| /******************************************************************************* |
| * Copyright (c) 2000, 2016 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| * Fraunhofer FIRST - extended API and implementation |
| * Technical University Berlin - extended API and implementation |
| * Stephan Herrmann - Contribution for |
| * bug 382350 - [1.8][compiler] Unable to invoke inherited default method via I.super.m() syntax |
| * bug 404649 - [1.8][compiler] detect illegal reference to indirect or redundant super |
| * Jesper S Moller <jesper@selskabet.org> - Contributions for |
| * bug 378674 - "The method can be declared as static" is wrong |
| *******************************************************************************/ |
| 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.impl.Constant; |
| import org.eclipse.jdt.internal.compiler.lookup.*; |
| import org.eclipse.objectteams.otdt.internal.core.compiler.util.RoleTypeCreator; |
| |
| /** |
| * OTDT changes: |
| * |
| * What: If qualification is a role, use the class part. |
| * Why: Only the class contains nested roles. |
| * |
| * What: Qualified this within a static role method requires two tricks. |
| * Where: |
| * + AbstractMethodDeclaration.generateCode() generates 2 synthetic arguments, |
| * to ensure that aload_1 will fetch the enclosing team instance |
| * similar to constructors of regular inner classes. |
| * + BlockScope.getEmulationPath() finds the synthetic argument as the |
| * implementation of this reference. |
| * |
| * @version $Id: QualifiedThisReference.java 23404 2010-02-03 14:10:22Z stephan $ |
| */ |
| public class QualifiedThisReference extends ThisReference { |
| |
| public TypeReference qualification; |
| //{ObjectTeams: accessible for sub-class: |
| protected |
| // SH} |
| ReferenceBinding currentCompatibleType; |
| |
| public QualifiedThisReference(TypeReference name, int sourceStart, int sourceEnd) { |
| super(sourceStart, sourceEnd); |
| this.qualification = name; |
| name.bits |= IgnoreRawTypeCheck; // no need to worry about raw type usage |
| this.sourceStart = name.sourceStart; |
| } |
| |
| @Override |
| public FlowInfo analyseCode( |
| BlockScope currentScope, |
| FlowContext flowContext, |
| FlowInfo flowInfo) { |
| |
| return flowInfo; |
| } |
| |
| @Override |
| 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 |
| */ |
| @Override |
| public void generateCode( |
| BlockScope currentScope, |
| CodeStream codeStream, |
| boolean valueRequired) { |
| |
| int pc = codeStream.position; |
| if (valueRequired) { |
| if ((this.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); |
| } |
| |
| @Override |
| public TypeBinding resolveType(BlockScope scope) { |
| |
| this.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 || !type.isValidBinding()) 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; |
| } |
| |
| //{ObjectTeams: redirect to the class part of a role: |
| if (((ReferenceBinding)this.resolvedType).isDirectRole()) |
| this.resolvedType = |
| type = |
| ((ReferenceBinding)this.resolvedType).roleModel.getClassPartBinding(); |
| // SH} |
| |
| // the qualification MUST exactly match some enclosing type name |
| // It is possible to qualify 'this' by the name of the current class |
| //{ObjectTeams: use class part to avoid roles to be reported as static: |
| /* orig: |
| int depth = findCompatibleEnclosing(scope.referenceType().binding, type, scope); |
| :giro */ |
| int depth = findCompatibleEnclosing(scope.referenceType().binding.getRealClass(), type, scope); |
| // SH} |
| this.bits &= ~DepthMASK; // flush previous depth if any |
| this.bits |= (depth & 0xFF) << DepthSHIFT; // encoded depth into 8 bits |
| |
| if (this.currentCompatibleType == null) { |
| if (this.resolvedType.isValidBinding()) |
| scope.problemReporter().noSuchEnclosingInstance(type, this, false); |
| // otherwise problem will be reported by the caller |
| return this.resolvedType; |
| } else { |
| scope.tagAsAccessingEnclosingInstanceStateOf(this.currentCompatibleType, false /* type variable access */); |
| } |
| |
| // Ensure one cannot write code like: B() { super(B.this); } |
| if (depth == 0) { |
| checkAccess(scope, null); |
| } // if depth>0, path emulation will diagnose bad scenarii |
| |
| MethodScope methodScope = scope.namedMethodScope(); |
| if (methodScope != null) { |
| MethodBinding method = methodScope.referenceMethodBinding(); |
| if (method != null) { |
| TypeBinding receiver = method.receiver; |
| while (receiver != null) { |
| if (TypeBinding.equalsEquals(receiver, this.resolvedType)) |
| return this.resolvedType = receiver; |
| receiver = receiver.enclosingType(); |
| } |
| } |
| } |
| |
| //{ObjectTeams: wrap role type: |
| this.resolvedType = RoleTypeCreator.maybeWrapUnqualifiedRoleType( |
| scope, |
| this.resolvedType, |
| this); |
| // SH} |
| return this.resolvedType; |
| } |
| |
| int findCompatibleEnclosing(ReferenceBinding enclosingType, TypeBinding type, BlockScope scope) { |
| int depth = 0; |
| this.currentCompatibleType = enclosingType; |
| while (this.currentCompatibleType != null && TypeBinding.notEquals(this.currentCompatibleType, type)) { |
| depth++; |
| this.currentCompatibleType = this.currentCompatibleType.isStatic() ? null : this.currentCompatibleType.enclosingType(); |
| } |
| return depth; |
| } |
| |
| @Override |
| public StringBuffer printExpression(int indent, StringBuffer output) { |
| |
| return this.qualification.print(0, output).append(".this"); //$NON-NLS-1$ |
| } |
| |
| @Override |
| public void traverse( |
| ASTVisitor visitor, |
| BlockScope blockScope) { |
| |
| if (visitor.visit(this, blockScope)) { |
| this.qualification.traverse(visitor, blockScope); |
| } |
| visitor.endVisit(this, blockScope); |
| } |
| |
| @Override |
| public void traverse( |
| ASTVisitor visitor, |
| ClassScope blockScope) { |
| |
| if (visitor.visit(this, blockScope)) { |
| this.qualification.traverse(visitor, blockScope); |
| } |
| visitor.endVisit(this, blockScope); |
| } |
| } |