Returning String data through argument

Question

I need to write a method to call the following method:
int myFunc(char *buf, int code);
Where I need the return value integer and I also want to get back the char * as a string.
I am thinking the most straightforward thing to do would be:
public native int myFunc(StringBuffer sb, int code);
and then in my native code create the return string and use the MethodID functions to call the StringBuffers append() method.
I considered making two functions - one to get the string and one to check for an error, but figured that could cause threading implications in the future.
I assume this is a common issue, is there a recommended solution?
Thanks,
mike

Answer 1

Sorry I didn't reply earlier- never really came back to this thread - the solution I suggested in my first message worked great for me.
Here's what it looks like (the relevant bits at least):
* Class: com_nmss_ms_log_hsLogger
* Method: lgGetText
* Signature: (Ljava/lang/StringBuffer;Ljava/lang/String;I)I
JNIEXPORT jint JNICALL Java_com_nmss_ms_log_hsLogger_lgGetText
(JNIEnv *env, jobject obj, jobject stringBuf, jstring id, jint msgId, jchar ss_id)
char buff[501];
int result, i;
jstring retString;
jclass cls = (*env)->GetObjectClass(env, stringBuf);
jmethodID mid = (*env)->GetMethodID(env, cls, "append", "(Ljava/lang/String;)Ljava/lang/StringBuffer;");
result = logGetText(log_handle, msgId, buff, 500);
retString = (*env)->NewStringUTF(env, buff);
(*env)->CallObjectMethod(env, stringBuf, mid, retString);
return result;
}