net.jarcec.sqoop.data.gen.mr.GeneratorRecordReader.java Source code

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Here is the source code for net.jarcec.sqoop.data.gen.mr.GeneratorRecordReader.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 net.jarcec.sqoop.data.gen.mr;

import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.mapreduce.InputSplit;
import org.apache.hadoop.mapreduce.RecordReader;
import org.apache.hadoop.mapreduce.TaskAttemptContext;

import java.io.IOException;

/**
 * Record reader for generator input format.
 */
public class GeneratorRecordReader extends RecordReader {

    GeneratorSplit split;
    boolean read;

    @Override
    public void initialize(InputSplit inputSplit, TaskAttemptContext taskAttemptContext)
            throws IOException, InterruptedException {
        split = (GeneratorSplit) inputSplit;
        read = false;
    }

    @Override
    public boolean nextKeyValue() throws IOException, InterruptedException {
        if (read) {
            return false;
        }

        read = true;
        return true;
    }

    @Override
    public Object getCurrentKey() throws IOException, InterruptedException {
        return new LongWritable(split.from);
    }

    @Override
    public Object getCurrentValue() throws IOException, InterruptedException {
        return new LongWritable(split.to);
    }

    @Override
    public float getProgress() throws IOException, InterruptedException {
        if (read) {
            return 1F;
        } else {
            return 0F;
        }
    }

    @Override
    public void close() throws IOException {
    }
}