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feilong is a suite of core and expanded libraries that include utility classes, http, excel,cvs, io classes, and much much more.

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/*
 * Copyright (C) 2009, 2010, 2011 XStream Committers.
 * All rights reserved.
 *
 * The software in this package is published under the terms of the BSD
 * style license a copy of which has been included with this distribution in
 * the LICENSE.txt file.
 *
 * Created on 29. August 2009 by Joerg Schaible
 */
package com.feilong.lib.xstream.core.util;

import java.lang.reflect.Array;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import com.feilong.lib.xstream.converters.reflection.ObjectAccessException;

/**
 * Utility functions for {@link Cloneable} objects.
 * 
 * @author Jörg Schaible
 * @since 1.4
 */
public class Cloneables{

    public static Object clone(Object o){
        if (o instanceof Cloneable){
            if (o.getClass().isArray()){
                final Class componentType = o.getClass().getComponentType();
                if (!componentType.isPrimitive()){
                    return ((Object[]) o).clone();
                }else{
                    int length = Array.getLength(o);
                    final Object clone = Array.newInstance(componentType, length);
                    while (length-- > 0){
                        Array.set(clone, length, Array.get(o, length));
                    }

                    return clone;
                }
            }else{
                try{
                    Method clone = o.getClass().getMethod("clone", (Class[]) null);
                    return clone.invoke(o, (Object[]) null);
                }catch (NoSuchMethodException e){
                    throw new ObjectAccessException("Cloneable type has no clone method", e);
                }catch (IllegalAccessException e){
                    throw new ObjectAccessException("Cannot clone Cloneable type", e);
                }catch (InvocationTargetException e){
                    throw new ObjectAccessException("Exception cloning Cloneable type", e.getCause());
                }
            }
        }
        return null;
    }

    public static Object cloneIfPossible(Object o){
        Object clone = clone(o);
        return clone == null ? o : clone;
    }
}