Re: clojure struct with java

[Diego Pacheco]

You Right! BUT still does not work.

I tried:

                    Var type       =  RT.var("clojure.core","type");
                    Object oType   = type.invoke("employee");

                    Var struct     =  RT.var("clojure.core", "struct-map");
                    Object oStruct =  
struct.invoke(oType,"Diego",26,"Coach",1000);

                    Var hire = RT.var("user", "hire");
                    Object r = hire.invoke(oStruct);
                    System.out.println(r);

......

I got the exception:

java.lang.ClassCastException: java.lang.Class cannot be cast to
clojure.lang.PersistentStructMap$Def
        at clojure.core$struct_map.doInvoke(core.clj:3128)
        at clojure.lang.RestFn.invoke(RestFn.java:486)
        at clojure.lang.Var.invoke(Var.java:381)
        at
com.github.diegopacheco.sandbox.java.clojure.JavaCallsClojureInterpreted.main(JavaCallsClojureInterpreted.java:
42)


.............


When I do:

                    Var struct =  RT.var("clojure.core", "create-
struct");
                    Object oStruct =  
struct.invoke("employee","Diego",26,"Coach",
1000);

                    Var hire = RT.var("user", "hire");
                    Object r = hire.invoke(oStruct);
                    System.out.println(r);

                    Var printee = RT.var("user", "print-employee");
                    Object r2 = printee.invoke(oStruct);
                    System.out.println(r2);

                    Var print = RT.var("user", "print-employees");
                    Object result = print.invoke();
                    System.out.println(result);


............

I GOT:

[#<Def clojure.lang.PersistentStructMap$Def@6b6ac8>]
"Name:  - Age:  - Role:  - Salary:"
null
"Name:  - Age:  - Role:  - Salary:"
clojure.lang.LazySeq@1f

...........

When I DO:

    Var struct     =  RT.var("clojure.core", "create-struct");
                    Object oStruct =  
struct.invoke("employee","Diego",26,"Coach",
1000);

                    Var employee     =  RT.var("clojure.core", "struct");
                    Object oEmployee =  employee.invoke(oStruct);

                    Var hire = RT.var("user", "hire");
                    Object r = hire.invoke(oEmployee);
                    System.out.println(r);

                    Var printee = RT.var("user", "print-employee");
                    Object r2 = printee.invoke(oEmployee);
                    System.out.println(r2);

                    Var print = RT.var("user", "print-employees");
                    Object result = print.invoke();
                    System.out.println(result);

.......


I Got:

[{"employee" nil, "Diego" nil, 26 nil, "Coach" nil, 1000 nil}]
"Name:  - Age:  - Role:  - Salary:"
null
"Name:  - Age:  - Role:  - Salary:"
clojure.lang.LazySeq@1f


I'm loosing my hope, does anybody used this feature before ? Any idea
what I'm doing wrong ?

Cheers,
@diego_pacheco


On Oct 14, 3:58 am, Alexander Taggart <m...@ataggart.ca> wrote:
> I suspect this...
>
> Var struct = RT.var("clojure.core", "struct","employee :diego 10 :coach
> 1000");
>
> isn't doing what you think it will.  That will set the root binding of
> clojure.core/struct to the string you gave it.  you probably want to get the
> var for the struct function, and then invoke it with the arguments to create
> an employee struct instance.

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