opennlp.tools.formats.muc.MucNameSampleStream 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.muc;
import java.io.IOException;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.List;
import opennlp.tools.namefind.NameSample;
import opennlp.tools.tokenize.Tokenizer;
import opennlp.tools.util.FilterObjectStream;
import opennlp.tools.util.ObjectStream;
public class MucNameSampleStream extends FilterObjectStream {
private final Tokenizer tokenizer;
private final List storedSamples = new ArrayList<>();
/**
* Initializes a {@link MucNameSampleStream}.
*
* @param tokenizer The {@link Tokenizer} to use. Must not be {@code null}.
* @param samples The {@link ObjectStream samples} as input.
* Must not be {@code null}.
*
* @throws IllegalArgumentException Thrown if parameters are invalid.
*/
protected MucNameSampleStream(Tokenizer tokenizer, ObjectStream samples) {
super(samples);
this.tokenizer = tokenizer;
}
@Override
public NameSample read() throws IOException {
if (storedSamples.isEmpty()) {
String document = samples.read();
if (document != null) {
// Note: This is a hack to fix invalid formatting in
// some MUC files ...
document = document.replace(">>", ">");
new SgmlParser().parse(new StringReader(document),
new MucNameContentHandler(tokenizer, storedSamples));
}
}
if (storedSamples.size() > 0) {
return storedSamples.remove(0);
}
else {
return null;
}
}
}