ReqspecActivator.java

/**
 * Copyright (c) 2004-2025 Carnegie Mellon University and others. (see Contributors file). 
 * All Rights Reserved.
 * 
 * NO WARRANTY. ALL MATERIAL IS FURNISHED ON AN "AS-IS" BASIS. CARNEGIE MELLON UNIVERSITY MAKES NO WARRANTIES OF ANY
 * KIND, EITHER EXPRESSED OR IMPLIED, AS TO ANY MATTER INCLUDING, BUT NOT LIMITED TO, WARRANTY OF FITNESS FOR PURPOSE
 * OR MERCHANTABILITY, EXCLUSIVITY, OR RESULTS OBTAINED FROM USE OF THE MATERIAL. CARNEGIE MELLON UNIVERSITY DOES NOT
 * MAKE ANY WARRANTY OF ANY KIND WITH RESPECT TO FREEDOM FROM PATENT, TRADEMARK, OR COPYRIGHT INFRINGEMENT.
 * 
 * This program and the accompanying materials are made available under the terms of the Eclipse Public License 2.0
 * which is available at https://www.eclipse.org/legal/epl-2.0/
 * SPDX-License-Identifier: EPL-2.0
 * 
 * Created, in part, with funding and support from the United States Government. (see Acknowledgments file).
 * 
 * This program includes and/or can make use of certain third party source code, object code, documentation and other
 * files ("Third Party Software"). The Third Party Software that is used by this program is dependent upon your system
 * configuration. By using this program, You agree to comply with any and all relevant Third Party Software terms and
 * conditions contained in any such Third Party Software or separate license file distributed with such Third Party
 * Software. The parties who own the Third Party Software ("Third Party Licensors") are intended third party benefici-
 * aries to this license with respect to the terms applicable to their Third Party Software. Third Party Software li-
 * censes only apply to the Third Party Software and not any other portion of this program or this program as a whole.
 */
package org.osate.reqspec.ui.internal;

import com.google.common.collect.Maps;
import com.google.inject.Guice;
import com.google.inject.Injector;
import java.util.Collections;
import java.util.Map;
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.osate.reqspec.ReqSpecRuntimeModule;
import org.osate.reqspec.ui.ReqSpecUiModule;
import org.osgi.framework.BundleContext;

/**
 * This class was generated. Customizations should only happen in a newly
 * introduced subclass. 
 */
public class ReqspecActivator extends AbstractUIPlugin {

	public static final String PLUGIN_ID = "org.osate.reqspec.ui";
	public static final String ORG_OSATE_REQSPEC_REQSPEC = "org.osate.reqspec.ReqSpec";
	
	private static final Logger logger = Logger.getLogger(ReqspecActivator.class);
	
	private static ReqspecActivator INSTANCE;
	
	private Map<String, Injector> injectors = Collections.synchronizedMap(Maps.<String, Injector> newHashMapWithExpectedSize(1));
	
	@Override
	public void start(BundleContext context) throws Exception {
		super.start(context);
		INSTANCE = this;
	}
	
	@Override
	public void stop(BundleContext context) throws Exception {
		injectors.clear();
		INSTANCE = null;
		super.stop(context);
	}
	
	public static ReqspecActivator getInstance() {
		return INSTANCE;
	}
	
	public Injector getInjector(String language) {
		synchronized (injectors) {
			Injector injector = injectors.get(language);
			if (injector == null) {
				injectors.put(language, injector = createInjector(language));
			}
			return injector;
		}
	}
	
	protected Injector createInjector(String language) {
		try {
			com.google.inject.Module runtimeModule = getRuntimeModule(language);
			com.google.inject.Module sharedStateModule = getSharedStateModule();
			com.google.inject.Module uiModule = getUiModule(language);
			com.google.inject.Module mergedModule = Modules2.mixin(runtimeModule, sharedStateModule, uiModule);
			return Guice.createInjector(mergedModule);
		} catch (Exception e) {
			logger.error("Failed to create injector for " + language);
			logger.error(e.getMessage(), e);
			throw new RuntimeException("Failed to create injector for " + language, e);
		}
	}
	
	protected com.google.inject.Module getRuntimeModule(String grammar) {
		if (ORG_OSATE_REQSPEC_REQSPEC.equals(grammar)) {
			return new ReqSpecRuntimeModule();
		}
		throw new IllegalArgumentException(grammar);
	}
	
	protected com.google.inject.Module getUiModule(String grammar) {
		if (ORG_OSATE_REQSPEC_REQSPEC.equals(grammar)) {
			return new ReqSpecUiModule(this);
		}
		throw new IllegalArgumentException(grammar);
	}
	
	protected com.google.inject.Module getSharedStateModule() {
		return new SharedStateModule();
	}
	
	
}