/**
* 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.io.erasurecode.coder;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.io.erasurecode.ECBlock;
import org.apache.hadoop.io.erasurecode.ECChunk;
import org.apache.hadoop.io.erasurecode.rawcoder.RawErasureDecoder;
/**
* Erasure decoding step, a wrapper of all the necessary information to perform
* a decoding step involved in the whole process of decoding a block group.
*/
@InterfaceAudience.Private
public class ErasureDecodingStep extends AbstractErasureCodingStep {
private int[] erasedIndexes;
private RawErasureDecoder rawDecoder;
/**
* The constructor with all the necessary info.
* @param inputBlocks
* @param erasedIndexes the indexes of erased blocks in inputBlocks array
* @param outputBlocks
* @param rawDecoder
*/
public ErasureDecodingStep(ECBlock[] inputBlocks, int[] erasedIndexes,
ECBlock[] outputBlocks,
RawErasureDecoder rawDecoder) {
super(inputBlocks, outputBlocks);
this.erasedIndexes = erasedIndexes;
this.rawDecoder = rawDecoder;
}
@Override
public void performCoding(ECChunk[] inputChunks, ECChunk[] outputChunks) {
rawDecoder.decode(inputChunks, erasedIndexes, outputChunks);
}
}