allwpilib/wpimath/src/main/native/cpp/jni/WPIMathJNI_Exceptions.cpp

// Copyright (c) FIRST and other WPILib contributors.
// Open Source Software; you can modify and/or share it under the terms of
// the WPILib BSD license file in the root directory of this project.

#include "WPIMathJNI_Exceptions.h"

#include <jni.h>

using namespace wpi::java;

//
// Globals and load/unload
//

JException illegalArgEx;
JException ioEx;
JException trajectorySerializationEx;

static const JExceptionInit exceptions[] = {
    {"java/lang/IllegalArgumentException", &illegalArgEx},
    {"java/io/IOException", &ioEx},
    {"edu/wpi/first/math/trajectory/"
     "TrajectoryUtil$TrajectorySerializationException",
     &trajectorySerializationEx}};

extern "C" {

JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM* vm, void* reserved) {
  JNIEnv* env;
  if (vm->GetEnv(reinterpret_cast<void**>(&env), JNI_VERSION_1_6) != JNI_OK) {
    return JNI_ERR;
  }

  // Cache references to exceptions
  for (auto& c : exceptions) {
    *c.cls = JException(env, c.name);
    if (!*c.cls) {
      return JNI_ERR;
    }
  }

  return JNI_VERSION_1_6;
}

JNIEXPORT void JNICALL JNI_OnUnload(JavaVM* vm, void* reserved) {
  JNIEnv* env;
  if (vm->GetEnv(reinterpret_cast<void**>(&env), JNI_VERSION_1_6) != JNI_OK) {
    return;
  }
  // Delete global references
  for (auto& c : exceptions) {
    c.cls->free(env);
  }
}

}  // extern "C"