de.tudarmstadt.ukp.dkpro.core.io.bincas.SerializedCasReader.java Source code

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/*******************************************************************************
 * Copyright 2012
 * Ubiquitous Knowledge Processing (UKP) Lab
 * Technische Universitt Darmstadt
 *
 * 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 de.tudarmstadt.ukp.dkpro.core.io.bincas;

import static org.apache.commons.io.IOUtils.closeQuietly;
import static org.apache.uima.cas.impl.Serialization.deserializeCASComplete;

import java.io.IOException;
import java.io.ObjectInputStream;

import org.apache.uima.cas.CAS;
import org.apache.uima.cas.impl.CASCompleteSerializer;
import org.apache.uima.cas.impl.CASImpl;
import org.apache.uima.collection.CollectionException;

import de.tudarmstadt.ukp.dkpro.core.api.io.ResourceCollectionReaderBase;
import de.tudarmstadt.ukp.dkpro.core.api.resources.CompressionUtils;

public class SerializedCasReader extends ResourceCollectionReaderBase {
    @Override
    public void getNext(CAS aCAS) throws IOException, CollectionException {
        Resource res = nextFile();
        ObjectInputStream is = null;
        try {
            is = new ObjectInputStream(CompressionUtils.getInputStream(res.getLocation(), res.getInputStream()));

            CASCompleteSerializer serializer = (CASCompleteSerializer) is.readObject();
            deserializeCASComplete(serializer, (CASImpl) aCAS);
        } catch (ClassNotFoundException e) {
            throw new IOException(e);
        } finally {
            closeQuietly(is);
        }
    }
}