Java tutorial
/* * Copyright (C) 2013 Serdar * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package de.fub.maps.project.detector.model.inference.processhandler; import de.fub.maps.project.detector.model.gpx.TrackSegment; import de.fub.maps.project.detector.model.inference.AbstractInferenceModel; import de.fub.maps.project.detector.model.inference.InferenceMode; import de.fub.maps.project.detector.model.inference.ui.EvaluationPanel; import de.fub.maps.project.detector.model.xmls.ProcessHandlerDescriptor; import de.fub.maps.project.detector.model.xmls.Property; import java.util.ArrayList; import java.util.Collection; import java.util.HashMap; import java.util.HashSet; import java.util.Map.Entry; import java.util.Random; import javax.swing.JComponent; import javax.swing.SwingUtilities; import org.openide.util.NbBundle; import org.openide.util.lookup.ServiceProvider; import weka.classifiers.Evaluation; import weka.core.Attribute; import weka.core.Instance; import weka.core.Instances; /** * * @author Serdar */ @NbBundle.Messages({ "LBL_Detector_crossvalidation_Title=Crossvalidation", "CLT_CrossvalidationProcessHandle_Name=Crossvalidation ProcessHandler", "CLT_CrossvalidationProcessHandle_Description=No description available", "CLT_CrossvalidationProcessHandle_Property_CrossVaidation_Folds_Name=Crossvalidation Folds", "CLT_CrossvalidationProcessHandle_Property_CrossVaidation_Folds_Description=This property indicates the amoung of folds for the crossvalidation evaluation" }) @ServiceProvider(service = InferenceModelProcessHandler.class) public class CrossValidationProcessHandler extends EvaluationProcessHandler { private EvaluationPanel evaluationPanel = null; private static final String CROSSVALIDATION_FOLDS_COUNT = "trainings.set.crossvalidation.fold"; public CrossValidationProcessHandler() { super(null); } public CrossValidationProcessHandler(AbstractInferenceModel inferenceModel) { super(inferenceModel); } @Override protected void handle() { Collection<Attribute> attributeList = getInferenceModel().getAttributes(); Instances trainingSet = new Instances("Classes", new ArrayList<Attribute>(attributeList), 9); trainingSet.setClassIndex(0); HashMap<String, HashSet<TrackSegment>> dataset = getInferenceModel().getInput().getTrainingsSet(); for (Entry<String, HashSet<TrackSegment>> entry : dataset.entrySet()) { for (TrackSegment trackSegment : entry.getValue()) { Instance instance = getInstance(entry.getKey(), trackSegment); trainingSet.add(instance); } } assert trainingSet.numInstances() > 0 : "Training set is empty and has no instances"; //NO18N evaluate(trainingSet); } private void evaluate(Instances trainingSet) { try { Evaluation evaluation = new Evaluation(trainingSet); int crossValidationFoldsCount = getCrossValidationFoldsCount(); crossValidationFoldsCount = crossValidationFoldsCount > trainingSet.size() ? trainingSet.size() : crossValidationFoldsCount; evaluation.crossValidateModel(getInferenceModel().getClassifier(), trainingSet, crossValidationFoldsCount, new Random(1)); updateVisualRepresentation(evaluation); } catch (Exception ex) { throw new InferenceModelClassifyException(ex.getMessage(), ex); } } @Override protected void updateVisualRepresentation(final Evaluation evaluation) { SwingUtilities.invokeLater(new Runnable() { @Override public void run() { getEvaluationPanel().updatePanel(evaluation); } }); } private int getCrossValidationFoldsCount() { for (Property property : getDescriptor().getProperties().getPropertyList()) { if (CROSSVALIDATION_FOLDS_COUNT.equals(property.getId())) { return Integer.parseInt(property.getValue()); } } return 10; } @Override public JComponent getVisualRepresentation() { return getEvaluationPanel(); } private EvaluationPanel getEvaluationPanel() { if (evaluationPanel == null) { evaluationPanel = new EvaluationPanel(); evaluationPanel.getTitle().setText(Bundle.LBL_Detector_crossvalidation_Title()); } return evaluationPanel; } @Override protected ProcessHandlerDescriptor createDefaultDescriptor() { ProcessHandlerDescriptor descriptor = new ProcessHandlerDescriptor(); descriptor.setJavaType(CrossValidationProcessHandler.class.getName()); descriptor.setName(Bundle.CLT_CrossvalidationProcessHandle_Name()); descriptor.setDescription(Bundle.CLT_CrossvalidationProcessHandle_Description()); descriptor.setInferenceMode(InferenceMode.CROSS_VALIDATION_MODE); Property property = new Property(); property.setId(CROSSVALIDATION_FOLDS_COUNT); property.setJavaType(Integer.class.getName()); property.setValue("10"); property.setName(Bundle.CLT_CrossvalidationProcessHandle_Property_CrossVaidation_Folds_Name()); property.setDescription( Bundle.CLT_CrossvalidationProcessHandle_Property_CrossVaidation_Folds_Description()); descriptor.getProperties().getPropertyList().add(property); return descriptor; } }