org.deeplearning4j.text.sentenceiterator.interoperability.SentenceIteratorConverter Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2015-2018 Skymind, Inc.
*
* This program and the accompanying materials are made available under the
* terms of the Apache License, Version 2.0 which is available at
* https://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.
*
* SPDX-License-Identifier: Apache-2.0
******************************************************************************/
package org.deeplearning4j.text.sentenceiterator.interoperability;
import lombok.NonNull;
import org.deeplearning4j.text.documentiterator.LabelAwareIterator;
import org.deeplearning4j.text.documentiterator.LabelledDocument;
import org.deeplearning4j.text.documentiterator.LabelsSource;
import org.deeplearning4j.text.sentenceiterator.SentenceIterator;
import org.deeplearning4j.text.sentenceiterator.labelaware.LabelAwareSentenceIterator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.List;
/**
* Simple class providing compatibility between SentenceIterator/LabelAwareSentenceIterator and LabelAwareIterator
*
* @author [email protected]
*/
public class SentenceIteratorConverter implements LabelAwareIterator {
private SentenceIterator backendIterator;
private LabelsSource generator;
protected static final Logger log = LoggerFactory.getLogger(SentenceIteratorConverter.class);
public SentenceIteratorConverter(@NonNull SentenceIterator iterator) {
this.backendIterator = iterator;
this.generator = new LabelsSource();
}
public SentenceIteratorConverter(@NonNull SentenceIterator iterator, @NonNull LabelsSource generator) {
this.backendIterator = iterator;
this.generator = generator;
}
@Override
public boolean hasNextDocument() {
return backendIterator.hasNext();
}
@Override
public LabelledDocument nextDocument() {
LabelledDocument document = new LabelledDocument();
document.setContent(backendIterator.nextSentence());
if (backendIterator instanceof LabelAwareSentenceIterator) {
List labels = ((LabelAwareSentenceIterator) backendIterator).currentLabels();
if (labels != null) {
for (String label : labels) {
document.addLabel(label);
generator.storeLabel(label);
}
} else {
String label = ((LabelAwareSentenceIterator) backendIterator).currentLabel();
if (label != null) {
document.addLabel(label);
generator.storeLabel(label);
}
}
} else if (generator != null)
document.addLabel(generator.nextLabel());
return document;
}
@Override
public void reset() {
generator.reset();
backendIterator.reset();
}
@Override
public boolean hasNext() {
return hasNextDocument();
}
@Override
public LabelledDocument next() {
return nextDocument();
}
@Override
public void remove() {
// no-op
}
@Override
public LabelsSource getLabelsSource() {
return generator;
}
@Override
public void shutdown() {
// no-op
}
}