AnnaLemmatizer.java

/**
 * 
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.
 * 
 * @author Wei Zhang,  Language Technology Institute, School of Computer Science, Carnegie-Mellon University.
 * email: wei.zhang@cs.cmu.edu
 * 
 */
package edu.cmu.geolocator.nlp.lemma;

import is2.data.SentenceData09;
import is2.lemmatizer.Lemmatizer;
import is2.tools.Tool;

import java.util.ArrayList;
import java.util.List;

import edu.cmu.geolocator.model.Sentence;
import edu.cmu.geolocator.nlp.tokenizer.EuroLangTwokenizer;

/**
 * The tokenizer from Mate-tools, an online google project The taggers are trained on CONLL-09
 * dataset.
 * 
 * @author indri
 * 
 */
public class AnnaLemmatizer implements edu.cmu.geolocator.nlp.Lemmatizer {

  Tool lemmatizer;

  SentenceData09 i;

  public AnnaLemmatizer(String f) {
    System.err.println("Loading: " + f);
    lemmatizer = new Lemmatizer(f);
    i = new SentenceData09();
  }

  List<String> text, tokens;

  public Sentence lemmatize(Sentence sent) {
    text = new ArrayList<String>(sent.tokenLength());
    tokens = lemmatize(text);
    for (int i = 0; i < sent.tokenLength(); i++) {
      tokens.add(sent.getTokens()[i].getToken());
    }
    for (int i = 0; i < sent.tokenLength(); i++) {
      sent.getTokens()[i].setLemma(tokens.get(i));
    }
    return sent;
  }

  // shows how to parse a sentences and call the tools
  public List<String> lemmatize(List<String> text) {

    // Create a data container for a sentence

    String[] s = new String[text.size() + 1];
    s[0] = "root";
    for (int j = 0; j < text.size(); j++)
      s[j + 1] = text.get(j);
    i.init(s);
    lemmatizer.apply(i);

    List<String> tags = new ArrayList<String>(i.plemmas.length - 1);
    for (int j = 1; j < i.plemmas.length; j++)
      tags.add(i.plemmas[j]);
    return tags;

  }

  public static void main(String argv[]) {
    // String s =
    // "What a Sunday! Miss anything? We've got you covered in @Windows Week 2 Review (it's not too soon to talk playoffs) � http://bit.ly/18BpV3z ";
    String s = "A U.S. official said Mr. Alexis joined the Navy in 2007, and was kicked out of the military in 2011 as a result of a gun arrest in Fort Worth, Texas. ";
    List<String> text = EuroLangTwokenizer.tokenize(s);
    System.out.println(text);
    AnnaLemmatizer en = new AnnaLemmatizer(
            "res/en/CoNLL2009-ST-English-ALL.anna-3.3.lemmatizer.model");
    int i = 0;
    List<String> tags = null;
    double start = System.currentTimeMillis();
    while (i++ < 100)
      tags = en.lemmatize(text);
    // System.out.println(tags);
    double end = System.currentTimeMillis();
    System.out.println(end - start);
    System.out.println(tags);
  }

  private static AnnaLemmatizer eslemma, enlemma;


  public static edu.cmu.geolocator.nlp.Lemmatizer getInstance(String string) throws Exception {
    if (string.equalsIgnoreCase("es")) {
      if (eslemma == null)
        eslemma = new AnnaLemmatizer("res/es/CoNLL2009-ST-Spanish-ALL.anna-3.3.lemmatizer.model");
      return eslemma;
    }
    if (string.equalsIgnoreCase("en")) {
      if (enlemma == null)
        enlemma = new AnnaLemmatizer("res/en/CoNLL2009-ST-English-ALL.anna-3.3.lemmatizer.model");
      return enlemma;
    }
    throw new Exception("Language not supported by Lemmatizer!");
  }
}