| /******************************************************************************* |
| * 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 |
| * 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 |
| * bug 404728 - [1.8]NPE on QualifiedSuperReference error |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.compiler.ast; |
| |
| import org.eclipse.jdt.internal.compiler.ASTVisitor; |
| import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants; |
| import org.eclipse.jdt.internal.compiler.impl.CompilerOptions; |
| import org.eclipse.jdt.internal.compiler.lookup.BlockScope; |
| import org.eclipse.jdt.internal.compiler.lookup.ClassScope; |
| import org.eclipse.jdt.internal.compiler.lookup.ProblemReasons; |
| import org.eclipse.jdt.internal.compiler.lookup.ProblemReferenceBinding; |
| import org.eclipse.jdt.internal.compiler.lookup.ReferenceBinding; |
| import org.eclipse.jdt.internal.compiler.lookup.TypeBinding; |
| |
| public class QualifiedSuperReference extends QualifiedThisReference { |
| |
| public QualifiedSuperReference(TypeReference name, int pos, int sourceEnd) { |
| super(name, pos, sourceEnd); |
| } |
| |
| @Override |
| public boolean isSuper() { |
| return true; |
| } |
| |
| @Override |
| public boolean isQualifiedSuper() { |
| return true; |
| } |
| |
| @Override |
| public boolean isThis() { |
| return false; |
| } |
| |
| @Override |
| public StringBuffer printExpression(int indent, StringBuffer output) { |
| return this.qualification.print(0, output).append(".super"); //$NON-NLS-1$ |
| } |
| |
| @Override |
| public TypeBinding resolveType(BlockScope scope) { |
| if ((this.bits & ParenthesizedMASK) != 0) { |
| scope.problemReporter().invalidParenthesizedExpression(this); |
| return null; |
| } |
| super.resolveType(scope); |
| if (this.resolvedType != null && !this.resolvedType.isValidBinding()) { |
| scope.problemReporter().illegalSuperAccess(this.qualification.resolvedType, this.resolvedType, this); |
| return null; |
| } |
| if (this.currentCompatibleType == null) |
| return null; // error case |
| |
| if (this.currentCompatibleType.id == T_JavaLangObject) { |
| scope.problemReporter().cannotUseSuperInJavaLangObject(this); |
| return null; |
| } |
| return this.resolvedType = (this.currentCompatibleType.isInterface() |
| ? this.currentCompatibleType |
| : this.currentCompatibleType.superclass()); |
| } |
| |
| @Override |
| int findCompatibleEnclosing(ReferenceBinding enclosingType, TypeBinding type, BlockScope scope) { |
| if (type.isInterface()) { |
| // super call to an overridden default method? (not considering outer enclosings) |
| CompilerOptions compilerOptions = scope.compilerOptions(); |
| ReferenceBinding[] supers = enclosingType.superInterfaces(); |
| int length = supers.length; |
| boolean isJava8 = compilerOptions.complianceLevel >= ClassFileConstants.JDK1_8; |
| boolean isLegal = true; // false => compoundName != null && closestMatch != null |
| char[][] compoundName = null; |
| ReferenceBinding closestMatch = null; |
| for (int i = 0; i < length; i++) { |
| if (TypeBinding.equalsEquals(supers[i].erasure(), type)) { |
| this.currentCompatibleType = closestMatch = supers[i]; |
| } else if (supers[i].erasure().isCompatibleWith(type)) { |
| isLegal = false; |
| compoundName = supers[i].compoundName; |
| if (closestMatch == null) |
| closestMatch = supers[i]; |
| // keep looking to ensure we always find the referenced type (even if illegal) |
| } |
| } |
| if (!isLegal || !isJava8) { |
| this.currentCompatibleType = null; |
| // Please note the slightly unconventional use of the ProblemReferenceBinding: |
| // we use the problem's compoundName to report the type being illegally bypassed, |
| // whereas the closestMatch denotes the resolved (though illegal) target type |
| // for downstream resolving. |
| this.resolvedType = new ProblemReferenceBinding(compoundName, |
| closestMatch, isJava8 ? ProblemReasons.AttemptToBypassDirectSuper : ProblemReasons.InterfaceMethodInvocationNotBelow18); |
| } |
| return 0; // never an outer enclosing type |
| } |
| return super.findCompatibleEnclosing(enclosingType, type, scope); |
| } |
| |
| @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); |
| } |
| } |