How to create NewObject in JNI for different methods?

[Vinney Shanmugam]

I have done it with constructors, where i use to populate the values and add those values to the new object created. This can be retirved on the java side.

Say, if i have empty constructor and have setter methods(say, 4 methods), whose value will be filled in the native side and i have to create a object out of all these setter methods(say, 4 methods).

code below is for constructor.... how to create object using four different methods................

 if(scInfo_class == NULL) {
     scReplyClass = (*env)->FindClass(env, SCINFO_CLASSNAME);

     if(scReplyClass == NULL){
        printf("Unable to find the class %s.", SCINFO_CLASSNAME);
        return NULL;
     }
     scInfo_class = (*env)->NewGlobalRef(env, scReplyClass);

     if(scInfo_class == NULL){
        printf("Unable to create GlobalRef for class %s.",
        		SCINFO_CLASSNAME);
        return NULL;
     }
  }

  if(scInfo_constructor == NULL){
	  scInfo_constructor = (*env)->GetMethodID(env, scInfo_class,
           "<init>", "(IIII;)V");
     if(scInfo_constructor == NULL){
        printf("Unable to find the constructor in class ");
        return NULL;
     }
  }

  scObject = (*env)->NewObject(env, scInfo_class, scInfo_constructor,a,b,c,d);
  return scObject;

[Rob Spoor]

The constructor is the same, except the signature is different and there are less parameters to the NewObject call.

The setter methods all need to be retrieved afterwards using GetMethodID and CallVoidMethod.

[Vinney Shanmugam]

Can you give me a sample code of it please.... because, as of now i am populating the values in constructor and also NewObject is taking constrcutor as a parameter, which we are finding using GetMethodID. In case we have two setter methods, they ll ve different jmehtodID. How can i pass these two in NewObject? I am confused only at this point... Please clear me the air....

Thanks a lot for the reply.........

[Rob Spoor]

I'm ignoring any possible errors here for simplicity:

scReplyClass = (*env)->FindClass(env, SCINFO_CLASSNAME);
scInfo_class = (*env)->NewGlobalRef(env, scReplyClass);   
scInfo_constructor = (*env)->GetMethodID(env, scInfo_class, "<init>", "()V"); // no parameters
scObject = (*env)->NewObject(env, scInfo_class, scInfo_constructor);   

scMethod1 = (*env)->GetMethodID(env, scInfo_class, "setValue1", "(I)V");
(*env)->CallVoidMethod(env, scObject, scMethod1, a);
// repeat for others

return scObject;

[Vinney Shanmugam]

Thanks a ton Rob.

It not only helped me to solve my problem but also to understand how to do it. I wont forget this in my lifetime.

A BIG THANKS.