/*

  * Copyright 2005-2007 The Kuali Foundation

  * 

  * 

  * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php

  * 

  * 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.kuali.rice.kew.plugin;

 import java.io.FileNotFoundException;

 import java.io.IOException;

 import javax.xml.namespace.QName;

 import org.kuali.rice.core.config.ConfigContext;

 import org.kuali.rice.core.resourceloader.ResourceLoader;

 import org.kuali.rice.kew.exception.InvalidXmlException;

 /**

  * A {@link PluginLoader} which creates a {@link Plugin} with the given ClassLoader.

  * 

  * <p>This PluginLoader is used in the cases where the Plugin's ClassLoader was created 

  * by the calling code and doesn't need to be created by the loader.

  * 

  * @see Plugin

  *

  * @author Kuali Rice Team (rice.collab@kuali.org)

  */

 public class ClassLoaderPluginLoader implements PluginLoader {

         private String pluginConfigPath;

         private ClassLoader classLoader;

         public ClassLoaderPluginLoader(ClassLoader classLoader) {

                 this.classLoader = classLoader;

         }

         public String getPluginName() {

             return ResourceLoader.EMBEDDED_PLUGIN;

         }

         public Plugin load() throws Exception {

                 //for now default the embedded plugin to the M.E. of the current context

                 QName name = new QName(ConfigContext.getCurrentContextConfig().getServiceNamespace(), ResourceLoader.EMBEDDED_PLUGIN);

                 Plugin plugin = new Plugin(name, loadPluginConfig(pluginConfigPath), classLoader);

                 plugin.bindThread();

                 try {

                         PluginUtils.installResourceLoader(plugin);

                         PluginUtils.installPluginListeners(plugin);

                 } finally {

                         plugin.unbindThread();

                 }

                 return plugin;

         }

         public void setPluginConfigPath(String pluginConfigPath) {

                 this.pluginConfigPath = pluginConfigPath;

         }

         public boolean isRemoved() {

                 return false;

         }

         public boolean isModified() {

                 return false;

         }

     private PluginConfig loadPluginConfig(String pluginConfigPath) {

         PluginConfigParser parser = new PluginConfigParser();

         try {

             PluginConfig pluginConfig  = parser.parse(classLoader.getResource(pluginConfigPath), ConfigContext.getCurrentContextConfig());

             pluginConfig.parseConfig();

             return pluginConfig;

         } catch (FileNotFoundException e) {

             throw new PluginException("Could not locate the plugin config file at path " + pluginConfigPath, e);

         } catch (IOException ioe) {

             throw new PluginException("Could not read the plugin config file", ioe);

         } catch (InvalidXmlException ixe) {

             throw new PluginException("Could not parse the plugin config file", ixe);

         }

     }

 }