| /******************************************************************************* |
| * Copyright (c) 2000, 2004 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.internal.compiler.ast; |
| |
| import org.eclipse.jdt.internal.compiler.ASTVisitor; |
| import org.eclipse.jdt.internal.compiler.codegen.*; |
| import org.eclipse.jdt.internal.compiler.flow.*; |
| import org.eclipse.jdt.internal.compiler.lookup.*; |
| |
| public class QualifiedThisReference extends ThisReference { |
| |
| public TypeReference qualification; |
| ReferenceBinding currentCompatibleType; |
| |
| public QualifiedThisReference(TypeReference name, int sourceStart, int sourceEnd) { |
| super(sourceStart, sourceEnd); |
| qualification = name; |
| 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; |
| } |
| |
| /** |
| * Code generation for QualifiedThisReference |
| * |
| * @param currentScope org.eclipse.jdt.internal.compiler.lookup.BlockScope |
| * @param codeStream org.eclipse.jdt.internal.compiler.codegen.CodeStream |
| * @param valueRequired boolean |
| */ |
| public void generateCode( |
| BlockScope currentScope, |
| CodeStream codeStream, |
| boolean valueRequired) { |
| |
| int pc = codeStream.position; |
| if (valueRequired) { |
| if ((bits & DepthMASK) != 0) { |
| Object[] emulationPath = |
| currentScope.getEmulationPath(this.currentCompatibleType, true /*only exact match*/, false/*consider enclosing arg*/); |
| codeStream.generateOuterAccess(emulationPath, this, this.currentCompatibleType, currentScope); |
| } else { |
| // nothing particular after all |
| codeStream.aload_0(); |
| } |
| } |
| codeStream.recordPositionsFrom(pc, this.sourceStart); |
| } |
| |
| public TypeBinding resolveType(BlockScope scope) { |
| |
| constant = NotAConstant; |
| TypeBinding type = this.resolvedType = this.qualification.resolveType(scope, true /* check bounds*/); |
| if (type == null) return null; |
| // X.this is not a raw type as denoting enclosing instance |
| if (type.isRawType()) { |
| RawTypeBinding rawType = (RawTypeBinding) type; |
| type = this.resolvedType = rawType.type; // unwrap |
| } |
| // the qualification MUST exactly match some enclosing type name |
| // Its 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 type; |
| } |
| |
| // 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 type; |
| } |
| |
| 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); |
| } |
| } |