opennlp.tools.formats.moses.MosesSentenceSampleStream Maven / Gradle / Ivy
/*
* 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.moses;
import java.io.IOException;
import java.util.LinkedList;
import java.util.List;
import opennlp.tools.sentdetect.EmptyLinePreprocessorStream;
import opennlp.tools.sentdetect.SentenceSample;
import opennlp.tools.util.FilterObjectStream;
import opennlp.tools.util.ObjectStream;
import opennlp.tools.util.Span;
public class MosesSentenceSampleStream extends FilterObjectStream {
/**
* Initializes a {@link MosesSentenceSampleStream}.
*
* @param sentences The {@link ObjectStream samples} as input.
* Must not be {@code null}.
*
* @throws IllegalArgumentException Thrown if parameters are invalid.
*/
public MosesSentenceSampleStream(ObjectStream sentences) {
super(new EmptyLinePreprocessorStream(sentences));
}
@Override
public SentenceSample read() throws IOException {
StringBuilder sentencesString = new StringBuilder();
List sentenceSpans = new LinkedList<>();
String sentence;
for (int i = 0; i < 25 && (sentence = samples.read()) != null; i++) {
int begin = sentencesString.length();
sentence = sentence.trim();
sentencesString.append(sentence);
int end = sentencesString.length();
sentenceSpans.add(new Span(begin, end));
sentencesString.append(' ');
}
if (sentenceSpans.size() > 0) {
return new SentenceSample(sentencesString.toString(),
sentenceSpans.toArray(new Span[0]));
}
return null;
}
}