/
matcher.cpp
1048 lines (925 loc) · 36.8 KB
/
matcher.cpp
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// matcher.cpp
/* Matcher is our boolean expression evaluator for "where" clauses */
/**
* Copyright (C) 2008 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "pch.h"
#include "matcher.h"
#include "../util/goodies.h"
#include "../util/unittest.h"
#include "diskloc.h"
#include "../scripting/engine.h"
#include "db.h"
#include "client.h"
#include "pdfile.h"
namespace {
inline pcrecpp::RE_Options flags2options(const char* flags) {
pcrecpp::RE_Options options;
options.set_utf8(true);
while ( flags && *flags ) {
if ( *flags == 'i' )
options.set_caseless(true);
else if ( *flags == 'm' )
options.set_multiline(true);
else if ( *flags == 'x' )
options.set_extended(true);
flags++;
}
return options;
}
}
//#define DEBUGMATCHER(x) cout << x << endl;
#define DEBUGMATCHER(x)
namespace mongo {
extern BSONObj staticNull;
class Where {
public:
Where() {
jsScope = 0;
func = 0;
}
~Where() {
if ( scope.get() )
scope->execSetup( "_mongo.readOnly = false;" , "make not read only" );
if ( jsScope ) {
delete jsScope;
jsScope = 0;
}
func = 0;
}
auto_ptr<Scope> scope;
ScriptingFunction func;
BSONObj *jsScope;
void setFunc(const char *code) {
massert( 10341 , "scope has to be created first!" , scope.get() );
func = scope->createFunction( code );
}
};
Matcher::~Matcher() {
delete where;
where = 0;
}
ElementMatcher::ElementMatcher( BSONElement _e , int _op, bool _isNot )
: toMatch( _e ) , compareOp( _op ), isNot( _isNot ), subMatcherOnPrimitives(false) {
if ( _op == BSONObj::opMOD ) {
BSONObj o = _e.embeddedObject();
mod = o["0"].numberInt();
modm = o["1"].numberInt();
uassert( 10073 , "mod can't be 0" , mod );
}
else if ( _op == BSONObj::opTYPE ) {
type = (BSONType)(_e.numberInt());
}
else if ( _op == BSONObj::opELEM_MATCH ) {
BSONElement m = _e;
uassert( 12517 , "$elemMatch needs an Object" , m.type() == Object );
BSONObj x = m.embeddedObject();
if ( x.firstElement().getGtLtOp() == 0 ) {
subMatcher.reset( new Matcher( x ) );
subMatcherOnPrimitives = false;
}
else {
// meant to act on primitives
subMatcher.reset( new Matcher( BSON( "" << x ) ) );
subMatcherOnPrimitives = true;
}
}
}
ElementMatcher::ElementMatcher( BSONElement _e , int _op , const BSONObj& array, bool _isNot )
: toMatch( _e ) , compareOp( _op ), isNot( _isNot ), subMatcherOnPrimitives(false) {
myset.reset( new set<BSONElement,element_lt>() );
BSONObjIterator i( array );
while ( i.more() ) {
BSONElement ie = i.next();
if ( _op == BSONObj::opALL && ie.type() == Object && ie.embeddedObject().firstElement().getGtLtOp() == BSONObj::opELEM_MATCH ) {
shared_ptr<Matcher> s;
s.reset( new Matcher( ie.embeddedObject().firstElement().embeddedObjectUserCheck() ) );
allMatchers.push_back( s );
}
else if ( ie.type() == RegEx ) {
if ( !myregex.get() ) {
myregex.reset( new vector< RegexMatcher >() );
}
myregex->push_back( RegexMatcher() );
RegexMatcher &rm = myregex->back();
rm.re.reset( new pcrecpp::RE( ie.regex(), flags2options( ie.regexFlags() ) ) );
rm.fieldName = 0; // no need for field name
rm.regex = ie.regex();
rm.flags = ie.regexFlags();
rm.isNot = false;
bool purePrefix;
string prefix = simpleRegex(rm.regex, rm.flags, &purePrefix);
if (purePrefix)
rm.prefix = prefix;
}
else {
myset->insert(ie);
}
}
if ( allMatchers.size() ) {
uassert( 13020 , "with $all, can't mix $elemMatch and others" , myset->size() == 0 && !myregex.get());
}
}
void Matcher::addRegex(const char *fieldName, const char *regex, const char *flags, bool isNot) {
if ( nRegex >= 4 ) {
out() << "ERROR: too many regexes in query" << endl;
}
else {
RegexMatcher& rm = regexs[nRegex];
rm.re.reset( new pcrecpp::RE(regex, flags2options(flags)) );
rm.fieldName = fieldName;
rm.regex = regex;
rm.flags = flags;
rm.isNot = isNot;
nRegex++;
if (!isNot) { //TODO something smarter
bool purePrefix;
string prefix = simpleRegex(regex, flags, &purePrefix);
if (purePrefix)
rm.prefix = prefix;
}
}
}
bool Matcher::addOp( const BSONElement &e, const BSONElement &fe, bool isNot, const char *& regex, const char *&flags ) {
const char *fn = fe.fieldName();
int op = fe.getGtLtOp( -1 );
if ( op == -1 ) {
if ( !isNot && fn[1] == 'r' && fn[2] == 'e' && fn[3] == 'f' && fn[4] == 0 ) {
return false; // { $ref : xxx } - treat as normal object
}
uassert( 10068 , (string)"invalid operator: " + fn , op != -1 );
}
switch ( op ) {
case BSONObj::GT:
case BSONObj::GTE:
case BSONObj::LT:
case BSONObj::LTE: {
shared_ptr< BSONObjBuilder > b( new BSONObjBuilder() );
_builders.push_back( b );
b->appendAs(fe, e.fieldName());
addBasic(b->done().firstElement(), op, isNot);
break;
}
case BSONObj::NE: {
haveNeg = true;
shared_ptr< BSONObjBuilder > b( new BSONObjBuilder() );
_builders.push_back( b );
b->appendAs(fe, e.fieldName());
addBasic(b->done().firstElement(), BSONObj::NE, isNot);
break;
}
case BSONObj::opALL:
all = true;
case BSONObj::opIN: {
uassert( 13276 , "$in needs an array" , fe.isABSONObj() );
basics.push_back( ElementMatcher( e , op , fe.embeddedObject(), isNot ) );
BSONObjIterator i( fe.embeddedObject() );
while( i.more() ) {
if ( i.next().type() == Array ) {
hasArray = true;
}
}
break;
}
case BSONObj::NIN:
uassert( 13277 , "$nin needs an array" , fe.isABSONObj() );
haveNeg = true;
basics.push_back( ElementMatcher( e , op , fe.embeddedObject(), isNot ) );
break;
case BSONObj::opMOD:
case BSONObj::opTYPE:
case BSONObj::opELEM_MATCH: {
shared_ptr< BSONObjBuilder > b( new BSONObjBuilder() );
_builders.push_back( b );
b->appendAs(fe, e.fieldName());
// these are types where ElementMatcher has all the info
basics.push_back( ElementMatcher( b->done().firstElement() , op, isNot ) );
break;
}
case BSONObj::opSIZE: {
shared_ptr< BSONObjBuilder > b( new BSONObjBuilder() );
_builders.push_back( b );
b->appendAs(fe, e.fieldName());
addBasic(b->done().firstElement(), BSONObj::opSIZE, isNot);
haveSize = true;
break;
}
case BSONObj::opEXISTS: {
shared_ptr< BSONObjBuilder > b( new BSONObjBuilder() );
_builders.push_back( b );
b->appendAs(fe, e.fieldName());
addBasic(b->done().firstElement(), BSONObj::opEXISTS, isNot);
break;
}
case BSONObj::opREGEX: {
uassert( 13032, "can't use $not with $regex, use BSON regex type instead", !isNot );
if ( fe.type() == RegEx ) {
regex = fe.regex();
flags = fe.regexFlags();
}
else {
regex = fe.valuestrsafe();
}
break;
}
case BSONObj::opOPTIONS: {
uassert( 13029, "can't use $not with $options, use BSON regex type instead", !isNot );
flags = fe.valuestrsafe();
break;
}
case BSONObj::opNEAR:
case BSONObj::opWITHIN:
case BSONObj::opMAX_DISTANCE:
break;
default:
uassert( 10069 , (string)"BUG - can't operator for: " + fn , 0 );
}
return true;
}
void Matcher::parseOr( const BSONElement &e, bool subMatcher, list< shared_ptr< Matcher > > &matchers ) {
uassert( 13090, "nested $or/$nor not allowed", !subMatcher );
uassert( 13086, "$or/$nor must be a nonempty array", e.type() == Array && e.embeddedObject().nFields() > 0 );
BSONObjIterator j( e.embeddedObject() );
while( j.more() ) {
BSONElement f = j.next();
uassert( 13087, "$or/$nor match element must be an object", f.type() == Object );
// until SERVER-109 this is never a covered index match, so don't constrain index key for $or matchers
matchers.push_back( shared_ptr< Matcher >( new Matcher( f.embeddedObject(), true ) ) );
}
}
bool Matcher::parseOrNor( const BSONElement &e, bool subMatcher ) {
const char *ef = e.fieldName();
if ( ef[ 0 ] != '$' )
return false;
if ( ef[ 1 ] == 'o' && ef[ 2 ] == 'r' && ef[ 3 ] == 0 ) {
parseOr( e, subMatcher, _orMatchers );
}
else if ( ef[ 1 ] == 'n' && ef[ 2 ] == 'o' && ef[ 3 ] == 'r' && ef[ 4 ] == 0 ) {
parseOr( e, subMatcher, _norMatchers );
}
else {
return false;
}
return true;
}
/* _jsobj - the query pattern
*/
Matcher::Matcher(const BSONObj &_jsobj, bool subMatcher) :
where(0), jsobj(_jsobj), haveSize(), all(), hasArray(0), haveNeg(), _atomic(false), nRegex(0) {
BSONObjIterator i(jsobj);
while ( i.more() ) {
BSONElement e = i.next();
uassert( 13629 , "can't have undefined in a query expression" , e.type() != Undefined );
if ( parseOrNor( e, subMatcher ) ) {
continue;
}
if ( ( e.type() == CodeWScope || e.type() == Code || e.type() == String ) && strcmp(e.fieldName(), "$where")==0 ) {
// $where: function()...
uassert( 10066 , "$where occurs twice?", where == 0 );
uassert( 10067 , "$where query, but no script engine", globalScriptEngine );
massert( 13089 , "no current client needed for $where" , haveClient() );
where = new Where();
where->scope = globalScriptEngine->getPooledScope( cc().ns() );
where->scope->localConnect( cc().database()->name.c_str() );
if ( e.type() == CodeWScope ) {
where->setFunc( e.codeWScopeCode() );
where->jsScope = new BSONObj( e.codeWScopeScopeData() );
}
else {
const char *code = e.valuestr();
where->setFunc(code);
}
where->scope->execSetup( "_mongo.readOnly = true;" , "make read only" );
continue;
}
if ( e.type() == RegEx ) {
addRegex( e.fieldName(), e.regex(), e.regexFlags() );
continue;
}
// greater than / less than...
// e.g., e == { a : { $gt : 3 } }
// or
// { a : { $in : [1,2,3] } }
if ( e.type() == Object ) {
// support {$regex:"a|b", $options:"imx"}
const char* regex = NULL;
const char* flags = "";
// e.g., fe == { $gt : 3 }
BSONObjIterator j(e.embeddedObject());
bool isOperator = false;
while ( j.more() ) {
BSONElement fe = j.next();
const char *fn = fe.fieldName();
if ( fn[0] == '$' && fn[1] ) {
isOperator = true;
if ( fn[1] == 'n' && fn[2] == 'o' && fn[3] == 't' && fn[4] == 0 ) {
haveNeg = true;
switch( fe.type() ) {
case Object: {
BSONObjIterator k( fe.embeddedObject() );
uassert( 13030, "$not cannot be empty", k.more() );
while( k.more() ) {
addOp( e, k.next(), true, regex, flags );
}
break;
}
case RegEx:
addRegex( e.fieldName(), fe.regex(), fe.regexFlags(), true );
break;
default:
uassert( 13031, "invalid use of $not", false );
}
}
else {
if ( !addOp( e, fe, false, regex, flags ) ) {
isOperator = false;
break;
}
}
}
else {
isOperator = false;
break;
}
}
if (regex) {
addRegex(e.fieldName(), regex, flags);
}
if ( isOperator )
continue;
}
if ( e.type() == Array ) {
hasArray = true;
}
else if( strcmp(e.fieldName(), "$atomic") == 0 ) {
_atomic = e.trueValue();
continue;
}
// normal, simple case e.g. { a : "foo" }
addBasic(e, BSONObj::Equality, false);
}
}
Matcher::Matcher( const Matcher &other, const BSONObj &key ) :
where(0), constrainIndexKey_( key ), haveSize(), all(), hasArray(0), haveNeg(), _atomic(false), nRegex(0) {
// do not include field matches which would make keyMatch() false
for( vector< ElementMatcher >::const_iterator i = other.basics.begin(); i != other.basics.end(); ++i ) {
if ( key.hasField( i->toMatch.fieldName() ) ) {
switch( i->compareOp ) {
case BSONObj::opSIZE:
case BSONObj::opALL:
case BSONObj::NE:
case BSONObj::NIN:
break;
case BSONObj::opIN: {
bool inContainsArray = false;
for( set<BSONElement,element_lt>::const_iterator j = i->myset->begin(); j != i->myset->end(); ++j ) {
if ( j->type() == Array ) {
inContainsArray = true;
break;
}
}
// Can't match an array to its first indexed element.
if ( !i->isNot && !inContainsArray ) {
basics.push_back( *i );
}
break;
}
default: {
// Can't match an array to its first indexed element.
if ( !i->isNot && i->toMatch.type() != Array ) {
basics.push_back( *i );
}
}
}
}
}
for( int i = 0; i < other.nRegex; ++i ) {
if ( !other.regexs[ i ].isNot && key.hasField( other.regexs[ i ].fieldName ) ) {
regexs[ nRegex++ ] = other.regexs[ i ];
}
}
for( list< shared_ptr< Matcher > >::const_iterator i = other._orMatchers.begin(); i != other._orMatchers.end(); ++i ) {
_orMatchers.push_back( shared_ptr< Matcher >( new Matcher( **i, key ) ) );
}
}
inline bool regexMatches(const RegexMatcher& rm, const BSONElement& e) {
switch (e.type()) {
case String:
case Symbol:
if (rm.prefix.empty())
return rm.re->PartialMatch(e.valuestr());
else
return !strncmp(e.valuestr(), rm.prefix.c_str(), rm.prefix.size());
case RegEx:
return !strcmp(rm.regex, e.regex()) && !strcmp(rm.flags, e.regexFlags());
default:
return false;
}
}
inline int Matcher::valuesMatch(const BSONElement& l, const BSONElement& r, int op, const ElementMatcher& bm) {
assert( op != BSONObj::NE && op != BSONObj::NIN );
if ( op == BSONObj::Equality ) {
return l.valuesEqual(r);
}
if ( op == BSONObj::opIN ) {
// { $in : [1,2,3] }
int count = bm.myset->count(l);
if ( count )
return count;
if ( bm.myregex.get() ) {
for( vector<RegexMatcher>::const_iterator i = bm.myregex->begin(); i != bm.myregex->end(); ++i ) {
if ( regexMatches( *i, l ) ) {
return true;
}
}
}
}
if ( op == BSONObj::opSIZE ) {
if ( l.type() != Array )
return 0;
int count = 0;
BSONObjIterator i( l.embeddedObject() );
while( i.moreWithEOO() ) {
BSONElement e = i.next();
if ( e.eoo() )
break;
++count;
}
return count == r.number();
}
if ( op == BSONObj::opMOD ) {
if ( ! l.isNumber() )
return false;
return l.numberLong() % bm.mod == bm.modm;
}
if ( op == BSONObj::opTYPE ) {
return bm.type == l.type();
}
/* check LT, GTE, ... */
if ( l.canonicalType() != r.canonicalType() )
return false;
int c = compareElementValues(l, r);
if ( c < -1 ) c = -1;
if ( c > 1 ) c = 1;
int z = 1 << (c+1);
return (op & z);
}
int Matcher::matchesNe(const char *fieldName, const BSONElement &toMatch, const BSONObj &obj, const ElementMatcher& bm , MatchDetails * details ) {
int ret = matchesDotted( fieldName, toMatch, obj, BSONObj::Equality, bm , false , details );
if ( bm.toMatch.type() != jstNULL )
return ( ret <= 0 ) ? 1 : 0;
else
return -ret;
}
int retMissing( const ElementMatcher &bm ) {
if ( bm.compareOp != BSONObj::opEXISTS )
return 0;
return ( bm.toMatch.boolean() ^ bm.isNot ) ? -1 : 1;
}
/* Check if a particular field matches.
fieldName - field to match "a.b" if we are reaching into an embedded object.
toMatch - element we want to match.
obj - database object to check against
compareOp - Equality, LT, GT, etc.
isArr -
Special forms:
{ "a.b" : 3 } means obj.a.b == 3
{ a : { $lt : 3 } } means obj.a < 3
{ a : { $in : [1,2] } } means [1,2].contains(obj.a)
return value
-1 mismatch
0 missing element
1 match
*/
int Matcher::matchesDotted(const char *fieldName, const BSONElement& toMatch, const BSONObj& obj, int compareOp, const ElementMatcher& em , bool isArr, MatchDetails * details ) {
DEBUGMATCHER( "\t matchesDotted : " << fieldName << " hasDetails: " << ( details ? "yes" : "no" ) );
if ( compareOp == BSONObj::opALL ) {
if ( em.allMatchers.size() ) {
BSONElement e = obj.getFieldDotted( fieldName );
uassert( 13021 , "$all/$elemMatch needs to be applied to array" , e.type() == Array );
for ( unsigned i=0; i<em.allMatchers.size(); i++ ) {
bool found = false;
BSONObjIterator x( e.embeddedObject() );
while ( x.more() ) {
BSONElement f = x.next();
if ( f.type() != Object )
continue;
if ( em.allMatchers[i]->matches( f.embeddedObject() ) ) {
found = true;
break;
}
}
if ( ! found )
return -1;
}
return 1;
}
if ( em.myset->size() == 0 && !em.myregex.get() )
return -1; // is this desired?
BSONElementSet myValues;
obj.getFieldsDotted( fieldName , myValues );
for( set< BSONElement, element_lt >::const_iterator i = em.myset->begin(); i != em.myset->end(); ++i ) {
// ignore nulls
if ( i->type() == jstNULL )
continue;
if ( myValues.count( *i ) == 0 )
return -1;
}
if ( !em.myregex.get() )
return 1;
for( vector< RegexMatcher >::const_iterator i = em.myregex->begin(); i != em.myregex->end(); ++i ) {
bool match = false;
for( BSONElementSet::const_iterator j = myValues.begin(); j != myValues.end(); ++j ) {
if ( regexMatches( *i, *j ) ) {
match = true;
break;
}
}
if ( !match )
return -1;
}
return 1;
} // end opALL
if ( compareOp == BSONObj::NE )
return matchesNe( fieldName, toMatch, obj, em , details );
if ( compareOp == BSONObj::NIN ) {
for( set<BSONElement,element_lt>::const_iterator i = em.myset->begin(); i != em.myset->end(); ++i ) {
int ret = matchesNe( fieldName, *i, obj, em , details );
if ( ret != 1 )
return ret;
}
if ( em.myregex.get() ) {
BSONElementSet s;
obj.getFieldsDotted( fieldName, s );
for( vector<RegexMatcher>::const_iterator i = em.myregex->begin(); i != em.myregex->end(); ++i ) {
for( BSONElementSet::const_iterator j = s.begin(); j != s.end(); ++j ) {
if ( regexMatches( *i, *j ) ) {
return -1;
}
}
}
}
return 1;
}
BSONElement e;
bool indexed = !constrainIndexKey_.isEmpty();
if ( indexed ) {
e = obj.getFieldUsingIndexNames(fieldName, constrainIndexKey_);
if( e.eoo() ) {
cout << "obj: " << obj << endl;
cout << "fieldName: " << fieldName << endl;
cout << "constrainIndexKey_: " << constrainIndexKey_ << endl;
assert( !e.eoo() );
}
}
else {
const char *p = strchr(fieldName, '.');
if ( p ) {
string left(fieldName, p-fieldName);
BSONElement se = obj.getField(left.c_str());
if ( se.eoo() )
;
else if ( se.type() != Object && se.type() != Array )
;
else {
BSONObj eo = se.embeddedObject();
return matchesDotted(p+1, toMatch, eo, compareOp, em, se.type() == Array , details );
}
}
// An array was encountered while scanning for components of the field name.
if ( isArr ) {
DEBUGMATCHER( "\t\t isArr 1 : obj : " << obj );
BSONObjIterator ai(obj);
bool found = false;
while ( ai.moreWithEOO() ) {
BSONElement z = ai.next();
if( strcmp(z.fieldName(),fieldName) == 0 && valuesMatch(z, toMatch, compareOp, em) ) {
// "field.<n>" array notation was used
if ( details )
details->elemMatchKey = z.fieldName();
return 1;
}
if ( z.type() == Object ) {
BSONObj eo = z.embeddedObject();
int cmp = matchesDotted(fieldName, toMatch, eo, compareOp, em, false, details );
if ( cmp > 0 ) {
if ( details )
details->elemMatchKey = z.fieldName();
return 1;
}
else if ( cmp < 0 ) {
found = true;
}
}
}
return found ? -1 : retMissing( em );
}
if( p ) {
// Left portion of field name was not found.
return retMissing( em );
}
else {
e = obj.getField(fieldName);
}
}
if ( compareOp == BSONObj::opEXISTS ) {
return ( e.eoo() ^ ( toMatch.boolean() ^ em.isNot ) ) ? 1 : -1;
}
else if ( ( e.type() != Array || indexed || compareOp == BSONObj::opSIZE ) &&
valuesMatch(e, toMatch, compareOp, em ) ) {
return 1;
}
else if ( e.type() == Array && compareOp != BSONObj::opSIZE ) {
BSONObjIterator ai(e.embeddedObject());
while ( ai.moreWithEOO() ) {
BSONElement z = ai.next();
if ( compareOp == BSONObj::opELEM_MATCH ) {
if ( z.type() == Object ) {
if ( em.subMatcher->matches( z.embeddedObject() ) ) {
if ( details )
details->elemMatchKey = z.fieldName();
return 1;
}
}
else if ( em.subMatcherOnPrimitives ) {
if ( z.type() && em.subMatcher->matches( z.wrap( "" ) ) ) {
if ( details )
details->elemMatchKey = z.fieldName();
return 1;
}
}
}
else {
if ( valuesMatch( z, toMatch, compareOp, em) ) {
if ( details )
details->elemMatchKey = z.fieldName();
return 1;
}
}
}
// match an entire array to itself
if ( compareOp == BSONObj::Equality && e.woCompare( toMatch , false ) == 0 ) {
return 1;
}
if ( compareOp == BSONObj::opIN && valuesMatch( e, toMatch, compareOp, em ) ) {
return 1;
}
}
else if ( e.eoo() ) {
// 0 indicates "missing element"
// opEXISTS case already handled above, so retMissing() is unnecessary.
return 0;
}
return -1;
}
extern int dump;
/* See if an object matches the query.
*/
bool Matcher::matches(const BSONObj& jsobj , MatchDetails * details ) {
/* assuming there is usually only one thing to match. if more this
could be slow sometimes. */
// check normal non-regex cases:
for ( unsigned i = 0; i < basics.size(); i++ ) {
ElementMatcher& bm = basics[i];
BSONElement& m = bm.toMatch;
// -1=mismatch. 0=missing element. 1=match
int cmp = matchesDotted(m.fieldName(), m, jsobj, bm.compareOp, bm , false , details );
if ( bm.compareOp != BSONObj::opEXISTS && bm.isNot )
cmp = -cmp;
if ( cmp < 0 )
return false;
if ( cmp == 0 ) {
/* missing is ok iff we were looking for null */
if ( m.type() == jstNULL || m.type() == Undefined || ( bm.compareOp == BSONObj::opIN && bm.myset->count( staticNull.firstElement() ) > 0 ) ) {
if ( ( bm.compareOp == BSONObj::NE ) ^ bm.isNot ) {
return false;
}
}
else {
if ( !bm.isNot ) {
return false;
}
}
}
}
for ( int r = 0; r < nRegex; r++ ) {
RegexMatcher& rm = regexs[r];
BSONElementSet s;
if ( !constrainIndexKey_.isEmpty() ) {
BSONElement e = jsobj.getFieldUsingIndexNames(rm.fieldName, constrainIndexKey_);
if ( !e.eoo() )
s.insert( e );
}
else {
jsobj.getFieldsDotted( rm.fieldName, s );
}
bool match = false;
for( BSONElementSet::const_iterator i = s.begin(); i != s.end(); ++i )
if ( regexMatches(rm, *i) )
match = true;
if ( !match ^ rm.isNot )
return false;
}
if ( _orMatchers.size() > 0 ) {
bool match = false;
for( list< shared_ptr< Matcher > >::const_iterator i = _orMatchers.begin();
i != _orMatchers.end(); ++i ) {
// SERVER-205 don't submit details - we don't want to track field
// matched within $or, and at this point we've already loaded the
// whole document
if ( (*i)->matches( jsobj ) ) {
match = true;
break;
}
}
if ( !match ) {
return false;
}
}
if ( _norMatchers.size() > 0 ) {
for( list< shared_ptr< Matcher > >::const_iterator i = _norMatchers.begin();
i != _norMatchers.end(); ++i ) {
// SERVER-205 don't submit details - we don't want to track field
// matched within $nor, and at this point we've already loaded the
// whole document
if ( (*i)->matches( jsobj ) ) {
return false;
}
}
}
for( vector< shared_ptr< FieldRangeVector > >::const_iterator i = _orConstraints.begin();
i != _orConstraints.end(); ++i ) {
if ( (*i)->matches( jsobj ) ) {
return false;
}
}
if ( where ) {
if ( where->func == 0 ) {
uassert( 10070 , "$where compile error", false);
return false; // didn't compile
}
if ( where->jsScope ) {
where->scope->init( where->jsScope );
}
where->scope->setThis( const_cast< BSONObj * >( &jsobj ) );
where->scope->setObject( "obj", const_cast< BSONObj & >( jsobj ) );
where->scope->setBoolean( "fullObject" , true ); // this is a hack b/c fullObject used to be relevant
int err = where->scope->invoke( where->func , BSONObj() , 1000 * 60 , false );
where->scope->setThis( 0 );
if ( err == -3 ) { // INVOKE_ERROR
stringstream ss;
ss << "error on invocation of $where function:\n"
<< where->scope->getError();
uassert( 10071 , ss.str(), false);
return false;
}
else if ( err != 0 ) { // ! INVOKE_SUCCESS
uassert( 10072 , "unknown error in invocation of $where function", false);
return false;
}
return where->scope->getBoolean( "return" ) != 0;
}
return true;
}
bool Matcher::hasType( BSONObj::MatchType type ) const {
for ( unsigned i=0; i<basics.size() ; i++ )
if ( basics[i].compareOp == type )
return true;
return false;
}
bool Matcher::sameCriteriaCount( const Matcher &other ) const {
if ( !( basics.size() == other.basics.size() && nRegex == other.nRegex && !where == !other.where ) ) {
return false;
}
if ( _norMatchers.size() != other._norMatchers.size() ) {
return false;
}
if ( _orMatchers.size() != other._orMatchers.size() ) {
return false;
}
if ( _orConstraints.size() != other._orConstraints.size() ) {
return false;
}
{
list< shared_ptr< Matcher > >::const_iterator i = _norMatchers.begin();
list< shared_ptr< Matcher > >::const_iterator j = other._norMatchers.begin();
while( i != _norMatchers.end() ) {
if ( !(*i)->sameCriteriaCount( **j ) ) {
return false;
}
++i; ++j;
}
}
{
list< shared_ptr< Matcher > >::const_iterator i = _orMatchers.begin();
list< shared_ptr< Matcher > >::const_iterator j = other._orMatchers.begin();
while( i != _orMatchers.end() ) {
if ( !(*i)->sameCriteriaCount( **j ) ) {
return false;
}
++i; ++j;
}
}
return true;
}
/*- just for testing -- */
#pragma pack(1)
struct JSObj1 {
JSObj1() {
totsize=sizeof(JSObj1);
n = NumberDouble;
strcpy_s(nname, 5, "abcd");
N = 3.1;
s = String;
strcpy_s(sname, 7, "abcdef");
slen = 10;
strcpy_s(sval, 10, "123456789");
eoo = EOO;
}
unsigned totsize;
char n;
char nname[5];
double N;
char s;
char sname[7];
unsigned slen;
char sval[10];
char eoo;
};
#pragma pack()
struct JSObj1 js1;
#pragma pack(1)
struct JSObj2 {
JSObj2() {
totsize=sizeof(JSObj2);
s = String;
strcpy_s(sname, 7, "abcdef");
slen = 10;
strcpy_s(sval, 10, "123456789");
eoo = EOO;
}
unsigned totsize;
char s;
char sname[7];
unsigned slen;
char sval[10];
char eoo;
} js2;
struct JSUnitTest : public UnitTest {
void run() {
BSONObj j1((const char *) &js1);
BSONObj j2((const char *) &js2);
Matcher m(j2);
assert( m.matches(j1) );
js2.sval[0] = 'z';
assert( !m.matches(j1) );
Matcher n(j1);
assert( n.matches(j1) );
assert( !n.matches(j2) );