| /** |
| * 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.conf.Configured; |
| import org.apache.hadoop.io.erasurecode.ECSchema; |
| |
| /** |
| * A common class of basic facilities to be shared by encoder and decoder |
| * |
| * It implements the {@link ErasureCoder} interface. |
| */ |
| public abstract class AbstractErasureCoder |
| extends Configured implements ErasureCoder { |
| |
| private final int numDataUnits; |
| private final int numParityUnits; |
| |
| public AbstractErasureCoder(int numDataUnits, int numParityUnits) { |
| this.numDataUnits = numDataUnits; |
| this.numParityUnits = numParityUnits; |
| } |
| |
| public AbstractErasureCoder(ECSchema schema) { |
| this(schema.getNumDataUnits(), schema.getNumParityUnits()); |
| } |
| |
| @Override |
| public int getNumDataUnits() { |
| return numDataUnits; |
| } |
| |
| @Override |
| public int getNumParityUnits() { |
| return numParityUnits; |
| } |
| |
| @Override |
| public boolean preferDirectBuffer() { |
| return false; |
| } |
| |
| @Override |
| public void release() { |
| // Nothing to do by default |
| } |
| } |