Zkにおけるフォーム検証の実装

/**
	 *                  
	 * <p>
	 * 
	 * 
	 * @param parent
	 *                   
	 * @param inputs
	 */
	private static void searchInputs(Component parent, List<InputElement> inputs) {
		if (parent instanceof InputElement) {
			inputs.add((InputElement) parent);
			return;
		}
		List<Component> children = (List<Component>) parent.getChildren();
		if (children == null || children.size() < 1)
			return;
		for (Component c : children) {
			searchInputs(c, inputs);
		}
	}

	/**
	 *             
	 * <p>
	 * {@link InputElement}         true,   Bandbox, Combobox, Datebox,
	 * Decimalbox, Doublebox, FormatInputElement, Intbox, Longbox,
	 * NumberInputElement, Spinner, Textbox, Timebox
	 * 
	 * @param comp
	 * @return
	 */
	public static boolean isInputElement(Component comp) {
		return comp instanceof InputElement;
	}

	/**
	 *           
	 * <p>
	 *   {@link InputElement#setConstraint(String)}
	 *                      constraint      ，          ，  &lt;textbox
	 * constraint="no empty"/&gt;constraint  
	 * <p>
	 *               ，             
	 * 
	 * @param form
	 *                       
	 * 
	 * @param showError
	 * 
	 * @return       true，      false
	 */
	public static boolean isValidForm(Component form, boolean showError) {
		if (form == null) {
			return true;
		}
		List<InputElement> inputs = new ArrayList<InputElement>();
		searchInputs(form, inputs);
		boolean valid = true;
		for (InputElement elem : inputs) {
			if (!elem.isValid()) {
				if (showError) {
					elem.getText();
				}
				valid = false;
			}
		}
		return valid;
	}

	/**
	 * 
	 *           
	 * <p>
	 *   {@link InputElement#setConstraint(String)}
	 *                      constraint      ，          ，  &lt;textbox
	 * constraint="no empty"/&gt;constraint  
	 * <p>
	 *               ，             
	 * 
	 * @param form
	 *                       
	 * 
	 * @return       true，      false
	 */
	public static boolean isValidForm(Component form) {
		if (form == null) {
			return true;
		}
		List<InputElement> inputs = new ArrayList<InputElement>();
		searchInputs(form, inputs);
		boolean valid = true;
		for (InputElement elem : inputs) {
			if (!elem.isValid()) {
				elem.getText();
				valid = false;
			}
		}
		return valid;
	}