| /* |
| * Copyright 2009-2010 University of California, Irvine |
| * Licensed 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 from |
| * |
| * 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 edu.uci.ics.hyracks.dataflow.hadoop.util; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.DataInputStream; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import java.io.Serializable; |
| |
| import org.apache.hadoop.io.Writable; |
| import org.apache.hadoop.mapred.InputSplit; |
| import org.apache.hadoop.mapred.JobConf; |
| import org.apache.hadoop.util.ReflectionUtils; |
| |
| public class InputSplitsProxy implements Serializable { |
| private static final long serialVersionUID = 1L; |
| |
| private final Class[] isClasses; |
| private final byte[] bytes; |
| |
| public InputSplitsProxy(JobConf conf, Object[] inputSplits) throws IOException { |
| isClasses = new Class[inputSplits.length]; |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| DataOutputStream dos = new DataOutputStream(baos); |
| if (conf.getUseNewMapper()) { |
| for (int i = 0; i < inputSplits.length; ++i) { |
| isClasses[i] = ((org.apache.hadoop.mapreduce.InputSplit) inputSplits[i]).getClass(); |
| ((Writable) inputSplits[i]).write(dos); |
| } |
| } else { |
| for (int i = 0; i < inputSplits.length; ++i) { |
| isClasses[i] = ((org.apache.hadoop.mapred.InputSplit) inputSplits[i]).getClass(); |
| ((Writable) inputSplits[i]).write(dos); |
| } |
| } |
| dos.close(); |
| bytes = baos.toByteArray(); |
| |
| } |
| |
| public Object[] toInputSplits(JobConf jobConf) throws InstantiationException, IllegalAccessException, IOException { |
| Object[] splits = new Object[isClasses.length]; |
| DataInputStream dis = new DataInputStream(new ByteArrayInputStream(bytes)); |
| for (int i = 0; i < splits.length; ++i) { |
| splits[i] = ReflectionUtils.newInstance(isClasses[i], jobConf); |
| if (jobConf.getUseNewMapper()) { |
| ((Writable) splits[i]).readFields(dis); |
| } else { |
| ((Writable) splits[i]).readFields(dis); |
| } |
| } |
| return splits; |
| } |
| } |