/*******************************************************************************
* Copyright (c) 2000, 2008 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.internal.compiler.ast;
import org.eclipse.wst.jsdt.core.ast.IASTNode;
import org.eclipse.wst.jsdt.core.ast.IThisReference;
import org.eclipse.wst.jsdt.internal.compiler.ASTVisitor;
import org.eclipse.wst.jsdt.internal.compiler.flow.FlowContext;
import org.eclipse.wst.jsdt.internal.compiler.flow.FlowInfo;
import org.eclipse.wst.jsdt.internal.compiler.impl.Constant;
import org.eclipse.wst.jsdt.internal.compiler.lookup.Binding;
import org.eclipse.wst.jsdt.internal.compiler.lookup.BlockScope;
import org.eclipse.wst.jsdt.internal.compiler.lookup.ClassScope;
import org.eclipse.wst.jsdt.internal.compiler.lookup.MethodScope;
import org.eclipse.wst.jsdt.internal.compiler.lookup.TypeBinding;
public class ThisReference extends Reference implements IThisReference {
public static ThisReference implicitThis(){
ThisReference implicitThis = new ThisReference(0, 0);
implicitThis.bits |= IsImplicitThis;
return implicitThis;
}
public ThisReference(int sourceStart, int sourceEnd) {
this.sourceStart = sourceStart;
this.sourceEnd = sourceEnd;
}
/*
* @see Reference#analyseAssignment(...)
*/
public FlowInfo analyseAssignment(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo, Assignment assignment, boolean isCompound) {
return flowInfo; // this cannot be assigned
}
public boolean checkAccess(MethodScope methodScope) {
// this/super cannot be used in constructor call
// if (methodScope!=null && methodScope.isConstructorCall) {
// methodScope.problemReporter().fieldsOrThisBeforeConstructorInvocation(this);
// return false;
// }
// static may not refer to this/super
// if (methodScope!=null && methodScope.isStatic) {
// methodScope.problemReporter().errorThisSuperInStatic(this);
// return false;
// }
return true;
}
public boolean isImplicitThis() {
return (this.bits & IsImplicitThis) != 0;
}
public boolean isThis() {
return true ;
}
public int nullStatus(FlowInfo flowInfo) {
return FlowInfo.NON_NULL;
}
public StringBuffer printExpression(int indent, StringBuffer output){
if (this.isImplicitThis()) return output;
return output.append("this"); //$NON-NLS-1$
}
public TypeBinding resolveType(BlockScope scope) {
constant = Constant.NotAConstant;
if (!this.isImplicitThis() &&!checkAccess(scope.methodScope())) {
return null;
}
MethodScope methodScope = scope.methodScope();
if (methodScope!=null && methodScope.isStatic)
bits |= Binding.TYPE;
return this.resolvedType = scope.enclosingReceiverType();
}
public void traverse(ASTVisitor visitor, BlockScope blockScope) {
visitor.visit(this, blockScope);
visitor.endVisit(this, blockScope);
}
public void traverse(ASTVisitor visitor, ClassScope blockScope) {
visitor.visit(this, blockScope);
visitor.endVisit(this, blockScope);
}
public int getASTType() {
return IASTNode.THIS_REFERENCE;
}
}