CellModifier.java

/***********************************************************************
 * Copyright (c) 2007 Anyware Technologies
 * 
 * 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:
 *    Anyware Technologies - initial API and implementation
 * 
 * $Id: CellModifier.java,v 1.1 2008/05/26 12:25:14 jlescot Exp $
 **********************************************************************/

package org.eclipse.emf.ecoretools.tabbedproperties.internal.sections.listeners;

import java.math.BigInteger;

import org.eclipse.emf.common.util.AbstractEnumerator;
import org.eclipse.emf.ecoretools.tabbedproperties.sections.widgets.TableViewerComposite;
import org.eclipse.jface.viewers.ICellModifier;
import org.eclipse.swt.widgets.TableItem;

/**
 * This class implements an ICellModifier An ICellModifier is called when the
 * user modifies a cell in the tableViewer
 * 
 * @author Alfredo Serrano
 */

public class CellModifier implements ICellModifier {

	private TableViewerComposite tableViewer;

	/**
	 * Constructor
	 * 
	 * @param tableViewer
	 *            an instance of a TableViewerExample
	 */
	public CellModifier(TableViewerComposite tableViewer) {
		this.tableViewer = tableViewer;
	}

	/**
	 * @see org.eclipse.jface.viewers.ICellModifier#canModify(java.lang.Object,
	 *      java.lang.String)
	 */
	public boolean canModify(Object element, String property) {
		return true;
	}

	/**
	 * @see org.eclipse.jface.viewers.ICellModifier#getValue(java.lang.Object,
	 *      java.lang.String)
	 */
	public Object getValue(Object element, String property) {
		if (element instanceof String) {
			return element;
		} else if (element instanceof Integer) {
			return ((Integer) element).toString();
		} else if (element instanceof BigInteger) {
			return ((BigInteger) element).toString();
		} else if (element instanceof AbstractEnumerator) {
			String stringValue = ((AbstractEnumerator) element).getLiteral();
			String[] choices = tableViewer.getObjectManager().getEnumLiterals();
			int i = choices.length - 1;
			while (!stringValue.equals(choices[i]) && i > 0) {
				--i;
			}
			return new Integer(i);
		}
		return element;
	}

	/**
	 * @see org.eclipse.jface.viewers.ICellModifier#modify(java.lang.Object,
	 *      java.lang.String, java.lang.Object)
	 */
	public void modify(Object element, String property, Object value) {
		// Find the index of the column
		TableItem item = (TableItem) element;
		Object oldValue = item.getData();
		Object newValue = null;

		if (oldValue instanceof String) {
			String string = (String) value;
			newValue = string.trim();
			item.setText((String) newValue);
			item.setData(newValue);
		} else if (oldValue instanceof Integer) {
			int i = Integer.parseInt((String) value);
			newValue = new Integer(i);
			item.setText(i + ""); //$NON-NLS-1$
			item.setData(newValue);
		} else if (oldValue instanceof BigInteger) {
			newValue = new BigInteger((String) value);
			item.setText(newValue.toString());
			item.setData(newValue);
		} else if (oldValue instanceof Double) {
			newValue = new Double((String) value);
			item.setText(newValue.toString());
			item.setData(newValue);
		} else if (oldValue instanceof Boolean) {
			newValue = value; // Boolean has not real interest
		} else {
			newValue = tableViewer.getObjectManager().createEnum(((Integer) value).intValue());
			// TODO something with enums. This is not going to work because we
			// have to create an instance of the
			// enumeration
		}
		tableViewer.getObjectManager().elementChanged(oldValue, newValue);
	}
}