<Composite xmlns="http://www.eclipse.org/xwt/presentation"
    xmlns:x="http://www.eclipse.org/xwt"
    xmlns:j="clr-namespace:test"
    DataContext="{StaticResource myCompany}">

	<Composite.layout>
		<GridLayout numColumns="2"/>
	</Composite.layout>

	<Composite.Resources>
		<j:Company x:Key="myCompany">
			<j:Company.employees>
				<x:Array Type="j:Employee">
					<j:Employee Name="Thomas" Age="32"/>
					<j:Employee Name="Jin" Age="27"/>
				</x:Array>
			</j:Company.employees>
		</j:Company>
	</Composite.Resources>

	<TableViewer x:style="MULTI | FULL_SELECTION | BORDER" Name="TableViewer" input="{Binding Path=employees}">
		<TableViewer.multiSelection>
			<Binding path="selectedEmployees" updateSourceTrigger="PropertyChanged">
				<Binding.validationRules>
					<j:TestValidationRule/>
				</Binding.validationRules>
				
				<Binding.converter>
					<j:TestConverter/>
				</Binding.converter>		
			</Binding>
		</TableViewer.multiSelection>
		
		<TableViewer.columns>
			<TableViewerColumn width="150" text="Name" bindingPath="name"/>
			<TableViewerColumn width="150" text="Age" bindingPath="age"/>
		</TableViewer.columns>
		
		<TableViewer.control.layoutData>
			<GridData horizontalAlignment="FILL"
         		grabExcessHorizontalSpace="true"/>
		</TableViewer.control.layoutData>
		
		<TableViewer.table headervisible="true" linesvisible="true"/>
	</TableViewer>

</Composite> 

package test;

import org.eclipse.core.databinding.validation.ValidationStatus;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.e4.xwt.IValidationRule;

public class TestValidationRule implements IValidationRule {

	public TestValidationRule() {
		System.out.println("Created ValidationRule");
	}
	
	public IStatus validate(Object value) {
		System.out.println("Validation");
		return ValidationStatus.ok();
	}

	public Direction getBindingMode() {
		return Direction.Both;
	}

	public Phase getPhase() {
		return Phase.AfterConvert;
	}

	public IStatus validateBack(Object value) {
		System.out.println("Validation back");
		return ValidationStatus.ok();
	}

}

package test;

import org.eclipse.e4.xwt.IValueConverter;

public class TestConverter implements IValueConverter{

	public TestConverter() {
		System.out.println("Created TestConverter");
	}
	
	public Object getFromType() {
		return Object.class;
	}

	public Object getToType() {
		return Employee.class;
	}

	public Object convert(Object fromObject) {
		System.out.println("Converting");
		return fromObject;
	}

	public Object convertBack(Object value) {
		System.out.println("Converting back");
		return value;
	}

}

package test;
/*******************************************************************************
 * Copyright (c) 2006, 2010 Soyatec (http://www.soyatec.com) 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:
 *     Soyatec - initial API and implementation
 *******************************************************************************/

public class Company {
	protected Employee[] employees;
	protected Employee[] selectedEmployees;

	public Company() {
	}

	public Employee[] getEmployees() {
		return employees;
	}

	public void setEmployees(Employee[] employees) {
		this.employees = employees;
	}

	public Employee[] getSelectedEmployees() {
		System.out.println("Get selected employees "+getSelectedEmployeesSize());
		return selectedEmployees;
	}

	private int getSelectedEmployeesSize() {
		int size = 0;
		if(selectedEmployees != null) {
			size = selectedEmployees.length;
		}
		return size;
	}

	public void setSelectedEmployees(Employee[] selectedEmployees) {
		this.selectedEmployees = selectedEmployees;
		System.out.println("Set selected employees "+getSelectedEmployeesSize());
	}
	
	
}
 

<TableViewer.table selectionEvent="yourHandlerMethod"/>