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/*******************************************************************************
* Copyright (c) 2011, 2014 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 429958 - [1.8][null] evaluate new DefaultLocation attribute of @NonNullByDefault
* Andy Clement (GoPivotal, Inc) aclement@gopivotal.com - Contributions for
* Bug 409236 - [1.8][compiler] Type annotations on intersection cast types dropped by code generator
*******************************************************************************/
package org.eclipse.jdt.internal.compiler.ast;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.jdt.internal.compiler.ASTVisitor;
import org.eclipse.jdt.internal.compiler.lookup.BlockScope;
import org.eclipse.jdt.internal.compiler.lookup.ClassScope;
import org.eclipse.jdt.internal.compiler.lookup.IntersectionTypeBinding18;
import org.eclipse.jdt.internal.compiler.lookup.ReferenceBinding;
import org.eclipse.jdt.internal.compiler.lookup.Scope;
import org.eclipse.jdt.internal.compiler.lookup.TagBits;
import org.eclipse.jdt.internal.compiler.lookup.TypeBinding;
@SuppressWarnings({"rawtypes"})
public class IntersectionCastTypeReference extends TypeReference {
public TypeReference[] typeReferences;
public IntersectionCastTypeReference(TypeReference[] typeReferences) {
this.typeReferences = typeReferences;
this.sourceStart = typeReferences[0].sourceStart;
int length = typeReferences.length;
this.sourceEnd = typeReferences[length - 1].sourceEnd;
for (int i = 0, max = typeReferences.length; i < max; i++) {
if ((typeReferences[i].bits & ASTNode.HasTypeAnnotations) != 0) {
this.bits |= ASTNode.HasTypeAnnotations;
break;
}
}
}
@Override
public TypeReference augmentTypeWithAdditionalDimensions(int additionalDimensions, Annotation[][] additionalAnnotations, boolean isVarargs) {
throw new UnsupportedOperationException(); // no syntax for this.
}
@Override
public char[] getLastToken() {
return null;
}
/**
* @see org.eclipse.jdt.internal.compiler.ast.ArrayQualifiedTypeReference#getTypeBinding(org.eclipse.jdt.internal.compiler.lookup.Scope)
*/
@Override
protected TypeBinding getTypeBinding(Scope scope) {
return null; // not supported here - combined with resolveType(...)
}
@Override
public TypeReference[] getTypeReferences() {
return this.typeReferences;
}
@Override
public TypeBinding resolveType(BlockScope scope, boolean checkBounds, int location) {
int length = this.typeReferences.length;
ReferenceBinding[] intersectingTypes = new ReferenceBinding[length];
boolean hasError = false;
int typeCount = 0;
nextType:
for (int i = 0; i < length; i++) {
final TypeReference typeReference = this.typeReferences[i];
TypeBinding type = typeReference.resolveType(scope, checkBounds, location);
if (type == null || ((type.tagBits & TagBits.HasMissingType) != 0)) {
hasError = true;
continue;
}
if (i == 0) {
if (type.isBaseType()) { // rejected in grammar for i > 0
scope.problemReporter().onlyReferenceTypesInIntersectionCast(typeReference);
hasError = true;
continue;
}
if (type.isArrayType()) { // javac rejects the pedantic cast: (X[] & Serializable & Cloneable) new X[0], what is good for the goose ...
scope.problemReporter().illegalArrayTypeInIntersectionCast(typeReference);
hasError = true;
continue;
}
} else if (!type.isInterface()) {
scope.problemReporter().boundMustBeAnInterface(typeReference, type);
hasError = true;
continue;
}
for (int j = 0; j < typeCount; j++) {
final ReferenceBinding priorType = intersectingTypes[j];
if (TypeBinding.equalsEquals(priorType, type)) {
scope.problemReporter().duplicateBoundInIntersectionCast(typeReference);
hasError = true;
continue;
}
if (!priorType.isInterface())
continue;
if (TypeBinding.equalsEquals(type.findSuperTypeOriginatingFrom(priorType), priorType)) {
intersectingTypes[j] = (ReferenceBinding) type;
continue nextType;
}
if (TypeBinding.equalsEquals(priorType.findSuperTypeOriginatingFrom(type), type))
continue nextType;
}
intersectingTypes[typeCount++] = (ReferenceBinding) type;
}
if (hasError) {
return null;
}
if (typeCount != length) {
if (typeCount == 1) {
return this.resolvedType = intersectingTypes[0];
}
System.arraycopy(intersectingTypes, 0, intersectingTypes = new ReferenceBinding[typeCount], 0, typeCount);
}
IntersectionTypeBinding18 intersectionType = (IntersectionTypeBinding18) scope.environment().createIntersectionType18(intersectingTypes);
// check for parameterized interface collisions (when different parameterizations occur)
ReferenceBinding itsSuperclass = null;
ReferenceBinding[] interfaces = intersectingTypes;
ReferenceBinding firstType = intersectingTypes[0];
if (firstType.isClass()) {
itsSuperclass = firstType.superclass();
System.arraycopy(intersectingTypes, 1, interfaces = new ReferenceBinding[typeCount - 1], 0, typeCount - 1);
}
Map invocations = new HashMap(2);
nextInterface: for (int i = 0, interfaceCount = interfaces.length; i < interfaceCount; i++) {
ReferenceBinding one = interfaces[i];
if (one == null) continue nextInterface;
if (itsSuperclass != null && scope.hasErasedCandidatesCollisions(itsSuperclass, one, invocations, intersectionType, this))
continue nextInterface;
nextOtherInterface: for (int j = 0; j < i; j++) {
ReferenceBinding two = interfaces[j];
if (two == null) continue nextOtherInterface;
if (scope.hasErasedCandidatesCollisions(one, two, invocations, intersectionType, this))
continue nextInterface;
}
}
if ((intersectionType.tagBits & TagBits.HierarchyHasProblems) != 0)
return null;
return (this.resolvedType = intersectionType);
}
@Override
public char[][] getTypeName() {
// we need to keep a return value that is a char[][]
return this.typeReferences[0].getTypeName();
}
@Override
public void traverse(ASTVisitor visitor, BlockScope scope) {
if (visitor.visit(this, scope)) {
int length = this.typeReferences == null ? 0 : this.typeReferences.length;
for (int i = 0; i < length; i++) {
this.typeReferences[i].traverse(visitor, scope);
}
}
visitor.endVisit(this, scope);
}
@Override
public void traverse(ASTVisitor visitor, ClassScope scope) {
throw new UnsupportedOperationException("Unexpected traversal request: IntersectionTypeReference in class scope"); //$NON-NLS-1$
}
@Override
public StringBuffer printExpression(int indent, StringBuffer output) {
int length = this.typeReferences == null ? 0 : this.typeReferences.length;
printIndent(indent, output);
for (int i = 0; i < length; i++) {
this.typeReferences[i].printExpression(0, output);
if (i != length - 1) {
output.append(" & "); //$NON-NLS-1$
}
}
return output;
}
}
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