2007/11/15, Andrew Zhang <[EMAIL PROTECTED]>:
> On Nov 15, 2007 1:22 PM, Jimmy,Jing Lv <[EMAIL PROTECTED]> wrote:
>
> > A simple thought is using the JNI call AllocObject(JNIEnv *env, jclass
> > clazz);
> > however we need to implement a native api then :)
> >
>
> Thanks Jimmy!
>
:)
> AllocObject looks like what I want. ObjectInputStream#newInstance is even
> closer (it has defined a native method). Is it possible to refactor?
> Comments? Thanks!
>
Hmm, it seems the current native method newInstance is used for
ObjectInputStream itself, so refactor it may not be a good idea (will
surely break Harmony function) . I suggest define it in some utility
class or your own class :)
> Java_java_io_ObjectInputStream_newInstance (JNIEnv * env, jclass clazz,
> jobject instantiationClass,
> jobject constructorClass)
> {
> jmethodID mid =
> (*env)->GetMethodID (env, constructorClass, "<init>", "()V");
>
> if (mid == 0)
> {
> /* Cant newInstance,No empty constructor... */
> return (jobject) 0;
> }
> else
> {
> /* Instantiate an object of a given class and constuct it using
> the constructor of the other class. */
> jobject obj;
> obj = (*env)->AllocObject(env, instantiationClass); // I want this
> method :)
> if (obj != NULL) {
> (*env)->CallNonvirtualVoidMethod(env, obj, constructorClass, mid);
> }
> return obj;
> }
>
> }
>
>
> > 2007/11/15, Andrew Zhang <[EMAIL PROTECTED]>:
> > > Hi,
> > >
> > > Is it possible to new an object without invoking any constructor? I know
> > the
> > > question is a bit weird. What I want is to create an object with all
> > > null/default value for its fields.
> > > Reseting all fields to null by reflection is a possible solution, but is
> > > there any existing special method (no matter it's low level or Harmony
> > > specific) which can achieve this goal?
> > > Thanks!
> > >
> > >
> > > --
> > > Best regards,
> > > Andrew Zhang
> > >
> > > http://zhanghuangzhu.blogspot.com/
> > >
> >
> >
> > --
> >
> > Best Regards!
> >
> > Jimmy, Jing Lv
> > China Software Development Lab, IBM
> >
>
>
>
> --
> Best regards,
> Andrew Zhang
>
> http://zhanghuangzhu.blogspot.com/
>
--
Best Regards!
Jimmy, Jing Lv
China Software Development Lab, IBM
