Version.java

/**
 * 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.falcon.designer.storage;

import javax.annotation.Nonnull;

/**
 * Version that represents a specific snapshot of an entity.
 */
public class Version implements Comparable<Version> {

    private final int version;
    private final long timeStamp;

    public Version(int version, long timeStamp) {
        this.version = version;
        this.timeStamp = timeStamp;
    }

    public int getVersion() {
        return version;
    }

    public long getTimeStamp() {
        return timeStamp;
    }

    @Override
    public int compareTo(@Nonnull Version that) {
        return Integer.valueOf(this.version).compareTo(that.version);
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null || getClass() != obj.getClass()) {
            return false;
        }

        Version that = (Version) obj;

        if (this.version != that.version) {
            return false;
        }

        return true;
    }

    @Override
    public int hashCode() {
        return version;
    }
}