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/*
 * 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.jackrabbit.oak.segment.file;

import java.util.Comparator;

/**
 * A file entry location in a tar file. This is used for the index with a tar
 * file.
 */
class TarEntry {

    /** Size in bytes a tar entry takes up in the tar file */
    static final int SIZE = 28;

    static final Comparator OFFSET_ORDER = new Comparator() {
        @Override
        public int compare(TarEntry a, TarEntry b) {
            if (a.offset > b.offset) {
                return 1;
            } else if (a.offset < b.offset) {
                return -1;
            } else {
                return 0;
            }
        }
    };

    static final Comparator IDENTIFIER_ORDER = new Comparator() {
        @Override
        public int compare(TarEntry a, TarEntry b) {
            if (a.msb > b.msb) {
                return 1;
            } else if (a.msb < b.msb) {
                return -1;
            } else if (a.lsb > b.lsb) {
                return 1;
            } else if (a.lsb < b.lsb) {
                return -1;
            } else {
                return 0;
            }
        }
    };

    private final long msb;

    private final long lsb;

    private final int offset;

    private final int size;

    private final int generation;

    TarEntry(long msb, long lsb, int offset, int size, int generation) {
        this.msb = msb;
        this.lsb = lsb;
        this.offset = offset;
        this.size = size;
        this.generation = generation;
    }

    long msb() {
        return msb;
    }

    long lsb() {
        return lsb;
    }

    int offset() {
        return offset;
    }

    int size() {
        return size;
    }

    int generation() {
        return generation;
    }

}