001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 */ 019package org.apache.shiro.io; 020 021import org.apache.shiro.util.ClassUtils; 022import org.apache.shiro.util.UnknownClassException; 023 024import java.io.IOException; 025import java.io.InputStream; 026import java.io.ObjectInputStream; 027import java.io.ObjectStreamClass; 028 029/** 030 * Enables correct ClassLoader lookup in various environments (e.g. JEE Servers, etc). 031 * 032 * @since 1.2 033 * @see <a href="https://issues.apache.org/jira/browse/SHIRO-334">SHIRO-334</a> 034 */ 035public class ClassResolvingObjectInputStream extends ObjectInputStream { 036 037 public ClassResolvingObjectInputStream(InputStream inputStream) throws IOException { 038 super(inputStream); 039 } 040 041 /** 042 * Resolves an {@link ObjectStreamClass} by delegating to Shiro's 043 * {@link ClassUtils#forName(String)} utility method, which is known to work in all ClassLoader environments. 044 * 045 * @param osc the ObjectStreamClass to resolve the class name. 046 * @return the discovered class 047 * @throws IOException never - declaration retained for subclass consistency 048 * @throws ClassNotFoundException if the class could not be found in any known ClassLoader 049 */ 050 @Override 051 protected Class<?> resolveClass(ObjectStreamClass osc) throws IOException, ClassNotFoundException { 052 try { 053 return ClassUtils.forName(osc.getName()); 054 } catch (UnknownClassException e) { 055 throw new ClassNotFoundException("Unable to load ObjectStreamClass [" + osc + "]: ", e); 056 } 057 } 058}