| /******************************************************************************* |
| * Copyright (c) 2001, 2004 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.jem.internal.adapters.jdom; |
| /* |
| * $RCSfile: JavaModelListener.java,v $ |
| * $Revision: 1.6 $ $Date: 2005/02/15 23:09:27 $ |
| */ |
| |
| import java.util.*; |
| |
| import org.eclipse.core.resources.*; |
| import org.eclipse.core.runtime.IPath; |
| import org.eclipse.jdt.core.*; |
| |
| /** |
| * Insert the type's description here. |
| * Creation date: (10/31/2000 1:13:12 PM) |
| * @author: Administrator |
| */ |
| public abstract class JavaModelListener implements IElementChangedListener { |
| |
| /** |
| * JavaModelListener constructor comment. |
| */ |
| public JavaModelListener() { |
| this(ElementChangedEvent.POST_CHANGE); |
| } |
| |
| public JavaModelListener(int eventsToListen) { |
| JavaCore.addElementChangedListener(this, eventsToListen); |
| } |
| /** |
| * One or more attributes of one or more elements maintained by |
| * the Java model have changed. The specific details of the change |
| * are described by the given <code>ElementChangedEvent</code>. |
| * |
| * @see ElementChangedEvent |
| */ |
| public void elementChanged(ElementChangedEvent event) { |
| processDelta((IJavaElementDelta) event.getSource()); |
| } |
| /** |
| * Generically dispatch the children of the delta. |
| * |
| */ |
| protected void processChildren(IJavaElement element, IJavaElementDelta delta) { |
| IJavaElementDelta[] children = delta.getAffectedChildren(); |
| for (int i = 0; i < children.length; i++) { |
| processDelta(children[i]); |
| } |
| } |
| /** |
| * Source context has been changed. |
| * Creation date: (8/17/2001 3:58:31 PM) |
| * @param param org.eclipse.jdt.core.IJavaElementDelta |
| */ |
| protected void processContentChanged(IJavaElementDelta delta) { |
| // override to implement specific behavior |
| } |
| /** |
| * Dispatch the detailed handling of an element changed event. |
| * |
| * @see ElementChangedEvent |
| */ |
| public void processDelta(IJavaElementDelta delta) { |
| IJavaElement element = delta.getElement(); |
| |
| switch (element.getElementType()) { |
| case IJavaElement.JAVA_MODEL : |
| processJavaElementChanged((IJavaModel) element, delta); |
| break; |
| case IJavaElement.JAVA_PROJECT : |
| processJavaElementChanged((IJavaProject) element, delta); |
| break; |
| case IJavaElement.PACKAGE_FRAGMENT_ROOT : |
| processJavaElementChanged((IPackageFragmentRoot) element, delta); |
| break; |
| case IJavaElement.PACKAGE_FRAGMENT : |
| processJavaElementChanged((IPackageFragment) element, delta); |
| break; |
| case IJavaElement.COMPILATION_UNIT : |
| processJavaElementChanged((ICompilationUnit) element, delta); |
| processContentChanged(delta) ; |
| break; |
| case IJavaElement.CLASS_FILE : |
| processJavaElementChanged((IClassFile) element, delta); |
| break; |
| case IJavaElement.TYPE : |
| processJavaElementChanged((IType) element, delta); |
| break; |
| // Note: if we are to update the Method/Field adapters, we should process the |
| // IJavaElement.METHOD and IJavaElement.FIELD |
| } |
| } |
| /** |
| * Handle the change for a single element, children will be handled separately. |
| * |
| */ |
| protected void processJavaElementChanged(IClassFile element, IJavaElementDelta delta) { |
| // override to implement specific behavior |
| } |
| /** |
| * Handle the change for a single element, children will be handled separately. |
| * |
| */ |
| protected void processJavaElementChanged(ICompilationUnit element, IJavaElementDelta delta) { |
| processChildren(element, delta); |
| } |
| /** |
| * Handle the change for a single element, children will be handled separately. |
| * |
| */ |
| protected void processJavaElementChanged(IJavaModel element, IJavaElementDelta delta) { |
| processChildren(element, delta); |
| } |
| /** |
| * Handle the change for a single element, children will be handled separately. |
| * |
| */ |
| protected void processJavaElementChanged(IJavaProject element, IJavaElementDelta delta) { |
| processChildren(element, delta); |
| } |
| /** |
| * Handle the change for a single element, children will be handled separately. |
| * |
| */ |
| protected void processJavaElementChanged(IPackageFragment element, IJavaElementDelta delta) { |
| processChildren(element, delta); |
| } |
| /** |
| * Handle the change for a single element, children will be handled separately. |
| * |
| */ |
| protected void processJavaElementChanged(IPackageFragmentRoot element, IJavaElementDelta delta) { |
| processChildren(element, delta); |
| } |
| /** |
| * Handle the change for a single element, children will be handled separately. |
| * |
| */ |
| protected void processJavaElementChanged(IType element, IJavaElementDelta delta) { |
| // override to implement specific behavior |
| } |
| |
| protected boolean isClassPathChange(IJavaElementDelta delta) { |
| int flags = delta.getFlags(); |
| return (delta.getKind() == IJavaElementDelta.CHANGED && ((flags & IJavaElementDelta.F_ADDED_TO_CLASSPATH) != 0) || ((flags & IJavaElementDelta.F_REMOVED_FROM_CLASSPATH) != 0) || ((flags & IJavaElementDelta.F_REORDER) != 0)); |
| } |
| |
| /** |
| * Method isClasspathResourceChange. |
| * @param delta |
| * @return boolean |
| */ |
| protected boolean isClasspathResourceChange(IJavaElementDelta delta) { |
| if ((delta.getFlags() & IJavaElementDelta.F_CLASSPATH_CHANGED) != 0) |
| return true; |
| IResourceDelta[] resources = delta.getResourceDeltas(); |
| if (resources == null) |
| return false; |
| IPath path = null; |
| for (int i = 0; i < resources.length; i++) { |
| if (resources[i].getKind() == IResourceDelta.CHANGED) { |
| path = resources[i].getProjectRelativePath(); |
| if (isAlsoClasspathChange(path)) |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Is this path also a classpath change type of resource. If so, return true. |
| * Subclasses may override. Default is false. |
| * @param path |
| * @return |
| * |
| * @since 1.0.0 |
| */ |
| protected boolean isAlsoClasspathChange(IPath path) { |
| return false; |
| } |
| |
| /** |
| * This method will check to see if a <code>javaProject</code> is a project in the |
| * classpath of the adapterFactory java project. |
| */ |
| protected boolean isInClasspath(IJavaProject javaProject) { |
| IJavaProject adapterJavaProject = getJavaProject(); |
| if (javaProject.equals(adapterJavaProject)) |
| return true; |
| return isInClasspath(javaProject, adapterJavaProject, true, new HashSet()); |
| } |
| |
| /** |
| * Get the java project that we are interested in. |
| * @return |
| * |
| * @since 1.0.0 |
| */ |
| protected abstract IJavaProject getJavaProject(); |
| |
| /* |
| * test to see if the testProject is in the classpath (including from any referenced projects) of the target project. |
| * Keep track of those already visited so as not to visit again. |
| * TODO This should be made private. |
| */ |
| protected boolean isInClasspath(IJavaProject testProject, IJavaProject targetProject, boolean isFirstLevel, Set visited) { |
| if (visited.contains(targetProject)) |
| return false; |
| visited.add(targetProject); |
| IClasspathEntry[] entries = null; |
| try { |
| entries = targetProject.getRawClasspath(); |
| } catch (JavaModelException e) { |
| return false; |
| } |
| IClasspathEntry entry, resEntry; |
| IJavaProject proj = null; |
| List projects = null; |
| for (int i = 0; i < entries.length; i++) { |
| entry = entries[i]; |
| if (entry.getEntryKind() == IClasspathEntry.CPE_PROJECT) { |
| resEntry = JavaCore.getResolvedClasspathEntry(entry); |
| proj = getJavaProject(entry); |
| if (isFirstLevel || resEntry.isExported()) { |
| if (proj.equals(testProject)) |
| return true; |
| else { |
| if (projects == null) |
| projects = new ArrayList(); |
| projects.add(proj); |
| } |
| } |
| } |
| } |
| return isInClasspath(testProject, projects, false, visited); |
| } |
| |
| /* |
| * See if the testProject is in the classpath of any of the list of projects or in any project that an entry |
| * in the list may of visited. |
| * TODO This should be made private. |
| */ |
| protected boolean isInClasspath(IJavaProject testProject, List someJavaProjects, boolean isFirstLevel, Set visited) { |
| if (someJavaProjects == null) |
| return false; |
| int size = someJavaProjects.size(); |
| IJavaProject javaProj = null; |
| for (int i = 0; i < size; i++) { |
| javaProj = (IJavaProject) someJavaProjects.get(i); |
| return isInClasspath(testProject, javaProj, isFirstLevel, visited); |
| } |
| return false; |
| } |
| |
| protected IJavaProject getJavaProject(IClasspathEntry entry) { |
| IProject proj = getWorkspaceRoot().getProject(entry.getPath().segment(0)); |
| if (proj != null) |
| return (IJavaProject) JavaCore.create(proj); |
| return null; |
| } |
| |
| protected IWorkspaceRoot getWorkspaceRoot() { |
| return ResourcesPlugin.getWorkspace().getRoot(); |
| } |
| } |