/*
 * 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.beam.sdk.io.hbase;

import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos;

/**
 * This is just a wrapper class to serialize HBase {@link Scan} using Protobuf.
 */
class SerializableScan implements Serializable {
    private transient Scan scan;

    public SerializableScan() {
    }

    public SerializableScan(Scan scan) {
        if (scan == null) {
            throw new NullPointerException("Scan must not be null.");
        }
        this.scan = scan;
    }

    private void writeObject(ObjectOutputStream out) throws IOException {
        ProtobufUtil.toScan(scan).writeDelimitedTo(out);
    }

    private void readObject(ObjectInputStream in) throws IOException {
        scan = ProtobufUtil.toScan(ClientProtos.Scan.parseDelimitedFrom(in));
    }

    public Scan get() {
        return scan;
    }
}