org.mrgeo.data.vector.VectorRecordReader.java Source code

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Here is the source code for org.mrgeo.data.vector.VectorRecordReader.java

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/*
 * Copyright 2009-2016 DigitalGlobe, Inc.
 *
 * 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 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.mrgeo.data.vector;

import org.apache.hadoop.mapreduce.InputSplit;
import org.apache.hadoop.mapreduce.RecordReader;
import org.apache.hadoop.mapreduce.TaskAttemptContext;
import org.mrgeo.data.DataProviderFactory;
import org.mrgeo.geometry.Geometry;

import java.io.IOException;

public class VectorRecordReader extends RecordReader<FeatureIdWritable, Geometry> {
    private RecordReader<FeatureIdWritable, Geometry> delegate;

    @Override
    public void initialize(InputSplit inputSplit, TaskAttemptContext context)
            throws IOException, InterruptedException {
        if (inputSplit instanceof VectorInputSplit) {
            VectorInputSplit vis = (VectorInputSplit) inputSplit;
            VectorDataProvider dp = DataProviderFactory.getVectorDataProvider(vis.getVectorName(),
                    DataProviderFactory.AccessMode.READ, context.getConfiguration());
            delegate = dp.getRecordReader();
            delegate.initialize(vis.getWrappedInputSplit(), context);
        } else {
            throw new IOException("Input split not a VectorInputSplit");
        }
    }

    @Override
    public boolean nextKeyValue() throws IOException, InterruptedException {
        return delegate.nextKeyValue();
    }

    @Override
    public FeatureIdWritable getCurrentKey() throws IOException, InterruptedException {
        return delegate.getCurrentKey();
    }

    @Override
    public Geometry getCurrentValue() throws IOException, InterruptedException {
        return delegate.getCurrentValue();
    }

    @Override
    public float getProgress() throws IOException, InterruptedException {
        return delegate.getProgress();
    }

    @Override
    public void close() throws IOException {
        delegate.close();
    }
}