1 /*******************************************************************************
2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
4 * All rights reserved. This program and the accompanying materials
5 * are made available under the terms of the Eclipse Public License v1.0
6 * which accompanies this distribution, and is available at
7 * http://www.eclipse.org/legal/epl-v10.html
10 * VTT Technical Research Centre of Finland - initial API and implementation
11 *******************************************************************************/
12 package org.simantics.utils.ui.validators;
14 import org.eclipse.jface.dialogs.IInputValidator;
17 * A JFace input validator for non-negative integers, i.e. natural numbers.
19 * @author Tuukka Lehtonen
21 public class NonNegativeIntegerValidator implements IInputValidator {
24 * Validates an input string as a non-negative integer (Natural number).
25 * @see org.eclipse.jface.dialogs.IInputValidator#isValid(java.lang.String)
27 public String isValid(String newText) {
29 int value = Integer.parseInt(newText);
31 return "\"" + newText + "\" is not a non-negative integer value";
34 } catch (NumberFormatException e) {
35 return "\"" + newText + "\" is not an integer value";