/*******************************************************************************
 * Copyright (c) 2012-2015 INRIA.
 * 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:
 *     Generoso Pagano - initial API and implementation
 ******************************************************************************/
/**
 * 
 */
package fr.inria.soctrace.test.junit.utils;

import fr.inria.soctrace.lib.model.Tool;
import fr.inria.soctrace.lib.model.Trace;
import fr.inria.soctrace.lib.model.utils.SoCTraceException;
import fr.inria.soctrace.lib.search.ITraceSearch;
import fr.inria.soctrace.lib.search.TraceSearch;
import fr.inria.soctrace.test.junit.utils.importer.VirtualImporter;

/**
 * Loader for resources generated by the PrepareTestResource
 * program.
 * 
 * @author "Generoso Pagano <generoso.pagano@inria.fr>"
 */
public class ResourceLoader {
	
	private static Tool virtualImporterTool = null;
	private static Tool junitTool = null;
	private static Trace processedTrace = null;
	private static Trace testTrace = null;
	
	/**
	 * Static getter for Virtual Importer Tool
	 */
	public static Tool getVirtualImporterTool() {
		if (virtualImporterTool != null)
			return virtualImporterTool;
		loadAll();
		return virtualImporterTool;
	}

	/**
	 * Static getter for JUnit Dummy Tool
	 */
	public static Tool getJunitTestTool() {
		if (junitTool != null)
			return junitTool;
		loadAll();
		return junitTool;
	}

	/**
	 * Static getter for JUnit Dummy Processed Trace
	 */
	public static Trace getJunitProcessedTrace() {
		if (processedTrace != null)
			return processedTrace;
		loadAll();
		return processedTrace;
	}
	
	/**
	 * Static getter for JUnit Test Virtual Trace
	 */
	public static Trace getVirtualTrace() {
		if (testTrace != null)
			return testTrace;
		loadAll();
		return testTrace;
	}
	
	/**
	 * Load all default model elements from DBs.
	 * Do it once to minimize search interface overhead.
	 */
	private static void loadAll() {
		try {
			ITraceSearch search = new TraceSearch().initialize();
			if (testTrace == null)
				testTrace = search.getTraceByDBName(VirtualImporter.DB_NAME);
			if (processedTrace == null)
				processedTrace = search.getTraceByDBName(TestConstants.PROCESSED_TRACE_DB_NAME);
			if (virtualImporterTool == null) 
				virtualImporterTool = search.getToolByName(TestConstants.VIRTUAL_IMPORTER_TOOL_NAME);
			if (junitTool == null) 
				junitTool = search.getToolByName(TestConstants.JUNIT_TEST_TOOL_NAME);
			search.uninitialize();
		} catch (SoCTraceException e) {
			e.printStackTrace();
		}		
	}

}