/**

  * Copyright 2005-2013 Dozer Project

  *

  * 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.dozer.util;

 import org.apache.commons.lang3.StringUtils;

 import java.net.MalformedURLException;

 import java.net.URL;

 /**

  * Internal class that loads resources from the classpath. Also supports loading

  * resources outside of the classpath if it is prepended with "file:". Only

  * intended for internal use.

  * 

  * 

  * @author tierney.matt

  * @author garsombke.franz

  */

 public class ResourceLoader {

   private final ClassLoader classLoader;

   public ResourceLoader(ClassLoader classLoader) {

     this.classLoader = classLoader;

   }

   public URL getResource(String resource) {

     resource = resource.trim();

     URL result = Thread.currentThread().getContextClassLoader().getResource(resource);

     // Could not find resource. Try with the classloader that loaded this class.

     if (result == null) {

       ClassLoader classLoader = ResourceLoader.class.getClassLoader();

       if (classLoader != null) {

         result = classLoader.getResource(resource);

       }

     }

     // Last ditch attempt searching classpath

     if (result == null) {

       result = ClassLoader.getSystemResource(resource);

     }

     // one more time

     if (result == null && StringUtils.contains(resource, ":")) {

       try {

         result = new URL(resource);

       } catch (MalformedURLException e) {

         MappingUtils.throwMappingException(e);

       }

     }

     return result;

   }

 }