| /* |
| * 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.doccat; |
| |
| import java.util.Iterator; |
| |
| import opennlp.tools.ml.model.Event; |
| import opennlp.tools.util.AbstractEventStream; |
| import opennlp.tools.util.ObjectStream; |
| |
| /** |
| * Iterator-like class for modeling document classification events. |
| */ |
| public class DocumentCategorizerEventStream extends AbstractEventStream<DocumentSample> { |
| |
| private DocumentCategorizerContextGenerator mContextGenerator; |
| |
| /** |
| * Initializes the current instance. |
| * |
| * @param data {@link ObjectStream} of {@link DocumentSample}s |
| * |
| * @param featureGenerators |
| */ |
| public DocumentCategorizerEventStream(ObjectStream<DocumentSample> data, FeatureGenerator... featureGenerators) { |
| super(data); |
| |
| mContextGenerator = |
| new DocumentCategorizerContextGenerator(featureGenerators); |
| } |
| |
| /** |
| * Initializes the current instance. |
| * |
| * @param samples {@link ObjectStream} of {@link DocumentSample}s |
| */ |
| public DocumentCategorizerEventStream(ObjectStream<DocumentSample> samples) { |
| super(samples); |
| |
| mContextGenerator = |
| new DocumentCategorizerContextGenerator(new BagOfWordsFeatureGenerator()); |
| } |
| |
| @Override |
| protected Iterator<Event> createEvents(final DocumentSample sample) { |
| |
| return new Iterator<Event>(){ |
| |
| private boolean isVirgin = true; |
| |
| public boolean hasNext() { |
| return isVirgin; |
| } |
| |
| public Event next() { |
| |
| isVirgin = false; |
| |
| return new Event(sample.getCategory(), |
| mContextGenerator.getContext(sample.getText(), sample.getExtraInformation())); |
| } |
| |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| }}; |
| } |
| } |