variant.cpp

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    wxASSERT_MSG( (GetType() == wxT("list")), wxT("Invalid type for == operator") );

    wxVariantDataList other(value);
    return (m_data->Eq(other));
}

bool wxVariant::operator!= (const wxList& value) const
{
    return (!((*this) == value));
}

void wxVariant::operator= (const wxList& value)
{
    if (GetType() == wxT("list"))
    {
        ((wxVariantDataList*)GetData())->SetValue(value);
    }
    else
    {
        if (m_data)
            delete m_data;
        m_data = new wxVariantDataList(value);
    }
}

bool wxVariant::operator== (void* value) const
{
    return (value == ((wxVariantDataVoidPtr*)GetData())->GetValue());
}

bool wxVariant::operator!= (void* value) const
{
    return (!((*this) == (void*) value));
}

void wxVariant::operator= (void* value)
{
    if (GetType() == wxT("void*"))
    {
        ((wxVariantDataVoidPtr*)GetData())->SetValue(value);
    }
    else
    {
        if (m_data)
            delete m_data;
        m_data = new wxVariantDataVoidPtr(value);
    }
}

#if wxUSE_DATETIME
bool wxVariant::operator== (const wxDateTime& value) const
{
    wxDateTime thisValue;
    if (!Convert(&thisValue))
        return false;

    return value.IsEqualTo(thisValue);
}

bool wxVariant::operator!= (const wxDateTime& value) const
{
    return (!((*this) == value));
}

void wxVariant::operator= (const wxDateTime& value)
{
    if (GetType() == wxT("datetime"))
    {
        ((wxVariantDataDateTime*)GetData())->SetValue(value);
    }
    else
    {
        if (m_data)
            delete m_data;
        m_data = new wxVariantDataDateTime(value);
    }
}
#endif // wxUSE_DATETIME

#if wxUSE_ODBC
void wxVariant::operator= (const DATE_STRUCT* value)
{
    if (m_data)
        delete m_data;
    m_data = new wxVariantDataDateTime(value);
}


void wxVariant::operator= (const TIME_STRUCT* value)
{
    if (m_data)
        delete m_data;
    m_data = new wxVariantDataDateTime(value);
}


void wxVariant::operator= (const TIMESTAMP_STRUCT* value)
{
    if (m_data)
        delete m_data;
    m_data = new wxVariantDataDateTime(value);
}

#endif // wxUSE_ODBC

bool wxVariant::operator==(const wxArrayString& WXUNUSED(value)) const
{
    wxFAIL_MSG( _T("TODO") );

    return false;
}

bool wxVariant::operator!=(const wxArrayString& value) const
{
    return !(*this == value);
}

void wxVariant::operator=(const wxArrayString& value)
{
    if (GetType() == wxT("arrstring"))
    {
        ((wxVariantDataArrayString *)GetData())->SetValue(value);
    }
    else
    {
        delete m_data;
        m_data = new wxVariantDataArrayString(value);
    }
}

wxArrayString wxVariant::GetArrayString() const
{
    if ( GetType() == wxT("arrstring") )
        return ((wxVariantDataArrayString *)GetData())->GetValue();

    return wxArrayString();
}


// Treat a list variant as an array
wxVariant wxVariant::operator[] (size_t idx) const
{
#if WXWIN_COMPATIBILITY_2_4
    wxASSERT_MSG( (GetType() == wxT("list") || GetType() == wxT("stringlist")), wxT("Invalid type for array operator") );
#else
    wxASSERT_MSG( GetType() == wxT("list"), wxT("Invalid type for array operator") );
#endif

    if (GetType() == wxT("list"))
    {
        wxVariantDataList* data = (wxVariantDataList*) m_data;
        wxASSERT_MSG( (idx < (size_t) data->GetValue().GetCount()), wxT("Invalid index for array") );
        return * (wxVariant*) (data->GetValue().Item(idx)->GetData());
    }
#if WXWIN_COMPATIBILITY_2_4
    else if (GetType() == wxT("stringlist"))
    {
        wxVariantDataStringList* data = (wxVariantDataStringList*) m_data;
        wxASSERT_MSG( (idx < (size_t) data->GetValue().GetCount()), wxT("Invalid index for array") );

        wxString str( (const wxChar*) (data->GetValue().Item(idx)->GetData()) );
        wxVariant variant( str );
        return variant;
    }
#endif
    return wxNullVariant;
}

wxVariant& wxVariant::operator[] (size_t idx)
{
    // We can't return a reference to a variant for a string list, since the string
    // is actually stored as a char*, not a variant.

    wxASSERT_MSG( (GetType() == wxT("list")), wxT("Invalid type for array operator") );

    wxVariantDataList* data = (wxVariantDataList*) m_data;
    wxASSERT_MSG( (idx < (size_t) data->GetValue().GetCount()), wxT("Invalid index for array") );

    return * (wxVariant*) (data->GetValue().Item(idx)->GetData());
}

// Return the number of elements in a list
int wxVariant::GetCount() const
{
#if WXWIN_COMPATIBILITY_2_4
    wxASSERT_MSG( (GetType() == wxT("list") || GetType() == wxT("stringlist")), wxT("Invalid type for GetCount()") );
#else
    wxASSERT_MSG( GetType() == wxT("list"), wxT("Invalid type for GetCount()") );
#endif

    if (GetType() == wxT("list"))
    {
        wxVariantDataList* data = (wxVariantDataList*) m_data;
        return data->GetValue().GetCount();
    }
#if WXWIN_COMPATIBILITY_2_4
    else if (GetType() == wxT("stringlist"))
    {
        wxVariantDataStringList* data = (wxVariantDataStringList*) m_data;
        return data->GetValue().GetCount();
    }
#endif
    return 0;
}

wxString wxVariant::MakeString() const
{
    if (!IsNull())
    {
        wxString str;
        if (GetData()->Write(str))
            return str;
    }
    return wxEmptyString;
}

// Accessors

void wxVariant::SetData(wxVariantData* data)
{
    if (m_data) delete m_data;
    m_data = data;
}


// Returns a string representing the type of the variant,
// e.g. "string", "bool", "list", "double", "long"
wxString wxVariant::GetType() const
{
    if (IsNull())
        return wxString(wxT("null"));
    else
        return m_data->GetType();
}


bool wxVariant::IsType(const wxString& type) const
{
    return (GetType() == type);
}

bool wxVariant::IsValueKindOf(const wxClassInfo* type) const
{
    wxClassInfo* info=m_data->GetValueClassInfo();
    return info ? info->IsKindOf(type) : false ;
}


// Value accessors
double wxVariant::GetReal() const
{
    double value;
    if (Convert(& value))
        return value;
    else
    {
        wxFAIL_MSG(wxT("Could not convert to a real number"));
        return 0.0;
    }
}

long wxVariant::GetInteger() const
{
    long value;
    if (Convert(& value))
        return value;
    else
    {
        wxFAIL_MSG(wxT("Could not convert to an integer"));
        return 0;
    }
}

char wxVariant::GetChar() const
{
    char value;
    if (Convert(& value))
        return value;
    else
    {
        wxFAIL_MSG(wxT("Could not convert to a char"));
        return 0;
    }
}

bool wxVariant::GetBool() const
{
    bool value;
    if (Convert(& value))
        return value;
    else
    {
        wxFAIL_MSG(wxT("Could not convert to a bool"));
        return 0;
    }
}

wxString wxVariant::GetString() const
{
    wxString value;
    if (!Convert(& value))
    {
        wxFAIL_MSG(wxT("Could not convert to a string"));
    }

    return value;
}

void* wxVariant::GetVoidPtr() const
{
    wxASSERT( (GetType() == wxT("void*")) );

    return (void*) ((wxVariantDataVoidPtr*) m_data)->GetValue();
}

wxObject* wxVariant::GetWxObjectPtr()
{
    wxASSERT(wxIsKindOf(m_data, wxVariantDataWxObjectPtr));
    return (wxObject*) ((wxVariantDataWxObjectPtr*) m_data)->GetValue();
}

#if wxUSE_DATETIME
wxDateTime wxVariant::GetDateTime() const
{
    wxDateTime value;
    if (!Convert(& value))
    {
        wxFAIL_MSG(wxT("Could not convert to a datetime"));
    }

    return value;
}
#endif // wxUSE_DATETIME

wxList& wxVariant::GetList() const
{
    wxASSERT( (GetType() == wxT("list")) );

    return (wxList&) ((wxVariantDataList*) m_data)->GetValue();
}

#if WXWIN_COMPATIBILITY_2_4

wxStringList& wxVariant::GetStringList() const
{
    wxASSERT( (GetType() == wxT("stringlist")) );

    return (wxStringList&) ((wxVariantDataStringList*) m_data)->GetValue();
}

#endif

// Make empty list
void wxVariant::NullList()
{
    SetData(new wxVariantDataList());
};

// Append to list
void wxVariant::Append(const wxVariant& value)
{
    wxList& list = GetList();

    list.Append(new wxVariant(value));
}

// Insert at front of list
void wxVariant::Insert(const wxVariant& value)
{
    wxList& list = GetList();

    list.Insert(new wxVariant(value));
}

// Returns true if the variant is a member of the list
bool wxVariant::Member(const wxVariant& value) const
{
    wxList& list = GetList();

    wxList::compatibility_iterator node = list.GetFirst();
    while (node)
    {
        wxVariant* other = (wxVariant*) node->GetData();
        if (value == *other)
            return true;
        node = node->GetNext();
    }
    return false;
}

// Deletes the nth element of the list
bool wxVariant::Delete(int item)
{
    wxList& list = GetList();

    wxASSERT_MSG( (item < (int) list.GetCount()), wxT("Invalid index to Delete") );
    wxList::compatibility_iterator node = list.Item(item);
    wxVariant* variant = (wxVariant*) node->GetData();
    delete variant;
    list.Erase(node);
    return true;
}

// Clear list
void wxVariant::ClearList()
{
    if (!IsNull() && (GetType() == wxT("list")))
    {
        ((wxVariantDataList*) m_data)->Clear();
    }
    else
    {
        if (!GetType().IsSameAs(wxT("list")))
        {
            delete m_data;
            m_data = NULL;
        }
        m_data = new wxVariantDataList;
    }
}

// Type conversion
bool wxVariant::Convert(long* value) const
{
    wxString type(GetType());
    if (type == wxT("double"))
        *value = (long) (((wxVariantDataReal*)GetData())->GetValue());
    else if (type == wxT("long"))
        *value = ((wxVariantDataLong*)GetData())->GetValue();
#ifdef HAVE_BOOL
    else if (type == wxT("bool"))
        *value = (long) (((wxVariantDataBool*)GetData())->GetValue());
#endif
    else if (type == wxT("string"))
        *value = wxAtol((const wxChar*) ((wxVariantDataString*)GetData())->GetValue());
    else
        return false;

    return true;
}

bool wxVariant::Convert(bool* value) const
{
    wxString type(GetType());
    if (type == wxT("double"))
        *value = ((int) (((wxVariantDataReal*)GetData())->GetValue()) != 0);
    else if (type == wxT("long"))
        *value = (((wxVariantDataLong*)GetData())->GetValue() != 0);
#ifdef HAVE_BOOL
    else if (type == wxT("bool"))
        *value = ((wxVariantDataBool*)GetData())->GetValue();
#endif
    else if (type == wxT("string"))
    {
        wxString val(((wxVariantDataString*)GetData())->GetValue());
        val.MakeLower();
        if (val == wxT("true") || val == wxT("yes") || val == wxT('1') )
            *value = true;
        else if (val == wxT("false") || val == wxT("no") || val == wxT('0') )
            *value = false;
        else
            return false;
    }
    else
        return false;

    return true;
}

bool wxVariant::Convert(double* value) const
{
    wxString type(GetType());
    if (type == wxT("double"))
        *value = ((wxVariantDataReal*)GetData())->GetValue();
    else if (type == wxT("long"))
        *value = (double) (((wxVariantDataLong*)GetData())->GetValue());
#ifdef HAVE_BOOL
    else if (type == wxT("bool"))
        *value = (double) (((wxVariantDataBool*)GetData())->GetValue());
#endif
    else if (type == wxT("string"))
        *value = (double) wxAtof((const wxChar*) ((wxVariantDataString*)GetData())->GetValue());
    else
        return false;

    return true;
}

bool wxVariant::Convert(char* value) const
{
    wxString type(GetType());
    if (type == wxT("char"))
        *value = ((wxVariantDataChar*)GetData())->GetValue();
    else if (type == wxT("long"))
        *value = (char) (((wxVariantDataLong*)GetData())->GetValue());
#ifdef HAVE_BOOL
    else if (type == wxT("bool"))
        *value = (char) (((wxVariantDataBool*)GetData())->GetValue());
#endif
    else
        return false;

    return true;
}

bool wxVariant::Convert(wxString* value) const
{
    *value = MakeString();
    return true;
}

#if wxUSE_DATETIME
bool wxVariant::Convert(wxDateTime* value) const
{
    wxString type(GetType());
    if (type == wxT("datetime"))
    {
        *value = ((wxVariantDataDateTime*)GetData())->GetValue();
        return true;
    }
    // Fallback to string conversion
    wxString val;
    return Convert(&val) &&
                (value->ParseDateTime(val) || value->ParseDate(val));
}
#endif // wxUSE_DATETIME