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CodeFactory.java
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CodeFactory.java
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/**
* Copyright (C) 2006-2019 INRIA and contributors
*
* Spoon is available either under the terms of the MIT License (see LICENSE-MIT.txt) of the Cecill-C License (see LICENSE-CECILL-C.txt). You as the user are entitled to choose the terms under which to adopt Spoon.
*/
package spoon.reflect.factory;
import spoon.SpoonException;
import spoon.reflect.code.BinaryOperatorKind;
import spoon.reflect.code.CtAssignment;
import spoon.reflect.code.CtBinaryOperator;
import spoon.reflect.code.CtBlock;
import spoon.reflect.code.CtCatch;
import spoon.reflect.code.CtCatchVariable;
import spoon.reflect.code.CtCodeSnippetExpression;
import spoon.reflect.code.CtCodeSnippetStatement;
import spoon.reflect.code.CtComment;
import spoon.reflect.code.CtConstructorCall;
import spoon.reflect.code.CtExpression;
import spoon.reflect.code.CtFieldAccess;
import spoon.reflect.code.CtFieldRead;
import spoon.reflect.code.CtInvocation;
import spoon.reflect.code.CtJavaDocTag;
import spoon.reflect.code.CtLiteral;
import spoon.reflect.code.CtLocalVariable;
import spoon.reflect.code.CtNewArray;
import spoon.reflect.code.CtNewClass;
import spoon.reflect.code.CtStatement;
import spoon.reflect.code.CtStatementList;
import spoon.reflect.code.CtThisAccess;
import spoon.reflect.code.CtThrow;
import spoon.reflect.code.CtTypeAccess;
import spoon.reflect.code.CtVariableAccess;
import spoon.reflect.declaration.CtAnnotation;
import spoon.reflect.declaration.CtClass;
import spoon.reflect.declaration.CtConstructor;
import spoon.reflect.declaration.CtField;
import spoon.reflect.declaration.CtNamedElement;
import spoon.reflect.declaration.CtType;
import spoon.reflect.declaration.CtVariable;
import spoon.reflect.declaration.ModifierKind;
import spoon.reflect.reference.CtArrayTypeReference;
import spoon.reflect.reference.CtCatchVariableReference;
import spoon.reflect.reference.CtExecutableReference;
import spoon.reflect.reference.CtFieldReference;
import spoon.reflect.reference.CtLocalVariableReference;
import spoon.reflect.reference.CtPackageReference;
import spoon.reflect.reference.CtReference;
import spoon.reflect.reference.CtTypeReference;
import spoon.reflect.reference.CtVariableReference;
import java.lang.annotation.Annotation;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.EnumSet;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/**
* This sub-factory contains utility methods to create code elements. To avoid
* over-using reflection, consider using {@link spoon.template.Template}.
*/
public class CodeFactory extends SubFactory {
/**
* Creates a {@link spoon.reflect.code.CtCodeElement} sub-factory.
*/
public CodeFactory(Factory factory) {
super(factory);
}
/**
* Creates a binary operator.
*
* @param <T>
* the type of the expression
* @param left
* the left operand
* @param right
* the right operand
* @param kind
* the operator kind
* @return a binary operator expression
*/
public <T> CtBinaryOperator<T> createBinaryOperator(CtExpression<?> left, CtExpression<?> right, BinaryOperatorKind kind) {
return factory.Core().<T>createBinaryOperator().setLeftHandOperand(left).setKind(kind).setRightHandOperand(right);
}
/**
* Creates a accessed type.
*
* <p>This method sets a <i>clone</i> of the given {@code accessedType} object to the
* {@linkplain CtTypeAccess#getAccessedType() accessedType} field of the returned {@link CtTypeAccess}. If the
* given {@code accessedType} is unique and cloning is not needed, use
* {@link #createTypeAccessWithoutCloningReference(CtTypeReference)} instead of this method.</p>
* @param accessedType a type reference to the accessed type.
* @param <T> the type of the expression.
* @return a accessed type expression.
*/
public <T> CtTypeAccess<T> createTypeAccess(CtTypeReference<T> accessedType) {
if (accessedType == null) {
return factory.Core().createTypeAccess();
}
CtTypeReference<T> access = accessedType.clone();
// a type access doesn't contain actual type parameters
access.setActualTypeArguments(null);
return createTypeAccessWithoutCloningReference(access);
}
/**
* Creates a accessed type.
*
* <p>This method sets a <i>clone</i> of the given {@code accessedType} object to the
* {@linkplain CtTypeAccess#getAccessedType() accessedType} field of the returned {@link CtTypeAccess}. If the
* given {@code accessedType} is unique and cloning is not needed, use
* {@link #createTypeAccessWithoutCloningReference(CtTypeReference)} instead of this method.</p>
*
* @param accessedType
* a type reference to the accessed type.
* @param isImplicit
* type of the type access is implicit or not.
* @param <T>
* the type of the expression.
* @return a accessed type expression.
*/
public <T> CtTypeAccess<T> createTypeAccess(CtTypeReference<T> accessedType, boolean isImplicit) {
return createTypeAccess(accessedType).setImplicit(isImplicit);
}
/**
* Creates a accessed type, see {@link #createTypeAccess(CtTypeReference)} for details.
* @param accessedType a type reference to the accessed type.
* @param <T> the type of the expression.
* @return a accessed type expression.
*/
public <T> CtTypeAccess<T> createTypeAccessWithoutCloningReference(CtTypeReference<T> accessedType) {
final CtTypeAccess<T> typeAccess = factory.Core().createTypeAccess();
typeAccess.setAccessedType(accessedType);
return typeAccess;
}
/**
* Creates a class access expression of the form <code>C.class</code>.
*
* @param <T>
* the actual type of the accessed class if available
* @param type
* a type reference to the accessed class
* @return the class access expression.
*/
public <T> CtFieldAccess<Class<T>> createClassAccess(CtTypeReference<T> type) {
@SuppressWarnings({ "rawtypes", "unchecked" }) CtTypeReference<Class<T>> classType = (CtTypeReference) factory.Type().createReference(Class.class);
CtTypeAccess<T> typeAccess = factory.Code().createTypeAccess(type);
CtFieldReference<Class<T>> fieldReference = factory.Core().createFieldReference();
fieldReference.setSimpleName("class");
fieldReference.setType(classType);
fieldReference.setDeclaringType(type);
CtFieldRead<Class<T>> fieldRead = factory.Core().createFieldRead();
fieldRead.setType(classType.clone());
fieldRead.setVariable(fieldReference);
fieldRead.setTarget(typeAccess);
return fieldRead;
}
/**
* Creates a constructor call. The correct constructor is inferred based on parameters
*
* @param type the decelerating type of the constructor
* @param parameters the arguments of the constructor call
* @param <T> the actual type of the decelerating type of the constructor if available
* @return the constructor call
*/
public <T> CtConstructorCall<T> createConstructorCall(CtTypeReference<T> type, CtExpression<?>...parameters) {
CtConstructorCall<T> constructorCall = factory.Core()
.createConstructorCall();
CtExecutableReference<T> executableReference = factory.Core()
.createExecutableReference();
executableReference.setType(type);
executableReference.setDeclaringType(type == null ? type : type.clone());
executableReference.setSimpleName(CtExecutableReference.CONSTRUCTOR_NAME);
List<CtTypeReference<?>> typeReferences = new ArrayList<>();
for (CtExpression<?> parameter : parameters) {
typeReferences.add(parameter.getType());
}
executableReference.setParameters(typeReferences);
constructorCall.setArguments(Arrays.asList(parameters));
constructorCall.setExecutable(executableReference);
return constructorCall;
}
/**
* Creates a new anonymous class.
*/
public <T> CtNewClass<T> createNewClass(CtType<T> superClass, CtExpression<?>...parameters) {
CtNewClass<T> ctNewClass = factory.Core().createNewClass();
CtConstructor<T> constructor = ((CtClass) superClass).getConstructor(Arrays.stream(parameters).map(x -> x.getType()).toArray(CtTypeReference[]::new));
if (constructor == null) {
throw new SpoonException("no appropriate constructor for these parameters " + Arrays.toString(parameters));
}
CtExecutableReference<T> executableReference = constructor.getReference();
ctNewClass.setArguments(Arrays.asList(parameters));
ctNewClass.setExecutable(executableReference);
CtClass c = superClass.getFactory().createClass();
c.setSuperclass(superClass.getReference());
c.setSimpleName("0");
ctNewClass.setAnonymousClass(c);
return ctNewClass;
}
/**
* Creates an invocation (can be a statement or an expression).
*
* @param <T>
* the return type of the invoked method
* @param target
* the target expression
* @param executable
* the invoked executable
* @param arguments
* the argument list
* @return the new invocation
*/
public <T> CtInvocation<T> createInvocation(CtExpression<?> target, CtExecutableReference<T> executable, CtExpression<?>... arguments) {
List<CtExpression<?>> ext = new ArrayList<>(arguments.length);
Collections.addAll(ext, arguments);
return createInvocation(target, executable, ext);
}
/**
* Creates an invocation (can be a statement or an expression).
*
* @param <T>
* the return type of the invoked method
* @param target
* the target expression (may be null for static methods)
* @param executable
* the invoked executable
* @param arguments
* the argument list
* @return the new invocation
*/
public <T> CtInvocation<T> createInvocation(CtExpression<?> target, CtExecutableReference<T> executable, List<CtExpression<?>> arguments) {
return factory.Core().<T>createInvocation().<CtInvocation<T>>setTarget(target).<CtInvocation<T>>setExecutable(executable).setArguments(arguments);
}
/**
* Creates a literal with a given value.
*
* @param <T>
* the type of the literal
* @param value
* the value of the literal
* @return a new literal
*/
public <T> CtLiteral<T> createLiteral(T value) {
CtLiteral<T> literal = factory.Core().<T>createLiteral();
literal.setValue(value);
if (value != null) {
literal.setType((CtTypeReference<T>) factory.Type().<T>createReference((Class<T>) value.getClass()).unbox());
} else {
literal.setType((CtTypeReference<T>) factory.Type().nullType());
}
return literal;
}
/**
* Creates a one-dimension array that must only contain literals.
*/
@SuppressWarnings("unchecked")
public <T> CtNewArray<T[]> createLiteralArray(T[] value) {
if (!value.getClass().isArray()) {
throw new RuntimeException("value is not an array");
}
if (value.getClass().getComponentType().isArray()) {
throw new RuntimeException("can only create one-dimension arrays");
}
final CtTypeReference<T> componentTypeRef = factory.Type().createReference((Class<T>) value.getClass().getComponentType());
final CtArrayTypeReference<T[]> arrayReference = factory.Type().createArrayReference(componentTypeRef);
CtNewArray<T[]> array = factory.Core().<T[]>createNewArray().setType(arrayReference);
for (T e : value) {
CtLiteral<T> l = factory.Core().createLiteral();
l.setValue(e);
array.addElement(l);
}
return array;
}
/**
* Creates a local variable declaration.
*
* @param <T>
* the local variable type
* @param type
* the reference to the type
* @param name
* the name of the variable
* @param defaultExpression
* the assigned default expression
* @return a new local variable declaration
*/
public <T> CtLocalVariable<T> createLocalVariable(CtTypeReference<T> type, String name, CtExpression<T> defaultExpression) {
return factory.Core().<T>createLocalVariable().<CtLocalVariable<T>>setSimpleName(name).<CtLocalVariable<T>>setType(type).setDefaultExpression(defaultExpression);
}
/**
* Creates a local variable reference that points to an existing local
* variable (strong referencing).
*/
public <T> CtLocalVariableReference<T> createLocalVariableReference(CtLocalVariable<T> localVariable) {
CtLocalVariableReference<T> ref = factory.Core().createLocalVariableReference();
ref.setType(localVariable.getType() == null ? null : localVariable.getType().clone());
ref.setSimpleName(localVariable.getSimpleName());
ref.setParent(localVariable);
return ref;
}
/**
* Creates a local variable reference with its name an type (weak
* referencing).
*/
public <T> CtLocalVariableReference<T> createLocalVariableReference(CtTypeReference<T> type, String name) {
return factory.Core().<T>createLocalVariableReference().setType(type).setSimpleName(name);
}
/**
* Creates a catch variable declaration.
*
* @param <T>
* the catch variable type
* @param type
* the reference to the type
* @param name
* the name of the variable
* @param modifierKinds
* Modifiers of the catch variable
* @return a new catch variable declaration
*/
public <T> CtCatchVariable<T> createCatchVariable(CtTypeReference<T> type, String name, ModifierKind...modifierKinds) {
return factory.Core().<T>createCatchVariable().<CtCatchVariable<T>>setSimpleName(name).<CtCatchVariable<T>>setType(type).setModifiers(new HashSet<>(Arrays.asList(modifierKinds)));
}
/**
* Creates a catch variable reference that points to an existing catch
* variable (strong referencing).
*/
public <T> CtCatchVariableReference<T> createCatchVariableReference(CtCatchVariable<T> catchVariable) {
return factory.Core().<T>createCatchVariableReference().setType(catchVariable.getType()).<CtCatchVariableReference<T>>setSimpleName(catchVariable.getSimpleName());
}
/**
* Creates a new statement list from an existing block.
*/
public <R> CtStatementList createStatementList(CtBlock<R> block) {
CtStatementList l = factory.Core().createStatementList();
for (CtStatement s : block.getStatements()) {
l.addStatement(s.clone());
}
return l;
}
/**
* Creates an explicit access to a <code>this</code> variable (of the form
* <code>type.this</code>).
*
* @param <T>
* the actual type of <code>this</code>
* @param type
* the reference to the type that holds the <code>this</code>
* variable
* @return a <code>type.this</code> expression
*/
public <T> CtThisAccess<T> createThisAccess(CtTypeReference<T> type) {
return createThisAccess(type, false);
}
/**
* Creates an access to a <code>this</code> variable (of the form
* <code>type.this</code>).
*
* @param <T>
* the actual type of <code>this</code>
* @param type
* the reference to the type that holds the <code>this</code>
* variable
* @param isImplicit
* type of the this access is implicit or not.
* @return a <code>type.this</code> expression
*/
public <T> CtThisAccess<T> createThisAccess(CtTypeReference<T> type, boolean isImplicit) {
CtThisAccess<T> thisAccess = factory.Core().<T>createThisAccess();
thisAccess.setImplicit(isImplicit);
thisAccess.setType(type);
CtTypeAccess<T> typeAccess = factory.Code().createTypeAccess(type);
thisAccess.setTarget(typeAccess);
return thisAccess;
}
/**
* Creates a variable access.
*/
public <T> CtVariableAccess<T> createVariableRead(CtVariableReference<T> variable, boolean isStatic) {
CtVariableAccess<T> va;
if (variable instanceof CtFieldReference) {
va = factory.Core().createFieldRead();
// creates a this target for non-static fields to avoid name conflicts...
if (!isStatic) {
((CtFieldAccess<T>) va).setTarget(createThisAccess(((CtFieldReference<T>) variable).getDeclaringType()));
}
} else {
va = factory.Core().createVariableRead();
}
return va.setVariable(variable);
}
/**
* Creates a list of variable accesses.
*
* @param variables
* the variables to be accessed
*/
public List<CtExpression<?>> createVariableReads(List<? extends CtVariable<?>> variables) {
List<CtExpression<?>> result = new ArrayList<>(variables.size());
for (CtVariable<?> v : variables) {
result.add(createVariableRead(v.getReference(), v.getModifiers().contains(ModifierKind.STATIC)));
}
return result;
}
/**
* Creates a variable assignment (can be an expression or a statement).
*
* @param <T>
* the type of the assigned variable
* @param variable
* a reference to the assigned variable
* @param isStatic
* tells if the assigned variable is static or not
* @param expression
* the assigned expression
* @return a variable assignment
*/
public <A, T extends A> CtAssignment<A, T> createVariableAssignment(CtVariableReference<A> variable, boolean isStatic, CtExpression<T> expression) {
CtVariableAccess<A> vaccess = createVariableRead(variable, isStatic);
return factory.Core().<A, T>createAssignment().<CtAssignment<A, T>>setAssignment(expression).setAssigned(vaccess);
}
/**
* Creates a list of statements that contains the assignments of a set of
* variables.
*
* @param variables
* the variables to be assigned
* @param expressions
* the assigned expressions
* @return a list of variable assignments
*/
public <T> CtStatementList createVariableAssignments(List<? extends CtVariable<T>> variables, List<? extends CtExpression<T>> expressions) {
CtStatementList result = factory.Core().createStatementList();
for (int i = 0; i < variables.size(); i++) {
result.addStatement(createVariableAssignment(variables.get(i).getReference(), variables.get(i).getModifiers().contains(ModifierKind.STATIC), expressions.get(i)));
}
return result;
}
/**
* Creates a field.
*
* @param name
* Name of the field.
* @param type
* Type of the field.
* @param exp
* Default expression of the field.
* @param visibilities
* All visibilities of the field.
* @param <T>
* Generic type for the type of the field.
* @return a field
*/
public <T> CtField<T> createCtField(String name, CtTypeReference<T> type, String exp, ModifierKind... visibilities) {
return factory.Core().createField().<CtField<T>>setModifiers(modifiers(visibilities)).<CtField<T>>setSimpleName(name).<CtField<T>>setType(type)
.setDefaultExpression(this.<T>createCodeSnippetExpression(exp));
}
/**
* Creates a block.
*
* @param element
* Statement of the block.
* @param <T>
* Subclasses of CtStatement.
* @return a block.
*/
public <T extends CtStatement> CtBlock<?> createCtBlock(T element) {
return factory.Core().createBlock().addStatement(element);
}
/**
* Accepts instance of CtStatement or CtBlock.
* If element is CtStatement, then it creates wrapping CtBlock, which contains the element
* If element is CtBlock, then it directly returns that element
* If element is null, then it returns null.
* note: It must not create empty CtBlock - as expected in CtCatch, CtExecutable, CtLoop and CtTry setBody implementations
* @param element
* @return CtBlock instance
*/
public <T extends CtStatement> CtBlock<?> getOrCreateCtBlock(T element) {
if (element == null) {
return null;
}
if (element instanceof CtBlock<?>) {
return (CtBlock<?>) element;
}
return this.createCtBlock(element);
}
/**
* Creates a throw.
*
* @param thrownExp
* Expression of the throw.
* @return a throw.
*/
public CtThrow createCtThrow(String thrownExp) {
return factory.Core().createThrow().setThrownExpression(this.<Throwable>createCodeSnippetExpression(thrownExp));
}
/**
* Creates a catch element.
*
* @param nameCatch
* Name of the variable in the catch.
* @param exception
* Type of the exception.
* @param ctBlock
* Content of the catch.
* @return a catch.
*/
public CtCatch createCtCatch(String nameCatch, Class<? extends Throwable> exception, CtBlock<?> ctBlock) {
final CtCatchVariable<Throwable> catchVariable = factory.Core().<Throwable>createCatchVariable().<CtCatchVariable<Throwable>>setType(this.<Throwable>createCtTypeReference(exception))
.setSimpleName(nameCatch);
return factory.Core().createCatch().setParameter(catchVariable).setBody(ctBlock);
}
/**
* Creates a type reference.
*
* @param originalClass
* Original class of the reference.
* @param <T>
* Type of the reference.
* @return a type reference.
*/
public <T> CtTypeReference<T> createCtTypeReference(Class<?> originalClass) {
if (originalClass == null) {
return null;
}
CtTypeReference<T> typeReference = factory.Core().<T>createTypeReference();
typeReference.setSimpleName(originalClass.getSimpleName());
if (originalClass.isPrimitive()) {
return typeReference;
}
if (originalClass.getDeclaringClass() != null) {
// the inner class reference does not have package
return typeReference.setDeclaringType(createCtTypeReference(originalClass.getDeclaringClass()));
}
return typeReference.setPackage(createCtPackageReference(originalClass.getPackage()));
}
/**
* Creates a package reference.
*
* @param originalPackage
* Original package of the reference.
* @return a package reference.
*/
public CtPackageReference createCtPackageReference(Package originalPackage) {
return factory.Core().createPackageReference().setSimpleName(originalPackage.getName());
}
/**
* Creates an annotation.
*
* @param annotationType
* Type of the annotation.
* @return an annotation.
*/
public <A extends Annotation> CtAnnotation<A> createAnnotation(CtTypeReference<A> annotationType) {
final CtAnnotation<A> a = factory.Core().createAnnotation();
a.setAnnotationType(annotationType);
return a;
}
/**
* Gets a list of references from a list of elements.
*
* @param <R>
* the expected reference type
* @param <E>
* the element type
* @param elements
* the element list
* @return the corresponding list of references
*/
@SuppressWarnings("unchecked")
public <R extends CtReference, E extends CtNamedElement> List<R> getReferences(List<E> elements) {
List<R> refs = new ArrayList<>(elements.size());
for (E e : elements) {
refs.add((R) e.getReference());
}
return refs;
}
/**
* Creates a modifier set.
*
* @param modifiers
* to put in set
* @return Set of given modifiers
*/
public Set<ModifierKind> modifiers(ModifierKind... modifiers) {
Set<ModifierKind> ret = EnumSet.noneOf(ModifierKind.class);
Collections.addAll(ret, modifiers);
return ret;
}
/**
* Creates a Code Snippet expression.
*
* @param <T>
* The type of the expression represented by the CodeSnippet
* @param expression
* The string that contains the expression.
* @return a new CtCodeSnippetExpression.
*/
public <T> CtCodeSnippetExpression<T> createCodeSnippetExpression(String expression) {
CtCodeSnippetExpression<T> e = factory.Core().createCodeSnippetExpression();
e.setValue(expression);
return e;
}
/**
* Creates a Code Snippet statement.
*
* @param statement
* The String containing the statement.
* @return a new CtCodeSnippetStatement
*/
public CtCodeSnippetStatement createCodeSnippetStatement(String statement) {
CtCodeSnippetStatement e = factory.Core().createCodeSnippetStatement();
e.setValue(statement);
return e;
}
/**
* Creates a comment
*
* @param content The content of the comment
* @param type The comment type
* @return a new CtComment
*/
public CtComment createComment(String content, CtComment.CommentType type) {
if (type == CtComment.CommentType.JAVADOC) {
return factory.Core().createJavaDoc().setContent(content);
}
return factory.Core().createComment().setContent(content).setCommentType(type);
}
/**
* Creates an inline comment
*
* @param content The content of the comment
* @return a new CtComment
*/
public CtComment createInlineComment(String content) {
if (content.contains(CtComment.LINE_SEPARATOR)) {
throw new SpoonException("The content of your comment contain at least one line separator. "
+ "Please consider using a block comment by calling createComment(\"your content\", CtComment.CommentType.BLOCK).");
}
return createComment(content, CtComment.CommentType.INLINE);
}
/**
* Creates a javadoc tag
*
* @param content The content of the javadoc tag with a possible paramater
* @param type The tag type
* @return a new CtJavaDocTag
*/
public CtJavaDocTag createJavaDocTag(String content, CtJavaDocTag.TagType type) {
if (content == null) {
content = "";
}
CtJavaDocTag docTag = factory.Core().createJavaDocTag();
if (type != null && type.hasParam()) {
int firstWord = content.indexOf(' ');
int firstLine = content.indexOf('\n');
if (firstLine < firstWord && firstLine >= 0) {
firstWord = firstLine;
}
if (firstWord == -1) {
firstWord = content.length();
}
String param = content.substring(0, firstWord);
content = content.substring(firstWord);
docTag.setParam(param);
}
return docTag.setContent(content.trim()).setType(type);
}
}