opennlp.tools.formats.leipzig.SampleShuffleStream 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.leipzig;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Random;
import opennlp.tools.util.ObjectStream;
class SampleShuffleStream implements ObjectStream {
private List bufferedSamples = new ArrayList<>();
private Iterator sampleIt;
SampleShuffleStream(ObjectStream samples) throws IOException {
T sample;
while ((sample = samples.read()) != null) {
bufferedSamples.add(sample);
}
Collections.shuffle(bufferedSamples, new Random(23));
reset();
}
@Override
public T read() throws IOException {
if (sampleIt.hasNext()) {
return sampleIt.next();
}
return null;
}
@Override
public void reset() throws IOException, UnsupportedOperationException {
sampleIt = bufferedSamples.iterator();
}
}