/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.provisionr.api;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import static org.fest.assertions.api.Assertions.assertThat;
/**
* @see <a href="http://stackoverflow.com/questions/3840356" />
*/
public class AssertSerializable {
public static <T extends Serializable> void assertSerializable(T instance, Class<T> klass) {
try {
assertThat(unpickle(pickle(instance), klass)).isEqualTo(instance);
} catch (Exception e) {
throw new AssertionError(e);
}
}
private static <T extends Serializable> byte[] pickle(T instance) throws IOException {
ByteArrayOutputStream backingStream = new ByteArrayOutputStream();
ObjectOutputStream out = new ObjectOutputStream(backingStream);
out.writeObject(instance);
out.close();
return backingStream.toByteArray();
}
private static <T extends Serializable> T unpickle(byte[] bytes, Class<T> klass) throws IOException, ClassNotFoundException {
ByteArrayInputStream backingStream = new ByteArrayInputStream(bytes);
ObjectInputStream in = new ObjectInputStream(backingStream);
Object o = in.readObject();
return klass.cast(o);
}
}