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lightning-sunbird  0.9+nobinonly
nsEmptyEnumerator.h
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00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
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00010  * Software distributed under the License is distributed on an "AS IS" basis,
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00015  * The Original Code is mozilla.org code.
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00017  * The Initial Developer of the Original Code is
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00019  * Portions created by the Initial Developer are Copyright (C) 1998
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *   L. David Baron <dbaron@dbaron.org>
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00025  * Alternatively, the contents of this file may be used under the terms of
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00037  * ***** END LICENSE BLOCK ***** */
00038 
00039 /*
00040 
00041   An empty enumerator.
00042 
00043  */
00044 
00045 #include "nsISimpleEnumerator.h"
00046 #include "nsIStringEnumerator.h"
00047 
00049 
00050 class EmptyEnumeratorImpl : public nsISimpleEnumerator,
00051                             public nsIUTF8StringEnumerator,
00052                             public nsIStringEnumerator
00053 {
00054 public:
00055     EmptyEnumeratorImpl(void);
00056 
00057     // nsISupports interface
00058     NS_DECL_ISUPPORTS_INHERITED  // not really inherited, but no mRefCnt
00059 
00060     // nsISimpleEnumerator
00061     NS_DECL_NSISIMPLEENUMERATOR
00062     NS_DECL_NSIUTF8STRINGENUMERATOR
00063     // can't use NS_DECL_NSISTRINGENUMERATOR because they share the
00064     // HasMore() signature
00065     NS_IMETHOD GetNext(nsAString& aResult);
00066 
00067     static void Shutdown();
00068 
00069 private:
00070     ~EmptyEnumeratorImpl(void);
00071 };