@Override
public Object evaluate(ExpressionContext context) throws ExpressionExecutionException {
Object thisElement = null;
IEvaluationContext evaluationContext = contextProvider.get();
evaluationContext.newValue(XbaseScopeProvider.THIS, thisElement);
if (context != null) {
for (String elementName : context.getVariableNames()) {
Object instance = context.getInstance(elementName);
if (instance == null && context instanceof DynamicExpressionContext) {
instance = ((DynamicExpressionContext) context).getDynInstance(elementName);
}
if (instance != null) {
evaluationContext.newValue(QualifiedName.create(elementName), instance);
}
}
} else {
context = new ExpressionContext();
}
IEvaluationResult result =
elInterpreter.evaluate(xExpression, evaluationContext, CancelIndicator.NullImpl);
if (result.getException() != null) {
throw new ExpressionExecutionException("Boo!", result.getException());
}
return result.getResult();
}
