opennlp.tools.formats.ontonotes.DocumentToLineStream 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.ontonotes;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import opennlp.tools.formats.brat.SegmenterObjectStream;
import opennlp.tools.util.ObjectStream;
/**
* Reads a plain text file and return each line as a {@link String} object.
*/
public class DocumentToLineStream extends SegmenterObjectStream {
/**
* Initializes a {@link DocumentToLineStream}.
*
* @param samples The {@link ObjectStream samples} as input.
* Must not be {@code null}.
*
* @throws IllegalArgumentException Thrown if parameters are invalid.
*/
public DocumentToLineStream(ObjectStream samples) {
super(samples);
}
@Override
protected List read(String sample) throws IOException {
List lines = Arrays.asList(sample.split("\n"));
// documents must be empty line terminated
if (!lines.get(lines.size() - 1).trim().isEmpty()) {
lines = new ArrayList<>(lines);
lines.add("");
}
return lines;
}
}