001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.wicket.core.util.objects.checker; 018 019import java.io.NotSerializableException; 020import java.io.Serializable; 021import java.lang.reflect.Proxy; 022 023/** 024 * An implementation of IObjectChecker that checks whether the object 025 * implements {@link java.io.Serializable} interface 026 * 027 * <p> 028 * Note: There is a system property <em>-Dsun.io.serialization.extendedDebugInfo=true</em> that could give 029 * even more debug information. 030 * </p> 031 */ 032public class ObjectSerializationChecker extends AbstractObjectChecker 033{ 034 /** Exception that should be set as the cause when throwing a new exception. */ 035 private final NotSerializableException cause; 036 037 /** 038 * A constructor to use when the checker is used before a previous attempt to 039 * serialize the object. 040 */ 041 public ObjectSerializationChecker() 042 { 043 this(null); 044 } 045 046 /** 047 * A constructor to use when there was a previous attempt to serialize the 048 * object and it failed with the {@code cause}. 049 * 050 * @param cause 051 * the cause of the serialization failure in a previous attempt. 052 */ 053 public ObjectSerializationChecker(NotSerializableException cause) 054 { 055 this.cause = cause; 056 } 057 058 /** 059 * Makes the check for all objects. Exclusions by type is not supported. 060 * @param object 061 * the object to check 062 * @return the {@link org.apache.wicket.core.util.objects.checker.IObjectChecker.Result#SUCCESS} if the object can be serialized. 063 */ 064 @Override 065 public Result check(Object object) 066 { 067 Result result = Result.SUCCESS; 068 if (!(object instanceof Serializable) && (!Proxy.isProxyClass(object.getClass()))) 069 { 070 result = new Result(Result.Status.FAILURE, "The object type is not Serializable!", cause); 071 } 072 073 return result; 074 } 075}