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.application.arguments;
14 public interface IArgumentValidator<T> {
17 * Validates the given argument. Returns an error message to display if the
18 * new text is invalid. Returns <code>null</code> if there is no error.
19 * Note that the empty string is not treated the same as <code>null</code>;
20 * it indicates an error state but with no message to display.
22 * @param newText the text to check for validity
24 * @return an error message or <code>null</code> if no error
26 public String isValid(T newText);