LongWidgetBinder for GWT 2.0

/**
 * Copyright 2010 Philip Ives, Philadelphia, PA
 * You may reproduce, reuse and alter this code provided you keep this entire attribution. 
 * No warranty expressed or Implied. 
 * @author Philip Ives
 * 
 * class used to bind longs to text boxes. 
 *
 */
package com.nemt.mmsweb.client.util;
import com.google.gwt.event.dom.client.ChangeEvent;
import com.google.gwt.event.dom.client.ChangeHandler;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.event.shared.GwtEvent;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.user.client.ui.HasValue;
import com.google.gwt.user.client.ui.TextBoxBase;
import com.google.gwt.user.client.ui.Widget;


public class LongWidgetBinder extends Widget implements HasValue<Long> {
	/**
	 * Copyright 2010 Philip Ives, Philadelphia, PA
	 * You may reproduce, reuse and alter this code provided you keep this entire attribution. 
	 * No warranty expressed or Implied. 
	 * @author Philip Ives
	 * 
	 * class used to bind longs to text boxes. 
	 *
	 * example: to use :
	 *  <code>public class someView extends Composite {
	 *  @UiField TextBox someId;
	 *  private LongWidgetBinder longSomeIdBinder;
	 *  
	 *  public someView(){
	 *  longSomeIdBinder = new LongWidgetBinder(42L,someId); 
	 *  
	 */

		private Long v;
		private TextBoxBase w;
		private Boolean valueChangeHandlerInitialized = false;
		public LongWidgetBinder(Long v, TextBoxBase w) {
			super();
			this.v=v;this.w=w;
		}

		public Long getValue() {
			return Long.parseLong(this.w.getValue());
		}
		public void setValue(Long value) {
			this.w.setValue(value.toString());
			
		}
		public void setValue(Long value, boolean fireEvents) {
			this.w.setValue(value.toString(),fireEvents);
			
		}
		public HandlerRegistration addChangeHandler(ChangeHandler handler) {
			    return addDomHandler(handler, ChangeEvent.getType());
		}
		public HandlerRegistration addValueChangeHandler(
				ValueChangeHandler<Long> handler) {
			 // Initialization code
		    if (!valueChangeHandlerInitialized) {
		      valueChangeHandlerInitialized = true;
		      addChangeHandler(new ChangeHandler() {
		        public void onChange(ChangeEvent event) {
		          ValueChangeEvent.fire(LongWidgetBinder.this, getValue());
		        }
		      });
		    }
		    return addHandler(handler, ValueChangeEvent.getType());
			
		}
		@Override
		public void fireEvent(GwtEvent<?> event) {
			super.fireEvent(event);
		}

		
}