opennlp.tools.formats.brat.SegmenterObjectStream 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.brat;
import java.io.IOException;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import opennlp.tools.util.FilterObjectStream;
import opennlp.tools.util.ObjectStream;
public abstract class SegmenterObjectStream extends FilterObjectStream {
private Iterator sampleIt = Collections.emptySet().iterator();
public SegmenterObjectStream(ObjectStream in) {
super(in);
}
protected abstract List read(S sample) throws IOException;
public final T read() throws IOException {
if (sampleIt.hasNext()) {
return sampleIt.next();
}
else {
S inSample = samples.read();
if (inSample != null) {
List outSamples = read(inSample);
if (outSamples != null) {
sampleIt = outSamples.iterator();
}
return read();
}
}
return null;
}
}