org.pooledtimeseries.seqfile.FullFileRecordReader.java Source code

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Here is the source code for org.pooledtimeseries.seqfile.FullFileRecordReader.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.pooledtimeseries.seqfile;

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.InputSplit;
import org.apache.hadoop.mapreduce.RecordReader;
import org.apache.hadoop.mapreduce.TaskAttemptContext;
import org.apache.hadoop.mapreduce.lib.input.FileSplit;
import org.pooledtimeseries.util.PoTConstants;
import org.pooledtimeseries.util.PoTSerialiser;
import org.pooledtimeseries.util.ReadSeqFileUtil;

public class FullFileRecordReader extends RecordReader<Text, BytesWritable> {
    public static final byte[] VECTOR_SEPERATOR = PoTConstants.VECTOR_SEPERATOR.getBytes();

    private FileSplit fileSplit;
    private Configuration conf;
    private BytesWritable value = new BytesWritable();
    private Text key = new Text();

    private boolean processed = false;

    @Override
    public void initialize(InputSplit split, TaskAttemptContext context) throws IOException, InterruptedException {
        this.fileSplit = (FileSplit) split;
        this.conf = context.getConfiguration();
    }

    @Override
    public boolean nextKeyValue() throws IOException, InterruptedException {
        if (!processed) {

            String files[] = new String[2];
            files[0] = fileSplit.getPath().toString() + ".of.txt";
            files[1] = fileSplit.getPath().toString() + ".hog.txt";

            byte[] listFeatures = PoTSerialiser.getBytes(ReadSeqFileUtil.computeFeatureFromSeries(files));

            value.set(listFeatures, 0, listFeatures.length);
            key.set(fileSplit.getPath().toString());
            processed = true;
            return true;
        }
        return false;
    }

    @Override
    public Text getCurrentKey() throws IOException, InterruptedException {
        return key;
    }

    @Override
    public BytesWritable getCurrentValue() throws IOException, InterruptedException {
        return value;
    }

    @Override
    public float getProgress() throws IOException {
        return processed ? 1.0f : 0.0f;
    }

    @Override
    public void close() throws IOException {
        // do nothing
    }
}