/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch 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.elasticsearch.index.engine;

import org.apache.lucene.util.Accountable;
import org.apache.lucene.util.RamUsageEstimator;
import org.elasticsearch.index.translog.Translog;

import java.util.Collection;
import java.util.Collections;

class VersionValue implements Accountable {

    private final long version;
    private final Translog.Location translogLocation;

    public VersionValue(long version, Translog.Location translogLocation) {
        this.version = version;
        this.translogLocation = translogLocation;
    }

    public long time() {
        throw new UnsupportedOperationException();
    }

    public long version() {
        return version;
    }

    public boolean delete() {
        return false;
    }

    public Translog.Location translogLocation() {
        return this.translogLocation;
    }

    @Override
    public long ramBytesUsed() {
        return RamUsageEstimator.NUM_BYTES_OBJECT_HEADER + RamUsageEstimator.NUM_BYTES_LONG + RamUsageEstimator.NUM_BYTES_OBJECT_REF + translogLocation.ramBytesUsed();
    }
    
    @Override
    public Collection<Accountable> getChildResources() {
        return Collections.emptyList();
    }
}