opennlp.tools.formats.conllu.ConlluTokenSampleStream 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.conllu;
import java.io.IOException;
import opennlp.tools.tokenize.TokenSample;
import opennlp.tools.util.FilterObjectStream;
import opennlp.tools.util.ObjectStream;
import opennlp.tools.util.StringUtil;
public class ConlluTokenSampleStream extends FilterObjectStream {
/**
* Initializes a {@link ConlluTokenSampleStream}.
*
* @param samples The {@link ObjectStream samples} used as input.
*/
public ConlluTokenSampleStream(ObjectStream samples) {
super(samples);
}
@Override
public TokenSample read() throws IOException {
ConlluSentence sentence = samples.read();
if (sentence != null) {
if (sentence.getTextComment() != null) {
StringBuilder text = new StringBuilder(sentence.getTextComment());
int searchIndex = 0;
for (ConlluWordLine wordLine : sentence.getWordLines()) {
// skip over inserted words which are not in the source text
if (wordLine.getId().contains(".")) {
continue;
}
String token = wordLine.getForm();
int tokenIndex = text.indexOf(token, searchIndex);
if (tokenIndex == -1) {
throw new IOException(String.format("Failed to match token [%s] in sentence [%s] with text [%s]",
token, sentence.getSentenceIdComment(), text));
}
searchIndex = tokenIndex + token.length();
if (searchIndex < text.length()) {
if (!StringUtil.isWhitespace(text.charAt(searchIndex))) {
text.insert(searchIndex,
TokenSample.DEFAULT_SEPARATOR_CHARS);
}
}
}
return TokenSample.parse(text.toString(), TokenSample.DEFAULT_SEPARATOR_CHARS);
}
else {
throw new IOException("Sentence is missing raw text sample!");
}
}
return null;
}
}