This interface defines a generic interface for requesting interfaces that a given object might provide access to.
Inherits from:
nsISupports
Last changed in Gecko 0.9.5 This is similar to nsISupports.QueryInterface(). The main difference is that interfaces returned are not required to provide a way back to the object implementing nsIInterfaceRequestor. The semantics of nsISupports.QueryInterface() dictate that given an interface A that you nsISupports.QueryInterface() on to get to interface B, you must be able to nsISupports.QueryInterface() on B to get back to A. nsIInterfaceRequestor, however, allows you to obtain an interface C from A that may (or most likely) will not have the ability to get back to A.
Method overview
void getInterface(in nsIIDRef uuid, [iid_is(uuid),retval] out nsQIResult result); |
Methods
getInterface()
Retrieves the specified interface pointer.
void getInterface( in nsIIDRef uuid, [iid_is(uuid),retval] out nsQIResult result );
Parameters
uuid- The IID of the interface being requested.
result- The interface pointer to be filled in if the interface is accessible.
Exceptions thrown
NS_ERROR_NO_INTERFACE- The requested interface is not available.