Package org.eclipse.ecf.provider.irc.bot

Source Code of org.eclipse.ecf.provider.irc.bot.Activator

/*******************************************************************************
* Copyright (c) 2007 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
*     IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.ecf.provider.irc.bot;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtensionRegistry;
import org.eclipse.ecf.provider.irc.bot.handler.ICommandHandler;
import org.eclipse.ecf.provider.irc.internal.bot.BotEntry;
import org.eclipse.ecf.provider.irc.internal.bot.CommandEntry;
import org.eclipse.ecf.provider.irc.internal.bot.IBotEntry;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.util.tracker.ServiceTracker;

/**
* The activator class controls the plug-in life cycle
*/
public class Activator implements BundleActivator {

  // The plug-in ID
  public static final String PLUGIN_ID = "org.eclipse.ecf.provider.irc.bot";

  // The shared instance
  private static Activator plugin;

  private ServiceTracker extensionRegistryTracker = null;

  private Map bots = new HashMap();
  private Map commands = new HashMap();

  /**
   * The constructor
   */
  public Activator() {
  }

  public IExtensionRegistry getExtensionRegistry() {
    return (IExtensionRegistry) extensionRegistryTracker.getService();
  }

  /*
   * (non-Javadoc)
   * @see org.eclipse.core.runtime.Plugins#start(org.osgi.framework.BundleContext)
   */
  public void start(BundleContext context) throws Exception {
    plugin = this;
    this.extensionRegistryTracker = new ServiceTracker(context,
        IExtensionRegistry.class.getName(), null);
    this.extensionRegistryTracker.open();
    loadExtensions();
  }

  /*
   * (non-Javadoc)
   * @see org.eclipse.core.runtime.Plugin#stop(org.osgi.framework.BundleContext)
   */
  public void stop(BundleContext context) throws Exception {
    if (extensionRegistryTracker != null) {
      extensionRegistryTracker.close();
      extensionRegistryTracker = null;
    }
    plugin = null;
  }

  /**
   * Returns the shared instance
   *
   * @return the shared instance
   */
  public static Activator getDefault() {
    return plugin;
  }

  public Map getBots() {
    return this.bots;
  }


  private void loadExtensions() throws CoreException {
    // load the command handlers
    IExtensionRegistry reg = getExtensionRegistry();
    if (reg != null) {
      IConfigurationElement[] elements = reg.getConfigurationElementsFor("org.eclipse.ecf.provider.irc.bot.commandHandler");
      for(int i = 0; i < elements.length; i++) {
        String id = elements[i].getAttribute("botId");
        String expression = elements[i].getAttribute("expression");
        ICommandHandler handler = (ICommandHandler) elements[i].createExecutableExtension("class");
        List c = (List) commands.get(id);
        if(c == null) {
          c = new ArrayList();
          c.add(new CommandEntry(expression, handler));
          commands.put(id, c);
        } else {
          c.add(new CommandEntry(expression, handler));
          commands.put(id, c);
        }
      }
 
      // load the bots
      elements = reg.getConfigurationElementsFor("org.eclipse.ecf.provider.irc.bot.ircbot");
      for(int i = 0; i < elements.length; i++) {
        String id = elements[i].getAttribute("id");
        String name = elements[i].getAttribute("name");
        String server = elements[i].getAttribute("server");
        String channel = elements[i].getAttribute("channel");
        List c = (List) commands.get(id);
        if(c == null)
          c = new ArrayList();
        IBotEntry bot = new BotEntry(id, name, server, channel, c);
        bots.put(id, bot);
      }
    }

  }

}
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