Casting issue

[domcir]

Hey

I was able to define a class "CreditDefaultSwap"

and configure smart pointers.

That class is later usd as smart pointer argument.

Unfortunatelly I get a c++ compilation error:

so the type isn't recognised on the C++ side as a smart pointer.
cannot convert argument 1 from 'SharedPtrAdapter<const instruments::CreditDefaultSwap>' to 'const instruments::CreditDefaultSwap &' .

I can't figure out why?

Thanks
Dom

[saudet]

Remove instruments::CreditDefaultSwap and CreditDefaultSwap from the Info list with annotations. Those are not std::shared_ptr so they should not be annotated with @SharedPtr.

[domcir]

class JavaCPP_hidden JavaCPP__0003a_0003aCTP_0003a_0003amodels_0003a_0003aFwdCDSBootstrapHelper : public ::CTP::models::FwdCDSBootstrapHelper {
public:
    jobject obj;
    static jmethodID isConstant__;

    JavaCPP__0003a_0003aCTP_0003a_0003amodels_0003a_0003aFwdCDSBootstrapHelper(const CTP::instruments::CreditDefaultSwap& arg0, ::CTP::utils::GregorianDateBase<CTP::utils::MicroSecondsTag> arg1, ::CTP::utils::GregorianDateBase<CTP::utils::MicroSecondsTag> arg2, const CTP::termstructures::IRates& arg3, double arg4) : ::CTP::models::FwdCDSBootstrapHelper(arg0, arg1, arg2, arg3, arg4), obj(NULL) { }
    JavaCPP__0003a_0003aCTP_0003a_0003amodels_0003a_0003aFwdCDSBootstrapHelper(const CTP::instruments::CreditDefaultSwap& arg0, ::CTP::utils::GregorianDateBase<CTP::utils::MicroSecondsTag> arg1, ::CTP::utils::GregorianDateBase<CTP::utils::MicroSecondsTag> arg2, const CTP::termstructures::IRates& arg3) : ::CTP::models::FwdCDSBootstrapHelper(arg0, arg1, arg2, arg3), obj(NULL) { }
    using ::CTP::models::FwdCDSBootstrapHelper::isConstant;
    virtual bool isConstant() const noexcept JavaCPP_override;
    bool super_isConstant() const noexcept { return ::CTP::models::FwdCDSBootstrapHelper::isConstant(); }
};
jmethodID JavaCPP__0003a_0003aCTP_0003a_0003amodels_0003a_0003aFwdCDSBootstrapHelper::isConstant__ = NULL;

[domcir]

the formatting is broken a bit but the issue is that 'const CTP::instruments::CreditDefaultSwap& arg0' should be a reference to smart pointer not a reference to object.

[domcir]

The JNI code looks as follows:

JNIEXPORT void JNICALL Java_capstone_dlib_00024FwdCDSBootstrapHelper_allocate__Lcapstone_dlib_00024CreditDefaultSwap_2Lcapstone_dlib_00024GregorianDate_2Lcapstone_dlib_00024GregorianDate_2Lcapstone_dlib_00024IRates_2D(JNIEnv* env, jobject obj, jobject arg0, jobject arg1, jobject arg2, jobject arg3, jdouble arg4) {
    ::CTP::instruments::CreditDefaultSwap* ptr0 = arg0 == NULL ? NULL : (::CTP::instruments::CreditDefaultSwap*)jlong_to_ptr(env->GetLongField(arg0, JavaCPP_addressFID));
    if (ptr0 == NULL) {
        env->ThrowNew(JavaCPP_getClass(env, 7), "Pointer address of argument 0 is NULL.");
        return;
    }
    jlong size0 = arg0 == NULL ? 0 : env->GetLongField(arg0, JavaCPP_limitFID);
    void* owner0 = JavaCPP_getPointerOwner(env, arg0);
    jlong position0 = arg0 == NULL ? 0 : env->GetLongField(arg0, JavaCPP_positionFID);
    ptr0 += position0;
    size0 -= position0;
    SharedPtrAdapter< const CTP::instruments::CreditDefaultSwap > adapter0((const CTP::instruments::CreditDefaultSwap*)ptr0, size0, owner0);
    ::CTP::utils::GregorianDateBase<CTP::utils::MicroSecondsTag>* ptr1 = arg1 == NULL ? NULL : (::CTP::utils::GregorianDateBase<CTP::utils::MicroSecondsTag>*)jlong_to_ptr(env->GetLongField(arg1, JavaCPP_addressFID));
    if (ptr1 == NULL) {
        env->ThrowNew(JavaCPP_getClass(env, 7), "Pointer address of argument 1 is NULL.");
        return;
    }
    jlong position1 = arg1 == NULL ? 0 : env->GetLongField(arg1, JavaCPP_positionFID);
    ptr1 += position1;
    ::CTP::utils::GregorianDateBase<CTP::utils::MicroSecondsTag>* ptr2 = arg2 == NULL ? NULL : (::CTP::utils::GregorianDateBase<CTP::utils::MicroSecondsTag>*)jlong_to_ptr(env->GetLongField(arg2, JavaCPP_addressFID));
    if (ptr2 == NULL) {
        env->ThrowNew(JavaCPP_getClass(env, 7), "Pointer address of argument 2 is NULL.");
        return;
    }
    jlong position2 = arg2 == NULL ? 0 : env->GetLongField(arg2, JavaCPP_positionFID);
    ptr2 += position2;
    ::CTP::termstructures::IRates* ptr3 = arg3 == NULL ? NULL : (::CTP::termstructures::IRates*)jlong_to_ptr(env->GetLongField(arg3, JavaCPP_addressFID));
    if (ptr3 == NULL) {
        env->ThrowNew(JavaCPP_getClass(env, 7), "Pointer address of argument 3 is NULL.");
        return;
    }
    jlong size3 = arg3 == NULL ? 0 : env->GetLongField(arg3, JavaCPP_limitFID);
    void* owner3 = JavaCPP_getPointerOwner(env, arg3);
    jlong position3 = arg3 == NULL ? 0 : env->GetLongField(arg3, JavaCPP_positionFID);
    ptr3 += position3;
    size3 -= position3;
    SharedPtrAdapter< const CTP::termstructures::IRates > adapter3((const CTP::termstructures::IRates*)ptr3, size3, owner3);
    jthrowable exc = NULL;
    try {
        ::CTP::models::FwdCDSBootstrapHelper* rptr = new JavaCPP__0003a_0003aCTP_0003a_0003amodels_0003a_0003aFwdCDSBootstrapHelper(adapter0, *ptr1, *ptr2, adapter3, arg4);
        jlong rcapacity = 1;
        JavaCPP_initPointer(env, obj, rptr, rcapacity, rptr, &JavaCPP_capstone_dlib_00024FwdCDSBootstrapHelper_deallocate);
        ((JavaCPP__0003a_0003aCTP_0003a_0003amodels_0003a_0003aFwdCDSBootstrapHelper*)rptr)->obj = env->NewWeakGlobalRef(obj);
    } catch (...) {
        exc = JavaCPP_handleException(env, 9);
    }

    const CTP::instruments::CreditDefaultSwap* rptr0 = (const CTP::instruments::CreditDefaultSwap*)adapter0;
    jlong rsize0 = (jlong)adapter0.size;
    void* rowner0 = adapter0.owner;
    if (rptr0 != (const CTP::instruments::CreditDefaultSwap*)ptr0) {
        JavaCPP_initPointer(env, arg0, rptr0, rsize0, rowner0, &SharedPtrAdapter< const CTP::instruments::CreditDefaultSwap >::deallocate);
    } else {
        env->SetLongField(arg0, JavaCPP_limitFID, rsize0 + position0);
    }
    const CTP::termstructures::IRates* rptr3 = (const CTP::termstructures::IRates*)adapter3;
    jlong rsize3 = (jlong)adapter3.size;
    void* rowner3 = adapter3.owner;
    if (rptr3 != (const CTP::termstructures::IRates*)ptr3) {
        JavaCPP_initPointer(env, arg3, rptr3, rsize3, rowner3, &SharedPtrAdapter< const CTP::termstructures::IRates >::deallocate);
    } else {
        env->SetLongField(arg3, JavaCPP_limitFID, rsize3 + position3);
    }
    if (exc != NULL) {
        env->Throw(exc);
    }
}

[saudet]

I see, we should be able to control that with the second element of the @Cast annotation, something like this here:
https://github.com/bytedeco/javacpp-presets/blob/1.5.8/pytorch/src/main/java/org/bytedeco/pytorch/presets/torch.java#L2499

[domcir]

I used annotations and it works (at least for parsing and compilation).

Thank you!!!