/*******************************************************************************
* Copyright (c) 2000, 2010 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jdt.core.dom;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.util.IModifierConstants;
import org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration;
import org.eclipse.jdt.internal.compiler.ast.Initializer;
import org.eclipse.jdt.internal.compiler.ast.TypeDeclaration;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
import org.eclipse.jdt.internal.compiler.impl.Constant;
import org.eclipse.jdt.internal.compiler.impl.ReferenceContext;
import org.eclipse.jdt.internal.compiler.lookup.BlockScope;
import org.eclipse.jdt.internal.compiler.lookup.FieldBinding;
import org.eclipse.jdt.internal.compiler.lookup.LocalVariableBinding;
import org.eclipse.jdt.internal.compiler.lookup.TagBits;
import org.eclipse.jdt.internal.compiler.lookup.TypeIds;
import org.eclipse.jdt.internal.core.JavaElement;
import org.eclipse.jdt.internal.core.LocalVariable;
import org.eclipse.jdt.internal.core.util.Util;
/**
* Internal implementation of variable bindings.
*/
class VariableBinding implements IVariableBinding {
private static final int VALID_MODIFIERS = Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE |
Modifier.STATIC | Modifier.FINAL | Modifier.TRANSIENT | Modifier.VOLATILE;
private org.eclipse.jdt.internal.compiler.lookup.VariableBinding binding;
private ITypeBinding declaringClass;
private String key;
private String name;
private BindingResolver resolver;
private ITypeBinding type;
private IAnnotationBinding[] annotations;
VariableBinding(BindingResolver resolver, org.eclipse.jdt.internal.compiler.lookup.VariableBinding binding) {
this.resolver = resolver;
this.binding = binding;
}
public IAnnotationBinding[] getAnnotations() {
if (this.annotations != null) {
return this.annotations;
}
org.eclipse.jdt.internal.compiler.lookup.AnnotationBinding[] internalAnnotations = this.binding.getAnnotations();
int length = internalAnnotations == null ? 0 : internalAnnotations.length;
if (length != 0) {
IAnnotationBinding[] tempAnnotations = new IAnnotationBinding[length];
int convertedAnnotationCount = 0;
for (int i = 0; i < length; i++) {
org.eclipse.jdt.internal.compiler.lookup.AnnotationBinding internalAnnotation = internalAnnotations[i];
final IAnnotationBinding annotationInstance = this.resolver.getAnnotationInstance(internalAnnotation);
if (annotationInstance == null) {
continue;
}
tempAnnotations[convertedAnnotationCount++] = annotationInstance;
}
if (convertedAnnotationCount != length) {
if (convertedAnnotationCount == 0) {
return this.annotations = AnnotationBinding.NoAnnotations;
}
System.arraycopy(tempAnnotations, 0, (tempAnnotations = new IAnnotationBinding[convertedAnnotationCount]), 0, convertedAnnotationCount);
}
return this.annotations = tempAnnotations;
}
return this.annotations = AnnotationBinding.NoAnnotations;
}
/* (non-Javadoc)
* @see IVariableBinding#getConstantValue()
* @since 3.0
*/
public Object getConstantValue() {
Constant c = this.binding.constant();
if (c == null || c == Constant.NotAConstant) return null;
switch (c.typeID()) {
case TypeIds.T_boolean:
return Boolean.valueOf(c.booleanValue());
case TypeIds.T_byte:
return new Byte(c.byteValue());
case TypeIds.T_char:
return new Character(c.charValue());
case TypeIds.T_double:
return new Double(c.doubleValue());
case TypeIds.T_float:
return new Float(c.floatValue());
case TypeIds.T_int:
return new Integer(c.intValue());
case TypeIds.T_long:
return new Long(c.longValue());
case TypeIds.T_short:
return new Short(c.shortValue());
case TypeIds.T_JavaLangString:
return c.stringValue();
}
return null;
}
/*
* @see IVariableBinding#getDeclaringClass()
*/
public ITypeBinding getDeclaringClass() {
if (isField()) {
if (this.declaringClass == null) {
FieldBinding fieldBinding = (FieldBinding) this.binding;
this.declaringClass = this.resolver.getTypeBinding(fieldBinding.declaringClass);
}
return this.declaringClass;
} else {
return null;
}
}
/*
* @see IVariableBinding#getDeclaringMethod()
*/
public IMethodBinding getDeclaringMethod() {
if (!isField()) {
ASTNode node = this.resolver.findDeclaringNode(this);
while (true) {
if (node == null) {
if (this.binding instanceof LocalVariableBinding) {
LocalVariableBinding localVariableBinding = (LocalVariableBinding) this.binding;
BlockScope blockScope = localVariableBinding.declaringScope;
if (blockScope != null) {
ReferenceContext referenceContext = blockScope.referenceContext();
if (referenceContext instanceof Initializer) {
return null;
}
if (referenceContext instanceof AbstractMethodDeclaration) {
return this.resolver.getMethodBinding(((AbstractMethodDeclaration) referenceContext).binding);
}
}
}
return null;
}
switch(node.getNodeType()) {
case ASTNode.INITIALIZER :
return null;
case ASTNode.METHOD_DECLARATION :
MethodDeclaration methodDeclaration = (MethodDeclaration) node;
return methodDeclaration.resolveBinding();
default:
node = node.getParent();
}
}
}
return null;
}
/*
* @see IBinding#getJavaElement()
*/
public IJavaElement getJavaElement() {
JavaElement element = getUnresolvedJavaElement();
if (element == null)
return null;
return element.resolved(this.binding);
}
/*
* @see IBinding#getKey()
*/
public String getKey() {
if (this.key == null) {
this.key = new String(this.binding.computeUniqueKey());
}
return this.key;
}
/*
* @see IBinding#getKind()
*/
public int getKind() {
return IBinding.VARIABLE;
}
/*
* @see IBinding#getModifiers()
*/
public int getModifiers() {
if (isField()) {
return ((FieldBinding) this.binding).getAccessFlags() & VALID_MODIFIERS;
}
if (this.binding.isFinal()) {
return IModifierConstants.ACC_FINAL;
}
return Modifier.NONE;
}
/*
* @see IBinding#getName()
*/
public String getName() {
if (this.name == null) {
this.name = new String(this.binding.name);
}
return this.name;
}
/*
* @see IVariableBinding#getType()
*/
public ITypeBinding getType() {
if (this.type == null) {
this.type = this.resolver.getTypeBinding(this.binding.type);
}
return this.type;
}
private JavaElement getUnresolvedJavaElement() {
if (JavaCore.getPlugin() == null) {
return null;
}
if (isField()) {
if (this.resolver instanceof DefaultBindingResolver) {
DefaultBindingResolver defaultBindingResolver = (DefaultBindingResolver) this.resolver;
if (!defaultBindingResolver.fromJavaProject) return null;
return Util.getUnresolvedJavaElement(
(FieldBinding) this.binding,
defaultBindingResolver.workingCopyOwner,
defaultBindingResolver.getBindingsToNodesMap());
}
return null;
}
// local variable
if (!(this.resolver instanceof DefaultBindingResolver)) return null;
DefaultBindingResolver defaultBindingResolver = (DefaultBindingResolver) this.resolver;
if (!defaultBindingResolver.fromJavaProject) return null;
VariableDeclaration localVar = (VariableDeclaration) defaultBindingResolver.bindingsToAstNodes.get(this);
if (localVar == null) return null;
int nameStart;
int nameLength;
int sourceStart;
int sourceLength;
int modifiers = 0;
if (localVar instanceof SingleVariableDeclaration) {
sourceStart = localVar.getStartPosition();
sourceLength = localVar.getLength();
final SingleVariableDeclaration singleVariableDeclaration = (SingleVariableDeclaration) localVar;
SimpleName simpleName = singleVariableDeclaration.getName();
nameStart = simpleName.getStartPosition();
nameLength = simpleName.getLength();
modifiers = singleVariableDeclaration.getModifiers();
} else {
nameStart = localVar.getStartPosition();
nameLength = localVar.getLength();
ASTNode node = localVar.getParent();
sourceStart = node.getStartPosition();
sourceLength = node.getLength();
VariableDeclarationFragment fragment = (VariableDeclarationFragment) localVar;
final ASTNode parent = fragment.getParent();
switch (parent.getNodeType()) {
case ASTNode.VARIABLE_DECLARATION_EXPRESSION :
VariableDeclarationExpression expression = (VariableDeclarationExpression) parent;
modifiers = expression.getModifiers();
break;
case ASTNode.VARIABLE_DECLARATION_STATEMENT :
VariableDeclarationStatement statement = (VariableDeclarationStatement) parent;
modifiers = statement.getModifiers();
break;
case ASTNode.FIELD_DECLARATION :
FieldDeclaration fieldDeclaration = (FieldDeclaration) parent;
modifiers = fieldDeclaration.getModifiers();
break;
}
}
int sourceEnd = sourceStart+sourceLength-1;
char[] typeSig = this.binding.type.genericTypeSignature();
JavaElement parent = null;
IMethodBinding declaringMethod = getDeclaringMethod();
final LocalVariableBinding localVariableBinding = (LocalVariableBinding) this.binding;
if (declaringMethod == null) {
ReferenceContext referenceContext = localVariableBinding.declaringScope.referenceContext();
if (referenceContext instanceof TypeDeclaration){
// Local variable is declared inside an initializer
TypeDeclaration typeDeclaration = (TypeDeclaration) referenceContext;
JavaElement typeHandle = null;
typeHandle = Util.getUnresolvedJavaElement(
typeDeclaration.binding,
defaultBindingResolver.workingCopyOwner,
defaultBindingResolver.getBindingsToNodesMap());
parent = Util.getUnresolvedJavaElement(sourceStart, sourceEnd, typeHandle);
} else {
return null;
}
} else {
parent = (JavaElement) declaringMethod.getJavaElement();
}
if (parent == null) return null;
return new LocalVariable(
parent,
localVar.getName().getIdentifier(),
sourceStart,
sourceEnd,
nameStart,
nameStart+nameLength-1,
new String(typeSig),
localVariableBinding.declaration.annotations,
modifiers,
(localVariableBinding.tagBits & TagBits.IsArgument) != 0);
}
/*
* @see IVariableBinding#getVariableDeclaration()
* @since 3.1
*/
public IVariableBinding getVariableDeclaration() {
if (isField()) {
FieldBinding fieldBinding = (FieldBinding) this.binding;
return this.resolver.getVariableBinding(fieldBinding.original());
}
return this;
}
/*
* @see IVariableBinding#getVariableId()
*/
public int getVariableId() {
return this.binding.id;
}
/*
* @see IVariableBinding#isParameter()
*/
public boolean isParameter() {
return (this.binding.tagBits & TagBits.IsArgument) != 0;
}
/*
* @see IBinding#isDeprecated()
*/
public boolean isDeprecated() {
if (isField()) {
return ((FieldBinding) this.binding).isDeprecated();
}
return false;
}
/*
* @see IVariableBinding#isEnumConstant()
* @since 3.1
*/
public boolean isEnumConstant() {
return (this.binding.modifiers & ClassFileConstants.AccEnum) != 0;
}
/*
* @see IBinding#isEqualTo(Binding)
* @since 3.1
*/
public boolean isEqualTo(IBinding other) {
if (other == this) {
// identical binding - equal (key or no key)
return true;
}
if (other == null) {
// other binding missing
return false;
}
if (!(other instanceof VariableBinding)) {
return false;
}
org.eclipse.jdt.internal.compiler.lookup.VariableBinding otherBinding = ((VariableBinding) other).binding;
if (this.binding instanceof FieldBinding) {
if (otherBinding instanceof FieldBinding) {
return BindingComparator.isEqual((FieldBinding) this.binding, (FieldBinding) otherBinding);
} else {
return false;
}
} else {
if (BindingComparator.isEqual(this.binding, otherBinding)) {
IMethodBinding declaringMethod = getDeclaringMethod();
IMethodBinding otherDeclaringMethod = ((VariableBinding) other).getDeclaringMethod();
if (declaringMethod == null) {
if (otherDeclaringMethod != null) {
return false;
}
return true;
}
return declaringMethod.isEqualTo(otherDeclaringMethod);
}
return false;
}
}
/*
* @see IVariableBinding#isField()
*/
public boolean isField() {
return this.binding instanceof FieldBinding;
}
/*
* @see IBinding#isSynthetic()
*/
public boolean isSynthetic() {
if (isField()) {
return ((FieldBinding) this.binding).isSynthetic();
}
return false;
}
/*
* (non-Javadoc)
* @see org.eclipse.jdt.core.dom.IBinding#isRecovered()
*/
public boolean isRecovered() {
return false;
}
/*
* For debugging purpose only.
* @see java.lang.Object#toString()
*/
public String toString() {
return this.binding.toString();
}
}