org.omnifaces.util.copier.CloneCopier Maven / Gradle / Ivy
/*
* Copyright 2014 OmniFaces.
*
* Licensed 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.
*/
package org.omnifaces.util.copier;
import static java.lang.String.format;
import java.lang.reflect.Method;
/**
* Copier that copies an object using the {@link Cloneable} facility.
*
* @since 2.0
* @author Arjan Tijms
*
*/
public class CloneCopier implements Copier {
private static final String ERROR_CANT_CLONE =
"Can not clone object of type %s since it doesn't implement Cloneable";
@Override
public Object copy(Object object) {
if (!(object instanceof Cloneable)) {
throw new IllegalStateException(format(ERROR_CANT_CLONE, object.getClass()));
}
try {
Method cloneMethod = getMethod(object, "clone");
if (!cloneMethod.isAccessible()) {
cloneMethod.setAccessible(true);
}
return cloneMethod.invoke(object);
} catch (Exception e) {
throw new IllegalStateException(e);
}
}
private Method getMethod(Object object, String name) {
for (Class c = object.getClass(); c != null; c = c.getSuperclass()) {
for (Method method : c.getDeclaredMethods()) {
if (method.getName().equals(name)) {
return method;
}
}
}
return null;
}
}