valuecelleditor.java

一个很好的LIBSVM的JAVA源码。对于要研究和改进SVM算法的学者。可以参考。来自数据挖掘工具YALE工具包。

/*
 *  YALE - Yet Another Learning Environment
 *  Copyright (C) 2001-2004
 *      Simon Fischer, Ralf Klinkenberg, Ingo Mierswa, 
 *          Katharina Morik, Oliver Ritthoff
 *      Artificial Intelligence Unit
 *      Computer Science Department
 *      University of Dortmund
 *      44221 Dortmund,  Germany
 *  email: [e-mail]
 *  web:   http://yale.cs.uni-dortmund.de/
 *
 *  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 2 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, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 *  USA.
 */
package edu.udo.cs.yale.gui;

import edu.udo.cs.yale.operator.Operator;
import edu.udo.cs.yale.operator.Value;
import edu.udo.cs.yale.operator.parameter.ParameterType;
import edu.udo.cs.yale.operator.parameter.ParameterTypeValue;
import edu.udo.cs.yale.Experiment;

import javax.swing.JTable;
import javax.swing.JPanel;
import javax.swing.JComboBox;
import javax.swing.AbstractCellEditor;
import java.awt.Component;
import java.awt.GridLayout;
import java.awt.event.ItemListener;
import java.awt.event.ItemEvent;
import java.util.Collections;
import java.util.List;
import java.util.Iterator;
import java.util.Vector;

/** Parameter editor for {@link ParameterTypeValue}.
 *  @version $Id: ValueCellEditor.java,v 2.4 2004/08/27 11:57:33 ingomierswa Exp $ */
public class ValueCellEditor extends AbstractCellEditor implements PropertyCellEditor {

    private JPanel panel                = new JPanel();
    private JComboBox operatorCombo;
    private JComboBox typeCombo         = new JComboBox(new String[] {"value", "parameter"});
    private JComboBox valueCombo        = new JComboBox();

    private Experiment experiment;
    private ParameterTypeValue type;

    public ValueCellEditor(ParameterTypeValue type, Experiment experiment) {
	this.type = type;
	this.experiment = experiment;
	operatorCombo = createOperatorCombo();
	typeCombo.addItemListener(new ItemListener() {
		public void itemStateChanged(ItemEvent e) {
		    fillValueCombo();
		    fireEditingStopped();
		}
	    });
	valueCombo.addItemListener(new ItemListener() {
		public void itemStateChanged(ItemEvent e) {
		    fireEditingStopped();
		}
	    });

	fillValueCombo();

	panel.setLayout(new GridLayout(1,3)); 

	panel.add(operatorCombo);
	panel.add(typeCombo);
	panel.add(valueCombo);
    }

    private JComboBox createOperatorCombo() {
	Vector allOps = new Vector(experiment.getAllOperatorNames());
	Collections.sort(allOps);
	JComboBox combo = new JComboBox(allOps);
	combo.addItemListener(new ItemListener() {
		public void itemStateChanged(ItemEvent e) {
		    fillValueCombo();
		    fireEditingStopped();
		}
	    });
	return combo;
    }

    private void fillValueCombo() {
	valueCombo.removeAllItems();
	Operator operator = experiment.getOperator((String)operatorCombo.getSelectedItem());
	switch (typeCombo.getSelectedIndex()) {
	case 0:
	    Iterator i = operator.getValues().iterator();
	    while (i.hasNext()) {
		valueCombo.addItem(((Value)i.next()).getKey());
	    }
	    if (valueCombo.getItemCount() == 0) valueCombo.addItem("no values");
	    break;
	case 1:
	    i = operator.getParameterTypes().iterator();
	    while (i.hasNext()) {
		valueCombo.addItem(((ParameterType)i.next()).getKey());
	    }
	    if (valueCombo.getItemCount() == 0) valueCombo.addItem("no params");
	    break;
	}
	valueCombo.setSelectedIndex(0);
    }


    public Object getCellEditorValue() {
	return "operator." +
	    operatorCombo.getSelectedItem() + "." +
	    ((typeCombo.getSelectedIndex() == 0) ? "value":"parameter") + "." +
	    valueCombo.getSelectedItem();
    }

    public void setValue(String valueName) {
	if (valueName != null) {
	    String[] components = valueName.split("\\.");
	    if (components.length == 4) {
		String operator = components[1];
		int type        = components[2].equals("parameter") ? 1 : 0;
		String name     = components[3];
		operatorCombo.setSelectedItem(operator);
		typeCombo.setSelectedIndex(type);
		valueCombo.setSelectedItem(name);
	    } else {
		operatorCombo.setSelectedIndex(0);
		typeCombo.setSelectedIndex(0);
		valueCombo.setSelectedIndex(0);
	    }
	} else {
	    operatorCombo.setSelectedIndex(0);
	    typeCombo.setSelectedIndex(0);
	    valueCombo.setSelectedIndex(0);
	}
    }

    public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int col) {
	setValue((String)value);
	return panel;
    }

    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
	return getTableCellEditorComponent(table, value, isSelected, row, column);
    }

    public boolean useEditorAsRenderer() {
	return true;
    }

}