| package org.apache.jcs.yajcache.util; |
| |
| /* |
| * 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. |
| */ |
| |
| import java.io.Serializable; |
| import java.lang.reflect.Array; |
| import org.apache.commons.lang.SerializationUtils; |
| import org.apache.jcs.yajcache.lang.annotation.*; |
| |
| /** |
| * @author Hanson Char |
| */ |
| // @CopyRightApache |
| // http://www.netbeans.org/issues/show_bug.cgi?id=53704 |
| public enum SerializeUtils { |
| inst; |
| /** |
| * Duplicates the given object. |
| * |
| * @return a duplicate of the given Serializable object, |
| * short-cutting the deep clone process if possible. |
| */ |
| public <V extends Serializable> V dup(V obj) { |
| Class k = null; |
| |
| if (obj == null |
| || ClassUtils.inst.isImmutable(k=obj.getClass())) |
| return obj; |
| Class t = k.getComponentType(); |
| |
| if (t != null) { |
| // an array. |
| if (ClassUtils.inst.isImmutable(t)) |
| { |
| // array elements are immutable. |
| // short cut via shallow clone. |
| return this.cloneArray(obj); |
| } |
| } |
| // deep clone. |
| return (V)SerializationUtils.clone(obj); |
| } |
| private @NonNullable <A> A cloneArray(@NonNullable A a) { |
| int len = Array.getLength(a); |
| Object result = Array.newInstance(a.getClass().getComponentType(), len); |
| System.arraycopy(a, 0, result, 0, len); |
| return (A)result; |
| } |
| // public Class<?> getLeaveComponentType(Class<?> k) { |
| // if (k == null) |
| // return k; |
| // if (k.isArray()) { |
| // return this.getLeaveComponentType(k.getComponentType()); |
| // } |
| // return k.getClass(); |
| // } |
| } |