Java tutorial
/* * Copyright 2009-2010 TauNova (http://taunova.com). All rights reserved. * * This file is subject to the terms and conditions defined in * file 'LICENSE.txt', which is part of this source code package. */ package com.taunova.app.libview; import com.taunova.app.libview.command.FolderItemCommand; import com.taunova.app.libview.command.PngItemCommand; import org.apache.commons.io.FilenameUtils; import java.io.File; import java.util.HashMap; import java.util.Map; /** * * @author Artem */ public class DefaultCommandRegistry implements CommandRegistry { protected Map<String, ItemCommand> registry = new HashMap(); public DefaultCommandRegistry() { } public void addCommand(ItemCommand command) { registry.put(command.getType(), command); } public boolean containsCommand(File file) { return registry.containsKey(getExtension(file)); } public ItemCommand getCommand(File file) { return registry.get(getExtension(file)); } protected String getExtension(File file) { return (file.isFile()) ? FilenameUtils.getExtension(file.getName()) : "folder"; } }