michael@0: /*
michael@0:  * $HeadURL$
michael@0:  * $Revision$
michael@0:  * $Date$
michael@0:  *
michael@0:  * ====================================================================
michael@0:  *
michael@0:  *  Licensed to the Apache Software Foundation (ASF) under one or more
michael@0:  *  contributor license agreements.  See the NOTICE file distributed with
michael@0:  *  this work for additional information regarding copyright ownership.
michael@0:  *  The ASF licenses this file to You under the Apache License, Version 2.0
michael@0:  *  (the "License"); you may not use this file except in compliance with
michael@0:  *  the License.  You may obtain a copy of the License at
michael@0:  *
michael@0:  *      http://www.apache.org/licenses/LICENSE-2.0
michael@0:  *
michael@0:  *  Unless required by applicable law or agreed to in writing, software
michael@0:  *  distributed under the License is distributed on an "AS IS" BASIS,
michael@0:  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
michael@0:  *  See the License for the specific language governing permissions and
michael@0:  *  limitations under the License.
michael@0:  * ====================================================================
michael@0:  *
michael@0:  * This software consists of voluntary contributions made by many
michael@0:  * individuals on behalf of the Apache Software Foundation.  For more
michael@0:  * information on the Apache Software Foundation, please see
michael@0:  * <http://www.apache.org/>.
michael@0:  *
michael@0:  */
michael@0: package ch.boye.httpclientandroidlib.client.utils;
michael@0: 
michael@0: import java.lang.reflect.InvocationTargetException;
michael@0: import java.lang.reflect.Method;
michael@0: 
michael@0: import ch.boye.httpclientandroidlib.annotation.Immutable;
michael@0: 
michael@0: /**
michael@0:  * A collection of utilities to workaround limitations of Java clone framework.
michael@0:  *
michael@0:  * @since 4.0
michael@0:  */
michael@0: @Immutable
michael@0: public class CloneUtils {
michael@0: 
michael@0:     public static Object clone(final Object obj) throws CloneNotSupportedException {
michael@0:         if (obj == null) {
michael@0:             return null;
michael@0:         }
michael@0:         if (obj instanceof Cloneable) {
michael@0:             Class<?> clazz = obj.getClass ();
michael@0:             Method m;
michael@0:             try {
michael@0:                 m = clazz.getMethod("clone", (Class[]) null);
michael@0:             } catch (NoSuchMethodException ex) {
michael@0:                 throw new NoSuchMethodError(ex.getMessage());
michael@0:             }
michael@0:             try {
michael@0:                 return m.invoke(obj, (Object []) null);
michael@0:             } catch (InvocationTargetException ex) {
michael@0:                 Throwable cause = ex.getCause();
michael@0:                 if (cause instanceof CloneNotSupportedException) {
michael@0:                     throw ((CloneNotSupportedException) cause);
michael@0:                 } else {
michael@0:                     throw new Error("Unexpected exception", cause);
michael@0:                 }
michael@0:             } catch (IllegalAccessException ex) {
michael@0:                 throw new IllegalAccessError(ex.getMessage());
michael@0:             }
michael@0:         } else {
michael@0:             throw new CloneNotSupportedException();
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * This class should not be instantiated.
michael@0:      */
michael@0:     private CloneUtils() {
michael@0:     }
michael@0: 
michael@0: }