/*

 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the License "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description: 

 *

 */

package com.nokia.carbide.cpp.internal.pi.manager;

import java.util.Enumeration;

import java.util.Vector;

import com.nokia.carbide.cpp.internal.pi.plugin.model.AbstractPiPlugin;

import com.nokia.carbide.cpp.internal.pi.plugin.model.ITrace;

import com.nokia.carbide.cpp.pi.util.GeneralMessages;

public class PluginRegistry 

{

	private static PluginRegistry pluginRegistry = null;

	private Vector<AbstractPiPlugin> plugins;

	private PluginRegistry()

	{

		plugins = new Vector<AbstractPiPlugin>();

	}

	public static PluginRegistry getInstance()

	{

		if (pluginRegistry != null)

			return pluginRegistry;

		else

		{

			pluginRegistry = new PluginRegistry();

			return pluginRegistry;

		}

	}

	protected void addRegistryEntry(AbstractPiPlugin plugin)

	{

		if (plugin instanceof ITrace)

		{

			ITrace testPlugin = (ITrace) plugin;

			if (testPlugin.getTraceId() == 1)

			{

				// This is a workaround.

				// must have GPP run first because ITT

				// parsing assume the symbolparser of GPP

				// is already registered, which in turn 

				// register during GPP parsing

				plugins.add(0, plugin);

				return;

			} else {

				int index = plugins.size() > 0 ? plugins.size() - 1 : 0;

				for (int i = 0; i < plugins.size(); i++) {

					AbstractPiPlugin thisPlugin = plugins.get(i);

					if (thisPlugin instanceof ITrace) {

						if (testPlugin.getTraceId() > ((ITrace)thisPlugin).getTraceId()) {

							index = i + 1;

							continue;

						} else if (testPlugin.getTraceId() < ((ITrace)thisPlugin).getTraceId()) {

							index = i;	// found insert location

							break;

						} else if (testPlugin.getTraceId() == 4) {

							// priority before memory for 4

							if (((ITrace)thisPlugin).getTraceName().equals("Memory")) {	//$NON-NLS-1$

								index = i;

								break;

							} else {

								index = i + 1;

								break;

							}

						} else {

							// only priority and memory share ID = 4

							GeneralMessages.showErrorMessage(Messages.getString("PluginRegistry.DuplicatedTraceID")); //$NON-NLS-1$

						}

					}

				}

				plugins.insertElementAt(plugin, index);

				return;

			}

		}

		plugins.add(plugin);

	}

	public Enumeration<AbstractPiPlugin> getRegistryEntries()

	{

		return plugins.elements();

	}

	public int getRegistrySize()

	{

		return plugins.size();

	}

}