/*
* Copyright (c) 2013-2017 Cinchapi 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 com.cinchapi.concourse.server.storage;
/**
* A class that can retrieve the version for a record or a key+record.
*
* @author Jeff Nelson
*/
public interface VersionGetter {
/**
* Return the current version of {@code record}.
*
* @param record
* @return the version
*/
public long getVersion(long record);
/**
* Return the current version of {@code key}.
*
* @param key
* @return the version
*/
public long getVersion(String key);
/**
* Return the current version of {@code key} in {@code record}
*
* @param key
* @param record
* @return the version
*/
public long getVersion(String key, long record);
}