Reflection

[Peter]

Hello fellow Kawa programmers!

I'm trying to reflect on Classes, however, I'm running into some

("foo":getClass)

class java.lang.String

(("foo":getClass):getCanonicalName)

; Evaluation aborted on java.lang.RuntimeException: no applicable method named `getCanonicalName' in java.lang.String.

(java.lang.String:getCanonicalName)

; Evaluation aborted on java.lang.RuntimeException: no such field getCanonicalName in java.lang.String.

(<java.lang.String>:getCanonicalName)

; Evaluation aborted on java.lang.RuntimeException: no such field getCanonicalName in java.lang.String.


How do I correctly use reflection (for finding methods and fields etc.)?

Thanks for any help!

Peter

[Per Bothner]

Post by Peter
I'm trying to reflect on Classes, however, I'm running into some

("foo":getClass)

class java.lang.String

(("foo":getClass):getCanonicalName)

; Evaluation aborted on java.lang.RuntimeException: no applicable method named `getCanonicalName' in java.lang.String.

(java.lang.String:getCanonicalName)

; Evaluation aborted on java.lang.RuntimeException: no such field getCanonicalName in java.lang.String.

(<java.lang.String>:getCanonicalName)

; Evaluation aborted on java.lang.RuntimeException: no such field getCanonicalName in java.lang.String.

This is explained in
https://www.gnu.org/software/kawa/Colon-notation.html

However, that doesn't say what to do instead. (I'm adding a note for that.)

Basically, if the "receiver" (this) argument is a Class then you can't use
colon notation, but you can use the invoke procedure:

(invoke ("foo":getClass) 'getCanonicalName)

[Jamison Hope]

Post by Per Bothner

Post by Peter
I'm trying to reflect on Classes, however, I'm running into some

("foo":getClass)

class java.lang.String

(("foo":getClass):getCanonicalName)

; Evaluation aborted on java.lang.RuntimeException: no applicable method
named `getCanonicalName' in java.lang.String.

(java.lang.String:getCanonicalName)

; Evaluation aborted on java.lang.RuntimeException: no such field
getCanonicalName in java.lang.String.

(<java.lang.String>:getCanonicalName)

; Evaluation aborted on java.lang.RuntimeException: no such field
getCanonicalName in java.lang.String.

This is explained in
https://www.gnu.org/software/kawa/Colon-notation.html
However, that doesn't say what to do instead. (I'm adding a note for that.)
Basically, if the "receiver" (this) argument is a Class then you can't use
(invoke ("foo":getClass) 'getCanonicalName)

Using "*:" notation works, too:

(*:getCanonicalName ("foo":getClass))

[Peter]

Post by Jamison Hope

Post by Per Bothner
This is explained in
https://www.gnu.org/software/kawa/Colon-notation.html

Ah, sorry for missing this ;-/

Post by Jamison Hope
(*:getCanonicalName ("foo":getClass))

That'll do perfectly ;) Thanks to both of you for the help!

Greetings, Peter