScalarExpression | "(" Subselect ")"
*
* @return mixed
*/
public function NewObjectArg()
{
$token = $this->lexer->lookahead;
$peek = $this->lexer->glimpse();
if ($token['type'] === Lexer::T_OPEN_PARENTHESIS && $peek['type'] === Lexer::T_SELECT) {
$this->match(Lexer::T_OPEN_PARENTHESIS);
$expression = $this->Subselect();
$this->match(Lexer::T_CLOSE_PARENTHESIS);
return $expression;
}
return $this->ScalarExpression();
}
/**
* IndexBy ::= "INDEX" "BY" StateFieldPathExpression
*
* @return \Doctrine\ORM\Query\AST\IndexBy
*/
public function IndexBy()
{
$this->match(Lexer::T_INDEX);
$this->match(Lexer::T_BY);
$pathExpr = $this->StateFieldPathExpression();
// Add the INDEX BY info to the query component
$this->queryComponents[$pathExpr->identificationVariable]['map'] = $pathExpr->field;
return new AST\IndexBy($pathExpr);
}
/**
* ScalarExpression ::= SimpleArithmeticExpression | StringPrimary | DateTimePrimary |
* StateFieldPathExpression | BooleanPrimary | CaseExpression |
* InstanceOfExpression
*
* @return mixed One of the possible expressions or subexpressions.
*/
public function ScalarExpression()
{
$lookahead = $this->lexer->lookahead['type'];
$peek = $this->lexer->glimpse();
switch (true) {
case ($lookahead === Lexer::T_INTEGER):
case ($lookahead === Lexer::T_FLOAT):
// SimpleArithmeticExpression : (- u.value ) or ( + u.value ) or ( - 1 ) or ( + 1 )
case ($lookahead === Lexer::T_MINUS):
case ($lookahead === Lexer::T_PLUS):
return $this->SimpleArithmeticExpression();
case ($lookahead === Lexer::T_STRING):
return $this->StringPrimary();
case ($lookahead === Lexer::T_TRUE):
case ($lookahead === Lexer::T_FALSE):
$this->match($lookahead);
return new AST\Literal(AST\Literal::BOOLEAN, $this->lexer->token['value']);
case ($lookahead === Lexer::T_INPUT_PARAMETER):
switch (true) {
case $this->isMathOperator($peek):
// :param + u.value
return $this->SimpleArithmeticExpression();
default:
return $this->InputParameter();
}
case ($lookahead === Lexer::T_CASE):
case ($lookahead === Lexer::T_COALESCE):
case ($lookahead === Lexer::T_NULLIF):
// Since NULLIF and COALESCE can be identified as a function,
// we need to check these before checking for FunctionDeclaration
return $this->CaseExpression();
case ($lookahead === Lexer::T_OPEN_PARENTHESIS):
return $this->SimpleArithmeticExpression();
// this check must be done before checking for a filed path expression
case ($this->isFunction()):
$this->lexer->peek(); // "("
switch (true) {
case ($this->isMathOperator($this->peekBeyondClosingParenthesis())):
// SUM(u.id) + COUNT(u.id)
return $this->SimpleArithmeticExpression();
default:
// IDENTITY(u)
return $this->FunctionDeclaration();
}
break;
// it is no function, so it must be a field path
case ($lookahead === Lexer::T_IDENTIFIER):
$this->lexer->peek(); // lookahead => '.'
$this->lexer->peek(); // lookahead => token after '.'
$peek = $this->lexer->peek(); // lookahead => token after the token after the '.'
$this->lexer->resetPeek();
if ($this->isMathOperator($peek)) {
return $this->SimpleArithmeticExpression();
}
return $this->StateFieldPathExpression();
default:
$this->syntaxError();
}
}
/**
* CaseExpression ::= GeneralCaseExpression | SimpleCaseExpression | CoalesceExpression | NullifExpression
* GeneralCaseExpression ::= "CASE" WhenClause {WhenClause}* "ELSE" ScalarExpression "END"
* WhenClause ::= "WHEN" ConditionalExpression "THEN" ScalarExpression
* SimpleCaseExpression ::= "CASE" CaseOperand SimpleWhenClause {SimpleWhenClause}* "ELSE" ScalarExpression "END"
* CaseOperand ::= StateFieldPathExpression | TypeDiscriminator
* SimpleWhenClause ::= "WHEN" ScalarExpression "THEN" ScalarExpression
* CoalesceExpression ::= "COALESCE" "(" ScalarExpression {"," ScalarExpression}* ")"
* NullifExpression ::= "NULLIF" "(" ScalarExpression "," ScalarExpression ")"
*
* @return mixed One of the possible expressions or subexpressions.
*/
public function CaseExpression()
{
$lookahead = $this->lexer->lookahead['type'];
switch ($lookahead) {
case Lexer::T_NULLIF:
return $this->NullIfExpression();
case Lexer::T_COALESCE:
return $this->CoalesceExpression();
case Lexer::T_CASE:
$this->lexer->resetPeek();
$peek = $this->lexer->peek();
if ($peek['type'] === Lexer::T_WHEN) {
return $this->GeneralCaseExpression();
}
return $this->SimpleCaseExpression();
default:
// Do nothing
break;
}
$this->syntaxError();
}
/**
* CoalesceExpression ::= "COALESCE" "(" ScalarExpression {"," ScalarExpression}* ")"
*
* @return \Doctrine\ORM\Query\AST\CoalesceExpression
*/
public function CoalesceExpression()
{
$this->match(Lexer::T_COALESCE);
$this->match(Lexer::T_OPEN_PARENTHESIS);
// Process ScalarExpressions (1..N)
$scalarExpressions = [];
$scalarExpressions[] = $this->ScalarExpression();
while ($this->lexer->isNextToken(Lexer::T_COMMA)) {
$this->match(Lexer::T_COMMA);
$scalarExpressions[] = $this->ScalarExpression();
}
$this->match(Lexer::T_CLOSE_PARENTHESIS);
return new AST\CoalesceExpression($scalarExpressions);
}
/**
* NullIfExpression ::= "NULLIF" "(" ScalarExpression "," ScalarExpression ")"
*
* @return \Doctrine\ORM\Query\AST\NullIfExpression
*/
public function NullIfExpression()
{
$this->match(Lexer::T_NULLIF);
$this->match(Lexer::T_OPEN_PARENTHESIS);
$firstExpression = $this->ScalarExpression();
$this->match(Lexer::T_COMMA);
$secondExpression = $this->ScalarExpression();
$this->match(Lexer::T_CLOSE_PARENTHESIS);
return new AST\NullIfExpression($firstExpression, $secondExpression);
}
/**
* GeneralCaseExpression ::= "CASE" WhenClause {WhenClause}* "ELSE" ScalarExpression "END"
*
* @return \Doctrine\ORM\Query\AST\GeneralCaseExpression
*/
public function GeneralCaseExpression()
{
$this->match(Lexer::T_CASE);
// Process WhenClause (1..N)
$whenClauses = [];
do {
$whenClauses[] = $this->WhenClause();
} while ($this->lexer->isNextToken(Lexer::T_WHEN));
$this->match(Lexer::T_ELSE);
$scalarExpression = $this->ScalarExpression();
$this->match(Lexer::T_END);
return new AST\GeneralCaseExpression($whenClauses, $scalarExpression);
}
/**
* SimpleCaseExpression ::= "CASE" CaseOperand SimpleWhenClause {SimpleWhenClause}* "ELSE" ScalarExpression "END"
* CaseOperand ::= StateFieldPathExpression | TypeDiscriminator
*
* @return AST\SimpleCaseExpression
*/
public function SimpleCaseExpression()
{
$this->match(Lexer::T_CASE);
$caseOperand = $this->StateFieldPathExpression();
// Process SimpleWhenClause (1..N)
$simpleWhenClauses = [];
do {
$simpleWhenClauses[] = $this->SimpleWhenClause();
} while ($this->lexer->isNextToken(Lexer::T_WHEN));
$this->match(Lexer::T_ELSE);
$scalarExpression = $this->ScalarExpression();
$this->match(Lexer::T_END);
return new AST\SimpleCaseExpression($caseOperand, $simpleWhenClauses, $scalarExpression);
}
/**
* WhenClause ::= "WHEN" ConditionalExpression "THEN" ScalarExpression
*
* @return \Doctrine\ORM\Query\AST\WhenClause
*/
public function WhenClause()
{
$this->match(Lexer::T_WHEN);
$conditionalExpression = $this->ConditionalExpression();
$this->match(Lexer::T_THEN);
return new AST\WhenClause($conditionalExpression, $this->ScalarExpression());
}
/**
* SimpleWhenClause ::= "WHEN" ScalarExpression "THEN" ScalarExpression
*
* @return \Doctrine\ORM\Query\AST\SimpleWhenClause
*/
public function SimpleWhenClause()
{
$this->match(Lexer::T_WHEN);
$conditionalExpression = $this->ScalarExpression();
$this->match(Lexer::T_THEN);
return new AST\SimpleWhenClause($conditionalExpression, $this->ScalarExpression());
}
/**
* SelectExpression ::= (
* IdentificationVariable | ScalarExpression | AggregateExpression | FunctionDeclaration |
* PartialObjectExpression | "(" Subselect ")" | CaseExpression | NewObjectExpression
* ) [["AS"] ["HIDDEN"] AliasResultVariable]
*
* @return \Doctrine\ORM\Query\AST\SelectExpression
*/
public function SelectExpression()
{
$expression = null;
$identVariable = null;
$peek = $this->lexer->glimpse();
$lookaheadType = $this->lexer->lookahead['type'];
switch (true) {
// ScalarExpression (u.name)
case ($lookaheadType === Lexer::T_IDENTIFIER && $peek['type'] === Lexer::T_DOT):
$expression = $this->ScalarExpression();
break;
// IdentificationVariable (u)
case ($lookaheadType === Lexer::T_IDENTIFIER && $peek['type'] !== Lexer::T_OPEN_PARENTHESIS):
$expression = $identVariable = $this->IdentificationVariable();
break;
// CaseExpression (CASE ... or NULLIF(...) or COALESCE(...))
case ($lookaheadType === Lexer::T_CASE):
case ($lookaheadType === Lexer::T_COALESCE):
case ($lookaheadType === Lexer::T_NULLIF):
$expression = $this->CaseExpression();
break;
// DQL Function (SUM(u.value) or SUM(u.value) + 1)
case ($this->isFunction()):
$this->lexer->peek(); // "("
switch (true) {
case ($this->isMathOperator($this->peekBeyondClosingParenthesis())):
// SUM(u.id) + COUNT(u.id)
$expression = $this->ScalarExpression();
break;
default:
// IDENTITY(u)
$expression = $this->FunctionDeclaration();
break;
}
break;
// PartialObjectExpression (PARTIAL u.{id, name})
case ($lookaheadType === Lexer::T_PARTIAL):
$expression = $this->PartialObjectExpression();
$identVariable = $expression->identificationVariable;
break;
// Subselect
case ($lookaheadType === Lexer::T_OPEN_PARENTHESIS && $peek['type'] === Lexer::T_SELECT):
$this->match(Lexer::T_OPEN_PARENTHESIS);
$expression = $this->Subselect();
$this->match(Lexer::T_CLOSE_PARENTHESIS);
break;
// Shortcut: ScalarExpression => SimpleArithmeticExpression
case ($lookaheadType === Lexer::T_OPEN_PARENTHESIS):
case ($lookaheadType === Lexer::T_INTEGER):
case ($lookaheadType === Lexer::T_STRING):
case ($lookaheadType === Lexer::T_FLOAT):
// SimpleArithmeticExpression : (- u.value ) or ( + u.value )
case ($lookaheadType === Lexer::T_MINUS):
case ($lookaheadType === Lexer::T_PLUS):
$expression = $this->SimpleArithmeticExpression();
break;
// NewObjectExpression (New ClassName(id, name))
case ($lookaheadType === Lexer::T_NEW):
$expression = $this->NewObjectExpression();
break;
default:
$this->syntaxError(
'IdentificationVariable | ScalarExpression | AggregateExpression | FunctionDeclaration | PartialObjectExpression | "(" Subselect ")" | CaseExpression',
$this->lexer->lookahead
);
}
// [["AS"] ["HIDDEN"] AliasResultVariable]
$mustHaveAliasResultVariable = false;
if ($this->lexer->isNextToken(Lexer::T_AS)) {
$this->match(Lexer::T_AS);
$mustHaveAliasResultVariable = true;
}
$hiddenAliasResultVariable = false;
if ($this->lexer->isNextToken(Lexer::T_HIDDEN)) {
$this->match(Lexer::T_HIDDEN);
$hiddenAliasResultVariable = true;
}
$aliasResultVariable = null;
if ($mustHaveAliasResultVariable || $this->lexer->isNextToken(Lexer::T_IDENTIFIER)) {
$token = $this->lexer->lookahead;
$aliasResultVariable = $this->AliasResultVariable();
// Include AliasResultVariable in query components.
$this->queryComponents[$aliasResultVariable] = [
'resultVariable' => $expression,
'nestingLevel' => $this->nestingLevel,
'token' => $token,
];
}
// AST
$expr = new AST\SelectExpression($expression, $aliasResultVariable, $hiddenAliasResultVariable);
if ($identVariable) {
$this->identVariableExpressions[$identVariable] = $expr;
}
return $expr;
}
/**
* SimpleSelectExpression ::= (
* StateFieldPathExpression | IdentificationVariable | FunctionDeclaration |
* AggregateExpression | "(" Subselect ")" | ScalarExpression
* ) [["AS"] AliasResultVariable]
*
* @return \Doctrine\ORM\Query\AST\SimpleSelectExpression
*/
public function SimpleSelectExpression()
{
$peek = $this->lexer->glimpse();
switch ($this->lexer->lookahead['type']) {
case Lexer::T_IDENTIFIER:
switch (true) {
case ($peek['type'] === Lexer::T_DOT):
$expression = $this->StateFieldPathExpression();
return new AST\SimpleSelectExpression($expression);
case ($peek['type'] !== Lexer::T_OPEN_PARENTHESIS):
$expression = $this->IdentificationVariable();
return new AST\SimpleSelectExpression($expression);
case ($this->isFunction()):
// SUM(u.id) + COUNT(u.id)
if ($this->isMathOperator($this->peekBeyondClosingParenthesis())) {
return new AST\SimpleSelectExpression($this->ScalarExpression());
}
// COUNT(u.id)
if ($this->isAggregateFunction($this->lexer->lookahead['type'])) {
return new AST\SimpleSelectExpression($this->AggregateExpression());
}
// IDENTITY(u)
return new AST\SimpleSelectExpression($this->FunctionDeclaration());
default:
// Do nothing
}
break;
case Lexer::T_OPEN_PARENTHESIS:
if ($peek['type'] !== Lexer::T_SELECT) {
// Shortcut: ScalarExpression => SimpleArithmeticExpression
$expression = $this->SimpleArithmeticExpression();
return new AST\SimpleSelectExpression($expression);
}
// Subselect
$this->match(Lexer::T_OPEN_PARENTHESIS);
$expression = $this->Subselect();
$this->match(Lexer::T_CLOSE_PARENTHESIS);
return new AST\SimpleSelectExpression($expression);
default:
// Do nothing
}
$this->lexer->peek();
$expression = $this->ScalarExpression();
$expr = new AST\SimpleSelectExpression($expression);
if ($this->lexer->isNextToken(Lexer::T_AS)) {
$this->match(Lexer::T_AS);
}
if ($this->lexer->isNextToken(Lexer::T_IDENTIFIER)) {
$token = $this->lexer->lookahead;
$resultVariable = $this->AliasResultVariable();
$expr->fieldIdentificationVariable = $resultVariable;
// Include AliasResultVariable in query components.
$this->queryComponents[$resultVariable] = [
'resultvariable' => $expr,
'nestingLevel' => $this->nestingLevel,
'token' => $token,
];
}
return $expr;
}
/**
* ConditionalExpression ::= ConditionalTerm {"OR" ConditionalTerm}*
*
* @return \Doctrine\ORM\Query\AST\ConditionalExpression
*/
public function ConditionalExpression()
{
$conditionalTerms = [];
$conditionalTerms[] = $this->ConditionalTerm();
while ($this->lexer->isNextToken(Lexer::T_OR)) {
$this->match(Lexer::T_OR);
$conditionalTerms[] = $this->ConditionalTerm();
}
// Phase 1 AST optimization: Prevent AST\ConditionalExpression
// if only one AST\ConditionalTerm is defined
if (count($conditionalTerms) == 1) {
return $conditionalTerms[0];
}
return new AST\ConditionalExpression($conditionalTerms);
}
/**
* ConditionalTerm ::= ConditionalFactor {"AND" ConditionalFactor}*
*
* @return \Doctrine\ORM\Query\AST\ConditionalTerm
*/
public function ConditionalTerm()
{
$conditionalFactors = [];
$conditionalFactors[] = $this->ConditionalFactor();
while ($this->lexer->isNextToken(Lexer::T_AND)) {
$this->match(Lexer::T_AND);
$conditionalFactors[] = $this->ConditionalFactor();
}
// Phase 1 AST optimization: Prevent AST\ConditionalTerm
// if only one AST\ConditionalFactor is defined
if (count($conditionalFactors) == 1) {
return $conditionalFactors[0];
}
return new AST\ConditionalTerm($conditionalFactors);
}
/**
* ConditionalFactor ::= ["NOT"] ConditionalPrimary
*
* @return \Doctrine\ORM\Query\AST\ConditionalFactor
*/
public function ConditionalFactor()
{
$not = false;
if ($this->lexer->isNextToken(Lexer::T_NOT)) {
$this->match(Lexer::T_NOT);
$not = true;
}
$conditionalPrimary = $this->ConditionalPrimary();
// Phase 1 AST optimization: Prevent AST\ConditionalFactor
// if only one AST\ConditionalPrimary is defined
if ( ! $not) {
return $conditionalPrimary;
}
$conditionalFactor = new AST\ConditionalFactor($conditionalPrimary);
$conditionalFactor->not = $not;
return $conditionalFactor;
}
/**
* ConditionalPrimary ::= SimpleConditionalExpression | "(" ConditionalExpression ")"
*
* @return \Doctrine\ORM\Query\AST\ConditionalPrimary
*/
public function ConditionalPrimary()
{
$condPrimary = new AST\ConditionalPrimary;
if ( ! $this->lexer->isNextToken(Lexer::T_OPEN_PARENTHESIS)) {
$condPrimary->simpleConditionalExpression = $this->SimpleConditionalExpression();
return $condPrimary;
}
// Peek beyond the matching closing parenthesis ')'
$peek = $this->peekBeyondClosingParenthesis();
if (in_array($peek['value'], ["=", "<", "<=", "<>", ">", ">=", "!="]) ||
in_array($peek['type'], [Lexer::T_NOT, Lexer::T_BETWEEN, Lexer::T_LIKE, Lexer::T_IN, Lexer::T_IS, Lexer::T_EXISTS]) ||
$this->isMathOperator($peek)) {
$condPrimary->simpleConditionalExpression = $this->SimpleConditionalExpression();
return $condPrimary;
}
$this->match(Lexer::T_OPEN_PARENTHESIS);
$condPrimary->conditionalExpression = $this->ConditionalExpression();
$this->match(Lexer::T_CLOSE_PARENTHESIS);
return $condPrimary;
}
/**
* SimpleConditionalExpression ::=
* ComparisonExpression | BetweenExpression | LikeExpression |
* InExpression | NullComparisonExpression | ExistsExpression |
* EmptyCollectionComparisonExpression | CollectionMemberExpression |
* InstanceOfExpression
*/
public function SimpleConditionalExpression()
{
if ($this->lexer->isNextToken(Lexer::T_EXISTS)) {
return $this->ExistsExpression();
}
$token = $this->lexer->lookahead;
$peek = $this->lexer->glimpse();
$lookahead = $token;
if ($this->lexer->isNextToken(Lexer::T_NOT)) {
$token = $this->lexer->glimpse();
}
if ($token['type'] === Lexer::T_IDENTIFIER || $token['type'] === Lexer::T_INPUT_PARAMETER || $this->isFunction()) {
// Peek beyond the matching closing parenthesis.
$beyond = $this->lexer->peek();
switch ($peek['value']) {
case '(':
// Peeks beyond the matched closing parenthesis.
$token = $this->peekBeyondClosingParenthesis(false);
if ($token['type'] === Lexer::T_NOT) {
$token = $this->lexer->peek();
}
if ($token['type'] === Lexer::T_IS) {
$lookahead = $this->lexer->peek();
}
break;
default:
// Peek beyond the PathExpression or InputParameter.
$token = $beyond;
while ($token['value'] === '.') {
$this->lexer->peek();
$token = $this->lexer->peek();
}
// Also peek beyond a NOT if there is one.
if ($token['type'] === Lexer::T_NOT) {
$token = $this->lexer->peek();
}
// We need to go even further in case of IS (differentiate between NULL and EMPTY)
$lookahead = $this->lexer->peek();
}
// Also peek beyond a NOT if there is one.
if ($lookahead['type'] === Lexer::T_NOT) {
$lookahead = $this->lexer->peek();
}
$this->lexer->resetPeek();
}
if ($token['type'] === Lexer::T_BETWEEN) {
return $this->BetweenExpression();
}
if ($token['type'] === Lexer::T_LIKE) {
return $this->LikeExpression();
}
if ($token['type'] === Lexer::T_IN) {
return $this->InExpression();
}
if ($token['type'] === Lexer::T_INSTANCE) {
return $this->InstanceOfExpression();
}
if ($token['type'] === Lexer::T_MEMBER) {
return $this->CollectionMemberExpression();
}
if ($token['type'] === Lexer::T_IS && $lookahead['type'] === Lexer::T_NULL) {
return $this->NullComparisonExpression();
}
if ($token['type'] === Lexer::T_IS && $lookahead['type'] === Lexer::T_EMPTY) {
return $this->EmptyCollectionComparisonExpression();
}
return $this->ComparisonExpression();
}
/**
* EmptyCollectionComparisonExpression ::= CollectionValuedPathExpression "IS" ["NOT"] "EMPTY"
*
* @return \Doctrine\ORM\Query\AST\EmptyCollectionComparisonExpression
*/
public function EmptyCollectionComparisonExpression()
{
$emptyCollectionCompExpr = new AST\EmptyCollectionComparisonExpression(
$this->CollectionValuedPathExpression()
);
$this->match(Lexer::T_IS);
if ($this->lexer->isNextToken(Lexer::T_NOT)) {
$this->match(Lexer::T_NOT);
$emptyCollectionCompExpr->not = true;
}
$this->match(Lexer::T_EMPTY);
return $emptyCollectionCompExpr;
}
/**
* CollectionMemberExpression ::= EntityExpression ["NOT"] "MEMBER" ["OF"] CollectionValuedPathExpression
*
* EntityExpression ::= SingleValuedAssociationPathExpression | SimpleEntityExpression
* SimpleEntityExpression ::= IdentificationVariable | InputParameter
*
* @return \Doctrine\ORM\Query\AST\CollectionMemberExpression
*/
public function CollectionMemberExpression()
{
$not = false;
$entityExpr = $this->EntityExpression();
if ($this->lexer->isNextToken(Lexer::T_NOT)) {
$this->match(Lexer::T_NOT);
$not = true;
}
$this->match(Lexer::T_MEMBER);
if ($this->lexer->isNextToken(Lexer::T_OF)) {
$this->match(Lexer::T_OF);
}
$collMemberExpr = new AST\CollectionMemberExpression(
$entityExpr, $this->CollectionValuedPathExpression()
);
$collMemberExpr->not = $not;
return $collMemberExpr;
}
/**
* Literal ::= string | char | integer | float | boolean
*
* @return \Doctrine\ORM\Query\AST\Literal
*/
public function Literal()
{
switch ($this->lexer->lookahead['type']) {
case Lexer::T_STRING:
$this->match(Lexer::T_STRING);
return new AST\Literal(AST\Literal::STRING, $this->lexer->token['value']);
case Lexer::T_INTEGER:
case Lexer::T_FLOAT:
$this->match(
$this->lexer->isNextToken(Lexer::T_INTEGER) ? Lexer::T_INTEGER : Lexer::T_FLOAT
);
return new AST\Literal(AST\Literal::NUMERIC, $this->lexer->token['value']);
case Lexer::T_TRUE:
case Lexer::T_FALSE:
$this->match(
$this->lexer->isNextToken(Lexer::T_TRUE) ? Lexer::T_TRUE : Lexer::T_FALSE
);
return new AST\Literal(AST\Literal::BOOLEAN, $this->lexer->token['value']);
default:
$this->syntaxError('Literal');
}
}
/**
* InParameter ::= Literal | InputParameter
*
* @return string | \Doctrine\ORM\Query\AST\InputParameter
*/
public function InParameter()
{
if ($this->lexer->lookahead['type'] == Lexer::T_INPUT_PARAMETER) {
return $this->InputParameter();
}
return $this->Literal();
}
/**
* InputParameter ::= PositionalParameter | NamedParameter
*
* @return \Doctrine\ORM\Query\AST\InputParameter
*/
public function InputParameter()
{
$this->match(Lexer::T_INPUT_PARAMETER);
return new AST\InputParameter($this->lexer->token['value']);
}
/**
* ArithmeticExpression ::= SimpleArithmeticExpression | "(" Subselect ")"
*
* @return \Doctrine\ORM\Query\AST\ArithmeticExpression
*/
public function ArithmeticExpression()
{
$expr = new AST\ArithmeticExpression;
if ($this->lexer->isNextToken(Lexer::T_OPEN_PARENTHESIS)) {
$peek = $this->lexer->glimpse();
if ($peek['type'] === Lexer::T_SELECT) {
$this->match(Lexer::T_OPEN_PARENTHESIS);
$expr->subselect = $this->Subselect();
$this->match(Lexer::T_CLOSE_PARENTHESIS);
return $expr;
}
}
$expr->simpleArithmeticExpression = $this->SimpleArithmeticExpression();
return $expr;
}
/**
* SimpleArithmeticExpression ::= ArithmeticTerm {("+" | "-") ArithmeticTerm}*
*
* @return \Doctrine\ORM\Query\AST\SimpleArithmeticExpression
*/
public function SimpleArithmeticExpression()
{
$terms = [];
$terms[] = $this->ArithmeticTerm();
while (($isPlus = $this->lexer->isNextToken(Lexer::T_PLUS)) || $this->lexer->isNextToken(Lexer::T_MINUS)) {
$this->match(($isPlus) ? Lexer::T_PLUS : Lexer::T_MINUS);
$terms[] = $this->lexer->token['value'];
$terms[] = $this->ArithmeticTerm();
}
// Phase 1 AST optimization: Prevent AST\SimpleArithmeticExpression
// if only one AST\ArithmeticTerm is defined
if (count($terms) == 1) {
return $terms[0];
}
return new AST\SimpleArithmeticExpression($terms);
}
/**
* ArithmeticTerm ::= ArithmeticFactor {("*" | "/") ArithmeticFactor}*
*
* @return \Doctrine\ORM\Query\AST\ArithmeticTerm
*/
public function ArithmeticTerm()
{
$factors = [];
$factors[] = $this->ArithmeticFactor();
while (($isMult = $this->lexer->isNextToken(Lexer::T_MULTIPLY)) || $this->lexer->isNextToken(Lexer::T_DIVIDE)) {
$this->match(($isMult) ? Lexer::T_MULTIPLY : Lexer::T_DIVIDE);
$factors[] = $this->lexer->token['value'];
$factors[] = $this->ArithmeticFactor();
}
// Phase 1 AST optimization: Prevent AST\ArithmeticTerm
// if only one AST\ArithmeticFactor is defined
if (count($factors) == 1) {
return $factors[0];
}
return new AST\ArithmeticTerm($factors);
}
/**
* ArithmeticFactor ::= [("+" | "-")] ArithmeticPrimary
*
* @return \Doctrine\ORM\Query\AST\ArithmeticFactor
*/
public function ArithmeticFactor()
{
$sign = null;
if (($isPlus = $this->lexer->isNextToken(Lexer::T_PLUS)) || $this->lexer->isNextToken(Lexer::T_MINUS)) {
$this->match(($isPlus) ? Lexer::T_PLUS : Lexer::T_MINUS);
$sign = $isPlus;
}
$primary = $this->ArithmeticPrimary();
// Phase 1 AST optimization: Prevent AST\ArithmeticFactor
// if only one AST\ArithmeticPrimary is defined
if ($sign === null) {
return $primary;
}
return new AST\ArithmeticFactor($primary, $sign);
}
/**
* ArithmeticPrimary ::= SingleValuedPathExpression | Literal | ParenthesisExpression
* | FunctionsReturningNumerics | AggregateExpression | FunctionsReturningStrings
* | FunctionsReturningDatetime | IdentificationVariable | ResultVariable
* | InputParameter | CaseExpression
*/
public function ArithmeticPrimary()
{
if ($this->lexer->isNextToken(Lexer::T_OPEN_PARENTHESIS)) {
$this->match(Lexer::T_OPEN_PARENTHESIS);
$expr = $this->SimpleArithmeticExpression();
$this->match(Lexer::T_CLOSE_PARENTHESIS);
return new AST\ParenthesisExpression($expr);
}
switch ($this->lexer->lookahead['type']) {
case Lexer::T_COALESCE:
case Lexer::T_NULLIF:
case Lexer::T_CASE:
return $this->CaseExpression();
case Lexer::T_IDENTIFIER:
$peek = $this->lexer->glimpse();
if ($peek['value'] == '(') {
return $this->FunctionDeclaration();
}
if ($peek['value'] == '.') {
return $this->SingleValuedPathExpression();
}
if (isset($this->queryComponents[$this->lexer->lookahead['value']]['resultVariable'])) {
return $this->ResultVariable();
}
return $this->StateFieldPathExpression();
case Lexer::T_INPUT_PARAMETER:
return $this->InputParameter();
default:
$peek = $this->lexer->glimpse();
if ($peek['value'] == '(') {
return $this->FunctionDeclaration();
}
return $this->Literal();
}
}
/**
* StringExpression ::= StringPrimary | ResultVariable | "(" Subselect ")"
*
* @return \Doctrine\ORM\Query\AST\Subselect |
* string
*/
public function StringExpression()
{
$peek = $this->lexer->glimpse();
// Subselect
if ($this->lexer->isNextToken(Lexer::T_OPEN_PARENTHESIS) && $peek['type'] === Lexer::T_SELECT) {
$this->match(Lexer::T_OPEN_PARENTHESIS);
$expr = $this->Subselect();
$this->match(Lexer::T_CLOSE_PARENTHESIS);
return $expr;
}
// ResultVariable (string)
if ($this->lexer->isNextToken(Lexer::T_IDENTIFIER) &&
isset($this->queryComponents[$this->lexer->lookahead['value']]['resultVariable'])) {
return $this->ResultVariable();
}
return $this->StringPrimary();
}
/**
* StringPrimary ::= StateFieldPathExpression | string | InputParameter | FunctionsReturningStrings | AggregateExpression | CaseExpression
*/
public function StringPrimary()
{
$lookaheadType = $this->lexer->lookahead['type'];
switch ($lookaheadType) {
case Lexer::T_IDENTIFIER:
$peek = $this->lexer->glimpse();
if ($peek['value'] == '.') {
return $this->StateFieldPathExpression();
}
if ($peek['value'] == '(') {
// do NOT directly go to FunctionsReturningString() because it doesn't check for custom functions.
return $this->FunctionDeclaration();
}
$this->syntaxError("'.' or '('");
break;
case Lexer::T_STRING:
$this->match(Lexer::T_STRING);
return new AST\Literal(AST\Literal::STRING, $this->lexer->token['value']);
case Lexer::T_INPUT_PARAMETER:
return $this->InputParameter();
case Lexer::T_CASE:
case Lexer::T_COALESCE:
case Lexer::T_NULLIF:
return $this->CaseExpression();
}
$this->syntaxError(
'StateFieldPathExpression | string | InputParameter | FunctionsReturningStrings | AggregateExpression'
);
}
/**
* EntityExpression ::= SingleValuedAssociationPathExpression | SimpleEntityExpression
*
* @return \Doctrine\ORM\Query\AST\PathExpression |
* \Doctrine\ORM\Query\AST\SimpleEntityExpression
*/
public function EntityExpression()
{
$glimpse = $this->lexer->glimpse();
if ($this->lexer->isNextToken(Lexer::T_IDENTIFIER) && $glimpse['value'] === '.') {
return $this->SingleValuedAssociationPathExpression();
}
return $this->SimpleEntityExpression();
}
/**
* SimpleEntityExpression ::= IdentificationVariable | InputParameter
*
* @return string | \Doctrine\ORM\Query\AST\InputParameter
*/
public function SimpleEntityExpression()
{
if ($this->lexer->isNextToken(Lexer::T_INPUT_PARAMETER)) {
return $this->InputParameter();
}
return $this->StateFieldPathExpression();
}
/**
* AggregateExpression ::=
* ("AVG" | "MAX" | "MIN" | "SUM" | "COUNT") "(" ["DISTINCT"] SimpleArithmeticExpression ")"
*
* @return \Doctrine\ORM\Query\AST\AggregateExpression
*/
public function AggregateExpression()
{
$lookaheadType = $this->lexer->lookahead['type'];
$isDistinct = false;
if ( ! in_array($lookaheadType, [Lexer::T_COUNT, Lexer::T_AVG, Lexer::T_MAX, Lexer::T_MIN, Lexer::T_SUM])) {
$this->syntaxError('One of: MAX, MIN, AVG, SUM, COUNT');
}
$this->match($lookaheadType);
$functionName = $this->lexer->token['value'];
$this->match(Lexer::T_OPEN_PARENTHESIS);
if ($this->lexer->isNextToken(Lexer::T_DISTINCT)) {
$this->match(Lexer::T_DISTINCT);
$isDistinct = true;
}
$pathExp = $this->SimpleArithmeticExpression();
$this->match(Lexer::T_CLOSE_PARENTHESIS);
return new AST\AggregateExpression($functionName, $pathExp, $isDistinct);
}
/**
* QuantifiedExpression ::= ("ALL" | "ANY" | "SOME") "(" Subselect ")"
*
* @return \Doctrine\ORM\Query\AST\QuantifiedExpression
*/
public function QuantifiedExpression()
{
$lookaheadType = $this->lexer->lookahead['type'];
$value = $this->lexer->lookahead['value'];
if ( ! in_array($lookaheadType, [Lexer::T_ALL, Lexer::T_ANY, Lexer::T_SOME])) {
$this->syntaxError('ALL, ANY or SOME');
}
$this->match($lookaheadType);
$this->match(Lexer::T_OPEN_PARENTHESIS);
$qExpr = new AST\QuantifiedExpression($this->Subselect());
$qExpr->type = $value;
$this->match(Lexer::T_CLOSE_PARENTHESIS);
return $qExpr;
}
/**
* BetweenExpression ::= ArithmeticExpression ["NOT"] "BETWEEN" ArithmeticExpression "AND" ArithmeticExpression
*
* @return \Doctrine\ORM\Query\AST\BetweenExpression
*/
public function BetweenExpression()
{
$not = false;
$arithExpr1 = $this->A