| /** |
| * Copyright (c) 2002 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM - Initial API and implementation |
| * Jens Lukowski/Innoopract - initial renaming/restructuring |
| * |
| */ |
| package org.eclipse.wst.common.uriresolver.internal; |
| |
| import java.util.List; |
| |
| import org.eclipse.core.runtime.Platform; |
| import org.eclipse.wst.common.uriresolver.internal.provisional.URIResolverExtension; |
| import org.osgi.framework.Bundle; |
| |
| /** |
| * A URI resolver extension descriptor contains all the information about |
| * an extension URI resolver. The information contained allows for the |
| * extension resolver to be instantiated and called at the correct times. |
| */ |
| public class URIResolverExtensionDescriptor |
| { |
| protected URIResolverExtension resolver; |
| |
| protected String fileType; |
| |
| protected String className; |
| |
| public List projectNatureIds; |
| |
| protected String resourceType; |
| |
| protected int stage = URIResolverExtensionRegistry.STAGE_POSTNORMALIZATION; |
| |
| protected String priority = URIResolverExtensionRegistry.PRIORITY_MEDIUM; |
| |
| protected String pluginId; |
| |
| protected boolean error; |
| |
| /** |
| * Constructor. |
| * |
| * @param className The extension URI resolver class name. |
| * @param pluginId The ID of the plugin that contains the extension URI resolver class. |
| * @param projectNatureIds The project nature IDs for which the resolver should run. |
| * @param resourceType The type of resource for which the resolver should run. |
| * @param stage The stage of the resolver. Either prenormalization or postnormalization. |
| * @param priority The resolver's priority. high, medium, or low. |
| */ |
| public URIResolverExtensionDescriptor(String className, String pluginId, |
| List projectNatureIds, String resourceType, int stage, String priority) |
| { |
| this.className = className; |
| this.pluginId = pluginId; |
| this.projectNatureIds = projectNatureIds; |
| this.resourceType = resourceType; |
| this.stage = stage; |
| this.priority = priority; |
| } |
| |
| /** |
| * Get the extension URI resolver. |
| * |
| * @return The extension URI resolver. |
| */ |
| public URIResolverExtension getResolver() |
| { |
| |
| if (resolver == null && className != null && !error) |
| { |
| try |
| { |
| // Class theClass = classLoader != null ? |
| // classLoader.loadClass(className) : Class.forName(className); |
| Bundle bundle = Platform.getBundle(pluginId); |
| Class theClass = bundle.loadClass(className); |
| resolver = (URIResolverExtension) theClass.newInstance(); |
| } catch (Exception e) |
| { |
| error = true; |
| e.printStackTrace(); |
| } |
| } |
| return resolver; |
| } |
| |
| /** |
| * Determines if the resolver should run in the current scenario given |
| * the project nature ID, resource type, and stage. |
| * |
| * @param projectNatureId The project nature ID to check against. |
| * @param resourceType The resource type to check against. |
| * @param stage The stage to check against. |
| * @return True if the resolver should run, false otherwise. |
| */ |
| public boolean matches(String projectNatureId, String resourceType, int stage) |
| { |
| if (projectNatureIds.contains(projectNatureId)) |
| { |
| return matches(this.resourceType, resourceType) && this.stage == stage; |
| } |
| return false; |
| } |
| |
| /** |
| * Determines if string a matches string b. |
| * TODO: Why is this required instead of just using String.equals? |
| * |
| * @param a String for comparison. |
| * @param b String for comparison. |
| * @return True if the strings match, false otherwise. |
| */ |
| private boolean matches(String a, String b) |
| { |
| return (a != null) ? a.equals(b) : a == b; |
| } |
| } |