/**
    * Copyright 2010-2014 The Kuali Foundation
    *
    * Licensed under the Educational Community License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    * http://www.opensource.org/licenses/ecl2.php
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.kuali.common.util.main;
  
  import java.util.Collections;
  import java.util.Map;
  
  import org.kuali.common.util.spring.SpringExecutable;
  import org.kuali.common.util.spring.service.SpringContext;
  import org.kuali.common.util.spring.service.SpringService;
  
  public class MainUtils {
  
  	public static final String MAIN_CONTEXT_BEAN_NAME = "mainContext";
  	public static final String MAIN_PROFILE_NAME = "main";
  
  	/**
  	 * Load the @Configuration <code>mainClass</code> using Spring and then terminate the JVM.
  	 */
  	public static void runAndExit(Class<?> mainClass, String[] args) {
  		runAndExit(mainClass, args, false);
  	}
  
  	/**
  	 * Load the @Configuration <code>mainClass</code> using Spring and then terminate the JVM.
  	 */
  	public static void runAndExit(Class<?> mainClass, String[] args, boolean stacktrace) {
  		run(mainClass, args, stacktrace, true);
  	}
  
  	/**
  	 * Load the @Configuration <code>mainClass</code> using Spring
  	 */
  	public static void run(Class<?> mainClass, String[] args, boolean stacktrace) {
  		run(mainClass, args, stacktrace, false);
  	}
  
  	/**
  	 * Load the @Configuration <code>mainClass</code> using Spring
  	 */
  	public static void run(Class<?> mainClass, String[] args) {
  		run(mainClass, args, true, false);
  	}
  
  	/**
  	 * 
  	 */
  	public static void run(Class<?> mainClass, String[] args, boolean stacktrace, boolean exit) {
  		try {
  			// Preserve the context info from the class where main(String[] args) was invoked
  			MainContext mainContext = new MainContext(mainClass, args);
  
  			// Create a map containing the context so we can register it with Spring
  			Map<String, Object> beans = Collections.singletonMap(MAIN_CONTEXT_BEAN_NAME, (Object) mainContext);
  
  			// Create a SpringContext using the map and main class, with 1 active profile called "main"
  			SpringContext context = new SpringContext(beans, mainClass, MAIN_PROFILE_NAME);
  
  			// DefaultSpringService does what we need
  			SpringService service = SpringExecutable.DEFAULT_SPRING_SERVICE;
  
  			// This causes Spring to load the @Configuration annotated main class
  			new SpringExecutable(service, context).execute();
  
  			// Exit with zero if there is no exception
  			if (exit) {
  				System.exit(Status.SUCCESS.getValue());
  			}
  		} catch (Exception e) {
  			handleException(e, stacktrace, exit);
  		}
  	}
  
  	protected static void handleException(Exception e, boolean stacktrace, boolean exit) {
  		if (stacktrace) {
  			e.printStackTrace();
  		} else {
  			System.err.print(e.getMessage());
  		}
  		if (exit) {
  			System.exit(Status.FAILURE.getValue());
  		}
  	}
  
  }