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!
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/
