// JFindClass returns the global reference to the Java class with the
// given pathname, or an error if the class cannot be found.
func JFindClass(env Env, name string) (Class, error) {
cName := C.CString(name)
defer C.free(unsafe.Pointer(cName))
class := C.FindClass(env.value(), cName)
if err := JExceptionMsg(env); err != nil || class == nil {
return NullClass, fmt.Errorf("couldn't find class %s: %v", name, err)
}
obj := NewGlobalRef(env, Object(uintptr(unsafe.Pointer(class))))
return Class(uintptr(unsafe.Pointer(C.jclass(obj.value())))), nil
}
// returns a Class object; the object will first be looked up in cache,
// and if not found there, resolved via Java and stored in the cache path.
// classes returned via /THIS/ channel, need not be unrefed, as they all
// hold a global ref.
//
// TODO: in truth, they should probably ALL be local-refs of the cached one...
func (self *Environment) GetClass(klass types.Name) (c *Class, err error) {
c, err = self.findCachedClass(klass)
if err == nil {
return
}
s := C.CString(klass.AsPath())
defer C.free(unsafe.Pointer(s))
// print("envFindClass ", klass,"\n")
kl := C.envFindClass(self.env, s)
if kl == nil {
//print("GetClass missed ", klass.AsPath(), "\n\n")
err = self.ExceptionOccurred()
} else {
err = nil // clear the cache error
//print("found ", klass,"\n")
kl = C.jclass(C.envNewGlobalRef(self.env, kl))
c = newClass(kl)
self.classes[klass.AsPath()] = c
}
return
}
// Syntactic sugar around &Class{C.jclass(LocalRef(&Object{C.jobject(class.class)}))}
func (self *Environment) NewLocalClassRef(c *Class) *Class {
return newClass(C.jclass(C.envNewLocalRef(self.env, c.class)))
}
func (c Class) value() C.jclass {
return C.jclass(unsafe.Pointer(c))
}