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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 2008-2013 jOpenDocument, by ILM Informatique. All rights reserved.
*
* The contents of this file are subject to the terms of the GNU
* General Public License Version 3 only ("GPL").
* You may not use this file except in compliance with the License.
* You can obtain a copy of the License at http://www.gnu.org/licenses/gpl-3.0.html
* See the License for the specific language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each file.
*
*/
package org.jopendocument.util;
import java.lang.reflect.Method;
public final class CopyUtils {
/**
* Copy the passed object. First tries to clone() it, otherwise tries with a copy constructor.
*
* @param the type of object to be copied.
* @param object the object to be copied, can be null
.
* @return a copy of object
, or null
if object was
* null
.
* @throws IllegalStateException if the object can't be copied.
*/
@SuppressWarnings("unchecked")
public static final E copy(E object) {
if (object == null)
return null;
if (object instanceof Cloneable) {
final Method m;
try {
m = object.getClass().getMethod("clone");
} catch (NoSuchMethodException e) {
throw ExceptionUtils.createExn(IllegalStateException.class, "Cloneable w/o clone()", e);
}
try {
return (E) m.invoke(object);
} catch (Exception e) {
throw ExceptionUtils.createExn(IllegalStateException.class, "clone() failed", e);
}
} else {
try {
return (E) object.getClass().getConstructor(new Class[] { object.getClass() }).newInstance(new Object[] { object });
} catch (Exception e) {
throw ExceptionUtils.createExn(IllegalStateException.class, "Copy constructor failed", e);
}
}
}
}