/*
 * 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.mledger.offload.jcloud.impl;

import java.util.Objects;
import org.apache.bookkeeper.mledger.offload.jcloud.OffloadIndexEntry;

/**
 * The Index Entry in OffloadIndexBlock.
 */
public class OffloadIndexEntryImpl implements OffloadIndexEntry {
    public static OffloadIndexEntryImpl of(long entryId, int partId, long offset, long blockHeaderSize) {
        return new OffloadIndexEntryImpl(entryId, partId, offset, blockHeaderSize);
    }

    private final long entryId;
    private final int partId;
    private final long offset;
    private final long blockHeaderSize;

    @Override
    public long getEntryId() {
        return entryId;
    }

    @Override
    public int getPartId() {
        return partId;
    }

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

    @Override
    public long getDataOffset() {
        return offset + blockHeaderSize;
    }

    private OffloadIndexEntryImpl(long entryId, int partId, long offset, long blockHeaderSize) {
        this.entryId = entryId;
        this.partId = partId;
        this.offset = offset;
        this.blockHeaderSize = blockHeaderSize;
    }

    @Override
    public String toString() {
        return String.format("[eid:%d, part:%d, offset:%d, doffset:%d]",
                entryId, partId, offset, getDataOffset());
    }

    @Override
    public boolean equals(Object o) {
        if (!(o instanceof OffloadIndexEntryImpl that)) {
            return false;
        }
        return entryId == that.entryId && partId == that.partId && offset == that.offset
                && blockHeaderSize == that.blockHeaderSize;
    }

    @Override
    public int hashCode() {
        return Objects.hash(entryId, partId, offset, blockHeaderSize);
    }
}

