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