| /******************************************************************************* |
| * 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.IQualifiedThisReference; |
| 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.BlockScope; |
| import org.eclipse.wst.jsdt.internal.compiler.lookup.ClassScope; |
| import org.eclipse.wst.jsdt.internal.compiler.lookup.ReferenceBinding; |
| import org.eclipse.wst.jsdt.internal.compiler.lookup.TypeBinding; |
| |
| public class QualifiedThisReference extends ThisReference implements IQualifiedThisReference { |
| |
| public TypeReference qualification; |
| ReferenceBinding currentCompatibleType; |
| |
| public QualifiedThisReference(TypeReference name, int sourceStart, int sourceEnd) { |
| super(sourceStart, sourceEnd); |
| qualification = name; |
| name.bits |= IgnoreRawTypeCheck; // no need to worry about raw type usage |
| this.sourceStart = name.sourceStart; |
| } |
| |
| public FlowInfo analyseCode( |
| BlockScope currentScope, |
| FlowContext flowContext, |
| FlowInfo flowInfo) { |
| |
| return flowInfo; |
| } |
| |
| public FlowInfo analyseCode( |
| BlockScope currentScope, |
| FlowContext flowContext, |
| FlowInfo flowInfo, |
| boolean valueRequired) { |
| |
| return flowInfo; |
| } |
| |
| public TypeBinding resolveType(BlockScope scope) { |
| |
| constant = Constant.NotAConstant; |
| // X.this is not a param/raw type as denoting enclosing instance |
| TypeBinding type = this.qualification.resolveType(scope, true /* check bounds*/); |
| if (type == null) return null; |
| // X.this is not a param/raw type as denoting enclosing instance |
| type = type.erasure(); |
| |
| // resolvedType needs to be converted to parameterized |
| if (type instanceof ReferenceBinding) { |
| this.resolvedType = scope.environment().convertToParameterizedType((ReferenceBinding) type); |
| } else { |
| // error case |
| this.resolvedType = type; |
| } |
| |
| // the qualification MUST exactly match some enclosing type name |
| // It is possible to qualify 'this' by the name of the current class |
| int depth = 0; |
| this.currentCompatibleType = scope.referenceType().binding; |
| while (this.currentCompatibleType != null && this.currentCompatibleType != type) { |
| depth++; |
| this.currentCompatibleType = this.currentCompatibleType.isStatic() ? null : this.currentCompatibleType.enclosingType(); |
| } |
| bits &= ~DepthMASK; // flush previous depth if any |
| bits |= (depth & 0xFF) << DepthSHIFT; // encoded depth into 8 bits |
| |
| if (this.currentCompatibleType == null) { |
| scope.problemReporter().noSuchEnclosingInstance(type, this, false); |
| return this.resolvedType; |
| } |
| |
| // Ensure one cannot write code like: B() { super(B.this); } |
| if (depth == 0) { |
| checkAccess(scope.methodScope()); |
| } // if depth>0, path emulation will diagnose bad scenarii |
| |
| return this.resolvedType; |
| } |
| |
| public StringBuffer printExpression(int indent, StringBuffer output) { |
| |
| return qualification.print(0, output).append(".this"); //$NON-NLS-1$ |
| } |
| |
| public void traverse( |
| ASTVisitor visitor, |
| BlockScope blockScope) { |
| |
| if (visitor.visit(this, blockScope)) { |
| qualification.traverse(visitor, blockScope); |
| } |
| visitor.endVisit(this, blockScope); |
| } |
| |
| public void traverse( |
| ASTVisitor visitor, |
| ClassScope blockScope) { |
| |
| if (visitor.visit(this, blockScope)) { |
| qualification.traverse(visitor, blockScope); |
| } |
| visitor.endVisit(this, blockScope); |
| } |
| public int getASTType() { |
| return IASTNode.QUALIFIED_THIS_REFERENCE; |
| |
| } |
| } |