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/*
* ============LICENSE_START=======================================================
* ONAP Policy Engine - Common Modules
* ================================================================================
* Copyright (C) 2018 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.common.utils.io;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
/**
* Utilities for testing serialization and de-serialization of objects.
*/
public class Serializer {
/**
* The constructor.
*/
private Serializer() {
}
/**
* Serializes an object into a byte array.
*
* @param object the object to be serialized
* @return the byte array containing the serialized object
* @throws IOException if an error occurs
*/
public static <T> byte[] serialize(T object) throws IOException {
try (ByteArrayOutputStream out = new ByteArrayOutputStream()) {
try (ObjectOutputStream oos = new ObjectOutputStream(out)) {
oos.writeObject(object);
}
return out.toByteArray();
}
}
/**
* De-serializes an object from a byte array.
*
* @param clazz class of object that is expected to be de-serialized
* @param data the byte array containing the serialized object
* @return the object that was de-serialized from the byte array
* @throws IOException if an error occurs
*/
public static <T> T deserialize(Class<T> clazz, byte[] data) throws IOException {
try (ByteArrayInputStream in = new ByteArrayInputStream(data);
ObjectInputStream ois = new ObjectInputStream(in)) {
return clazz.cast(ois.readObject());
} catch (ClassNotFoundException e) {
throw new IOException(e);
}
}
/**
* Runs an object through a complete round trip, serializing and then de-serializing
* it.
*
* @param object object to be serialized
* @return the object that was de-serialized
* @throws IOException if an error occurs
*/
@SuppressWarnings("unchecked")
public static <T> T roundTrip(T object) throws IOException {
return (T) deserialize(object.getClass(), serialize(object));
}
}
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