/plugins/org.jnario.ui/src/org/jnario/ui/internal/JnarioActivator.java

/*******************************************************************************

 * Copyright (c) 2012 BMW Car IT 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

 *******************************************************************************/

package org.jnario.ui.internal;



import org.apache.log4j.Logger;

import org.eclipse.ui.plugin.AbstractUIPlugin;

import org.eclipse.xtext.ui.shared.SharedStateModule;

import org.eclipse.xtext.util.Modules2;

import org.jnario.ui.JnarioUiModule;

import org.osgi.framework.BundleContext;



import com.google.inject.Guice;

import com.google.inject.Injector;

import com.google.inject.Module;



public class JnarioActivator extends AbstractUIPlugin {

	

	private static JnarioActivator INSTANCE;

	private static final Logger logger = Logger.getLogger(JnarioActivator.class);

	private Injector injector;



	@Override

	public void start(BundleContext context) throws Exception {

		super.start(context);

		INSTANCE = this;

	}

	

	@Override

	public void stop(BundleContext context) throws Exception {

		injector = null;

		INSTANCE = null;

		super.stop(context);

	}

	

	public static JnarioActivator getInstance() {

		return INSTANCE;

	}

	

	public synchronized Injector getInjector() {

		if (injector == null) {

			injector = createInjector();

		}

		return injector;

	}

	

	protected Injector createInjector() {

		try {

			Module sharedStateModule = getSharedStateModule();

			Module jnarioModule = new JnarioUiModule(this);

			return Guice.createInjector(Modules2.mixin(jnarioModule, sharedStateModule));

		} catch (Exception e) {

			logger.error("Failed to create injector for jnario");

			logger.error(e.getMessage(), e);

			throw new RuntimeException("Failed to create injector for jnario", e);

		}

	}



	protected Module getSharedStateModule() {

		return new SharedStateModule();

	}

}