Validation How to Example : Data Validation « Swing Components « Java
Validation How to Example
/*
Code revised from Desktop Java Live:
http://www.sourcebeat.com/downloads/
*/
import java.awt.event.ActionEvent;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import javax.swing.AbstractAction;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
import com.jgoodies.forms.builder.DefaultFormBuilder;
import com.jgoodies.forms.layout.CellConstraints;
import com.jgoodies.forms.layout.FormLayout;
import com.jgoodies.validation.ValidationResult;
import com.jgoodies.validation.util.DefaultValidationResultModel;
import com.jgoodies.validation.util.ValidationResultModel;
import com.jgoodies.validation.util.ValidationUtils;
import com.jgoodies.validation.view.ValidationResultViewFactory;
public class ValidationHowExample extends JPanel {
private JTextField nameField;
private JTextField siteField;
private JTextField feedField;
private Feed feed;
private ValidationResultModel validationResultModel;
private ShowFeedInformationAction showFeedInformationAction;
public ValidationHowExample() {
DefaultFormBuilder formBuilder = new DefaultFormBuilder(new FormLayout(""));
formBuilder.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
formBuilder.appendColumn("right:pref");
formBuilder.appendColumn("3dlu");
formBuilder.appendColumn("fill:p:g");
this.nameField = new JTextField();
formBuilder.append("Name:", this.nameField);
this.siteField = new JTextField();
formBuilder.append("Site Url:", this.siteField);
this.feedField = new JTextField();
formBuilder.append("Feed Url:", this.feedField);
this.validationResultModel = new DefaultValidationResultModel();
this.validationResultModel.addPropertyChangeListener(new ValidationListener());
JComponent validationResultsComponent = ValidationResultViewFactory.createReportList(validationResultModel);
formBuilder.appendRow("top:30dlu:g");
CellConstraints cc = new CellConstraints();
formBuilder.add(validationResultsComponent, cc.xywh(1, formBuilder.getRow() + 1, 3, 1, "fill, fill"));
formBuilder.nextLine(2);
formBuilder.append(new JButton(new ValidateAction()), 3);
this.showFeedInformationAction = new ShowFeedInformationAction();
formBuilder.append(new JButton(this.showFeedInformationAction), 3);
createFeed();
initializeFormElements();
add(formBuilder.getPanel());
}
private ValidationResult validateIt() {
ValidationResult validationResult = new ValidationResult();
if (ValidationUtils.isEmpty(this.nameField.getText())) {
validationResult.addError("The name field can not be blank.");
} else if (!ValidationUtils.hasBoundedLength(this.nameField.getText(), 5, 14)) {
validationResult.addError("The name field must be between 5 and 14 characters.");
}
if (!"ClientJava.com".equals(this.nameField.getText())) {
validationResult.addWarning("This form prefers the feed ClientJava.com");
}
if (ValidationUtils.isEmpty(this.feedField.getText())) {
validationResult.addError("The feed field can not be blank.");
}
if (ValidationUtils.isEmpty(this.siteField.getText())) {
validationResult.addError("The site field can not be blank.");
}
return validationResult;
}
private class ValidationListener implements PropertyChangeListener {
public void propertyChange(PropertyChangeEvent evt) {
if (evt.getPropertyName() == ValidationResultModel.PROPERTYNAME_RESULT) {
JOptionPane.showMessageDialog(null, "Validation has been performed");
showFeedInformationAction.setEnabled(!validationResultModel.hasErrors());
} else if (evt.getPropertyName() == ValidationResultModel.PROPERTYNAME_MESSAGES) {
if (Boolean.TRUE.equals(evt.getNewValue())) {
JOptionPane.showMessageDialog(null, "Messages have been found.");
}
}
}
}
private Feed getFeed() {
return this.feed;
}
private void createFeed() {
this.feed = new Feed();
this.feed.setName("ClientJava.com");
this.feed.setSiteUrl("http://www.clientjava.com/blog");
this.feed.setFeedUrl("http://www.clientjava.com/blog/rss.xml");
}
private void initializeFormElements() {
this.nameField.setText(this.feed.getName());
this.siteField.setText(this.feed.getSiteUrl());
this.feedField.setText(this.feed.getFeedUrl());
}
private void synchFormAndFeed() {
this.feed.setName(this.nameField.getText());
this.feed.setSiteUrl(this.siteField.getText());
this.feed.setFeedUrl(this.feedField.getText());
}
private class ValidateAction extends AbstractAction {
public ValidateAction() {
super("Validate");
}
public void actionPerformed(ActionEvent e) {
synchFormAndFeed();
ValidationResult validationResult = validateIt();
validationResultModel.setResult(validationResult);
}
}
private class ShowFeedInformationAction extends AbstractAction {
public ShowFeedInformationAction() {
super("Show Feed Information");
setEnabled(false);
}
public void actionPerformed(ActionEvent event) {
StringBuffer message = new StringBuffer();
message.append("<html>");
message.append("<b>Name:</b> ");
message.append(getFeed().getName());
message.append("<br>");
message.append("<b>Site URL:</b> ");
message.append(getFeed().getSiteUrl());
message.append("<br>");
message.append("<b>Feed URL:</b> ");
message.append(getFeed().getFeedUrl());
message.append("</html>");
JOptionPane.showMessageDialog(null, message.toString());
}
}
public static void main(String[] a){
JFrame f = new JFrame("How To Validate Example");
f.setDefaultCloseOperation(2);
f.add(new ValidationHowExample());
f.pack();
f.setVisible(true);
}
}
jgoodiesValidation.zip( 277 k)
