/*

  * 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.shared.resource;

 /**

  * ResourceLoaders that are able to handle contract aware resources

  * must extends from this class.

  */

 public abstract class ContractResourceLoader extends ResourceLoader

 {

     public static final String VERSION_INVALID = "INVALID";

     public ContractResourceLoader(String prefix)

     {

         super(prefix);

     }

     public String getResourceVersion(String path)

     {

         return null;

     }

     public String getLibraryVersion(String path)

     {

         return null;

     }

     public abstract String getResourceVersion(String path, String contractName);

     /**

      * Return the max available version found (if exists) or

      * return null if no version available. 

      */

     public abstract String getLibraryVersion(String path, String contractName);

     public ResourceMeta createResourceMeta(String prefix, String libraryName, 

             String libraryVersion, String resourceName, String resourceVersion)

     {

         return null;

     }

     public abstract ResourceMeta createResourceMeta(String prefix, String libraryName, 

             String libraryVersion, String resourceName, String resourceVersion, String contractName);

     public boolean libraryExists(String libraryName)

     {

         return false;

     }

     public abstract boolean libraryExists(String libraryName, String contractName);

 }