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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2006 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module dwtx.jface.viewers.ICellEditorValidator;
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14
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15 import dwt.dwthelper.utils;
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16
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17 /**
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18 * An interface for validating a cell editor's input.
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19 * <p>
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20 * This interface should be implemented by classes that wish to
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21 * act as cell editor validators.
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22 * </p>
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23 */
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24 public interface ICellEditorValidator {
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25 /**
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26 * Returns a string indicating whether the given value is valid;
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27 * <code>null</code> means valid, and non-<code>null</code> means
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28 * invalid, with the result being the error message to display
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29 * to the end user.
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30 * <p>
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31 * It is the responsibility of the implementor to fully format the
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32 * message before returning it.
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33 * </p>
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34 *
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35 * @param value the value to be validated
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36 * @return the error message, or <code>null</code> indicating
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37 * that the value is valid
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38 */
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39 public String isValid(Object value);
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40 }
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