code: public Object getValue(String expression, Class<?> expectedType) {
          ValueExpression exp = factory.createValueExpression(
                                    elManager.getELContext(),
                                    bracket(expression), expectedType);
          return exp.getValue(elManager.getELContext());
      }
docs: Evaluates an EL expression, and coerces the result to the specified type.
  @param expression The EL expression to be evaluated.
  @param expectedType Specifies the type that the resultant evaluation
  will be coerced to.
  @return The result of the expression evaluation.