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/*******************************************************************************
* 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
*******************************************************************************/
package org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types;
import java.util.Map;
import org.eclipse.core.runtime.Assert;
import org.eclipse.jdt.core.IType;
import org.eclipse.jdt.core.dom.ITypeBinding;
public abstract class HierarchyType extends TType {
private HierarchyType fSuperclass;
private HierarchyType[] fInterfaces;
private IType fJavaElementType;
protected HierarchyType(TypeEnvironment environment) {
super(environment);
}
protected void initialize(ITypeBinding binding, IType javaElementType) {
super.initialize(binding);
Assert.isNotNull(javaElementType);
fJavaElementType= javaElementType;
TypeEnvironment environment= getEnvironment();
ITypeBinding superclass= binding.getSuperclass();
if (superclass != null) {
fSuperclass= (HierarchyType)environment.create(superclass);
}
ITypeBinding[] interfaces= binding.getInterfaces();
fInterfaces= new HierarchyType[interfaces.length];
for (int i= 0; i < interfaces.length; i++) {
fInterfaces[i]= (HierarchyType)environment.create(interfaces[i]);
}
}
@Override
public TType getSuperclass() {
return fSuperclass;
}
@Override
public TType[] getInterfaces() {
return fInterfaces;
}
public IType getJavaElementType() {
return fJavaElementType;
}
public boolean isSubType(HierarchyType other) {
if (getEnvironment() == other.getEnvironment()) {
Map<TypeTuple, Boolean> cache= getEnvironment().getSubTypeCache();
TypeTuple key= new TypeTuple(this, other);
Boolean value= cache.get(key);
if (value != null)
return value.booleanValue();
boolean isSub= doIsSubType(other);
value= Boolean.valueOf(isSub);
cache.put(key, value);
return isSub;
}
return doIsSubType(other);
}
private boolean doIsSubType(HierarchyType other) {
if (fSuperclass != null && (other.isTypeEquivalentTo(fSuperclass) || fSuperclass.doIsSubType(other)))
return true;
for (int i= 0; i < fInterfaces.length; i++) {
if (other.isTypeEquivalentTo(fInterfaces[i]) || fInterfaces[i].doIsSubType(other))
return true;
}
return false;
}
protected boolean canAssignToStandardType(StandardType target) {
if (target.isJavaLangObject())
return true;
return isSubType(target);
}
}
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