opennlp-tools/src/main/java/opennlp/tools/formats/muc/Muc6NameSampleStreamFactory.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.
 */

package opennlp.tools.formats.muc;

import java.io.File;
import java.nio.charset.StandardCharsets;

import opennlp.tools.cmdline.ArgumentParser;
import opennlp.tools.cmdline.ArgumentParser.ParameterDescription;
import opennlp.tools.cmdline.StreamFactoryRegistry;
import opennlp.tools.cmdline.params.BasicFormatParams;
import opennlp.tools.cmdline.tokenizer.TokenizerModelLoader;
import opennlp.tools.formats.AbstractSampleStreamFactory;
import opennlp.tools.formats.DirectorySampleStream;
import opennlp.tools.formats.convert.FileToStringSampleStream;
import opennlp.tools.namefind.NameSample;
import opennlp.tools.tokenize.Tokenizer;
import opennlp.tools.tokenize.TokenizerME;
import opennlp.tools.tokenize.TokenizerModel;
import opennlp.tools.util.ObjectStream;
import opennlp.tools.util.StringUtil;

public class Muc6NameSampleStreamFactory extends AbstractSampleStreamFactory<NameSample> {

  protected Muc6NameSampleStreamFactory() {
    super(Parameters.class);
  }

  public static void registerFactory() {
    StreamFactoryRegistry.registerFactory(NameSample.class, "muc6",
        new Muc6NameSampleStreamFactory());
  }

  public ObjectStream<NameSample> create(String[] args) {

    Parameters params = ArgumentParser.parse(args, Parameters.class);

    TokenizerModel tokenizerModel = new TokenizerModelLoader().load(params.getTokenizerModel());
    Tokenizer tokenizer = new TokenizerME(tokenizerModel);

    ObjectStream<String> mucDocStream = new FileToStringSampleStream(
        new DirectorySampleStream(params.getData(),
            file -> StringUtil.toLowerCase(file.getName()).endsWith(".sgm"), false),
        StandardCharsets.UTF_8);

    return new MucNameSampleStream(tokenizer, mucDocStream);
  }

  interface Parameters extends BasicFormatParams {
    @ParameterDescription(valueName = "modelFile")
    File getTokenizerModel();
  }
}