newoperatordialog.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.Yale;
import edu.udo.cs.yale.tools.GroupTree;
import edu.udo.cs.yale.tools.LogService;
import edu.udo.cs.yale.tools.OperatorService;
import edu.udo.cs.yale.tools.OperatorDescription;

import javax.swing.JDialog;
import javax.swing.JComboBox;
import javax.swing.JTextField;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JLabel;
import javax.swing.JTextArea;
import javax.swing.JScrollPane;
import javax.swing.text.JTextComponent;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.BorderFactory;
import java.awt.Frame;
import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import java.awt.event.*;
import java.util.Iterator;
import java.util.Set;
import java.util.TreeSet;
import java.util.List;
import java.util.LinkedList;
import java.util.Collections;

/** Dialog for creating a new operator. */
public class NewOperatorDialog extends JDialog implements ItemListener {

    private JTextField nameField = new JTextField("NewOperator");
    private JComboBox classCombo;
    private JComboBox groupCombo;
    private boolean ok = false;
    private JTextArea descriptionText = new JTextArea("",3,20);

    public NewOperatorDialog(Frame owner) {
	super(owner, "New operator", true);

	getContentPane().setLayout(new BorderLayout());
	JPanel rootPanel = new JPanel(new BorderLayout());
	rootPanel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
	getContentPane().add(rootPanel, BorderLayout.CENTER);

	JPanel buttonPanel = new JPanel(new FlowLayout(FlowLayout.RIGHT));

	JButton okButton = new JButton("Ok");
	okButton.addActionListener(new ActionListener() {
		public void actionPerformed(ActionEvent e) { ok(); }
	    });
	buttonPanel.add(okButton);

	JButton cancelButton = new JButton("Cancel");
	cancelButton.addActionListener(new ActionListener() {
		public void actionPerformed(ActionEvent e) { cancel(); }
	    });
	buttonPanel.add(cancelButton);
	rootPanel.add(buttonPanel, BorderLayout.SOUTH);


	groupCombo = new JComboBox();
	groupCombo.addItemListener(this);
	groupCombo.setEditable(false);
	groupCombo.addItem("All");
	Iterator i = OperatorService.getGroups().getSubGroups().iterator();
	while (i.hasNext()) {
	    groupCombo.addItem(((GroupTree)i.next()).getName());	    
	}
	groupCombo.setSelectedIndex(0);

	classCombo = new JComboBox();
	classCombo.addItemListener(this);
	classCombo.setEditable(true);

	setClasses();


	GridBagLayout mainLayout = new GridBagLayout();
	JPanel mainPanel = new JPanel(mainLayout);
	GridBagConstraints c = new GridBagConstraints();
	c.fill = GridBagConstraints.BOTH;


	JLabel label = new JLabel("Name");
	c.gridwidth = GridBagConstraints.RELATIVE;
	c.ipadx = 10;
	mainLayout.setConstraints(label, c);
	mainPanel.add(label);

	c.gridwidth = GridBagConstraints.REMAINDER;
	mainLayout.setConstraints(nameField, c);
	mainPanel.add(nameField);
	 
	label = new JLabel("Group");
	c.ipadx = 10;
	c.gridwidth = GridBagConstraints.RELATIVE;
	mainLayout.setConstraints(label, c);
	mainPanel.add(label);

	c.gridwidth = GridBagConstraints.REMAINDER;
	mainLayout.setConstraints(groupCombo, c);
	mainPanel.add(groupCombo);

	label = new JLabel("Class");
	c.ipadx = 10;
	c.gridwidth = GridBagConstraints.RELATIVE;
	mainLayout.setConstraints(label, c);
	mainPanel.add(label);

	c.gridwidth = GridBagConstraints.REMAINDER;
	mainLayout.setConstraints(classCombo, c);
	mainPanel.add(classCombo);


	descriptionText.setEditable(false);
	descriptionText.setLineWrap(true);
	descriptionText.setWrapStyleWord(true);
	descriptionText.setBackground(this.getBackground());
	c.gridwidth = GridBagConstraints.REMAINDER;
	JScrollPane textScrollPane = new JScrollPane(descriptionText);
	textScrollPane.setBorder(BorderFactory.createEmptyBorder(10,0,10,0));
	mainLayout.setConstraints(textScrollPane, c);
	mainPanel.add(textScrollPane);

	rootPanel.add(mainPanel, BorderLayout.NORTH);
	 
	pack();
	setLocationRelativeTo(owner);
    }

    private void ok() { 
	ok = true; 
	dispose(); 
    }

    private void cancel() { 
	ok = false; 
	dispose(); 
    }

    private Operator getOperatorInstance() {
	return getOperatorInstance((String)classCombo.getSelectedItem(), nameField.getText());
    }

    public static Operator getOperatorInstance(String classname, String name) {
	try {
	    Class operatorClass = OperatorService.getOperatorClass(classname);
	    Operator operator = (Operator)operatorClass.newInstance();
	    operator.register(Yale.getExperiment(), name);
	    return operator;
	} catch (Exception e) {
	    SwingTools.showErrorMessage("Cannot instantiate '"+name+"'.", e);
	    return null;
	}	
    }

    public static Operator newOperator(MainFrame mainFrame) {
	NewOperatorDialog dialog = new NewOperatorDialog(mainFrame);
	dialog.show();
	if (dialog.ok) return dialog.getOperatorInstance();
	else return null;
    }

    private void setClasses() {
	if (classCombo == null) return;
	
	String group = (String)groupCombo.getSelectedItem();
	Set sortedNames = null;
	if (group.equals("All")) {
	    sortedNames = new TreeSet(OperatorService.getOperatorNames());
	} else {
	    GroupTree parentGroup = OperatorService.getGroups();
	    sortedNames = parentGroup.getSubGroup(group).getAllOperators();
	}
	classCombo.removeAllItems();
	Iterator i = sortedNames.iterator();
	while (i.hasNext()) {
	    String current = (String)i.next();
	    classCombo.addItem(current);
	}
    }

    private void selectItem() {
	String typed = ((JTextField)classCombo.getEditor().getEditorComponent()).getText();
	for (int i = 0; i < classCombo.getItemCount(); i++) {
	    if (((String)classCombo.getItemAt(i)).startsWith(typed)) {
		classCombo.setSelectedIndex(i);
		break;
	    }
	}
    }

    public void itemStateChanged(ItemEvent e) {
	if (e.getSource().equals(classCombo)) {
	    String name = (String)classCombo.getSelectedItem();
	    OperatorDescription descr = OperatorService.getOperatorDescription(name);
	    if (descr != null)
		descriptionText.setText(descr.getDescription());
	} else if (e.getSource().equals(groupCombo)) 
	    setClasses();
    }
    
}