GlobalRef.hxx

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#pragma once
 
#include <java/LocalRef.hxx>
#include <java/lang/Object.hxx>
 
 
namespace connectivity::jdbc
{
    template< typename T >
    class GlobalRef
    {
    public:
        GlobalRef()
            :m_object( nullptr )
        {
        }
 
        GlobalRef( const GlobalRef& _source )
            :m_object( nullptr )
        {
            *this = _source;
        }
 
        GlobalRef& operator=( const GlobalRef& _source )
        {
            if ( &_source == this )
                return *this;
 
            SDBThreadAttach t;
            set( t.env(), _source.get() );
            return *this;
        }
 
        ~GlobalRef() COVERITY_NOEXCEPT_FALSE
        {
            reset();
        }
 
        void reset()
        {
            if ( m_object != nullptr )
            {
                SDBThreadAttach t;
                t.env().DeleteGlobalRef( m_object );
                m_object = nullptr;
            }
        }
 
        void set( JNIEnv& _environment, T _object )
        {
            if ( m_object != nullptr )
                _environment.DeleteGlobalRef( m_object );
            m_object = _object;
            if ( m_object )
                m_object = static_cast< T >( _environment.NewGlobalRef( m_object ) );
        }
 
        void set( LocalRef< T >& _object )
        {
            set( _object.env(), _object.release() );
        }
 
        T get() const
        {
            return m_object;
        }
 
        bool is() const
        {
            return m_object != nullptr;
        }
 
    private:
        T   m_object;
    };
 
 
} // namespace connectivity::jdbc
 
 
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