adams.data.outlier.AbstractInstanceOutlierDetectorTestCase.java Source code

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Here is the source code for adams.data.outlier.AbstractInstanceOutlierDetectorTestCase.java

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/*
 *   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/>.
 */

/**
 * AbstractInstanceOutlierDetectorTestCase.java
 * Copyright (C) 2010 University of Waikato, Hamilton, New Zealand
 */
package adams.data.outlier;

import weka.core.Instances;
import weka.core.converters.ConverterUtils.DataSource;
import adams.data.instance.Instance;
import adams.test.AbstractTestHelper;
import adams.test.TestHelper;
import adams.test.TmpFile;

/**
 * Test case for outlier detectors that work on Instances.
 *
 * @author  fracpete (fracpete at waikato dot ac dot nz)
 * @version $Revision$
 */
public abstract class AbstractInstanceOutlierDetectorTestCase extends AbstractOutlierDetectorTestCase<Instance> {

    /**
     * Constructs the test case. Called by subclasses.
     *
     * @param name    the name of the test
     */
    public AbstractInstanceOutlierDetectorTestCase(String name) {
        super(name);
    }

    /**
     * Returns the test helper class to use.
     *
     * @return      the helper class instance
     */
    protected AbstractTestHelper newTestHelper() {
        return new TestHelper(this, "adams/data/outlier/data");
    }

    /**
     * Loads the data to process.
     *
     * @param filename   the filename to load (without path)
     * @return      the first instance in the dataset, or null if it failed
     *          to load; class attribute is always the last
     */
    protected Instance load(String filename) {
        Instance result;
        Instances data;

        result = new Instance();
        try {
            m_TestHelper.copyResourceToTmp(filename);
            data = DataSource.read(new TmpFile(filename).getAbsolutePath());
            data.setClassIndex(data.numAttributes() - 1);
            result.set(data.instance(0));
        } catch (Exception e) {
            e.printStackTrace();
            result = null;
        } finally {
            m_TestHelper.deleteFileFromTmp(filename);
        }

        return result;
    }
}