proparrhlp.hxx

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#ifndef INCLUDED_COMPHELPER_PROPARRHLP_HXX
#define INCLUDED_COMPHELPER_PROPARRHLP_HXX
 
#include <comphelper/propagg.hxx>
#include <cppuhelper/propshlp.hxx>
#include <mutex>
#include <osl/diagnose.h>
 
namespace comphelper
{
 
template <class TYPE>
class OPropertyArrayUsageHelper
{
protected:
    static sal_Int32                        s_nRefCount;
    static ::cppu::IPropertyArrayHelper*    s_pProps;
    static std::mutex& theMutex()
    {
        static std::mutex SINGLETON;
        return SINGLETON;
    }
public:
    OPropertyArrayUsageHelper();
    virtual ~OPropertyArrayUsageHelper();
 
    ::cppu::IPropertyArrayHelper*   getArrayHelper();
 
protected:
    virtual ::cppu::IPropertyArrayHelper* createArrayHelper( ) const = 0;
};
 
template <class TYPE>
class OAggregationArrayUsageHelper: public OPropertyArrayUsageHelper<TYPE>
{
protected:
    virtual void fillProperties(
        css::uno::Sequence< css::beans::Property >& /* [out] */ _rProps,
        css::uno::Sequence< css::beans::Property >& /* [out] */ _rAggregateProps
        ) const = 0;
 
    virtual ::cppu::IPropertyArrayHelper* createArrayHelper( ) const;
};
 
template<class TYPE>
sal_Int32                       OPropertyArrayUsageHelper< TYPE >::s_nRefCount  = 0;
 
template<class TYPE>
::cppu::IPropertyArrayHelper*   OPropertyArrayUsageHelper< TYPE >::s_pProps = nullptr;
 
template <class TYPE>
OPropertyArrayUsageHelper<TYPE>::OPropertyArrayUsageHelper()
{
    std::unique_lock aGuard(theMutex());
    ++s_nRefCount;
}
 
template <class TYPE>
OPropertyArrayUsageHelper<TYPE>::~OPropertyArrayUsageHelper()
{
    std::unique_lock aGuard(theMutex());
    OSL_ENSURE(s_nRefCount > 0, "OPropertyArrayUsageHelper::~OPropertyArrayUsageHelper : suspicious call : have a refcount of 0 !");
    if (!--s_nRefCount)
    {
        delete s_pProps;
        s_pProps = nullptr;
    }
}
 
template <class TYPE>
::cppu::IPropertyArrayHelper* OPropertyArrayUsageHelper<TYPE>::getArrayHelper()
{
    OSL_ENSURE(s_nRefCount, "OPropertyArrayUsageHelper::getArrayHelper : suspicious call : have a refcount of 0 !");
    if (!s_pProps)
    {
        std::unique_lock aGuard(theMutex());
        if (!s_pProps)
        {
            s_pProps = createArrayHelper();
            OSL_ENSURE(s_pProps, "OPropertyArrayUsageHelper::getArrayHelper : createArrayHelper returned nonsense !");
        }
    }
    return s_pProps;
}
 
template <class TYPE> inline
::cppu::IPropertyArrayHelper* OAggregationArrayUsageHelper<TYPE>::createArrayHelper() const
{
    css::uno::Sequence< css::beans::Property > aProps;
    css::uno::Sequence< css::beans::Property > aAggregateProps;
    fillProperties(aProps, aAggregateProps);
    OSL_ENSURE(aProps.hasElements(), "OAggregationArrayUsageHelper::createArrayHelper : fillProperties returned nonsense !");
    return new OPropertyArrayAggregationHelper(aProps, aAggregateProps, nullptr, DEFAULT_AGGREGATE_PROPERTY_ID);
}
 
}
 
#endif // INCLUDED_COMPHELPER_PROPARRHLP_HXX
 
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