michael@18: /**
michael@18:  * Copyright (c) 2012, Ben Fortuna
michael@18:  * All rights reserved.
michael@18:  *
michael@18:  * Redistribution and use in source and binary forms, with or without
michael@18:  * modification, are permitted provided that the following conditions
michael@18:  * are met:
michael@18:  *
michael@18:  *  o Redistributions of source code must retain the above copyright
michael@18:  * notice, this list of conditions and the following disclaimer.
michael@18:  *
michael@18:  *  o Redistributions in binary form must reproduce the above copyright
michael@18:  * notice, this list of conditions and the following disclaimer in the
michael@18:  * documentation and/or other materials provided with the distribution.
michael@18:  *
michael@18:  *  o Neither the name of Ben Fortuna nor the names of any other contributors
michael@18:  * may be used to endorse or promote products derived from this software
michael@18:  * without specific prior written permission.
michael@18:  *
michael@18:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
michael@18:  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
michael@18:  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
michael@18:  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
michael@18:  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
michael@18:  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
michael@18:  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
michael@18:  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
michael@18:  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
michael@18:  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
michael@18:  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
michael@18:  */
michael@18: package net.fortuna.ical4j.util;
michael@18: 
michael@18: import java.io.InputStream;
michael@18: import java.net.URL;
michael@18: 
michael@18: import android.util.Log;
michael@18: 
michael@18: /**
michael@18:  * @author fortuna
michael@18:  *
michael@18:  */
michael@18: public class ResourceLoader {
michael@18: 
michael@18: 	/**
michael@18: 	 * Load a resource via the thread context classloader. If security permissions don't allow
michael@18: 	 * this fallback to loading via current classloader.
michael@18: 	 * @param name a resource name
michael@18: 	 * @return a {@link URL} or null if resource is not found
michael@18: 	 */
michael@18: 	public static URL getResource(String name) {
michael@18: 		URL resource = null;
michael@18: 		try {
michael@18: 			// Hack to bootstrap a multithreaded class loader context
michael@18: 			if (Thread.currentThread().getContextClassLoader() == null)
michael@18: 				Thread.currentThread().setContextClassLoader(ResourceLoader.class.getClassLoader());
michael@18: 			resource = Thread.currentThread().getContextClassLoader().getResource(name);
michael@18: 
michael@18: 			if (resource == null) // Flawed build path for assets, try again
michael@18: 				resource = Thread.currentThread().getContextClassLoader().getResource("/" + name);
michael@18: 		}
michael@18: 		catch (SecurityException e) {
michael@18: 			Log.i("MSvB-Hack", "Unable to access context classloader, using default. " + e.getMessage());
michael@18: 		}
michael@18: 		catch (Exception e) {
michael@18: 			Log.i("MSvB-Hack", "General context classloader error, using default. " + e.getMessage());
michael@18: 		}
michael@18: 		if (resource == null) {
michael@18: 			resource = ResourceLoader.class.getResource("/" + name);
michael@18: 		}
michael@18: 		return resource;
michael@18: 	}
michael@18: 
michael@18: 	/**
michael@18: 	 * Load a resource via the thread context classloader. If security permissions don't allow
michael@18: 	 * this fallback to loading via current classloader.
michael@18: 	 * @param name a resource name
michael@18: 	 * @return an {@link InputStream} or null if resource is not found
michael@18: 	 */
michael@18: 	public static InputStream getResourceAsStream(String name) {
michael@18: 		InputStream stream = null;
michael@18: 		try {
michael@18: 			// Hack to bootstrap a multithreaded class loader context
michael@18: 			if (Thread.currentThread().getContextClassLoader() == null)
michael@18: 				Thread.currentThread().setContextClassLoader(ResourceLoader.class.getClassLoader());
michael@18: 			stream = Thread.currentThread().getContextClassLoader().getResourceAsStream(name);
michael@18: 			if (stream == null)
michael@18: 				stream = Thread.currentThread().getContextClassLoader().getResourceAsStream("/" + name);
michael@18: 		}
michael@18: 		catch (SecurityException e) {
michael@18: 			Log.i("MSvB-Hack", "Unable to access context classloader, using default. " + e.getMessage());
michael@18: 		}
michael@18: 		catch (Exception e) {
michael@18: 			Log.i("MSvB-Hack", "General context classloader error, using default. " + e.getMessage());
michael@18: 		}
michael@18: 		if (stream == null) {
michael@18: 			stream = ResourceLoader.class.getResourceAsStream("/" + name);
michael@18: 		}
michael@18: 		return stream;
michael@18: 	}
michael@18: }