org.eclipse.jdt.internal.compiler.ast.QualifiedSuperReference Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2000, 2016 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
* 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);
}
public boolean isSuper() {
return true;
}
public boolean isQualifiedSuper() {
return true;
}
public boolean isThis() {
return false;
}
public StringBuffer printExpression(int indent, StringBuffer output) {
return this.qualification.print(0, output).append(".super"); //$NON-NLS-1$
}
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());
}
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);
}
public void traverse(
ASTVisitor visitor,
BlockScope blockScope) {
if (visitor.visit(this, blockScope)) {
this.qualification.traverse(visitor, blockScope);
}
visitor.endVisit(this, blockScope);
}
public void traverse(
ASTVisitor visitor,
ClassScope blockScope) {
if (visitor.visit(this, blockScope)) {
this.qualification.traverse(visitor, blockScope);
}
visitor.endVisit(this, blockScope);
}
}