/* 
 * Copyright (c) 2006 Stiftung Deutsches Elektronen-Synchroton, 
 * Member of the Helmholtz Association, (DESY), HAMBURG, GERMANY.
 *
 * THIS SOFTWARE IS PROVIDED UNDER THIS LICENSE ON AN "../AS IS" BASIS. 
 * WITHOUT WARRANTY OF ANY KIND, EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED 
 * TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR PARTICULAR PURPOSE AND 
 * NON-INFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE 
 * FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR 
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. SHOULD THE SOFTWARE PROVE DEFECTIVE 
 * IN ANY RESPECT, THE USER ASSUMES THE COST OF ANY NECESSARY SERVICING, REPAIR OR 
 * CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS LICENSE. 
 * NO USE OF ANY SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER THIS DISCLAIMER.
 * DESY HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, 
 * OR MODIFICATIONS.
 * THE FULL LICENSE SPECIFYING FOR THE SOFTWARE THE REDISTRIBUTION, MODIFICATION, 
 * USAGE AND OTHER RIGHTS AND OBLIGATIONS IS INCLUDED WITH THE DISTRIBUTION OF THIS 
 * PROJECT IN THE FILE LICENSE.HTML. IF THE LICENSE IS NOT INCLUDED YOU MAY FIND A COPY 
 * AT HTTP://WWW.DESY.DE/LEGAL/LICENSE.HTM
 */
package org.csstudio.sds.ui.properties;

import org.csstudio.sds.model.WidgetProperty;
import org.eclipse.jface.viewers.ICellEditorValidator;

/**
 * This class wraps <code>PropertyValidator</code> with a cell editor validator. It can validate all 
 * cell editor values that are of types defined in <code>PropertyTypesEnum</code> or that can be converted 
 * into these types.
 * 
 * @author Sven Wende
 * 
 */
public final class PropertyTypeCellEditorValidator implements
		ICellEditorValidator {
	/**
	 * The expected property type.
	 */
	private WidgetProperty _property;

	/**
	 * Constructor.
	 * 
	 * @param propertyType
	 *            the expected property type
	 */
	public PropertyTypeCellEditorValidator(final WidgetProperty propertyType) {
		_property = propertyType;
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public String isValid(final Object value) {
		String error = null;
		
		if(value!=null) {
			if(_property.checkValue(value)==null) {
				error = "Value [" + value + "] cannot not be applied to cell.";
			}
		}

		return error;
	}
}