openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/meta/strats/NanoPrecisionTimestampVersionStrategy.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.openjpa.jdbc.meta.strats;

import org.apache.openjpa.lib.util.TimestampHelper;

/**
 * Uses a timestamp for optimistic versioning with nanosecond
 * precision.
 *
 * @author Albert Lee
 */
public class NanoPrecisionTimestampVersionStrategy
    extends TimestampVersionStrategy {

    public static final String ALIAS = "nano-timestamp";

    public String getAlias() {
        return ALIAS;
    }

    protected Object nextVersion(Object version) {
        return TimestampHelper.getNanoPrecisionTimestamp();
    }
}