/*

  * 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.shiro.io;

 import org.apache.shiro.util.ClassUtils;

 import org.apache.shiro.util.UnknownClassException;

 import java.io.IOException;

 import java.io.InputStream;

 import java.io.ObjectInputStream;

 import java.io.ObjectStreamClass;

 /**

  * Enables correct ClassLoader lookup in various environments (e.g. JEE Servers, etc).

  *

  * @since 1.2

  * @see <a href="https://issues.apache.org/jira/browse/SHIRO-334">SHIRO-334</a>

  */

 public class ClassResolvingObjectInputStream extends ObjectInputStream {

     public ClassResolvingObjectInputStream(InputStream inputStream) throws IOException {

         super(inputStream);

     }

     /**

      * Resolves an {@link ObjectStreamClass} by delegating to Shiro's 

      * {@link ClassUtils#forName(String)} utility method, which is known to work in all ClassLoader environments.

      * 

      * @param osc the ObjectStreamClass to resolve the class name.

      * @return the discovered class

      * @throws IOException never - declaration retained for subclass consistency

      * @throws ClassNotFoundException if the class could not be found in any known ClassLoader

      */

     @Override

     protected Class<?> resolveClass(ObjectStreamClass osc) throws IOException, ClassNotFoundException {

         try {

             return ClassUtils.forName(osc.getName());

         } catch (UnknownClassException e) {

             throw new ClassNotFoundException("Unable to load ObjectStreamClass [" + osc + "]: ", e);

         }

     }

 }