storage/src/main/java/org/apache/kafka/storage/internals/log/OffsetPosition.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.kafka.storage.internals.log;

/**
 * The mapping between a logical log offset and the physical position
 * in some log file of the beginning of the message set entry with the
 * given offset.
 */
public final class OffsetPosition implements IndexEntry {
    public final long offset;
    public final int position;

    public OffsetPosition(long offset, int position) {
        this.offset = offset;
        this.position = position;
    }

    @Override
    public long indexKey() {
        return offset;
    }

    @Override
    public long indexValue() {
        return position;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o)
            return true;
        if (o == null || getClass() != o.getClass())
            return false;

        OffsetPosition that = (OffsetPosition) o;

        return offset == that.offset
            && position == that.position;
    }

    @Override
    public int hashCode() {
        int result = Long.hashCode(offset);
        result = 31 * result + position;
        return result;
    }

    @Override
    public String toString() {
        return "OffsetPosition(" +
            "offset=" + offset +
            ", position=" + position +
            ')';
    }
}