opennlp.tools.namefind.NameSampleDataStream 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.namefind;
import java.io.IOException;
import opennlp.maxent.DataStream;
import opennlp.tools.util.FilterObjectStream;
import opennlp.tools.util.ObjectStream;
/**
* The {@link NameSampleDataStream} class converts tagged {@link String}s
* provided by a {@link DataStream} to {@link NameSample} objects.
* It uses text that is is one-sentence per line and tokenized
* with names identified by <START> and <END> tags.
*/
public class NameSampleDataStream extends FilterObjectStream {
public static final String START_TAG_PREFIX = " in) {
super(in);
}
public NameSample read() throws IOException {
String token = samples.read();
boolean isClearAdaptiveData = false;
// An empty line indicates the begin of a new article
// for which the adaptive data in the feature generators
// must be cleared
while (token != null && token.trim().length() == 0) {
isClearAdaptiveData = true;
token = samples.read();
}
if (token != null) {
return NameSample.parse(token, isClearAdaptiveData);
}
else {
return null;
}
}
}