/*
* 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.lemmatizer;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import opennlp.tools.util.FilterObjectStream;
import opennlp.tools.util.ObjectStream;
/**
* This dummy lemma sample stream reads a file containing forms, postags, gold
* lemmas, and predicted lemmas. It can be used together with DummyLemmatizer
* simulate a lemmatizer.
*/
public class DummyLemmaSampleStream
extends FilterObjectStream<String, LemmaSample> {
private boolean mIsPredicted;
private int count = 0;
// the predicted flag sets if the stream will contain the expected or the
// predicted tags.
public DummyLemmaSampleStream(ObjectStream<String> samples,
boolean isPredicted) {
super(samples);
mIsPredicted = isPredicted;
}
public LemmaSample read() throws IOException {
List<String> toks = new ArrayList<>();
List<String> posTags = new ArrayList<>();
List<String> goldLemmas = new ArrayList<>();
List<String> predictedLemmas = new ArrayList<>();
for (String line = samples.read(); line != null
&& !line.equals(""); line = samples.read()) {
String[] parts = line.split("\t");
if (parts.length != 4) {
System.err.println("Skipping corrupt line " + count + ": " + line);
} else {
toks.add(parts[0]);
posTags.add(parts[1]);
goldLemmas.add(parts[2]);
predictedLemmas.add(parts[3]);
}
count++;
}
if (toks.size() > 0) {
if (mIsPredicted) {
return new LemmaSample(toks.toArray(new String[toks.size()]),
posTags.toArray(new String[posTags.size()]),
predictedLemmas.toArray(new String[predictedLemmas.size()]));
} else
return new LemmaSample(toks.toArray(new String[toks.size()]),
posTags.toArray(new String[posTags.size()]),
goldLemmas.toArray(new String[goldLemmas.size()]));
} else {
return null;
}
}
}