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 * The Original Code is mozilla.org code.
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#ifndef nsregistrydatasource___h____
#define nsregistrydatasource___h____

#include "nsCOMPtr.h"
#include "nsIRDFDataSource.h"
#include "nsEnumeratorUtils.h"
#include "nsIRegistryDataSource.h"
#include "nsIRegistry.h"
#include "nsIServiceManager.h"
#include "nsIRDFService.h"

class nsRegistryDataSource : public nsIRDFDataSource,
                             public nsIRegistryDataSource
{
public:
    NS_DECL_ISUPPORTS

    NS_DECL_NSIRDFDATASOURCE

    NS_DECL_NSIREGISTRYDATASOURCE

    // Implementation methods
    PRInt32 GetKey(nsIRDFResource* aResource);

    nsCOMPtr<nsIRegistry> mRegistry;
    nsCOMPtr<nsISupportsArray> mObservers;

    static nsrefcnt gRefCnt;
    static nsIRDFService* gRDF;

    static nsIRDFResource* kKeyRoot;
    static nsIRDFResource* kSubkeys;
    static nsIRDFLiteral*  kBinaryLiteral;

    class SubkeyEnumerator : public nsISimpleEnumerator
    {
    public:
        NS_DECL_ISUPPORTS

        NS_DECL_NSISIMPLEENUMERATOR

        static nsresult
        Create(nsRegistryDataSource* aViewer, nsIRDFResource* aRootKey, nsISimpleEnumerator** aResult);

    protected:
        nsRegistryDataSource*        mViewer;
        nsCOMPtr<nsIRDFResource> mRootKey;
        nsCOMPtr<nsIEnumerator>  mEnum;
        nsCOMPtr<nsIRDFResource> mCurrent;
        PRBool                   mStarted;

        SubkeyEnumerator(nsRegistryDataSource* aViewer, nsIRDFResource* aRootKey);
        virtual ~SubkeyEnumerator();
        nsresult Init();

        nsresult
        ConvertRegistryNodeToResource(nsISupports* aRegistryNode, nsIRDFResource** aResult);
    };

    nsRegistryDataSource();
    virtual ~nsRegistryDataSource();
    nsresult Init();
};

#endif // nsregistrydatasource___h____