io.fabric8.maven.docker.util.DeepCopy Maven / Gradle / Ivy
package io.fabric8.maven.docker.util;
/*
*
* Copyright 2016 Roland Huss
*
* 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.
*/
import java.io.*;
public class DeepCopy {
/**
* Returns a copy of the object, or null if the object cannot
* be serialized.
*/
public static T copy(T orig) {
if (orig == null) {
return null;
}
try {
// Write the object out to a byte array
ByteArrayOutputStream fbos = new ByteArrayOutputStream();
try (ObjectOutputStream out = new ObjectOutputStream(fbos)) {
out.writeObject(orig);
out.flush();
}
// Retrieve an input stream from the byte array and read
// a copy of the object back in.
try (ByteArrayInputStream fbis = new ByteArrayInputStream(fbos.toByteArray());
ObjectInputStream in = new ObjectInputStream(fbis)) {
return (T) in.readObject();
}
} catch (IOException | ClassNotFoundException e) {
throw new IllegalStateException("Cannot copy " + orig, e);
}
};
}