| /******************************************************************************* |
| * Copyright (c) 2000, 2011 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.ui.workingsets; |
| |
| import org.eclipse.core.runtime.IAdaptable; |
| import org.eclipse.core.runtime.IPath; |
| |
| import org.eclipse.core.resources.IResource; |
| |
| import org.eclipse.jface.viewers.Viewer; |
| |
| import org.eclipse.ui.IWorkingSet; |
| |
| import org.eclipse.jdt.core.IJarEntryResource; |
| import org.eclipse.jdt.core.IJavaElement; |
| import org.eclipse.jdt.core.IJavaProject; |
| import org.eclipse.jdt.core.IMember; |
| import org.eclipse.jdt.core.IPackageFragmentRoot; |
| import org.eclipse.jdt.core.JavaCore; |
| |
| import org.eclipse.jdt.internal.ui.packageview.PackageFragmentRootContainer; |
| import org.eclipse.jdt.internal.ui.packageview.ClassPathContainer.RequiredProjectWrapper; |
| import org.eclipse.jdt.internal.ui.viewsupport.JavaViewerFilter; |
| |
| /** |
| * Working set filter for Java viewers. |
| */ |
| public class WorkingSetFilter extends JavaViewerFilter { |
| |
| |
| private static class WorkingSetCompareEntry { |
| |
| /** |
| * Denotes an {@link IJarEntryResource} if it is |
| * <code>null && fJavaElement != null.</code> |
| */ |
| private IPath fResourcePath; |
| private IJavaElement fJavaElement; |
| |
| |
| public WorkingSetCompareEntry(IAdaptable a) { |
| if (a instanceof IJavaElement) { |
| init((IJavaElement) a); |
| } else if (a instanceof IResource) { |
| init((IResource) a); |
| } else if (a instanceof RequiredProjectWrapper) { |
| RequiredProjectWrapper wrapper= (RequiredProjectWrapper) a; |
| IJavaProject proj= wrapper.getParentClassPathContainer().getJavaProject(); |
| // the project reference is treated like an internal JAR. |
| // that means it will only appear if the parent container project is in the working set |
| IResource fakeInternal= proj.getProject().getFile(wrapper.getProject().getElementName() + "-fake-jar.jar"); //$NON-NLS-1$ |
| init(proj.getPackageFragmentRoot(fakeInternal)); |
| } else if (a instanceof IJarEntryResource) { |
| init((IJarEntryResource)a); |
| } else { |
| IJavaElement je= a.getAdapter(IJavaElement.class); |
| if (je != null) { |
| init(je); |
| } else { |
| IResource resource= a.getAdapter(IResource.class); |
| if (resource != null) { |
| init(resource); |
| } else { |
| fResourcePath= null; |
| fJavaElement= null; |
| } |
| } |
| } |
| } |
| |
| private void init(IResource resource) { |
| fJavaElement= JavaCore.create(resource); |
| fResourcePath= resource.getFullPath(); |
| } |
| |
| private void init(IJavaElement curr) { |
| fJavaElement= curr; |
| fResourcePath= curr.getPath(); |
| } |
| |
| private void init(IJarEntryResource jarEntryResource) { |
| Object parent= jarEntryResource.getParent(); |
| while (parent instanceof IJarEntryResource) |
| parent= ((IJarEntryResource)parent).getParent(); |
| fJavaElement= (IJavaElement)parent; |
| fResourcePath= null; |
| } |
| |
| public boolean contains(WorkingSetCompareEntry element) { |
| if (fJavaElement != null && element.fJavaElement != null) { |
| IJavaElement other= element.fJavaElement; |
| if (fJavaElement.getElementType() == IJavaElement.JAVA_PROJECT) { |
| if (!((IJavaProject) fJavaElement).getProject().isAccessible()) { |
| return false; |
| } |
| IPackageFragmentRoot pkgRoot= (IPackageFragmentRoot) other.getAncestor(IJavaElement.PACKAGE_FRAGMENT_ROOT); |
| if (pkgRoot != null && pkgRoot.isExternal()) { |
| if (((IJavaProject) fJavaElement).isOnClasspath(other)) { |
| return true; |
| } |
| } |
| } |
| |
| // Check relationship in both directions except for IJarFileEntryResource which cannot be part of a working set |
| if (isAncestor(other, fJavaElement) || isAncestor(fJavaElement, other) && element.fResourcePath != null) { |
| return true; |
| } |
| return false; |
| } |
| if (fResourcePath != null && element.fResourcePath != null) { |
| IPath other= element.fResourcePath; |
| if (other.isPrefixOf(fResourcePath) || fResourcePath.isPrefixOf(other)) |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * Check whether the given parent is an ancestor of the given element |
| * or the same as the element. |
| * |
| * @param elem the element |
| * @param parent the anchestor |
| * @return <code>true</code> if it is an ancestor |
| */ |
| private boolean isAncestor(IJavaElement elem, IJavaElement parent) { |
| IJavaElement anc= elem.getAncestor(parent.getElementType()); |
| if (parent.equals(anc)) { |
| return true; |
| } |
| while (anc instanceof IMember) { // ITypes can be in ITypes |
| anc= anc.getParent().getAncestor(parent.getElementType()); |
| if (parent.equals(anc)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| } |
| |
| private IWorkingSet fWorkingSet; |
| |
| private WorkingSetCompareEntry[] fCachedCompareEntries; |
| |
| public WorkingSetFilter() { |
| fWorkingSet= null; |
| fCachedCompareEntries= null; |
| } |
| |
| /** |
| * Returns the working set which is used by this filter. |
| * |
| * @return the working set |
| */ |
| public IWorkingSet getWorkingSet() { |
| return fWorkingSet; |
| } |
| |
| /** |
| * Sets this filter's working set. |
| * |
| * @param workingSet the working set |
| */ |
| public void setWorkingSet(IWorkingSet workingSet) { |
| if (fWorkingSet != workingSet) { |
| fWorkingSet= workingSet; |
| notifyWorkingSetContentChange(); |
| } |
| } |
| |
| @Override |
| protected void initFilter() { |
| notifyWorkingSetContentChange(); |
| } |
| |
| /** |
| * Invoke when the content of the current working set changed. Clients are responsible to listen to changes and call this method. |
| */ |
| public final void notifyWorkingSetContentChange() { |
| if (fWorkingSet != null) { |
| IAdaptable[] elements= fWorkingSet.getElements(); |
| fCachedCompareEntries= new WorkingSetCompareEntry[elements.length]; |
| for (int i= 0; i < elements.length; i++) { |
| fCachedCompareEntries[i]= new WorkingSetCompareEntry(elements[i]); |
| } |
| } else { |
| fCachedCompareEntries= null; |
| } |
| } |
| |
| @Override |
| protected void freeFilter() { |
| fCachedCompareEntries= null; |
| } |
| |
| /* |
| * Overrides method from ViewerFilter. |
| */ |
| @Override |
| public boolean select(Viewer viewer, Object parentElement, Object element) { |
| if (fWorkingSet == null || (fWorkingSet.isAggregateWorkingSet() && fWorkingSet.isEmpty())) |
| return true; |
| |
| if (element instanceof PackageFragmentRootContainer) { |
| return isEnclosing((PackageFragmentRootContainer)element); |
| } |
| |
| if (element instanceof IAdaptable) |
| return isEnclosing((IAdaptable)element); |
| |
| return true; |
| } |
| |
| public boolean isEnclosing(IAdaptable a) { |
| WorkingSetCompareEntry curr= new WorkingSetCompareEntry(a); |
| if (fCachedCompareEntries != null) { |
| for (int i= 0; i < fCachedCompareEntries.length; i++) { |
| if (fCachedCompareEntries[i].contains(curr)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| if (fWorkingSet != null) { |
| IAdaptable[] elements= fWorkingSet.getElements(); |
| for (int i= 0; i < elements.length; i++) { |
| if (new WorkingSetCompareEntry(elements[i]).contains(curr)) { |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| private boolean isEnclosing(PackageFragmentRootContainer container) { |
| // check whether the containing package fragment roots are enclosed |
| IAdaptable[] roots= container.getChildren(); |
| for (int i= 0; i < roots.length; i++) { |
| if (isEnclosing(roots[i])) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| } |