i using org.springframework.expression.spel.standard.spelexpressionparser parsing string expression when add sin(90) expression getting following error:
el1011e:(pos 50): method call: attempted call method sin(java.lang.integer) on null context object error.
any idea how solve this?
read spring expression language (spel) manual.
option 1: §9.5.12 functions:
you can extend spel registering user defined functions can called within expression string.
option 2: §9.5.9 types:
the special
toperator can used specify instance of java.lang.class (the type). static methods invoked using operator well.
if go option 1, can register sin() function, , expression work unchanged.
if go option 2, how expression should look:
(1.25 > 8) ? (2.3125 * t(math).sin(90) * 1.25) : (2.3125 * t(math).sin(90) * 8) 