Bug 140620 Chart scripting errors are ignored
Write a chart with an invalid script, the execution simply ignores the script. This makes it difficult to debug scripting. The error message is also not precise and needs improvements.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/model/component/util/ComponentSwitch.java
* <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @generated
	 */
	public ComponentSwitch( )
	{
		if ( modelPackage == null )
		{
			modelPackage = ComponentPackage.eINSTANCE;
		}
	}
	/**
	 * Calls <code>caseXXX</code> for each class of the model until one returns a non null result; it yields that result.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @return the first non-null result returned by a <code>caseXXX</code> call.
	 * @generated
	 */
	public Object doSwitch( EObject theEObject )
	{
		return doSwitch( theEObject.eClass( ), theEObject );
	}
	/**
	 * Calls <code>caseXXX</code> for each class of the model until one returns a non null result; it yields that result.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @return the first non-null result returned by a <code>caseXXX</code> call.
	 * @generated
	 */
	protected Object doSwitch( EClass theEClass, EObject theEObject )
	{
		if ( theEClass.eContainer( ) == modelPackage )
		{