com.hazelcast.map.impl.tx.VersionedValue Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2016, Hazelcast, Inc. 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.
*/
package com.hazelcast.map.impl.tx;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.Data;
import com.hazelcast.nio.serialization.DataSerializable;
import java.io.IOException;
/**
* Wrapper for {@link com.hazelcast.nio.serialization.Data} value objects with version information.
*/
public class VersionedValue implements DataSerializable {
long version;
Data value;
public VersionedValue(Data value, long version) {
this.value = value;
this.version = version;
}
public VersionedValue() {
}
@Override
public void writeData(ObjectDataOutput out) throws IOException {
out.writeLong(version);
boolean isNull = value == null;
out.writeBoolean(isNull);
if (!isNull) {
out.writeData(value);
}
}
@Override
public void readData(ObjectDataInput in) throws IOException {
version = in.readLong();
boolean isNull = in.readBoolean();
if (!isNull) {
value = in.readData();
}
}
}