/*******************************************************************************
* Copyright (c) 2000, 2009 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.wst.jsdt.core.dom;
import org.eclipse.wst.jsdt.core.IJavaScriptElement;
import org.eclipse.wst.jsdt.core.IType;
import org.eclipse.wst.jsdt.internal.compiler.lookup.CompilationUnitScope;
import org.eclipse.wst.jsdt.internal.compiler.lookup.FieldBinding;
import org.eclipse.wst.jsdt.internal.compiler.lookup.LocalVariableBinding;
import org.eclipse.wst.jsdt.internal.compiler.lookup.TagBits;
import org.eclipse.wst.jsdt.internal.core.JavaElement;
import org.eclipse.wst.jsdt.internal.core.LocalVariable;
/**
* 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.wst.jsdt.internal.compiler.lookup.VariableBinding binding;
private ITypeBinding declaringClass;
private String key;
private String name;
private BindingResolver resolver;
private ITypeBinding type;
VariableBinding(BindingResolver resolver, org.eclipse.wst.jsdt.internal.compiler.lookup.VariableBinding binding) {
this.resolver = resolver;
this.binding = binding;
}
/* (non-Javadoc)
* @see IVariableBinding#getConstantValue()
*
*/
public Object getConstantValue() {
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 IFunctionBinding getDeclaringMethod() {
if (!isField()) {
ASTNode node = this.resolver.findDeclaringNode(this);
while (true) {
if (node == null) break;
switch(node.getNodeType()) {
case ASTNode.INITIALIZER :
return null;
case ASTNode.FUNCTION_DECLARATION :
FunctionDeclaration methodDeclaration = (FunctionDeclaration) node;
return methodDeclaration.resolveBinding();
default:
node = node.getParent();
}
}
}
return null;
}
/*
* @see IBinding#getJavaElement()
*/
public IJavaScriptElement 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;
}
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 (isField()) {
// field
FieldBinding fieldBinding = (FieldBinding) this.binding;
if (fieldBinding.declaringClass == null) return null; // arraylength
IType declaringType = (IType) getDeclaringClass().getJavaElement();
if (declaringType == null) return null;
return (JavaElement) declaringType.getField(getName());
}
// local variable
IFunctionBinding declaringMethod = getDeclaringMethod();
if (declaringMethod == null) return null;
JavaElement method = (JavaElement) declaringMethod.getJavaElement();
if (!(this.resolver instanceof DefaultBindingResolver)) return null;
VariableDeclaration localVar = (VariableDeclaration) ((DefaultBindingResolver) this.resolver).bindingsToAstNodes.get(this);
if (localVar == null) return null;
int nameStart;
int nameLength;
int sourceStart;
int sourceLength;
if (localVar instanceof SingleVariableDeclaration) {
sourceStart = localVar.getStartPosition();
sourceLength = localVar.getLength();
SimpleName simpleName = ((SingleVariableDeclaration) localVar).getName();
nameStart = simpleName.getStartPosition();
nameLength = simpleName.getLength();
} else {
nameStart = localVar.getStartPosition();
nameLength = localVar.getLength();
ASTNode node = localVar.getParent();
sourceStart = node.getStartPosition();
sourceLength = node.getLength();
}
char[] typeSig = this.binding.type.signature();
return new LocalVariable(method, localVar.getName().getIdentifier(), sourceStart, sourceStart+sourceLength-1, nameStart, nameStart+nameLength-1, new String(typeSig));
}
/*
* @see IVariableBinding#getVariableDeclaration()
*
*/
public IVariableBinding getVariableDeclaration() {
if (this.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 IBinding#isEqualTo(Binding)
*
*/
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.wst.jsdt.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)) {
IFunctionBinding declaringMethod = this.getDeclaringMethod();
IFunctionBinding 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;
}
public boolean isGlobal()
{
return this.binding instanceof LocalVariableBinding && ((LocalVariableBinding)this.binding).declaringScope instanceof CompilationUnitScope;
}
/*
* (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();
}
}