001/*
002 * Copyright (C) 2012 eXo Platform SAS.
003 *
004 * This is free software; you can redistribute it and/or modify it
005 * under the terms of the GNU Lesser General Public License as
006 * published by the Free Software Foundation; either version 2.1 of
007 * the License, or (at your option) any later version.
008 *
009 * This software is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * You should have received a copy of the GNU Lesser General Public
015 * License along with this software; if not, write to the Free
016 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
017 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
018 */
019
020package org.crsh.util;
021
022import org.crsh.plugin.PluginContext;
023import org.crsh.plugin.ResourceKind;
024import org.crsh.vfs.Resource;
025
026import java.util.Map;
027import java.util.concurrent.ConcurrentHashMap;
028
029public class ClassCache<T> extends AbstractClassCache<T> {
030
031  /** . */
032  private final Map<String, TimestampedObject<Class<? extends T>>> classes = new ConcurrentHashMap<String, TimestampedObject<Class<? extends T>>>();
033
034  /** . */
035  private final PluginContext context;
036
037  /** . */
038  private final ResourceKind kind;
039
040  public ClassCache(PluginContext context, ClassFactory<T> classFactory, ResourceKind kind) {
041    super(classFactory);
042
043    //
044    this.context = context;
045    this.kind = kind;
046  }
047
048  @Override
049  protected TimestampedObject<Class<? extends T>> loadClass(String name) {
050    return classes.get(name);
051  }
052
053  @Override
054  protected void saveClass(String name, TimestampedObject<Class<? extends T>> clazz) {
055    classes.put(name, clazz);
056  }
057
058  @Override
059  protected Resource getResource(String name) {
060    return context.loadResource(name, kind);
061  }
062}