/**
* 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.hcatalog.data.transfer;
import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.ArrayList;
import java.util.List;
import org.apache.hadoop.conf.Configurable;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.mapreduce.InputSplit;
import org.apache.hcatalog.mapreduce.HCatSplit;
/** This class will contain information of different {@link InputSplit} obtained at master node
* and configuration. This class implements {@link Externalizable} so it can be serialized using
* standard java mechanisms.
*/
public class ReaderContext implements Externalizable, Configurable {
private static final long serialVersionUID = -2656468331739574367L;
private List<InputSplit> splits;
private Configuration conf;
public ReaderContext() {
this.splits = new ArrayList<InputSplit>();
this.conf = new Configuration();
}
public void setInputSplits(final List<InputSplit> splits) {
this.splits = splits;
}
public List<InputSplit> getSplits() {
return splits;
}
@Override
public Configuration getConf() {
return conf;
}
@Override
public void setConf(final Configuration config) {
conf = config;
}
@Override
public void writeExternal(ObjectOutput out) throws IOException {
conf.write(out);
out.writeInt(splits.size());
for (InputSplit split : splits) {
((HCatSplit)split).write(out);
}
}
@Override
public void readExternal(ObjectInput in) throws IOException,
ClassNotFoundException {
conf.readFields(in);
int numOfSplits = in.readInt();
for (int i=0 ; i < numOfSplits; i++) {
HCatSplit split = new HCatSplit();
split.readFields(in);
splits.add(split);
}
}
}