/*******************************************************************************
* Copyright (c) 2000, 2015 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jface.dialogs;
/**
* The IInputValidator is the interface for simple validators.
* @see org.eclipse.jface.dialogs.InputDialog
*/
public interface IInputValidator {
/**
* Validates the given string. Returns an error message to display
* if the new text is invalid. Returns <code>null</code> if there
* is no error. Note that the empty string is not treated the same
* as <code>null</code>; it indicates an error state but with no message
* to display.
*
* @param newText the text to check for validity
*
* @return an error message or <code>null</code> if no error
*/
public String isValid(String newText);
}