001    /*
002     * JNI_SVM-light - A Java Native Interface for SVM-light
003     * 
004     * Copyright (C) 2005 
005     * Tom Crecelius & Martin Theobald 
006     * Max-Planck Institute for Computer Science
007     * 
008     * This program is free software; you can redistribute it and/or modify it under
009     * the terms of the GNU General Public License as published by the Free Software
010     * Foundation.
011     * 
012     * This program is distributed in the hope that it will be useful, but WITHOUT
013     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
014     * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
015     * details.
016     * 
017     * You should have received a copy of the GNU General Public License along with
018     * this program; if not, write to the Free Software Foundation, Inc., 51
019     * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
020     */
021    
022    package jnisvmlight;
023    
024    import java.io.Serializable;
025    
026    /**
027     * Abstract kernel class.
028     * 
029     * @author Tom Crecelius & Martin Theobald
030     */
031    public abstract class Kernel implements Serializable {
032    
033      protected Kernel m_kernel;
034    
035      protected Kernel() {
036        this.m_kernel = null;
037      }
038    
039      protected Kernel(Kernel nestedKernel) {
040        this.m_kernel = nestedKernel;
041      }
042    
043      abstract public double evaluate(FeatureVector v1, FeatureVector v2);
044    
045      public Kernel getNestedKernel() {
046        return m_kernel;
047      }
048    
049      public void setNestedKernel(Kernel nestedKernel) {
050        m_kernel = nestedKernel;
051      }
052    }