/*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you 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.apache.myfaces.resource;

 import java.io.InputStream;

 import java.net.URL;

 import org.apache.myfaces.shared.resource.ContractResourceLoader;

 import org.apache.myfaces.shared.resource.ResourceMeta;

 import org.apache.myfaces.shared.resource.ResourceMetaImpl;

 import org.apache.myfaces.shared.util.ClassUtils;

 /**

  *

  * @author Leonardo Uribe

  */

 public class ClassLoaderContractResourceLoader extends ContractResourceLoader

 {

     public ClassLoaderContractResourceLoader(String prefix)

     {

         super(prefix);

     }

     @Override

     public String getLibraryVersion(String path, String contractName)

     {

         return null;

     }

     @Override

     public InputStream getResourceInputStream(ResourceMeta resourceMeta)

     {

         InputStream is = null;

         if (getPrefix() != null && !"".equals(getPrefix()))

         {

             String name = getPrefix() + '/' + resourceMeta.getContractName() 

                 + '/' + resourceMeta.getResourceIdentifier();

             is = getClassLoader().getResourceAsStream(name);

             if (is == null)

             {

                 is = this.getClass().getClassLoader().getResourceAsStream(name);

             }

             return is;

         }

         else

         {

             String name = resourceMeta.getContractName() 

                 + '/' + resourceMeta.getResourceIdentifier();

             is = getClassLoader().getResourceAsStream(name);

             if (is == null)

             {

                 is = this.getClass().getClassLoader().getResourceAsStream(name);

             }

             return is;

         }

     }

     @Override

     public URL getResourceURL(ResourceMeta resourceMeta)

     {

         URL url = null;

         if (getPrefix() != null && !"".equals(getPrefix()))

         {

             String name = getPrefix() + '/' + resourceMeta.getContractName() + 

                 '/' + resourceMeta.getResourceIdentifier();

             url = getClassLoader().getResource(name);

             if (url == null)

             {

                 url = this.getClass().getClassLoader().getResource(name);

             }

             return url;

         }

         else

         {

             String name = resourceMeta.getContractName() + '/' + resourceMeta.getResourceIdentifier();

             url = getClassLoader().getResource(name);

             if (url == null)

             {

                 url = this.getClass().getClassLoader().getResource(name);

             }

             return url;

         }

     }

     @Override

     public String getResourceVersion(String path, String contractName)

     {

         return null;

     }

     @Override

     public ResourceMeta createResourceMeta(String prefix, String libraryName, String libraryVersion,

                                            String resourceName, String resourceVersion, 

                                            String contractName)

     {

         return new ResourceMetaImpl(prefix, libraryName, libraryVersion, resourceName, 

             resourceVersion, contractName);

     }

     /**

      * Returns the ClassLoader to use when looking up resources under the top level package. By default, this is the

      * context class loader.

      * 

      * @return the ClassLoader used to lookup resources

      */

     protected ClassLoader getClassLoader()

     {

         return ClassUtils.getContextClassLoader();

     }

     @Override

     public boolean libraryExists(String libraryName, String contractName)

     {

         if (getPrefix() != null && !"".equals(getPrefix()))

         {

             String name = getPrefix() + '/' + 

                 contractName + '/' + libraryName;

             URL url = getClassLoader().getResource(name);

             if (url == null)

             {

                 url = this.getClass().getClassLoader().getResource(name);

             }

             if (url != null)

             {

                 return true;

             }

         }

         else

         {

             String name = contractName + '/' + libraryName;

             URL url = getClassLoader().getResource(name);

             if (url == null)

             {

                 url = this.getClass().getClassLoader().getResource(name);

             }

             if (url != null)

             {

                 return true;

             }

         }

         return false;

     }

 }