// JExceptionMsg returns the exception message as a Go error, if an exception
// occurred, or nil otherwise.
func JExceptionMsg(env Env) error {
jException := Object(uintptr(unsafe.Pointer(C.ExceptionOccurred(env.value()))))
if jException.IsNull() { // no exception
return nil
}
C.ExceptionDescribe(env.value())
C.ExceptionClear(env.value())
return GoError(env, jException)
}
// GoError converts the provided Java Exception into a Go error, converting VException into
// verror.T and all other exceptions into a Go error.
func GoError(env Env, jException Object) error {
if jException.IsNull() {
return nil
}
if IsInstanceOf(env, jException, jVExceptionClass) {
// VException: convert it into a verror.
// Note that we can't use CallStaticObjectMethod below as it may lead to
// an infinite loop.
jmid, jArgArr, freeFunc, err := setupStaticMethodCall(env, jVomUtilClass, "encode", []Sign{ObjectSign, TypeSign}, ByteArraySign, jException, jVExceptionClass)
if err != nil {
return fmt.Errorf("error converting VException: " + err.Error())
}
defer freeFunc()
dataObj := C.CallStaticObjectMethodA(env.value(), jVomUtilClass.value(), jmid, jArgArr)
if e := C.ExceptionOccurred(env.value()); e != nil {
C.ExceptionClear(env.value())
return fmt.Errorf("error converting VException: exception during VomUtil.encode()")
}
data := GoByteArray(env, Object(uintptr(unsafe.Pointer(dataObj))))
var verr error
if err := vom.Decode(data, &verr); err != nil {
return fmt.Errorf("error converting VException: " + err.Error())
}
return verr
}
// Not a VException: convert it into a Go error.
// Note that we can't use CallObjectMethod below, as it may lead to an
// infinite loop.
jmid, jArgArr, freeFunc, err := setupMethodCall(env, jException, "getMessage", nil, StringSign)
if err != nil {
return fmt.Errorf("error converting exception: " + err.Error())
}
defer freeFunc()
strObj := C.CallObjectMethodA(env.value(), jException.value(), jmid, jArgArr)
if e := C.ExceptionOccurred(env.value()); e != nil {
C.ExceptionClear(env.value())
return fmt.Errorf("error converting exception: exception during Throwable.getMessage()")
}
return errors.New(GoString(env, Object(uintptr(unsafe.Pointer(strObj)))))
}