CoreMidi4JUtilities.cpp

Go to the documentation of this file.

#include "CoreMidi4JUtilities.h"

/*
 * Helper function for throwing exceptions to Java
 *
 * @param env        The JNI environment
 * @param function   The name of the function that caused the error
 * @param status     The status code  which provides details about the error
 *
 */

void ThrowException(JNIEnv *env, CFStringRef function, OSStatus status) {

  CFMutableStringRef string = CFStringCreateMutable(NULL, 0);

  // Create the exception string
  if (string) {

    CFStringAppend(string, CFSTR("Exception in CoreMIDI JNI Library by \""));
    CFStringAppend(string, function);
    CFStringAppend(string, CFSTR("\" - OS STatus Code: "));
    CFStringAppend(string, CFStringCreateWithFormat(NULL, NULL, CFSTR("%8.8x"), status));

  }

  jclass Exception = env->FindClass("uk/co/xfactorylibrarians/coremidi4j/CoreMidiException");
  env->ThrowNew(Exception,CFStringGetCStringPtr(CFStringCreateCopy(NULL, string), kCFStringEncodingMacRoman ));

}

/*
 * Helper function that prints out JNI Status Codes
 *
 * @param status        The status value to print
 *
 */

void printJniStatus(int status) {

  switch (status) {

    case JNI_OK:
      std::cout << "JNI_OK - success";
      break;

    case JNI_ERR:
      std::cout << "JNI_ERR - unknown error";
      break;

    case JNI_EDETACHED:
      std::cout << "JNI_EDETACHED - thread detached from the VM";
      break;

    case JNI_EVERSION:
      std::cout << "JNI_EVERSION - JNI version error";
      break;

    case JNI_ENOMEM:
      std::cout << "JNI_ENOMEM - not enough memory";
      break;

    case JNI_EEXIST:
      std::cout << "JNI_EEXIST - VM already created";
      break;

    case JNI_EINVAL:
      std::cout << "JNI_EINVAL - invalid arguments";
      break;

    default:
      std::cout << "!! Undefined Error Code";
      break;

  }

  std::cout << std::endl;

}

---