io.cdap.wrangler.utils.ObjectSerDe Maven / Gradle / Ivy
/*
* Copyright © 2017-2019 Cask Data, Inc.
*
* 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 io.cdap.wrangler.utils;
import io.cdap.wrangler.api.annotations.PublicEvolving;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectInputStream;
import java.io.ObjectOutput;
import java.io.ObjectOutputStream;
/**
* This class allows one to serialize the object of T into bytes.
*
* @param type of object to serialize
*/
@PublicEvolving
public final class ObjectSerDe {
/**
* Converts an object of type T into bytes.
*
* @param object to be serialized into bytes.
* @return byte array of serialized object.
*/
public byte[] toByteArray(T object) throws IOException {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
ObjectOutput out = null;
try {
out = new ObjectOutputStream(bos);
out.writeObject(object);
out.flush();
return bos.toByteArray();
} finally {
try {
bos.close();
} catch (IOException ex) {
// ignore close exception
}
}
}
/**
* Converts a serialized object byte array back into object.
*
* @param bytes to be converted to object of type T.
* @return an instance of object deserialized from the byte array.
* @see ObjectSerDe#toByteArray(Object)
*/
public T toObject(byte[] bytes) throws IOException, ClassNotFoundException {
ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
ObjectInput in = null;
try {
in = new ObjectInputStream(bis);
T object = (T) in.readObject();
return object;
} finally {
try {
if (in != null) {
in.close();
}
} catch (IOException ex) {
// ignore close exception
}
}
}
}