| /* |
| * 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.autoupdate.services; |
| |
| import java.beans.PropertyChangeEvent; |
| import java.beans.PropertyChangeListener; |
| import java.util.HashMap; |
| import java.util.Map; |
| import javax.swing.event.ChangeListener; |
| import org.openide.modules.ModuleInfo; |
| import org.openide.util.ChangeSupport; |
| import org.openide.util.Lookup; |
| import org.openide.util.LookupEvent; |
| import org.openide.util.LookupListener; |
| |
| /** Checks and caches code name base to module info mapping. |
| * |
| * @author Jirka Rechtacek |
| */ |
| final class ModuleCache |
| implements PropertyChangeListener, LookupListener { |
| private static ModuleCache INSTANCE; |
| |
| private final Lookup.Result<ModuleInfo> result; |
| private final ChangeSupport support; |
| private Map<String,ModuleInfo> infos; |
| |
| private ModuleCache() { |
| support = new ChangeSupport(this); |
| result = Lookup.getDefault().lookupResult(ModuleInfo.class); |
| result.addLookupListener(this); |
| resultChanged(null); |
| } |
| |
| public static synchronized ModuleCache getInstance () { |
| if (INSTANCE == null) { |
| INSTANCE = new ModuleCache(); |
| } |
| return INSTANCE; |
| } |
| |
| public void addChangeListener(ChangeListener l) { |
| support.addChangeListener(l); |
| } |
| public void removeChangeListener(ChangeListener l) { |
| support.removeChangeListener(l); |
| } |
| |
| public ModuleInfo find(String cnb) { |
| return infos.get(cnb); |
| } |
| |
| @Override |
| public void resultChanged(LookupEvent ev) { |
| for (ModuleInfo m : result.allInstances()) { |
| m.removePropertyChangeListener(this); |
| m.addPropertyChangeListener(this); |
| } |
| Map<String,ModuleInfo> tmp = new HashMap<String,ModuleInfo>(); |
| for (ModuleInfo mi : result.allInstances()) { |
| tmp.put(mi.getCodeNameBase(), mi); |
| } |
| infos = tmp; |
| if (ev != null) { |
| fireChange(); |
| } |
| } |
| @Override |
| public void propertyChange(PropertyChangeEvent evt) { |
| if (ModuleInfo.PROP_ENABLED.equals(evt.getPropertyName())) { |
| ModuleInfo mi = (ModuleInfo)evt.getSource(); |
| |
| /* |
| fireChange(); |
| if (mi.isEnabled()) { |
| enabledCnbs.add(mi.getCodeNameBase()); |
| } else { |
| enabledCnbs.remove(mi.getCodeNameBase()); |
| } |
| */ |
| } |
| } |
| |
| private void fireChange() { |
| support.fireChange(); |
| } |
| |
| } |