opennlp.tools.formats.letsmt.DetokenizeSentenceSampleStream 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.letsmt;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
import opennlp.tools.sentdetect.SentenceSample;
import opennlp.tools.tokenize.Detokenizer;
import opennlp.tools.tokenize.WhitespaceTokenizer;
import opennlp.tools.util.FilterObjectStream;
import opennlp.tools.util.ObjectStream;
import opennlp.tools.util.Span;
public class DetokenizeSentenceSampleStream
extends FilterObjectStream {
private final Detokenizer detokenizer;
public DetokenizeSentenceSampleStream(Detokenizer detokenizer, ObjectStream samples) {
super(samples);
this.detokenizer = Objects.requireNonNull(detokenizer);
}
@Override
public SentenceSample read() throws IOException {
SentenceSample sample = samples.read();
if (sample != null) {
List sentenceTexts = new ArrayList<>();
for (Span sentenceSpan : sample.getSentences()) {
sentenceTexts.add(sample.getDocument().substring(sentenceSpan.getStart(), sentenceSpan.getEnd()));
}
StringBuilder documentText = new StringBuilder();
List newSentenceSpans = new ArrayList<>();
for (String sentenceText : sentenceTexts) {
String[] tokens = WhitespaceTokenizer.INSTANCE.tokenize(sentenceText);
int begin = documentText.length();
documentText.append(detokenizer.detokenize(tokens, null));
newSentenceSpans.add(new Span(begin, documentText.length()));
documentText.append(' ');
}
return new SentenceSample(documentText, newSentenceSpans.toArray(new Span[newSentenceSpans.size()]));
}
return null;
}
}