pjs/xpcom/ds/nsDoubleHashtable.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Netscape Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the NPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "pldhash.h"
#include "nscore.h"
#include "nsCOMPtr.h"
class nsAString;
class nsISupports;
/**
* nsDoubleHashtableStringSupports
*
* A hashtable from string -> nsISupports*. Holds strong references.
*/
class NS_COM nsDoubleHashtableStringSupports {
public:
nsDoubleHashtableStringSupports();
~nsDoubleHashtableStringSupports();
/**
* Get the value referenced by the key.
* Being a getter, this returns a strong reference.
* @param aKey the key
* @return the object referenced by aKey, or nsnull if none
*/
already_AddRefed<nsISupports> Get(const nsAString& aKey);
/**
* Put the value into the hash to be referenced by the key.
* @param aKey the key
* @param aResult the return value
*/
nsresult Put(const nsAString& aKey, nsISupports* aResult);
/**
* Remove the entry from the hash referenced by the key.
* @param aKey the key
* @param aResult the return value
*/
nsresult Remove(nsAString& aKey);
/**
* Initialize this hashtable. This MUST be called for the hashtable
* to work.
*/
nsresult Init();
protected:
// Init() is protected because I want people to just be able to use the class
// without fussing, so it's called in the constructor.
PLDHashTable mHashTable;
};