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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.bookkeeper.stream.protocol;

import java.io.Serializable;
import java.util.Comparator;

/**
 * A range (at a given revision) of a stream.
 */
public class RangeId implements Comparable, Serializable {
    public static final Comparator COMPARATOR = Comparator.naturalOrder();
    private static final long serialVersionUID = 1704491294262309389L;
    private final long streamId;
    private final long rangeId;

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("range(").append(streamId).append(", ").append(rangeId).append(')');
        return sb.toString();
    }

    @Override
    public int compareTo(RangeId other) {
        int result = Long.compare(streamId, other.streamId);
        if (result == 0) {
            result = Long.compare(rangeId, other.rangeId);
        }
        return result;
    }

    private RangeId(final long streamId, final long rangeId) {
        this.streamId = streamId;
        this.rangeId = rangeId;
    }

    public static RangeId of(final long streamId, final long rangeId) {
        return new RangeId(streamId, rangeId);
    }

    public long getStreamId() {
        return this.streamId;
    }

    public long getRangeId() {
        return this.rangeId;
    }

    @Override
    public boolean equals(final Object o) {
        if (o == this) return true;
        if (!(o instanceof RangeId)) return false;
        final RangeId other = (RangeId) o;
        if (!other.canEqual((Object) this)) return false;
        if (this.getStreamId() != other.getStreamId()) return false;
        if (this.getRangeId() != other.getRangeId()) return false;
        return true;
    }

    protected boolean canEqual(final Object other) {
        return other instanceof RangeId;
    }

    @Override
    public int hashCode() {
        final int PRIME = 59;
        int result = 1;
        final long $streamId = this.getStreamId();
        result = result * PRIME + (int) ($streamId >>> 32 ^ $streamId);
        final long $rangeId = this.getRangeId();
        result = result * PRIME + (int) ($rangeId >>> 32 ^ $rangeId);
        return result;
    }
}