eu.larkc.iris.storage.rdf.RdfInputFormat.java Source code

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Here is the source code for eu.larkc.iris.storage.rdf.RdfInputFormat.java

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/*
 * Copyright 2010 Softgress - http://www.softgress.com/
 * 
 * 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 eu.larkc.iris.storage.rdf;

import java.io.IOException;

import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.mapred.InputSplit;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.RecordReader;
import org.apache.hadoop.mapred.Reporter;
import org.ontoware.rdf2go.model.ModelSet;

import eu.larkc.iris.storage.AtomRecord;
import eu.larkc.iris.storage.FactsConfigurationFactory;
import eu.larkc.iris.storage.FactsInputFormat;
import eu.larkc.iris.storage.FactsInputSplit;

public class RdfInputFormat<T extends AtomRecord> extends FactsInputFormat<T> {

    @Override
    public long getTotalSize(JobConf jobConf) {
        RdfFactsConfiguration rdfFactsConfiguration = (RdfFactsConfiguration) FactsConfigurationFactory
                .getFactsConfiguration(jobConf);

        ModelSet modelSet = rdfFactsConfiguration.getModelSet(true);
        if (!modelSet.isOpen()) {
            modelSet.open();
        }

        long totalSize = modelSet.size();

        if (modelSet.isOpen()) {
            modelSet.close();
        }

        return totalSize;
    }

    @SuppressWarnings({ "rawtypes", "unchecked" })
    @Override
    public RecordReader<LongWritable, T> getRecordReader(InputSplit split, JobConf job, Reporter reporter)
            throws IOException {
        Class inputClass = job.getClass(RdfFactsConfiguration.INPUT_CLASS_PROPERTY,
                FactsInputFormat.NullAtomWritable.class);
        return new RdfFactsRecordReader((FactsInputSplit) split, inputClass, job);
    }

}