IntegerCellEditor.java example

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gda-dal-master
/* 
 * Copyright (c) 2008 Stiftung Deutsches Elektronen-Synchrotron, 
 * 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.internal.properties;

import org.eclipse.jface.viewers.TextCellEditor;
import org.eclipse.swt.widgets.Composite;

/**
 * A cell editor that manages a <code>java.lang.Integer</code> entry field.
 * 
 * @author Alexander Will
 * @version $Revision: 1.5 $
 * 
 */
public final class IntegerCellEditor extends TextCellEditor {
	/**
	 * Standard constructor.
	 * 
	 * @param parent
	 *            The parent control.
	 */
	public IntegerCellEditor(final Composite parent) {
		super(parent);
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	protected Object doGetValue() {
		Object value = super.doGetValue();

		Integer result = 0;

		try {
			result = Integer.parseInt(value.toString());
		} catch (NumberFormatException nfe) {
			result = 0;
		}

		return result;
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	protected void doSetValue(final Object value) {
		if (value==null) {
			super.doSetValue(String.valueOf(new Integer(0)));
		} else {
			super.doSetValue(String.valueOf(value.toString()));
		}
	}
}