code: public static MethodExpression createMethodExpression(String p_expression, Class<?> returnType,
  			Class<?>... parameterTypes) {
  		FacesContext context = FacesContext.getCurrentInstance();
  		ExpressionFactory expressionFactory = context.getApplication().getExpressionFactory();
  		ELContext elContext = context.getELContext();
  
  		MethodExpression mex = expressionFactory.createMethodExpression(elContext, p_expression, returnType,
  				parameterTypes);
  		return mex;
  	}
docs: Utility method to create a JSF Method expression
  
  @param p_expression
  @param returnType
  @param parameterTypes
  @return