ScannerURLS.java

/*
 * Copyright 2011 cruxframework.org.
 * 
 * Licensed under the Apache 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.apache.org/licenses/LICENSE-2.0
 * 
 * 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.cruxframework.crux.scanner;

import java.net.URL;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;


/**
 * 
 * @author Thiago da Rosa de Bustamante
 *
 */
public class ScannerURLS 
{
	static URL[] urls;
	private static final Lock lock = new ReentrantLock();
	
	/**
	 * 
	 */
	private ScannerURLS()
	{
		
	}
	
	/**
	 * 
	 * @param urls
	 */
	public static void setURLsForSearch(URL[] urls)
	{
		lock.lock();
		try
		{
			ScannerURLS.urls = urls;
		}
		finally
		{
			lock.unlock();
		}
	}

	/**
	 * 
	 * @return
	 */
	public static URL[] getURLsForSearch()
	{
		if (urls != null) return urls;
		lock.lock();
		if (urls != null) return urls;
		try
		{
			urls = ClasspathUrlFinder.findClassPaths();
		}
		finally
		{
			lock.unlock();
		}
		
		return urls;
	}
}