parametervaluecelleditor.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.OperatorChain;
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.JTextField;
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: ParameterValueCellEditor.java,v 2.2 2004/08/27 11:57:33 ingomierswa Exp $ */
public class ParameterValueCellEditor extends AbstractCellEditor implements PropertyCellEditor {

    private JPanel panel              = new JPanel();
    private JComboBox operatorCombo   = new JComboBox();
    private JComboBox parameterCombo  = new JComboBox();
    private JTextField parameterField = new JTextField("unknown");

    private OperatorChain parentOperator;
    private Experiment experiment;
    private ParameterTypeValue type;

    public ParameterValueCellEditor(ParameterTypeValue type, Experiment experiment, OperatorChain parentOperator) {
	this.type           = type;
	this.parentOperator = parentOperator;
	this.experiment     = experiment;
	operatorCombo       = createOperatorCombo();
	parameterCombo.addItemListener(new ItemListener() {
		public void itemStateChanged(ItemEvent e) {
		    parameterField.setText("unknown");
		    fireEditingStopped();
		}
	    });
	
	fillParameterCombo();

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

	panel.add(operatorCombo);
	panel.add(parameterCombo);
	panel.add(parameterField);
    }

    private JComboBox createOperatorCombo() {
	List allInnerOps = parentOperator.getAllInnerOperators();
	Vector allOpNames = new Vector();
	Iterator i = allInnerOps.iterator();
	while (i.hasNext())
	    allOpNames.add(((Operator)i.next()).getName());
	Collections.sort(allOpNames);
	JComboBox combo = new JComboBox(allOpNames);
	combo.addItemListener(new ItemListener() {
		public void itemStateChanged(ItemEvent e) {
		    fillParameterCombo();
		    fireEditingStopped();
		}
	    });
	if (combo.getItemCount() == 0) combo.addItem("add inner operators");
	return combo;
    }

    private void fillParameterCombo() {
	parameterCombo.removeAllItems();
	Operator operator = experiment.getOperator((String)operatorCombo.getSelectedItem());
	if (operator != null) {
	    Iterator i = operator.getParameterTypes().iterator();
	    while (i.hasNext()) {
		parameterCombo.addItem(((ParameterType)i.next()).getKey());
	    }
	}
	if (parameterCombo.getItemCount() == 0) parameterCombo.addItem("no params");
	parameterCombo.setSelectedIndex(0);
    }


    public Object getCellEditorValue() {
	String result = "operator#" +
	    operatorCombo.getSelectedItem() + "#" +
	    parameterCombo.getSelectedItem() + "#" +
	    parameterField.getText();
	return result;
    }

    public void setValue(String valueName) {
	if (valueName != null) {
	    String[] components = valueName.split("#");
	    if (components.length == 3) {
		String operator       = components[1];
		String parameterName  = components[2];
		operatorCombo.setSelectedItem(operator);
		parameterCombo.setSelectedItem(parameterName);

		Operator op = experiment.getOperator(operator);
		ParameterType type = op.getParameters().getParameterType(parameterName);
		Object defaultValue = type.getDefaultValue();
		if (defaultValue != null)
		    parameterField.setText(defaultValue.toString());
		else 
		    parameterField.setText("unknown");
	    } else if (components.length == 4) {
		String operator       = components[1];
		String parameterName  = components[2];
		String parameterValue = components[3];
		operatorCombo.setSelectedItem(operator);
		parameterCombo.setSelectedItem(parameterName);
		if (parameterValue.equals("unknown")) {
		    Operator op = experiment.getOperator(operator);
		    ParameterType type = op.getParameters().getParameterType(parameterName);
		    Object defaultValue = type.getDefaultValue();
		    if (defaultValue != null)
			parameterField.setText(defaultValue.toString());
		    else 
			parameterField.setText("unknown");
		} else {
		    parameterField.setText(parameterValue);
		}
	    } else {
		operatorCombo.setSelectedIndex(0);
		parameterCombo.setSelectedIndex(0);
		parameterField.setText("unknown");
	    }
	} else {
	    operatorCombo.setSelectedIndex(0);
	    parameterCombo.setSelectedIndex(0);
	    parameterField.setText("unknown");
	}
    }

    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;
    }

}