151 lines
4.0 KiB
C++
151 lines
4.0 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Binder.h : Declaration of CBinder - Provider binder for DS OLE DB Provider
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//
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#if (!defined(BUILD_FOR_NT40))
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#ifndef __BINDER_H_
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#define __BINDER_H_
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/////////////////////////////////////////////////////////////////////////////
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// CBinder
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class ATL_NO_VTABLE CBinder :
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INHERIT_TRACKING,
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public CComObjectRootEx<CComMultiThreadModel>,
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public CComCoClass<CBinder, &CLSID_ADSI_BINDER>,
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public ISupportErrorInfo,
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public IBindResource,
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public IDBBinderProperties
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{
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public:
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CBinder()
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{
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m_pUnkMarshaler = NULL;
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m_pDataSource = NULL;
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m_pSession = NULL;
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m_pDBInitialize = NULL;
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m_pOpenRowset = NULL;
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}
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DECLARE_GET_CONTROLLING_UNKNOWN()
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BEGIN_COM_MAP(CBinder)
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COM_INTERFACE_ENTRY(IBindResource)
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COM_INTERFACE_ENTRY(IDBBinderProperties)
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COM_INTERFACE_ENTRY(IDBProperties)
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COM_INTERFACE_ENTRY_AGGREGATE(IID_IMarshal, m_pUnkMarshaler.p)
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END_COM_MAP()
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HRESULT FinalConstruct()
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{
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//Create Datasource object and get IDBInitialize interface.
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HRESULT hr = CreateDataSource();
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if (FAILED(hr))
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RRETURN(hr);
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//Create a session and get the IOpenRowset interface.
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hr = CreateSession();
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if (FAILED(hr))
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RRETURN(hr);
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//Now initialize binder properties
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hr = InitializeProperties();
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if (FAILED(hr))
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RRETURN(hr);
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//Create an instance of FTM (Free Threaded Marshaler).
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//When aggregated, FTM makes it possible for this object
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//to bypass standard marshaling (and use raw interface pointer)
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//for intraprocess access and use standard marshaling
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//for interprocess access.
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//This FTM is aggregated above in the line:
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//COM_INTERFACE_ENTRY_AGGREGATE(IID_IMarshal, m_pUnkMarshaler.p)
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hr = CoCreateFreeThreadedMarshaler(
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GetControllingUnknown(), &m_pUnkMarshaler.p);
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RRETURN(hr);
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}
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void FinalRelease()
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{
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m_pUnkMarshaler.Release();
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}
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// ISupportsErrorInfo
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STDMETHOD(InterfaceSupportsErrorInfo)(REFIID riid);
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// IBindResource:
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STDMETHODIMP Bind (
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IUnknown * punkOuter,
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LPCOLESTR pwszURL,
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DBBINDURLFLAG dwBindFlags,
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REFGUID rguid,
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REFIID riid,
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IAuthenticate * pAuthenticate,
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DBIMPLICITSESSION * pImplSession,
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DWORD * pdwBindStatus,
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IUnknown ** ppUnk
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);
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// IDBBinderProperties : IDBProperties
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STDMETHODIMP GetProperties(
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ULONG cPropertyIDSets,
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const DBPROPIDSET rgPropertyIDSets[ ],
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ULONG *pcPropertySets,
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DBPROPSET **prgPropertySets);
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STDMETHODIMP GetPropertyInfo(
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ULONG cPropertyIDSets,
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const DBPROPIDSET rgPropertyIDSets[ ],
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ULONG *pcPropertyInfoSets,
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DBPROPINFOSET **prgPropertyInfoSets,
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OLECHAR **ppDescBuffer);
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STDMETHODIMP SetProperties(
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ULONG cPropertySets,
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DBPROPSET rgPropertySets[ ]);
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STDMETHODIMP Reset( void);
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public:
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private:
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//Internal methods
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//Function for initializing Binder properties
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HRESULT InitializeProperties();
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//Function for getting Bind flags from initialization properties.
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//This is used when IBindResource::Bind is called with dwBindFlags = 0
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DWORD BindFlagsFromDbProps();
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//Function to create a data source object - used only at construction time
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HRESULT CreateDataSource();
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//Function to create a session object - used only at construction time.
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HRESULT CreateSession();
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//Smart pointer to FTM.
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CComPtr<IUnknown> m_pUnkMarshaler;
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//Auto critical section.
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auto_cs m_autocs;
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//Implicitly created Data source object.
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CDSOObject *m_pDataSource;
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//pointer to DataSource's IDBInitialize interface.
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auto_rel<IDBInitialize> m_pDBInitialize;
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//Implicitly created Session object.
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CSessionObject *m_pSession;
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//pointer to Session's IOpenRowset interface.
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auto_rel<IOpenRowset> m_pOpenRowset;
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//object that manages properties for this binder instance.
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CDBProperties m_dbProperties;
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};
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#endif //__BINDER_H_
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#endif
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