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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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* Copyright (C) 2007 University of Waikato, Hamilton, New Zealand
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import weka.core.Instances;
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* Interface for filters that can be converted to Java source.
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* @author FracPete (fracpete at waikato dot ac dot nz)
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* @version $Revision: 1.1 $
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public interface Sourcable {
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* Returns a string that describes the filter as source. The
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* filter will be contained in a class with the given name (there may
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* be auxiliary classes),
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* and will contain two methods with these signatures:
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* public static Object[] filter(Object[] i);
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* // converts a full dataset (first dimension is row index)
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* public static Object[][] filter(Object[][] i);
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* where the array <code>i</code> contains elements that are either
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* Double, String, with missing values represented as null. The generated
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* code is public domain and comes with no warranty.
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* @param className the name that should be given to the source class.
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* @param data the dataset used for initializing the filter
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* @return the object source described by a string
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* @throws Exception if the source can't be computed
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public String toSource(String className, Instances data) throws Exception;