| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.netbeans.modules.projectimport.eclipse.core; |
| |
| import java.io.File; |
| import java.lang.ref.WeakReference; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| /** |
| * Able to load and fill up an <code>EclipseWorkspace</code> from an Eclipse |
| * workspace directory using a .workspace and .classpath file and eventually |
| * passed workspace. It is also able to load a basic information from workspace. |
| * |
| * @author mkrauskopf |
| */ |
| public final class WorkspaceFactory { |
| |
| private static Map<File, WeakReference<Workspace>> cache = new HashMap<File, WeakReference<Workspace>>(); |
| |
| /** singleton */ |
| private static WorkspaceFactory instance = new WorkspaceFactory(); |
| |
| private WorkspaceFactory() {/*empty constructor*/} |
| |
| public static WorkspaceFactory getInstance() { |
| return instance; |
| } |
| |
| public void resetCache() { |
| cache = new HashMap<File, WeakReference<Workspace>>(); |
| } |
| /** |
| * Loads a workspace contained in the given <code>workspaceDir</code>. |
| * |
| * @throws InvalidWorkspaceException if workspace in the given |
| * <code>workspaceDir</code> is not a valid Eclipse workspace. |
| */ |
| public Workspace load(File workspaceDir) throws ProjectImporterException { |
| WeakReference<Workspace> wr = cache.get(workspaceDir); |
| Workspace w = wr != null ? wr.get() : null; |
| if (w == null) { |
| Workspace workspace = Workspace.createWorkspace(workspaceDir); |
| if (workspace != null) { |
| WorkspaceParser parser = new WorkspaceParser(workspace); |
| parser.parse(); |
| cache.put(workspaceDir, new WeakReference<Workspace>(workspace)); |
| w = workspace; |
| } |
| } |
| return w; |
| } |
| } |