/*******************************************************************************
* Copyright (c) 2000, 2013 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.core.hierarchy;
import java.util.ArrayList;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jdt.core.*;
import org.eclipse.jdt.core.search.IJavaSearchScope;
import org.eclipse.jdt.internal.core.CompilationUnit;
import org.eclipse.jdt.internal.core.JavaElement;
import org.eclipse.jdt.internal.core.Openable;
import org.eclipse.jdt.internal.core.Region;
import org.eclipse.jdt.internal.core.TypeVector;
@SuppressWarnings({"rawtypes"})
public class RegionBasedTypeHierarchy extends TypeHierarchy {
/**
* The region of types for which to build the hierarchy
*/
protected IRegion region;
/**
* Creates a TypeHierarchy on the types in the specified region,
* considering first the given working copies,
* using the projects in the given region for a name lookup context. If a specific
* type is also specified, the type hierarchy is pruned to only
* contain the branch including the specified type.
*/
public RegionBasedTypeHierarchy(IRegion region, ICompilationUnit[] workingCopies, IType type, boolean computeSubtypes) {
super(type, workingCopies, (IJavaSearchScope)null, computeSubtypes);
Region newRegion = new Region() {
public void add(IJavaElement element) {
if (!contains(element)) {
//"new" element added to region
removeAllChildren(element);
this.rootElements.add(element);
if (element.getElementType() == IJavaElement.JAVA_PROJECT) {
// add jar roots as well so that jars don't rely on their parent to know
// if they are contained in the region
// (see https://bugs.eclipse.org/bugs/show_bug.cgi?id=146615)
try {
IPackageFragmentRoot[] roots = ((IJavaProject) element).getPackageFragmentRoots();
for (int i = 0, length = roots.length; i < length; i++) {
if (roots[i].isArchive() && !this.rootElements.contains(roots[i]))
this.rootElements.add(roots[i]);
}
} catch (JavaModelException e) {
// project doesn't exist
}
}
this.rootElements.trimToSize();
}
}
};
IJavaElement[] elements = region.getElements();
for (int i = 0, length = elements.length; i < length; i++) {
newRegion.add(elements[i]);
}
this.region = newRegion;
if (elements.length > 0)
this.project = elements[0].getJavaProject();
}
/*
* @see TypeHierarchy#initializeRegions
*/
protected void initializeRegions() {
super.initializeRegions();
IJavaElement[] roots = this.region.getElements();
for (int i = 0; i < roots.length; i++) {
IJavaElement root = roots[i];
if (root instanceof IOpenable) {
this.files.put(root, new ArrayList());
} else {
Openable o = (Openable) ((JavaElement) root).getOpenableParent();
if (o != null) {
this.files.put(o, new ArrayList());
}
}
checkCanceled();
}
}
/**
* Compute this type hierarchy.
*/
protected void compute() throws JavaModelException, CoreException {
HierarchyBuilder builder = new RegionBasedHierarchyBuilder(this);
builder.build(this.computeSubtypes);
}
protected boolean isAffectedByOpenable(IJavaElementDelta delta, IJavaElement element, int eventType) {
// change to working copy
if (element instanceof CompilationUnit && ((CompilationUnit)element).isWorkingCopy()) {
return super.isAffectedByOpenable(delta, element, eventType);
}
// if no focus, hierarchy is affected if the element is part of the region
if (this.focusType == null) {
return this.region.contains(element);
} else {
return super.isAffectedByOpenable(delta, element, eventType);
}
}
/**
* Returns the java project this hierarchy was created in.
*/
public IJavaProject javaProject() {
return this.project;
}
public void pruneDeadBranches() {
pruneDeadBranches(getRootClasses());
pruneDeadBranches(getRootInterfaces());
}
/*
* Returns whether all subtypes of the given type have been pruned.
*/
private boolean pruneDeadBranches(IType type) {
TypeVector subtypes = (TypeVector)this.typeToSubtypes.get(type);
if (subtypes == null) return true;
pruneDeadBranches(subtypes.copy().elements());
subtypes = (TypeVector)this.typeToSubtypes.get(type);
return (subtypes == null || subtypes.size == 0);
}
private void pruneDeadBranches(IType[] types) {
for (int i = 0, length = types.length; i < length; i++) {
IType type = types[i];
if (pruneDeadBranches(type) && !this.region.contains(type)) {
removeType(type);
}
}
}
/**
* Removes all the subtypes of the given type from the type hierarchy,
* removes its superclass entry and removes the references from its super types.
*/
protected void removeType(IType type) {
IType[] subtypes = getSubtypes(type);
this.typeToSubtypes.remove(type);
if (subtypes != null) {
for (int i= 0; i < subtypes.length; i++) {
removeType(subtypes[i]);
}
}
IType superclass = (IType)this.classToSuperclass.remove(type);
if (superclass != null) {
TypeVector types = (TypeVector)this.typeToSubtypes.get(superclass);
if (types != null) types.remove(type);
}
IType[] superinterfaces = (IType[])this.typeToSuperInterfaces.remove(type);
if (superinterfaces != null) {
for (int i = 0, length = superinterfaces.length; i < length; i++) {
IType superinterface = superinterfaces[i];
TypeVector types = (TypeVector)this.typeToSubtypes.get(superinterface);
if (types != null) types.remove(type);
}
}
this.interfaces.remove(type);
}
}