plugins/org.eclipse.jst.j2ee.web/taglib/org/eclipse/jst/j2ee/internal/web/taglib/registry/AbstractTaglibRegistry.java - gerrit/jeetools/webtools.javaee - Git at Google

 /*******************************************************************************
  * Copyright (c) 2003, 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.jst.j2ee.internal.web.taglib.registry;

 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashSet;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Set;
 import java.util.Vector;

 import org.eclipse.core.resources.IProject;
 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.resources.IResourceDelta;
 import org.eclipse.core.resources.IResourceVisitor;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IPath;
 import org.eclipse.jem.util.logger.proxy.Logger;
 import org.eclipse.jst.j2ee.internal.project.IWebNatureConstants;
 import org.eclipse.jst.j2ee.internal.web.locator.WebProjectTaglibLocator;
 import org.eclipse.jst.j2ee.internal.web.locator.WebXMLTaglibLocator;
 import org.eclipse.jst.j2ee.internal.web.taglib.ITaglibInfo;
 import org.eclipse.jst.j2ee.internal.web.taglib.ITaglibLocator;
 import org.eclipse.jst.j2ee.internal.web.taglib.ITaglibRegistry;
 import org.eclipse.jst.j2ee.internal.web.taglib.ITaglibRegistryListener;


 /**
  * @version 1.0
  * @author
  */
 abstract public class AbstractTaglibRegistry implements ITaglibRegistry {
 	private static final boolean debug = false;

 	protected IProject project;
 	protected Vector listeners;
 	protected Vector taglibs; // of type ITaglibInfo
 	protected ITaglibLocator[] locators;
 	protected boolean needsRefresh = false;

 	public AbstractTaglibRegistry(IProject project) {
 		this.project = project;
 		initialize();
 		refresh();
 	}

 	protected void initialize() {
 		this.locators = new ITaglibLocator[]{new WebProjectTaglibLocator(this.project), new WebXMLTaglibLocator(this.project)};
 	}

 	/*
 	 * @see ITaglibRegistry#addTaglibRegistryListener(ITaglibRegistryListener)
 	 */
 	protected void addTaglib(ITaglibInfo taglib) {
 		// Add web.xml entries at the top of the list so that they are
 		// always returned first from the getTaglib(uri) method.
 		if (taglib.isWebXMLEntry())
 			this.taglibs.add(0, taglib);
 		else
 			this.taglibs.add(taglib);
 	}

 	public void addTaglibRegistryListener(ITaglibRegistryListener listener) {
 		if (this.listeners == null)
 			this.listeners = new Vector();
 		this.listeners.add(listener);
 	}

 	/*
 	 * @see ITaglibRegistry#getTaglib(IPath)
 	 */
 	public ITaglibInfo[] getTaglibs(IPath location) {
 		Vector results = getTaglibsVector(location);
 		return (ITaglibInfo[]) results.toArray(new ITaglibInfo[results.size()]);
 	}

 	protected Vector getTaglibsVector(IPath location) {
 		Vector results = new Vector();
 		Vector tTaglibs = primGetTaglibs();

 		boolean isWebXML = isWebXMLFile(location);

 		// Start at the beginning of the taglib list and return the first
 		// one that matches the location passed in.
 		for (Iterator iter = tTaglibs.iterator(); iter.hasNext();) {
 			ITaglibInfo taglib = (ITaglibInfo) iter.next();
 			if (isWebXML) {
 				if (taglib.isWebXMLEntry())
 					results.add(taglib);
 			} else if (taglib.getLocation().equals(location))
 				results.add(taglib);
 		}
 		return results;
 	}

 	protected Vector getExistingTaglibs(IPath location) {
 		Vector results = new Vector();
 		Vector tTaglibs = this.taglibs;

 		boolean isWebXML = isWebXMLFile(location);

 		// Start at the beginning of the taglib list and return the first
 		// one that matches the location passed in.
 		for (Iterator iter = tTaglibs.iterator(); iter.hasNext();) {
 			ITaglibInfo taglib = (ITaglibInfo) iter.next();
 			if (isWebXML) {
 				if (taglib.isWebXMLEntry())
 					results.add(taglib);
 			} else if (taglib.getLocation().equals(location) && !taglib.isWebXMLEntry())
 				results.add(taglib);
 		}
 		return results;
 	}

 	public IProject getProject() {
 		return this.project;
 	}

 	/*
 	 * @see ITaglibRegistry#getRecommendedTaglibs()
 	 */
 	public ITaglibInfo[] getRecommendedTaglibs() {
 		// we pass false because we dont want to show all entries per resource,just one
 		return getValidTaglibs(false);
 	}

 	/*
 	 * @see ITaglibRegistry#getVisibleTaglibs()
 	 */
 	public ITaglibInfo[] getVisibleTaglibs() {
 		// we pass true because we want to show all entries that are valid uri's for a resource
 		return getValidTaglibs(true);
 	}


 	protected ITaglibInfo[] getValidTaglibs(boolean showAllEntriesPerResource) {
 		Vector allTaglibs = primGetTaglibs();
 		Vector results = new Vector(allTaglibs.size());
 		Set locationSet = new HashSet();
 		Set uriSet = new HashSet();

 		// first pass web.xml entries
 		for (Iterator iter = allTaglibs.iterator(); iter.hasNext();) {
 			ITaglibInfo iTaglib = (ITaglibInfo) iter.next();
 			if (iTaglib.isWebXMLEntry()) {
 				if (!uriSet.contains(iTaglib.getURI())) {
 					// show all web.xml entries whether they are mapped to the same resource
 					//	if(showAllEntriesPerResource ||
 					// !locationSet.contains(iTaglib.getLocation())){
 					if (!locationSet.contains(iTaglib.getLocation()))
 						locationSet.add(iTaglib.getLocation());
 					results.add(iTaglib);
 					//					}
 					uriSet.add(iTaglib.getURI());
 				}
 			}
 		}

 		// second pass uri in tld entries
 		for (Iterator iter = allTaglibs.iterator(); iter.hasNext();) {
 			ITaglibInfo iTaglib = (ITaglibInfo) iter.next();
 			if (iTaglib.isURIFromTLD() && !iTaglib.isWebXMLEntry()) {
 				if (!uriSet.contains(iTaglib.getURI())) {
 					if (!iTaglib.isInJar()) {
 						// i.e its a tld file in the web application
 						if (showAllEntriesPerResource || !locationSet.contains(iTaglib.getLocation())) {
 							if (!locationSet.contains(iTaglib.getLocation()))
 								locationSet.add(iTaglib.getLocation());
 							results.add(iTaglib);
 						}
 					} else { // i.e its a tld file in a JAR file in the web application
 						String jarRelativePath = iTaglib.getTLDLocation().toString();
 						if (jarRelativePath.equalsIgnoreCase(IWebNatureConstants.META_INFO_DIRECTORY + "/taglib.tld")) { //$NON-NLS-1$
 							if (!iTaglib.isServerContribution() // dont add META-INF/taglib.tld that
 																// comes from a server
 										&& (showAllEntriesPerResource || !locationSet.contains(iTaglib.getLocation()))) {
 								if (!locationSet.contains(iTaglib.getLocation()))
 									locationSet.add(iTaglib.getLocation());
 								results.add(iTaglib);
 							}
 						} else { // if not metainf/taglib.tld
 							// we want to include all the non meta-inf entries in the results
 							results.add(iTaglib);
 						}
 					}
 					uriSet.add(iTaglib.getURI());
 				} // if !uriSet.contains
 			} // if .isURIFromTLD
 		}

 		// third pass for entries whose uri's are resource paths
 		for (Iterator iter = allTaglibs.iterator(); iter.hasNext();) {
 			ITaglibInfo iTaglib = (ITaglibInfo) iter.next();
 			if (!iTaglib.isURIFromTLD() && !iTaglib.isWebXMLEntry() && !iTaglib.isDirectoryEntry()) {
 				if (!uriSet.contains(iTaglib.getURI())) {
 					if (showAllEntriesPerResource || !locationSet.contains(iTaglib.getLocation())) {
 						results.add(iTaglib);
 						locationSet.add(iTaglib.getLocation());
 					}
 				}
 			}
 		}

 		// fourth pass for entries whose uri's are resource paths & directory entries
 		for (Iterator iter = allTaglibs.iterator(); iter.hasNext();) {
 			ITaglibInfo iTaglib = (ITaglibInfo) iter.next();
 			if (iTaglib.isDirectoryEntry()) {
 				IPath directoryLoc = iTaglib.getLocation();
 				if (!uriSet.contains(iTaglib.getURI())) {
 					boolean canAdd = true;
 					for (Iterator iterator = locationSet.iterator(); iterator.hasNext();) {
 						IPath locationPath = (IPath) iterator.next();

 						if (directoryLoc.matchingFirstSegments(locationPath) == locationPath.segmentCount() - 1) {
 							canAdd = false;
 							break;
 						}
 					}
 					if (canAdd) {// don't add directories that have tld's in them
 						results.add(iTaglib);
 						locationSet.add(iTaglib.getLocation());
 					}
 				}
 			}
 		}


 		return (ITaglibInfo[]) results.toArray(new ITaglibInfo[results.size()]);
 	}

 	protected Vector primGetTaglibs() {
 		if (this.needsRefresh)
 			refresh();
 		return this.taglibs;
 	}

 	/*
 	 * @see ITaglibRegistry#getTaglibs()
 	 */
 	public ITaglibInfo[] getTaglibs() {
 		Vector tTaglibs = primGetTaglibs();
 		return (ITaglibInfo[]) tTaglibs.toArray(new ITaglibInfo[tTaglibs.size()]);
 	}

 	/*
 	 * @see ITaglibRegistry#getTaglib(String)
 	 */
 	public ITaglibInfo getTaglib(String uri) {
 		List tTaglibs = Arrays.asList(getVisibleTaglibs());
 		//commented out because we dont want to return the taglib for resources that are not
 		// visible
 		// or are not visible because of precedence //primGetTaglibs();
 		for (Iterator iter = tTaglibs.iterator(); iter.hasNext();) {
 			ITaglibInfo taglib = (ITaglibInfo) iter.next();
 			if (taglib.getURI().equals(uri))
 				return taglib;
 		}
 		return null;
 	}

 	protected void fireTaglibAdded(ITaglibInfo addedTaglib) {
 		if (debug)
 			System.out.println("TaglibRegistry: taglib added: " + addedTaglib); //$NON-NLS-1$

 		if (this.listeners == null)
 			return;
 		for (Iterator iter = this.listeners.iterator(); iter.hasNext();) {
 			ITaglibRegistryListener listener = (ITaglibRegistryListener) iter.next();
 			listener.taglibAdded(addedTaglib);
 		}
 	}

 	protected void fireTaglibChanged(ITaglibInfo changedTaglib) {
 		if (debug)
 			System.out.println("TaglibRegistry: taglib changed: " + changedTaglib); //$NON-NLS-1$

 		if (this.listeners == null)
 			return;
 		for (Iterator iter = this.listeners.iterator(); iter.hasNext();) {
 			ITaglibRegistryListener listener = (ITaglibRegistryListener) iter.next();
 			listener.taglibChanged(changedTaglib);
 		}
 	}

 	protected void fireTaglibRemoved(ITaglibInfo removedTaglib) {
 		if (debug)
 			System.out.println("TaglibRegistry: taglib removed: " + removedTaglib); //$NON-NLS-1$

 		if (this.listeners == null)
 			return;
 		for (Iterator iter = this.listeners.iterator(); iter.hasNext();) {
 			ITaglibRegistryListener listener = (ITaglibRegistryListener) iter.next();
 			listener.taglibRemoved(removedTaglib);
 		}
 	}

 	abstract protected boolean isWebXMLFile(IPath filePath);

 	protected boolean isTaglibTLD(IPath tldPath) {
 		return tldPath.lastSegment().equalsIgnoreCase("taglib.tld"); //$NON-NLS-1$
 	}

 	public void processResourceChanged(IResourceDelta delta) {
 		int kind = delta.getKind();
 		IResource resource = delta.getResource();
 		int flags = delta.getFlags();
 		if (delta.getKind() == IResourceDelta.CHANGED && flags == IResourceDelta.NO_CHANGE)
 			return;

 		// If the websettings file changed, refresh everything in case the context root
 		// was modified or the J2EE level was changed.
 		if (requiresFullUpdate(delta)) {
 			updateAll();
 			return;
 		}
 		// Make sure resource is not null
 		if (resource == null)
 			return;

 		// Only process resource changes that are under the refreshRoot.
 		IPath resourcePath = resource.getProjectRelativePath();

 		IResource refreshRoot = getRefreshRoot();
 		// RATLC00974251 for a java project before build is done, output location does not exist
 		if (refreshRoot == null)
 			return;

 		IPath refreshPath = refreshRoot.getProjectRelativePath();
 		if (resourcePath.matchingFirstSegments(refreshPath) != refreshPath.segmentCount())
 			return;

 		if (debug)
 			System.out.println("TaglibRegistry(" + this.project.getName() + ").resourceChanged: " + delta); //$NON-NLS-1$ //$NON-NLS-2$

 		if (kind == IResourceDelta.CHANGED || kind == IResourceDelta.REPLACED) {
 			handleResourceModified(resource);
 		} else if (kind == IResourceDelta.REMOVED) {
 			handleResourceRemoved(resource);
 		} else if (kind == IResourceDelta.ADDED) {
 			handleResourceAdded(resource);
 		} else {
 			if (debug)
 				System.out.println("TaglibRegistry.resourceChanged:  UNHANDLED DELTA TYPE"); //$NON-NLS-1$
 		}
 	}

 	protected void handleResourceAdded(IResource resource) {
 		handleResourceModified(resource);
 	}

 	protected void handleResourceModified(IResource resource) {
 		try {
 			resource.accept(new IResourceVisitor() {
 				public boolean visit(IResource aresource) throws CoreException {
 					if (aresource.getType() != IResource.ROOT && AbstractTaglibRegistry.this.project != aresource.getProject())
 						return false;

 					if (aresource.getType() == IResource.FILE) {
 						processFile(aresource);
 						return false;
 					}
 					if (shouldProcessDirectory(aresource)) {
 						processDirectory(aresource);
 					}
 					return (canVisitResource(aresource));

 				}


 			});
 		} catch (CoreException e) {
 			Logger.getLogger().log(e);
 		}
 	}

 	/**
 	 * Return true if the resource and its children should be visited
 	 *
 	 * @param resource
 	 * @return
 	 */
 	protected boolean canVisitResource(IResource resource) {
 		if (resource.getType() != IResource.ROOT && this.project != resource.getProject())
 			return false;
 		if (resource.getType() != IResource.FILE)
 			return true;
 		return true;
 	}

 	protected void handleResourceRemoved(IResource resource) {
 		IPath location = resource.getProjectRelativePath();
 		ITaglibInfo[] removedTaglibs = removeTaglibs(location);
 		if (removedTaglibs != null) {
 			for (int i = 0; i < removedTaglibs.length; i++) {
 				ITaglibInfo iTaglibInfo = removedTaglibs[i];
 				if (debug)
 					System.out.println("TaglibRegistry.handleResourceRemoved taglib removed: " + iTaglibInfo); //$NON-NLS-1$
 				fireTaglibRemoved(iTaglibInfo);
 			}
 		}
 	}

 	protected IResource getRefreshRoot() {
 		return getProject();
 	}

 	public void refresh() {
 		this.taglibs = new Vector();
 		IResource refreshRoot = getRefreshRoot();

 		// RATLC00974251 for a java project before build is done, output location does not exist
 		if (refreshRoot != null)
 			handleResourceAdded(refreshRoot);

 		this.needsRefresh = false;
 	}

 	protected void updateAll() {
 		try {
 			IResource refreshRoot = getRefreshRoot();

 			// RATLC00974251 for a java project before build is done, output location does not exist
 			if (refreshRoot == null)
 				return;
 			refreshRoot.accept(new IResourceVisitor() {
 				public boolean visit(IResource resource) throws CoreException {
 					handleResourceModified(resource);
 					return true;
 				}
 			});
 		} catch (CoreException e) {
 			//Do nothing
 		}
 	}

 	/**
 	 * Remove all the taglibs associated with the location.
 	 *
 	 * @param location
 	 * @return ITaglibInfo[] The taglibs that are removed. Null if none are removed.
 	 */
 	protected ITaglibInfo[] removeTaglibs(IPath location) {
 		List results = new ArrayList();

 		boolean isWebXML = isWebXMLFile(location);
 		for (int i = 0; i < this.taglibs.size(); i++) {
 			ITaglibInfo taglib = (ITaglibInfo) this.taglibs.get(i);
 			if (isWebXML) {
 				if (taglib.isWebXMLEntry()) {
 					removeTaglib(i);
 					results.add(taglib);
 					i--;
 				}
 			} else if (taglib.getLocation().equals(location)) {
 				removeTaglib(i);
 				results.add(taglib);
 				i--;
 			}
 		}
 		return results.isEmpty() ? null : (ITaglibInfo[]) results.toArray(new ITaglibInfo[results.size()]);
 	}

 	abstract protected boolean requiresFullUpdate(IResourceDelta delta);

 	protected void removeTaglib(int i) {
 		this.taglibs.remove(i);
 	}

 	protected ITaglibInfo[] searchForTaglibs(IResource resource) {
 		ArrayList results = new ArrayList();
 		for (int i = 0; i < this.locators.length; i++) {
 			ITaglibLocator tLocator = this.locators[i];
 			ITaglibInfo[] tTaglibs = tLocator.search(resource);
 			if (tTaglibs != null) {
 				for (int j = 0; j < tTaglibs.length; j++) {
 					results.add(tTaglibs[j]);
 				}
 			}
 		}
 		return (ITaglibInfo[]) results.toArray(new ITaglibInfo[results.size()]);
 	}

 	/*
 	 * @see ITaglibRegistry#removeTaglibRegistryListener(ITaglibRegistryListener)
 	 */
 	public void removeTaglibRegistryListener(ITaglibRegistryListener listener) {
 		if (this.listeners == null)
 			return;
 		this.listeners.remove(listener);
 	}

 	/*
 	 * @see Object#toString()
 	 */
 	public String toString() {
 		StringBuffer sb = new StringBuffer();
 		sb.append("TaglibRegistry: \n"); //$NON-NLS-1$
 		for (Iterator iter = this.taglibs.iterator(); iter.hasNext();) {
 			ITaglibInfo taglib = (ITaglibInfo) iter.next();
 			sb.append("\t"); //$NON-NLS-1$
 			sb.append(taglib);
 			sb.append("\n"); //$NON-NLS-1$
 		}
 		return sb.toString();
 	}

 	protected void processDirectory(IResource resource) {
 		// do nothing
 	}

 	protected boolean shouldProcessDirectory(IResource resource) {
 		return true;
 	}

 	/**
 	 * @param resource
 	 */
 	protected void processFile(IResource resource) {
 		Vector existingTaglibs = getExistingTaglibs(resource.getProjectRelativePath());
 		ITaglibInfo[] newTaglibs = searchForTaglibs(resource);

 		for (int i = 0; i < newTaglibs.length; i++) {
 			ITaglibInfo newTaglib = newTaglibs[i];
 			int existingIndex = existingTaglibs.indexOf(newTaglib);
 			if (existingIndex >= 0) {
 				// If its an exact match, leave it in alone the taglibs registry
 				// but fire a taglibChangedEvent.
 				if (!newTaglib.isWebXMLEntry())
 					fireTaglibChanged(newTaglib);
 				existingTaglibs.remove(existingIndex);
 			} else {
 				// The taglib did not exist previously in the list, add it and
 				// fire a taglibAdded event.
 				addTaglib(newTaglib);
 				fireTaglibAdded(newTaglib);
 			}
 		}

 		for (Iterator iter = existingTaglibs.iterator(); iter.hasNext();) {
 			ITaglibInfo remainingTaglib = (ITaglibInfo) iter.next();
 			this.taglibs.remove(remainingTaglib);
 			fireTaglibRemoved(remainingTaglib);
 		}
 	}

 }
	/*******************************************************************************
	* Copyright (c) 2003, 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.jst.j2ee.internal.web.taglib.registry;

	import java.util.ArrayList;
	import java.util.Arrays;
	import java.util.HashSet;
	import java.util.Iterator;
	import java.util.List;
	import java.util.Set;
	import java.util.Vector;

	import org.eclipse.core.resources.IProject;
	import org.eclipse.core.resources.IResource;
	import org.eclipse.core.resources.IResourceDelta;
	import org.eclipse.core.resources.IResourceVisitor;
	import org.eclipse.core.runtime.CoreException;
	import org.eclipse.core.runtime.IPath;
	import org.eclipse.jem.util.logger.proxy.Logger;
	import org.eclipse.jst.j2ee.internal.project.IWebNatureConstants;
	import org.eclipse.jst.j2ee.internal.web.locator.WebProjectTaglibLocator;
	import org.eclipse.jst.j2ee.internal.web.locator.WebXMLTaglibLocator;
	import org.eclipse.jst.j2ee.internal.web.taglib.ITaglibInfo;
	import org.eclipse.jst.j2ee.internal.web.taglib.ITaglibLocator;
	import org.eclipse.jst.j2ee.internal.web.taglib.ITaglibRegistry;
	import org.eclipse.jst.j2ee.internal.web.taglib.ITaglibRegistryListener;


	/**
	* @version 1.0
	* @author
	*/
	abstract public class AbstractTaglibRegistry implements ITaglibRegistry {
	private static final boolean debug = false;

	protected IProject project;
	protected Vector listeners;
	protected Vector taglibs; // of type ITaglibInfo
	protected ITaglibLocator[] locators;
	protected boolean needsRefresh = false;

	public AbstractTaglibRegistry(IProject project) {
	this.project = project;
	initialize();
	refresh();
	}

	protected void initialize() {
	this.locators = new ITaglibLocator[]{new WebProjectTaglibLocator(this.project), new WebXMLTaglibLocator(this.project)};
	}

	/*
	* @see ITaglibRegistry#addTaglibRegistryListener(ITaglibRegistryListener)
	*/
	protected void addTaglib(ITaglibInfo taglib) {
	// Add web.xml entries at the top of the list so that they are
	// always returned first from the getTaglib(uri) method.
	if (taglib.isWebXMLEntry())
	this.taglibs.add(0, taglib);
	else
	this.taglibs.add(taglib);
	}

	public void addTaglibRegistryListener(ITaglibRegistryListener listener) {
	if (this.listeners == null)
	this.listeners = new Vector();
	this.listeners.add(listener);
	}

	/*
	* @see ITaglibRegistry#getTaglib(IPath)
	*/
	public ITaglibInfo[] getTaglibs(IPath location) {
	Vector results = getTaglibsVector(location);
	return (ITaglibInfo[]) results.toArray(new ITaglibInfo[results.size()]);
	}

	protected Vector getTaglibsVector(IPath location) {
	Vector results = new Vector();
	Vector tTaglibs = primGetTaglibs();

	boolean isWebXML = isWebXMLFile(location);

	// Start at the beginning of the taglib list and return the first
	// one that matches the location passed in.
	for (Iterator iter = tTaglibs.iterator(); iter.hasNext();) {
	ITaglibInfo taglib = (ITaglibInfo) iter.next();
	if (isWebXML) {
	if (taglib.isWebXMLEntry())
	results.add(taglib);
	} else if (taglib.getLocation().equals(location))
	results.add(taglib);
	}
	return results;
	}

	protected Vector getExistingTaglibs(IPath location) {
	Vector results = new Vector();
	Vector tTaglibs = this.taglibs;

	boolean isWebXML = isWebXMLFile(location);

	// Start at the beginning of the taglib list and return the first
	// one that matches the location passed in.
	for (Iterator iter = tTaglibs.iterator(); iter.hasNext();) {
	ITaglibInfo taglib = (ITaglibInfo) iter.next();
	if (isWebXML) {
	if (taglib.isWebXMLEntry())
	results.add(taglib);
	} else if (taglib.getLocation().equals(location) && !taglib.isWebXMLEntry())
	results.add(taglib);
	}
	return results;
	}

	public IProject getProject() {
	return this.project;
	}

	/*
	* @see ITaglibRegistry#getRecommendedTaglibs()
	*/
	public ITaglibInfo[] getRecommendedTaglibs() {
	// we pass false because we dont want to show all entries per resource,just one
	return getValidTaglibs(false);
	}

	/*
	* @see ITaglibRegistry#getVisibleTaglibs()
	*/
	public ITaglibInfo[] getVisibleTaglibs() {
	// we pass true because we want to show all entries that are valid uri's for a resource
	return getValidTaglibs(true);
	}


	protected ITaglibInfo[] getValidTaglibs(boolean showAllEntriesPerResource) {
	Vector allTaglibs = primGetTaglibs();
	Vector results = new Vector(allTaglibs.size());
	Set locationSet = new HashSet();
	Set uriSet = new HashSet();

	// first pass web.xml entries
	for (Iterator iter = allTaglibs.iterator(); iter.hasNext();) {
	ITaglibInfo iTaglib = (ITaglibInfo) iter.next();
	if (iTaglib.isWebXMLEntry()) {
	if (!uriSet.contains(iTaglib.getURI())) {
	// show all web.xml entries whether they are mapped to the same resource
	// if(showAllEntriesPerResource \|\|
	// !locationSet.contains(iTaglib.getLocation())){
	if (!locationSet.contains(iTaglib.getLocation()))
	locationSet.add(iTaglib.getLocation());
	results.add(iTaglib);
	// }
	uriSet.add(iTaglib.getURI());
	}
	}
	}

	// second pass uri in tld entries
	for (Iterator iter = allTaglibs.iterator(); iter.hasNext();) {
	ITaglibInfo iTaglib = (ITaglibInfo) iter.next();
	if (iTaglib.isURIFromTLD() && !iTaglib.isWebXMLEntry()) {
	if (!uriSet.contains(iTaglib.getURI())) {
	if (!iTaglib.isInJar()) {
	// i.e its a tld file in the web application
	if (showAllEntriesPerResource \|\| !locationSet.contains(iTaglib.getLocation())) {
	if (!locationSet.contains(iTaglib.getLocation()))
	locationSet.add(iTaglib.getLocation());
	results.add(iTaglib);
	}
	} else { // i.e its a tld file in a JAR file in the web application
	String jarRelativePath = iTaglib.getTLDLocation().toString();
	if (jarRelativePath.equalsIgnoreCase(IWebNatureConstants.META_INFO_DIRECTORY + "/taglib.tld")) { //$NON-NLS-1$
	if (!iTaglib.isServerContribution() // dont add META-INF/taglib.tld that
	// comes from a server
	&& (showAllEntriesPerResource \|\| !locationSet.contains(iTaglib.getLocation()))) {
	if (!locationSet.contains(iTaglib.getLocation()))
	locationSet.add(iTaglib.getLocation());
	results.add(iTaglib);
	}
	} else { // if not metainf/taglib.tld
	// we want to include all the non meta-inf entries in the results
	results.add(iTaglib);
	}
	}
	uriSet.add(iTaglib.getURI());
	} // if !uriSet.contains
	} // if .isURIFromTLD
	}

	// third pass for entries whose uri's are resource paths
	for (Iterator iter = allTaglibs.iterator(); iter.hasNext();) {
	ITaglibInfo iTaglib = (ITaglibInfo) iter.next();
	if (!iTaglib.isURIFromTLD() && !iTaglib.isWebXMLEntry() && !iTaglib.isDirectoryEntry()) {
	if (!uriSet.contains(iTaglib.getURI())) {
	if (showAllEntriesPerResource \|\| !locationSet.contains(iTaglib.getLocation())) {
	results.add(iTaglib);
	locationSet.add(iTaglib.getLocation());
	}
	}
	}
	}

	// fourth pass for entries whose uri's are resource paths & directory entries
	for (Iterator iter = allTaglibs.iterator(); iter.hasNext();) {
	ITaglibInfo iTaglib = (ITaglibInfo) iter.next();
	if (iTaglib.isDirectoryEntry()) {
	IPath directoryLoc = iTaglib.getLocation();
	if (!uriSet.contains(iTaglib.getURI())) {
	boolean canAdd = true;
	for (Iterator iterator = locationSet.iterator(); iterator.hasNext();) {
	IPath locationPath = (IPath) iterator.next();

	if (directoryLoc.matchingFirstSegments(locationPath) == locationPath.segmentCount() - 1) {
	canAdd = false;
	break;
	}
	}
	if (canAdd) {// don't add directories that have tld's in them
	results.add(iTaglib);
	locationSet.add(iTaglib.getLocation());
	}
	}
	}
	}


	return (ITaglibInfo[]) results.toArray(new ITaglibInfo[results.size()]);
	}

	protected Vector primGetTaglibs() {
	if (this.needsRefresh)
	refresh();
	return this.taglibs;
	}

	/*
	* @see ITaglibRegistry#getTaglibs()
	*/
	public ITaglibInfo[] getTaglibs() {
	Vector tTaglibs = primGetTaglibs();
	return (ITaglibInfo[]) tTaglibs.toArray(new ITaglibInfo[tTaglibs.size()]);
	}

	/*
	* @see ITaglibRegistry#getTaglib(String)
	*/
	public ITaglibInfo getTaglib(String uri) {
	List tTaglibs = Arrays.asList(getVisibleTaglibs());
	//commented out because we dont want to return the taglib for resources that are not
	// visible
	// or are not visible because of precedence //primGetTaglibs();
	for (Iterator iter = tTaglibs.iterator(); iter.hasNext();) {
	ITaglibInfo taglib = (ITaglibInfo) iter.next();
	if (taglib.getURI().equals(uri))
	return taglib;
	}
	return null;
	}

	protected void fireTaglibAdded(ITaglibInfo addedTaglib) {
	if (debug)
	System.out.println("TaglibRegistry: taglib added: " + addedTaglib); //$NON-NLS-1$

	if (this.listeners == null)
	return;
	for (Iterator iter = this.listeners.iterator(); iter.hasNext();) {
	ITaglibRegistryListener listener = (ITaglibRegistryListener) iter.next();
	listener.taglibAdded(addedTaglib);
	}
	}

	protected void fireTaglibChanged(ITaglibInfo changedTaglib) {
	if (debug)
	System.out.println("TaglibRegistry: taglib changed: " + changedTaglib); //$NON-NLS-1$

	if (this.listeners == null)
	return;
	for (Iterator iter = this.listeners.iterator(); iter.hasNext();) {
	ITaglibRegistryListener listener = (ITaglibRegistryListener) iter.next();
	listener.taglibChanged(changedTaglib);
	}
	}

	protected void fireTaglibRemoved(ITaglibInfo removedTaglib) {
	if (debug)
	System.out.println("TaglibRegistry: taglib removed: " + removedTaglib); //$NON-NLS-1$

	if (this.listeners == null)
	return;
	for (Iterator iter = this.listeners.iterator(); iter.hasNext();) {
	ITaglibRegistryListener listener = (ITaglibRegistryListener) iter.next();
	listener.taglibRemoved(removedTaglib);
	}
	}

	abstract protected boolean isWebXMLFile(IPath filePath);

	protected boolean isTaglibTLD(IPath tldPath) {
	return tldPath.lastSegment().equalsIgnoreCase("taglib.tld"); //$NON-NLS-1$
	}

	public void processResourceChanged(IResourceDelta delta) {
	int kind = delta.getKind();
	IResource resource = delta.getResource();
	int flags = delta.getFlags();
	if (delta.getKind() == IResourceDelta.CHANGED && flags == IResourceDelta.NO_CHANGE)
	return;

	// If the websettings file changed, refresh everything in case the context root
	// was modified or the J2EE level was changed.
	if (requiresFullUpdate(delta)) {
	updateAll();
	return;
	}
	// Make sure resource is not null
	if (resource == null)
	return;

	// Only process resource changes that are under the refreshRoot.
	IPath resourcePath = resource.getProjectRelativePath();

	IResource refreshRoot = getRefreshRoot();
	// RATLC00974251 for a java project before build is done, output location does not exist
	if (refreshRoot == null)
	return;

	IPath refreshPath = refreshRoot.getProjectRelativePath();
	if (resourcePath.matchingFirstSegments(refreshPath) != refreshPath.segmentCount())
	return;

	if (debug)
	System.out.println("TaglibRegistry(" + this.project.getName() + ").resourceChanged: " + delta); //$NON-NLS-1$ //$NON-NLS-2$

	if (kind == IResourceDelta.CHANGED \|\| kind == IResourceDelta.REPLACED) {
	handleResourceModified(resource);
	} else if (kind == IResourceDelta.REMOVED) {
	handleResourceRemoved(resource);
	} else if (kind == IResourceDelta.ADDED) {
	handleResourceAdded(resource);
	} else {
	if (debug)
	System.out.println("TaglibRegistry.resourceChanged: UNHANDLED DELTA TYPE"); //$NON-NLS-1$
	}
	}

	protected void handleResourceAdded(IResource resource) {
	handleResourceModified(resource);
	}

	protected void handleResourceModified(IResource resource) {
	try {
	resource.accept(new IResourceVisitor() {
	public boolean visit(IResource aresource) throws CoreException {
	if (aresource.getType() != IResource.ROOT && AbstractTaglibRegistry.this.project != aresource.getProject())
	return false;

	if (aresource.getType() == IResource.FILE) {
	processFile(aresource);
	return false;
	}
	if (shouldProcessDirectory(aresource)) {
	processDirectory(aresource);
	}
	return (canVisitResource(aresource));

	}


	});
	} catch (CoreException e) {
	Logger.getLogger().log(e);
	}
	}

	/**
	* Return true if the resource and its children should be visited
	*
	* @param resource
	* @return
	*/
	protected boolean canVisitResource(IResource resource) {
	if (resource.getType() != IResource.ROOT && this.project != resource.getProject())
	return false;
	if (resource.getType() != IResource.FILE)
	return true;
	return true;
	}

	protected void handleResourceRemoved(IResource resource) {
	IPath location = resource.getProjectRelativePath();
	ITaglibInfo[] removedTaglibs = removeTaglibs(location);
	if (removedTaglibs != null) {
	for (int i = 0; i < removedTaglibs.length; i++) {
	ITaglibInfo iTaglibInfo = removedTaglibs[i];
	if (debug)
	System.out.println("TaglibRegistry.handleResourceRemoved taglib removed: " + iTaglibInfo); //$NON-NLS-1$
	fireTaglibRemoved(iTaglibInfo);
	}
	}
	}

	protected IResource getRefreshRoot() {
	return getProject();
	}

	public void refresh() {
	this.taglibs = new Vector();
	IResource refreshRoot = getRefreshRoot();

	// RATLC00974251 for a java project before build is done, output location does not exist
	if (refreshRoot != null)
	handleResourceAdded(refreshRoot);

	this.needsRefresh = false;
	}

	protected void updateAll() {
	try {
	IResource refreshRoot = getRefreshRoot();

	// RATLC00974251 for a java project before build is done, output location does not exist
	if (refreshRoot == null)
	return;
	refreshRoot.accept(new IResourceVisitor() {
	public boolean visit(IResource resource) throws CoreException {
	handleResourceModified(resource);
	return true;
	}
	});
	} catch (CoreException e) {
	//Do nothing
	}
	}

	/**
	* Remove all the taglibs associated with the location.
	*
	* @param location
	* @return ITaglibInfo[] The taglibs that are removed. Null if none are removed.
	*/
	protected ITaglibInfo[] removeTaglibs(IPath location) {
	List results = new ArrayList();

	boolean isWebXML = isWebXMLFile(location);
	for (int i = 0; i < this.taglibs.size(); i++) {
	ITaglibInfo taglib = (ITaglibInfo) this.taglibs.get(i);
	if (isWebXML) {
	if (taglib.isWebXMLEntry()) {
	removeTaglib(i);
	results.add(taglib);
	i--;
	}
	} else if (taglib.getLocation().equals(location)) {
	removeTaglib(i);
	results.add(taglib);
	i--;
	}
	}
	return results.isEmpty() ? null : (ITaglibInfo[]) results.toArray(new ITaglibInfo[results.size()]);
	}

	abstract protected boolean requiresFullUpdate(IResourceDelta delta);

	protected void removeTaglib(int i) {
	this.taglibs.remove(i);
	}

	protected ITaglibInfo[] searchForTaglibs(IResource resource) {
	ArrayList results = new ArrayList();
	for (int i = 0; i < this.locators.length; i++) {
	ITaglibLocator tLocator = this.locators[i];
	ITaglibInfo[] tTaglibs = tLocator.search(resource);
	if (tTaglibs != null) {
	for (int j = 0; j < tTaglibs.length; j++) {
	results.add(tTaglibs[j]);
	}
	}
	}
	return (ITaglibInfo[]) results.toArray(new ITaglibInfo[results.size()]);
	}

	/*
	* @see ITaglibRegistry#removeTaglibRegistryListener(ITaglibRegistryListener)
	*/
	public void removeTaglibRegistryListener(ITaglibRegistryListener listener) {
	if (this.listeners == null)
	return;
	this.listeners.remove(listener);
	}

	/*
	* @see Object#toString()
	*/
	public String toString() {
	StringBuffer sb = new StringBuffer();
	sb.append("TaglibRegistry: \n"); //$NON-NLS-1$
	for (Iterator iter = this.taglibs.iterator(); iter.hasNext();) {
	ITaglibInfo taglib = (ITaglibInfo) iter.next();
	sb.append("\t"); //$NON-NLS-1$
	sb.append(taglib);
	sb.append("\n"); //$NON-NLS-1$
	}
	return sb.toString();
	}

	protected void processDirectory(IResource resource) {
	// do nothing
	}

	protected boolean shouldProcessDirectory(IResource resource) {
	return true;
	}

	/**
	* @param resource
	*/
	protected void processFile(IResource resource) {
	Vector existingTaglibs = getExistingTaglibs(resource.getProjectRelativePath());
	ITaglibInfo[] newTaglibs = searchForTaglibs(resource);

	for (int i = 0; i < newTaglibs.length; i++) {
	ITaglibInfo newTaglib = newTaglibs[i];
	int existingIndex = existingTaglibs.indexOf(newTaglib);
	if (existingIndex >= 0) {
	// If its an exact match, leave it in alone the taglibs registry
	// but fire a taglibChangedEvent.
	if (!newTaglib.isWebXMLEntry())
	fireTaglibChanged(newTaglib);
	existingTaglibs.remove(existingIndex);
	} else {
	// The taglib did not exist previously in the list, add it and
	// fire a taglibAdded event.
	addTaglib(newTaglib);
	fireTaglibAdded(newTaglib);
	}
	}

	for (Iterator iter = existingTaglibs.iterator(); iter.hasNext();) {
	ITaglibInfo remainingTaglib = (ITaglibInfo) iter.next();
	this.taglibs.remove(remainingTaglib);
	fireTaglibRemoved(remainingTaglib);
	}
	}

	}