Package org.apache.ctakes.constituency.parser.ae

Source Code of org.apache.ctakes.constituency.parser.ae.ConstituencyParser

/**
* 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 org.apache.ctakes.constituency.parser.ae;

import java.io.FileNotFoundException;

import org.apache.ctakes.constituency.parser.MaxentParserWrapper;
import org.apache.ctakes.constituency.parser.ParserWrapper;
import org.apache.ctakes.core.resource.FileLocator;
import org.apache.log4j.Logger;
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.uimafit.component.JCasAnnotator_ImplBase;
import org.uimafit.descriptor.ConfigurationParameter;


public class ConstituencyParser extends JCasAnnotator_ImplBase {
  public static final String PARAM_MODEL_FILENAME = "MODEL_FILENAME";
  public static final String PARAM_USE_POS = "USE_POS";
 
  @ConfigurationParameter(
      name = PARAM_MODEL_FILENAME,
      description = "File containing the opennlp-trained parser model",
      mandatory = false,
      defaultValue = "org/apache/ctakes/constituency/parser/models/sharpacq-3.1.bin"
  ) private String modelFilename;
 
  @ConfigurationParameter(
      name = PARAM_USE_POS,
      description = "Whether to use the POS tags generated by cTAKES pos tagger or generate our own",
      mandatory = false,
      defaultValue = "false"
  ) private boolean usePos;
 
  private ParserWrapper parser = null;
  private Logger logger = Logger.getLogger(this.getClass());

  @Override
  public void initialize(UimaContext aContext)
      throws ResourceInitializationException {
    super.initialize(aContext);
    try {
      logger.info("Initializing parser...");   
      parser = new MaxentParserWrapper(FileLocator.locateFile(modelFilename).getAbsolutePath(), usePos);
    } catch (FileNotFoundException e) {
      e.printStackTrace();
      logger.error("Error reading parser model file/directory: " + e.getMessage());
      throw new ResourceInitializationException(e);
    }
  }


  @Override
  public void process(JCas jcas) throws AnalysisEngineProcessException {
    parser.createAnnotations(jcas);
  }
}
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