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.baseline;
025
026import java.lang.reflect.Type;
027import java.util.HashMap;
028import java.util.List;
029import java.util.Map;
030
031import org.cleartk.ml.Classifier;
032import org.cleartk.ml.CleartkProcessingException;
033import org.cleartk.ml.Feature;
034import org.cleartk.util.ReflectionUtil.TypeArgumentDelegator;
035
036/**
037 * 
038 * <br>
039 * Copyright (c) 2011, Regents of the University of Colorado <br>
040 * All rights reserved.
041 * 
042 * @author Steven Bethard
043 */
044public class SingleOutcomeClassifier<OUTCOME_TYPE> implements Classifier<OUTCOME_TYPE>,
045    TypeArgumentDelegator {
046
047  private OUTCOME_TYPE value;
048
049  public SingleOutcomeClassifier(OUTCOME_TYPE value) {
050    this.value = value;
051  }
052
053  @Override
054  public OUTCOME_TYPE classify(List<Feature> features) throws CleartkProcessingException {
055    return value;
056  }
057
058  @Override
059  public Map<OUTCOME_TYPE, Double> score(List<Feature> features) {
060    throw new UnsupportedOperationException("no scores available from a single value classifier");
061  }
062
063  @Override
064  public Map<String, Type> getTypeArguments(Class<?> genericType) {
065    Map<String, Type> result = new HashMap<String, Type>();
066    result.put("OUTCOME_TYPE", this.value.getClass());
067    return result;
068  }
069
070}