Using Enum constant in request header spring boot

Question

I have a spring boot application and want to use an Enum constant to specify the value as shown below, however, the compiler generates an error "Type mismatch: cannot convert from Constants to String" Here is the code block

@RequestMapping(method= RequestMethod.POST, value="/user")
public User createUser(@RequestBody User user,
        @RequestHeader(value= Constants.HEADER_USER_AGENT) String userAgent
)

I know I can use public static String instead of Enum, but I wonder if it is possible to use Enum constants?

This is answered in https://stackoverflow.com/questions/13253624/how-to-supply-enum-value-to-an-annotation-from-a-constant-in-java — Chanandler Bong, Nov 21 '19 at 10:58

score 0 · Answer 1 · answered Mar 20 '19 at 21:15

0

What about

Constants.HEADER_USER_AGENT.toString()

For example? Keep in mind: an enum is not a string, but can be converted into one!

answered Mar 20 '19 at 21:15

GhostCat

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tried that too, i was getting "The value for annotation attribute RequestHeader.value must be a constant expression" compiler error – user3310917 Mar 20 '19 at 21:50

score 0 · Answer 2 · answered Nov 19 '20 at 14:04

0

For example, in your controller.

@GetMapping
public void myEndpoint(@RequestHeader("X-My-Header") EMyEnum myEnum) {
    // ...
}

Example of header request:

X-My-Header: MY_ENUM_VALUE

answered Nov 19 '20 at 14:04

Gustavo Dias

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Using Enum constant in request header spring boot

2 Answers2