How do I reference a nested type in SpEL?

Question

Given a class containing an enum:

public class MyClass {
    public enum NestedEnum {        
        value1(1),
        value2(2);

        private int code;

        private NestedEnum(int code) {
            this.code = code;
        }

        public int getCode() {
            return code;
        }
    }
}

how do I reference NestedEnum? This:

#{T(MyClass.NestedEnum).value1.getCode()}

results in the exception:

org.springframework.expression.spel.SpelEvaluationException: EL1005E:(pos 0): Type cannot be found 'namespace.MyClass.NestedEnum'

This:

#{T(T(MyClass).NestedEnum).value1.getCode()}

results in the exception:

org.springframework.expression.spel.SpelParseException: EL1043E:(pos 3): Unexpected token.  Expected 'rparen())' but was 'lparen(()'

I cannot think of any other good options to try.

micfra · Accepted Answer · 2012-03-29 17:38:24Z

25

You have to separate the enum using a $ sign:

#{T(MyClass$NestedEnum).value1.getCode()}

answered Mar 29, 2012 at 17:38

micfra

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2 Comments

sarnold Over a year ago

Would it be better to specify the Type->NestedEnum change in your answer, instead? Oftentimes 'wrong' code in questions should be left alone, so that the fix in an answer can be more obvious.

micfra Over a year ago

This would have been a solution too, but I assume it would have impair the understandability of the answer. I also assume, it was a copy&paste error of the questioner.Neverteheless, thanks for your hint.

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