xpcom/components/nsIFactory.idl

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  37
  38 #include "nsISupports.idl"
  39
  40 /**
  41  * A class factory allows the creation of nsISupports derived
  42  * components without specifying a concrete base class.
  43  */
  44
  45 [scriptable, object, uuid(00000001-0000-0000-c000-000000000046)]
  46 interface nsIFactory :  nsISupports {
  47    /**
  48     * Creates an instance of a component.
  49     *
  50     * @param aOuter Pointer to a component that wishes to be aggregated
  51     *               in the resulting instance. This will be nsnull if no
  52     *               aggregation is requested.
  53     * @param iid    The IID of the interface being requested in
  54     *               the component which is being currently created.
  55     * @param result [out] Pointer to the newly created instance, if successful.
  56     * @return NS_OK - Component successfully created and the interface
  57     *                 being requested was successfully returned in result.
  58     *         NS_NOINTERFACE - Interface not accessible.
  59     *         NS_ERROR_NO_AGGREGATION - if an 'outer' object is supplied, but the
  60     *                                   component is not aggregatable.
  61     *         NS_ERROR* - Method failure.
  62     */
  63     void createInstance(in nsISupports aOuter, in nsIIDRef iid,
  64                       [retval, iid_is(iid)] out nsQIResult result);
  65
  66    /**
  67     * LockFactory provides the client a way to keep the component
  68     * in memory until it is finished with it. The client can call
  69     * LockFactory(PR_TRUE) to lock the factory and LockFactory(PR_FALSE)
  70     * to release the factory.
  71     *
  72     * @param lock - Must be PR_TRUE or PR_FALSE
  73     * @return NS_OK - If the lock operation was successful.
  74     *         NS_ERROR* - Method failure.
  75     */
  76     void lockFactory(in PRBool lock);
  77 };