001/** 
002 * Copyright (c) 2011, Regents of the University of Colorado 
003 * All rights reserved.
004 * 
005 * Redistribution and use in source and binary forms, with or without
006 * modification, are permitted provided that the following conditions are met:
007 * 
008 * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 
009 * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 
010 * Neither the name of the University of Colorado at Boulder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. 
011 * 
012 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
013 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
014 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
015 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
016 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
017 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
018 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
019 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
020 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
021 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
022 * POSSIBILITY OF SUCH DAMAGE. 
023 */
024package org.cleartk.ml.jar;
025
026import java.io.File;
027import java.io.FileNotFoundException;
028import java.util.List;
029
030import org.cleartk.ml.CleartkProcessingException;
031import org.cleartk.ml.Instance;
032import org.cleartk.ml.SequenceClassifier;
033import org.cleartk.ml.SequenceDataWriter;
034import org.cleartk.ml.encoder.features.FeaturesEncoder;
035import org.cleartk.ml.encoder.outcome.OutcomeEncoder;
036
037/**
038 * Superclass for {@link SequenceDataWriter} implementations that write training data to a file
039 * using {@link FeaturesEncoder}s and {@link OutcomeEncoder}s.
040 * 
041 * <br>
042 * Copyright (c) 2011, Regents of the University of Colorado <br>
043 * All rights reserved.
044 * 
045 * @author Steven Bethard
046 * @author Philip Ogren
047 */
048public abstract class SequenceDataWriter_ImplBase<CLASSIFIER_BUILDER_TYPE extends EncodingJarClassifierBuilder<? extends SequenceClassifier<OUTCOME_TYPE>, ENCODED_FEATURES_TYPE, OUTCOME_TYPE, ENCODED_OUTCOME_TYPE>, ENCODED_FEATURES_TYPE, OUTCOME_TYPE, ENCODED_OUTCOME_TYPE>
049    extends
050    EncodingDirectoryDataWriter<CLASSIFIER_BUILDER_TYPE, SequenceClassifier<OUTCOME_TYPE>, ENCODED_FEATURES_TYPE, OUTCOME_TYPE, ENCODED_OUTCOME_TYPE>
051    implements SequenceDataWriter<OUTCOME_TYPE> {
052
053  public SequenceDataWriter_ImplBase(File outputDirectory) throws FileNotFoundException {
054    super(outputDirectory);
055  }
056
057  public void write(List<Instance<OUTCOME_TYPE>> instances) throws CleartkProcessingException {
058    for (Instance<OUTCOME_TYPE> instance : instances) {
059      writeEncoded(
060          this.classifierBuilder.getFeaturesEncoder().encodeAll(instance.getFeatures()),
061          this.classifierBuilder.getOutcomeEncoder().encode(instance.getOutcome()));
062    }
063    this.writeEndSequence();
064  }
065
066  /**
067   * Write the encoded features and encoded outcome to the output directory.
068   * 
069   * @param features
070   *          The encoded features.
071   * @param outcome
072   *          The encoded outcome.
073   */
074  protected abstract void writeEncoded(ENCODED_FEATURES_TYPE features, ENCODED_OUTCOME_TYPE outcome)
075      throws CleartkProcessingException;
076
077  /**
078   * Write the marker for the end of a sequence. This will be called at the end of each
079   * {@link #write}, after all instances have been written by {@link #writeEncoded}.
080   */
081  protected abstract void writeEndSequence();
082
083}