org.apache.hadoop.hdfs.protocol.ExtendedBlock.java Source code

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Here is the source code for org.apache.hadoop.hdfs.protocol.ExtendedBlock.java

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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.hadoop.hdfs.protocol;

import org.apache.commons.lang3.builder.HashCodeBuilder;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;

/**
 * Identifies a Block uniquely across the block pools
 */
@InterfaceAudience.Private
@InterfaceStability.Evolving
public class ExtendedBlock {
    private String poolId;
    private Block block;

    public ExtendedBlock() {
        this(null, 0, 0, 0);
    }

    public ExtendedBlock(final ExtendedBlock b) {
        this(b.poolId, new Block(b.block));
    }

    public ExtendedBlock(final String poolId, final long blockId) {
        this(poolId, blockId, 0, 0);
    }

    public ExtendedBlock(String poolId, Block b) {
        this.poolId = poolId != null ? poolId.intern() : null;
        this.block = b;
    }

    public ExtendedBlock(final String poolId, final long blkid, final long len, final long genstamp) {
        this.poolId = poolId != null ? poolId.intern() : null;
        block = new Block(blkid, len, genstamp);
    }

    public String getBlockPoolId() {
        return poolId;
    }

    /** Returns the block file name for the block */
    public String getBlockName() {
        return block.getBlockName();
    }

    public long getNumBytes() {
        return block.getNumBytes();
    }

    public long getBlockId() {
        return block.getBlockId();
    }

    public long getGenerationStamp() {
        return block.getGenerationStamp();
    }

    public void setBlockId(final long bid) {
        block.setBlockId(bid);
    }

    public void setGenerationStamp(final long genStamp) {
        block.setGenerationStamp(genStamp);
    }

    public void setNumBytes(final long len) {
        block.setNumBytes(len);
    }

    public void set(String poolId, Block blk) {
        this.poolId = poolId != null ? poolId.intern() : null;
        this.block = blk;
    }

    public static Block getLocalBlock(final ExtendedBlock b) {
        return b == null ? null : b.getLocalBlock();
    }

    public Block getLocalBlock() {
        return block;
    }

    @Override // Object
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (!(o instanceof ExtendedBlock)) {
            return false;
        }
        ExtendedBlock b = (ExtendedBlock) o;
        return b.block.equals(block) && (b.poolId != null ? b.poolId.equals(poolId) : poolId == null);
    }

    @Override // Object
    public int hashCode() {
        return new HashCodeBuilder(31, 17).append(poolId).append(block).toHashCode();
    }

    @Override // Object
    public String toString() {
        return poolId + ":" + block;
    }
}