[SOLVED] QOCIDriver handle from QVariant to void *

Galbarad

Hi all
I have problem with getting OCI handle
I try following code
@QSqlDriver *driver = connect.driver(); // get pointer to driver
QVariant h = driver->handle(); // get QVariant handle
void *vh = h.value<void *>(); // in this point I\m receive 0 @

this is part of QOCIDriver that return handle
@
QVariant QOCIDriver::handle() const
{
// d->env -pointer to OCIEnv ( type OCIEnv * )
return QVariant::fromValue(d->env);
}@

How I can tear off my OCIEnv * from QVariant ?

thank you

ChrisW67

It returns 0 because the QVariant is of custom type OCIStmt* (declared in qsql_oci.cpp and also mentioned in the comment). Try:
@
OCIStmt handle = h.value<OCIStmt>();
@

Galbarad

Hi thank you for you reply, but OCIStmt return as handle in another class
@QVariant QOCIResult::handle() const
{
return QVariant::fromValue(d->sql);
}@

QOCIDriver return OCIEnv *env;

but even I try
@OCIEnv *vhh = h.value<OCIEnv *>();@

I receive compilation errors
use of undefined type 'OCIEnv'
Type argument of Q_DECLARE_METATYPE(T*) must be fully defined
E:\Qt\Qt5.0.0\5.0.0\msvc2010\include\QtCore\qmetatype.h 464

declaration type OCIEnv in oci.h
@typedef struct OCIEnv OCIEnv; /* OCI environment handle */@

as I read somewhere in Internet QVariant store not simple and not QObject values in void * so I suppose that I can take my value through
@void *vh = h.value<void *>();@

Galbarad

problem solved
just use
@QVariant QOCIDriver::handle() const
{
// d->env -pointer to OCIEnv ( type OCIEnv * )
return QVariant::fromValue((void *)d->env);
}@

instead of

@QVariant QOCIDriver::handle() const
{
// d->env -pointer to OCIEnv ( type OCIEnv * )
return QVariant::fromValue(d->env);
}@

How I can add my own method into QOCIDriver??? for example getServerHandle?

thanks