Bug 202254 Exception is thrown when category values are null and type of X axis is set to DateTime
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/model/data/util/DataAdapterFactory.java
{
			return createStockDataSetAdapter( );
		}
		public Object caseTextDataSet( TextDataSet object )
		{
			return createTextDataSetAdapter( );
		}
		public Object caseTrigger( Trigger object )
		{
			return createTriggerAdapter( );
		}
		public Object defaultCase( EObject object )
		{
			return createEObjectAdapter( );
		}
	};
	/**
	 * Creates an adapter for the <code>target</code>.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @param target the object to adapt.
	 * @return the adapter for the <code>target</code>.
	 * @generated
	 */
	public Adapter createAdapter( Notifier target )
	{
		return (Adapter) modelSwitch.doSwitch( (EObject) target );
	}
	/**
	 * Creates a new adapter for an object of class '{@link org.eclipse.birt.chart.model.data.Action <em>Action</em>}'.
	 * <!-- begin-user-doc --> This default implementation returns null so that we can easily ignore cases; it's useful