de.tudarmstadt.ukp.csniper.ml.TKSVMlightModelWriter.java Source code

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/*******************************************************************************
 * Copyright 2013
 * 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.csniper.ml;

import java.io.File;

import org.apache.commons.lang.StringUtils;
import org.apache.uima.UimaContext;
import org.apache.uima.analysis_engine.AnalysisEngineProcessException;
import org.apache.uima.jcas.JCas;
import org.apache.uima.resource.ResourceInitializationException;
import org.cleartk.classifier.CleartkAnnotator;
import org.cleartk.classifier.CleartkProcessingException;
import org.cleartk.classifier.Feature;
import org.cleartk.classifier.Instance;
import org.cleartk.classifier.jar.Train;
import org.apache.uima.fit.util.JCasUtil;

import de.tudarmstadt.ukp.dkpro.core.api.metadata.type.DocumentMetaData;
import de.tudarmstadt.ukp.dkpro.core.api.syntax.type.PennTree;

public class TKSVMlightModelWriter extends CleartkAnnotator<Boolean> {
    //   public static final String PARAM_OUTPUT_DIRECTORY = "outputDirectory";
    //   @ConfigurationParameter(name = PARAM_OUTPUT_DIRECTORY, mandatory = true)
    public File outputDirectory;

    @Override
    public void initialize(UimaContext aContext) throws ResourceInitializationException {
        super.initialize(aContext);
        outputDirectory = new File((String) aContext
                .getConfigParameterValue("org.cleartk.classifier.jar.DirectoryDataWriterFactory.outputDirectory"));
    }

    @Override
    public void process(JCas aJCas) throws AnalysisEngineProcessException {
        // create a new instance for each PennTree
        for (PennTree t : JCasUtil.select(aJCas, PennTree.class)) {
            Instance<Boolean> instance = new Instance<Boolean>();
            instance.add(new Feature("TK_tree", StringUtils.normalizeSpace(t.getPennTree())));
            instance.setOutcome(parseBool(DocumentMetaData.get(aJCas).getDocumentTitle()));
            train(instance);
        }
    }

    @Override
    public void collectionProcessComplete() throws AnalysisEngineProcessException {
        super.collectionProcessComplete();
        // build the model
        try {
            Train.main(outputDirectory.getPath(), "-t", "5", "-c", "1.0", "-C", "+");
        } catch (Exception e) {
            throw new AnalysisEngineProcessException(e);
        }
    }

    private void train(Instance<Boolean> instance) throws CleartkProcessingException {
        dataWriter.write(instance);
    }

    private Boolean parseBool(String aResult) {
        return aResult.equalsIgnoreCase("correct");
    }
}