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#include "qcontactinvalidfilter.h"
#include "qcontactfilter_p.h"

/*!
  \class QContactInvalidFilter
  \brief The QContactInvalidFilter class matches no contacts.
   \ingroup contacts-filters
 
  This class provides a filter which will never match any contacts
 */

QTM_BEGIN_NAMESPACE

class QContactInvalidFilterPrivate : public QContactFilterPrivate
{
public:
    QContactInvalidFilterPrivate()
       : QContactFilterPrivate()
    {
    }

    bool compare(const QContactFilterPrivate*) const
    {
        return true; // all invalid filters are alike
    }

    /* There is no way this can be called - d is never detached */
    QContactFilterPrivate* clone() const
    {
        return new QContactInvalidFilterPrivate();
    }

    QContactFilter::FilterType type() const
    {
        return QContactFilter::InvalidFilter;
    }

    QList<QContactFilter> m_filters;
};

/*!
 * Constructs a new invalid filter
 */
QContactInvalidFilter::QContactInvalidFilter()
    : QContactFilter(new QContactInvalidFilterPrivate)
{
}

/*!
 * Constructs a new invalid filter, ignoring the \a other filter
 */
QContactInvalidFilter::QContactInvalidFilter(const QContactFilter& other)
    : QContactFilter(new QContactInvalidFilterPrivate)
{
    // Initializing a QCIF from anything is the same as just constructing a QCIF
    Q_UNUSED(other);
}

QTM_END_NAMESPACE