func (self *Environment) setDoubleField(z interface{}, static bool, name string, val float64) (err error) {
jval, field, err := self.getField(z, static, name, types.Basic(types.IntKind))
if err != nil {
return
}
if static {
C.envSetStaticDoubleField(self.env, C.valObject(jval), field.field, C.jdouble(val))
} else {
C.envSetDoubleField(self.env, C.valObject(jval), field.field, C.jdouble(val))
}
if self.ExceptionCheck() {
err = self.ExceptionOccurred()
}
return
}
func (self *Environment) setObjField(z interface{}, static bool, name string, rval types.Typed, val *Object) (err error) {
jval, field, err := self.getField(z, static, name, rval)
if err != nil {
return
}
if static {
C.envSetStaticObjectField(self.env, C.valObject(jval), field.field, val.object)
} else {
C.envSetObjectField(self.env, C.valObject(jval), field.field, val.object)
}
if self.ExceptionCheck() {
err = self.ExceptionOccurred()
}
return
}
func (self *Environment) callVoid(z interface{}, static bool, name string, params ...interface{}) (err error) {
jval, meth, args, localStack, err := self.getMethod(z, static, name, types.Basic(types.VoidKind), params...)
if err != nil {
return
}
defer blowStack(self, localStack)
if static {
C.envCallStaticVoidMethodA(self.env, C.valObject(jval), meth.method, args.Ptr())
} else {
C.envCallVoidMethodA(self.env, C.valObject(jval), meth.method, args.Ptr())
}
if self.ExceptionCheck() {
err = self.ExceptionOccurred()
}
return
}
func (self *Environment) callFloat(z interface{}, static bool, name string, params ...interface{}) (v float32, err error) {
jval, meth, args, localStack, err := self.getMethod(z, static, name, types.Basic(types.FloatKind), params...)
if err != nil {
return
}
defer blowStack(self, localStack)
var ji C.jfloat
if static {
ji = C.envCallStaticFloatMethodA(self.env, C.valObject(jval), meth.method, args.Ptr())
} else {
ji = C.envCallFloatMethodA(self.env, C.valObject(jval), meth.method, args.Ptr())
}
if self.ExceptionCheck() {
err = self.ExceptionOccurred()
}
v = float32(ji)
return
}
func (self *Environment) getShortField(z interface{}, static bool, name string) (v int16, err error) {
jval, field, err := self.getField(z, static, name, types.Basic(types.ShortKind))
if err != nil {
return
}
var oval C.jshort
if static {
oval = C.envGetStaticShortField(self.env, C.valObject(jval), field.field)
} else {
oval = C.envGetShortField(self.env, C.valObject(jval), field.field)
}
if self.ExceptionCheck() {
err = self.ExceptionOccurred()
}
if err == nil {
v = int16(oval)
}
return
}
func (self *Environment) getObjField(z interface{}, static bool, name string, rval types.Typed) (v *Object, err error) {
jval, field, err := self.getField(z, static, name, rval)
if err != nil {
return
}
var oval C.jobject
if static {
oval = C.envGetStaticObjectField(self.env, C.valObject(jval), field.field)
} else {
oval = C.envGetObjectField(self.env, C.valObject(jval), field.field)
}
if self.ExceptionCheck() {
err = self.ExceptionOccurred()
}
if err == nil {
v = &Object{oval}
}
return
}
func (self *Environment) setBoolField(z interface{}, static bool, name string, gval bool) (err error) {
jval, field, err := self.getField(z, static, name, types.Basic(types.BoolKind))
if err != nil {
return
}
val := C.jboolean(C.JNI_FALSE)
if gval {
val = C.JNI_TRUE
}
if static {
C.envSetStaticBooleanField(self.env, C.valObject(jval), field.field, val)
} else {
C.envSetBooleanField(self.env, C.valObject(jval), field.field, val)
}
if self.ExceptionCheck() {
err = self.ExceptionOccurred()
}
return
}
func (self *Environment) getDobuleField(z interface{}, static bool, name string) (v float64, err error) {
jval, field, err := self.getField(z, static, name, types.Basic(types.IntKind))
if err != nil {
return
}
var oval C.jdouble
if static {
oval = C.envGetStaticDoubleField(self.env, C.valObject(jval), field.field)
} else {
oval = C.envGetDoubleField(self.env, C.valObject(jval), field.field)
}
if self.ExceptionCheck() {
err = self.ExceptionOccurred()
}
if err == nil {
v = float64(oval)
}
return
}
func (self *Environment) callIntArray(z interface{}, static bool, name string, params ...interface{}) (v []int, err error) {
jval, meth, args, localStack, err := self.getMethod(z, static, name, types.Array{types.Basic(types.IntKind)}, params...)
if err != nil {
return
}
defer blowStack(self, localStack)
var oval C.jobject
if static {
oval = C.envCallStaticObjectMethodA(self.env, C.valObject(jval), meth.method, args.Ptr())
} else {
oval = C.envCallObjectMethodA(self.env, C.valObject(jval), meth.method, args.Ptr())
}
if oval == nil {
err = self.ExceptionOccurred()
}
if err == nil {
v = self.ToIntArray(newObject(oval))
}
return
}
func (self *Environment) callShort(z interface{}, static bool, name string, params ...interface{}) (v int16, err error) {
jval, meth, args, localStack, err := self.getMethod(z, static, name, types.Basic(types.ShortKind), params...)
if err != nil {
return
}
defer blowStack(self, localStack)
var oval C.jshort
if static {
oval = C.envCallStaticShortMethodA(self.env, C.valObject(jval), meth.method, args.Ptr())
} else {
oval = C.envCallShortMethodA(self.env, C.valObject(jval), meth.method, args.Ptr())
}
if self.ExceptionCheck() {
err = self.ExceptionOccurred()
}
if err == nil {
v = int16(oval)
}
return
}
func (self *Environment) callObj(z interface{}, static bool, name string, rval types.Typed, params ...interface{}) (vObj *Object, err error) {
jval, meth, args, localStack, err := self.getMethod(z, static, name, rval, params...)
if err != nil {
return
}
defer blowStack(self, localStack)
var oval C.jobject
if static {
oval = C.envCallStaticObjectMethodA(self.env, C.valObject(jval), meth.method, args.Ptr())
} else {
oval = C.envCallObjectMethodA(self.env, C.valObject(jval), meth.method, args.Ptr())
}
if self.ExceptionCheck() {
err = self.ExceptionOccurred()
}
if err == nil {
vObj = newObject(oval)
}
return
}
func (self *Environment) getIntArrayField(z interface{}, static bool, name string) (v []int, err error) {
jval, field, err := self.getField(z, static, name, types.Array{types.Basic(types.IntKind)})
if err != nil {
return
}
var oval C.jobject
if static {
oval = C.envGetStaticObjectField(self.env, C.valObject(jval), field.field)
} else {
oval = C.envGetObjectField(self.env, C.valObject(jval), field.field)
}
if oval == nil {
err = self.ExceptionOccurred()
}
if err == nil {
v = self.ToIntArray(newObject(oval))
}
return
}
// C callbacks actually start in the 'generifiedX' calls (see the .c files)
// Next, goCallbackNArgs is used to determine the number of variadic paramers to expect (
// java doesn't inform us of this, and we can't force any of the callback parameters.
//
// Finally, goCallback looks up the 'fId' - our internal function reference ID (the X in generified),
// un(re) marshalls all the parameters appropriately, calls our function, and returns
// any underlying value back to generified who will return it to the JVM.
// The initial jbool indicates success, and any failure should check for exceptions.
//
//export goCallback
func goCallback(envp, obj uintptr, fId int, nargs int, argp uintptr) (ok C.jboolean, val interface{}) {
args := C.ArgListPtr(unsafe.Pointer(argp))
env := AllEnvs.Find(envp)
if env == nil {
panic("Got a nil environment")
}
if env.jvm == nil {
panic("Environment pointer has no JVM")
}
var cd callbackDescriptor
var _ok bool
if cd, _ok = env.jvm.registered[fId]; !_ok {
print("Unknown callbackId: \t", fId, "\n")
return
}
// TODO: pack argp somehow...
if nargs != len(cd.Signature.Params) {
panic("callback/signature length mismatch")
}
inCall := []reflect.Value{reflect.ValueOf(env), reflect.ValueOf(newObject(C.jobject(unsafe.Pointer(obj))))}
var err error
for i := 0; i < nargs; i++ {
switch cd.Signature.Params[i].Kind() {
case types.BoolKind:
inCall = append(inCall, reflect.ValueOf(bool(0 != C.valBool(C.getArg(args, C.int(i))))))
case types.LongKind:
inCall = append(inCall, reflect.ValueOf(int64(C.valLong(C.getArg(args, C.int(i))))))
case types.IntKind:
inCall = append(inCall, reflect.ValueOf(int(C.valInt(C.getArg(args, C.int(i))))))
case types.ShortKind:
inCall = append(inCall, reflect.ValueOf(int16(C.valShort(C.getArg(args, C.int(i))))))
case types.FloatKind:
inCall = append(inCall, reflect.ValueOf(float32(C.valFloat(C.getArg(args, C.int(i))))))
case types.DoubleKind:
inCall = append(inCall, reflect.ValueOf(float64(C.valDouble(C.getArg(args, C.int(i))))))
case types.ClassKind:
inCall = append(inCall, reflect.ValueOf(newObject(C.valObject(C.getArg(args, C.int(i))))))
default:
err = errors.New("Couldn't reflect kind " + cd.Signature.Params[i].Kind().TypeString())
}
if err != nil {
break
}
}
if err != nil {
return
}
outCall := reflect.ValueOf(cd.F).Call(inCall)
switch cd.Signature.Return.Kind() {
case types.VoidKind:
return 1, nil
}
switch cd.Signature.Return.Kind() {
case types.BoolKind:
if outCall[0].Interface().(bool) {
return 1, C.jboolean(C.JNI_TRUE)
} else {
return 1, C.jboolean(C.JNI_FALSE)
}
case types.ByteKind:
return 1, C.jbyte(outCall[0].Interface().(byte))
case types.CharKind:
return 1, C.jchar(outCall[0].Interface().(int))
case types.IntKind:
return 1, C.jint(outCall[0].Interface().(int))
case types.ShortKind:
return 1, C.jshort(outCall[0].Interface().(int16))
case types.LongKind:
return 1, C.jint(outCall[0].Interface().(int64))
case types.FloatKind:
return 1, C.jfloat(outCall[0].Interface().(float32))
case types.DoubleKind:
return 1, C.jdouble(outCall[0].Interface().(float64))
case types.ClassKind:
klass := cd.Signature.Return.(types.Class).Klass
if klass.Cmp(types.JavaLangString) == 0 {
var obj *Object
str := outCall[0].Interface().(string)
obj, err = env.NewStringObject(str)
if err == nil {
return 1, C.jstring(obj.object)
} // else, exception occurred
// not needed as callbacks will reap their own refs.
// env.DeleteLocalRef(obj)
print("String Error\t", err.Error())
return 0, nil
}
return 1, C.jobject(outCall[0].Interface().(*Object).object)
default:
panic("array return type not yet supported")
}
panic("not reached")
}
