GWT Validation Library Showcase

/*
 * 
 * Copyright 2009 Anatol Gregory Mayen
 * 
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *  
 *  http://www.apache.org/licenses/LICENSE-2.0
 *  
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License. 
 */ 
 
 
/**
 * A showcase for the GWT Validation Library.
 * 
 * @author Anatol Gregory Mayen
 */
 
 
public class ValidationShowcase implements EntryPoint {

	private TextBox integerTextBox1, integerTextBox2;
	private TextBox stringTextBox1, stringTextBox2;
	private TextBox uppercaseTextBox, trimmedUppercaseTextBox;
	private TextBox caesarTextBox;
	private TextBox regexEntryTextBox;
	private TextBox regexValidateEntryTextBox;
	private DisclosurePanel allErrorsPanel;
	private PopupDescription popupDesc;
	
	private ValidationProcessor validator;

	/**
	 * This is the entry point method.
	 */
	public void onModuleLoad() {

		setup();
		setupValidation();

		FormLayoutPanel form = new FormLayoutPanel();

		form.add("Positive integer", integerTextBox1, true)
		.addDelimiter("")
		.add("Integer in Range [-5,30]", integerTextBox2, true)
		.newRow()
		.add("String length < 5", stringTextBox1, true)
		.addDelimiter("")
		.add("String length in Range [2,5]", stringTextBox2, true)
		.newRow()
		.add(null, allErrorsPanel, false, 1, 5)
		.create();
		
		Button validateButton = new Button("Validate!");
		
		
		validateButton.addClickListener(new ClickListener() {
			public void onClick(Widget sender) {
				validator.validate();
			}
		});
		
		Button resetButton = new Button("Reset validations!");
		resetButton.addClickListener(new ClickListener() {
			public void onClick(Widget sender) {
				validator.reset();
			}
		});
		
		
		HorizontalPanel hp = new HorizontalPanel();
		hp.add(resetButton);
		hp.add(validateButton);
		VerticalPanel vp = new VerticalPanel();
		vp.add(form);
		vp.add(hp);
		
		//Setup transformation panel
		
		Button transformButton = new Button("Transform!");
		transformButton.addClickListener(new ClickListener() {
			public void onClick(Widget sender) {
				transValidator.validate();
			}
		});
		
		FormLayoutPanel transformationForm = new FormLayoutPanel();
		transformationForm.add("Uppercase transformation", uppercaseTextBox, false)
			.add("Trimmed uppercase transformation", trimmedUppercaseTextBox, false)
			.newRow()
			.add("Encrypt with Caesar cipher", caesarTextBox, false)
			.create();
		VerticalPanel transformationPanel = new VerticalPanel();
		transformationPanel.add(transformationForm);
		transformationPanel.add(transformButton);

		DecoratorPanel sourcePanel = new DecoratorPanel();
		HTML sourceCode = new HTML();
		sourceCode.setText(getSourceCodeText());
		sourcePanel.add(sourceCode);
		
		TabPanel tabPanel = new TabPanel();
		tabPanel.add(vp, "Showcase");
		tabPanel.add(transformationPanel, "Transformations");
		tabPanel.add(sourcePanel, "Source code");
		tabPanel.selectTab(0);
		
		RootPanel.get("main").add(tabPanel);

	}

	private void setup() {
		integerTextBox1 = new TextBox();
		integerTextBox2 = new TextBox();
		stringTextBox1 = new TextBox();
		stringTextBox2 = new TextBox();
		allErrorsPanel = new DisclosurePanel("All Errors");
		uppercaseTextBox = new TextBox();
		trimmedUppercaseTextBox = new TextBox();
		caesarTextBox = new TextBox();
	}
	
	private String getSourceCodeText() {
		Element sourceCode = DOM.getElementById("sourceCode");
		String html = sourceCode.getInnerHTML();
		sourceCode.setInnerHTML("");
		return html;
	}
	
	
	private void setupValidation() {
		validator = new DefaultValidationProcessor(showcaseMessages);
		popupDesc = new PopupDescription(showcaseMessages);
		FocusAction focusAction = new FocusAction();
		
		validator.addValidators("positiveInteger",
				new IntegerValidator(integerPositiveTextBox, 0, Integer.MAX_VALUE)
					.addActionForFailure(focusAction)
					.addActionForFailure(new StyleAction("validationFailedBorder"))
					//.addActionForFailure(new TextAction(errorLabel))
		);
		
		
		popupDesc.addDescription("positiveIntegerHelp", integerPositiveTextBox);
		
		validator.addValidators("integerInRangeMinus5000Plus5000", 
			new IntegerValidator(integerMinus5000To5000TextBox, -5000, 5000)
				.addActionForFailure(focusAction)
				.addActionForFailure(new StyleAction("validationFailedBorder"))
		);
		
		popupDesc.addDescription("integerInRangeMinus5000Plus5000Help", integerMinus5000To5000TextBox);
		
		validator.addValidators("anyInteger", 
				new IntegerValidator(integerTextBox3)
					.addActionForFailure(focusAction)
					.addActionForFailure(new StyleAction("validationFailedBorder"))
			);
		
		popupDesc.addDescription("anyIntegerHelp", integerTextBox3);
		
		
		validator.addValidators("stringLengthSmaller5",
			new StringLengthValidator(stringLengthSmaller5TextBox, 0, 4)
				.addActionForFailure(focusAction)
				.addActionForFailure(new StyleAction("validationFailedBorder"))
		);
		
		popupDesc.addDescription("stringLengthSmaller5Help", stringLengthSmaller5TextBox);
		
		
		
		validator.addValidators("stringLengthBetween2And5",
				new StringLengthValidator(stringLengthBetween2And5TextBox, 2, 5)
					.addActionForFailure(focusAction)
					.addActionForFailure(new StyleAction("validationFailedBorder"))
		);
		
		popupDesc.addDescription("stringLengthBetween2And5Help", stringLengthBetween2And5TextBox);
		
		validator.addValidators("notEmpty",
				new NotEmptyValidator(notEmptyTextBox)
					.addActionForFailure(focusAction)
					.addActionForFailure(new StyleAction("validationFailedBorder"))
		);
		
		popupDesc.addDescription("notEmptyHelp", notEmptyTextBox);
		
		RegularExpressionValidator regex = new RegularExpressionValidator(regexValidateEntryTextBox, new ValidatorConfigurationSource() {

			/* 
			*  Use of a dynamically configured RegularExpressionValidator.
			*
			*  Normally you would only have to pass the regex string "(a|b)*" in this
			*  case into the constructor. But if you want dynamic setting of the
			*  regular expression you need to provide an implementation for this
			*  interface
			*
			*/
			public String getConfigurationValue() {
				String regex = regexEntryTextBox.getText();
				return regex;
			}
			
		}, "regexNotMatched");
		
		validator.addValidators("enterRegExedText", regex
			.addActionForFailure(new StyleAction("validationFailedBorder"))
			.addActionForFailure(focusAction)
		);
		
		popupDesc.addDescription("regexText.description", regexValidateEntryTextBox);
		
		validator.addGlobalAction(new DisclosureTextAction(allErrorsPanel, "redText") );
		
		
		transValidator = new ValidationProcessor();
		transValidator.addValidators("string1", new UpperCaseTransformer(uppercaseTextBox));
		transValidator.addValidators("string2", new TrimmedUpperCaseTransformer(trimmedUppercaseTextBox));
		transValidator.addValidators("caesar1", new CaesarEncryptionTransformer(caesarTextBox, 1));
		
	}
	
}
		
		

Code for the multi field validations:

			
		PopupDescription description = new PopupDescription(new ShowcaseValidationMessages());
		
		description.addDescription("password.description", pass1);
		description.addDescription("password.description", pass2);
		
		description.addDescription("multiEquals.description", name1);
		description.addDescription("multiEquals.description", name2);
		description.addDescription("multiEquals.description", name3);
		
		validator.addValidators("passwords", new MultiStringsEqualsValidator(pass1, pass2)
			.addActionForFailure(new StyleAction("validationFailedBorder"))
			.addActionForFailure(focusAction)
			, new MultiStringLengthValidator(6, 15, pass1, pass2)
			.addActionForFailure(new StyleAction("validationFailedBorder"))
			.addActionForFailure(focusAction)
		);
		
		
		validator.addValidators("names", new MultiStringsEqualsValidator(name1, name2, name3)
			.addActionForFailure(new StyleAction("validationFailedBorder"))
			.addActionForFailure(focusAction)
		);