gecko-dev/xpcom/ds/nsEnumeratorUtils.h

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#ifndef nsRDFCursorUtils_h__
#define nsRDFCursorUtils_h__
#include "nsIEnumerator.h"
#include "nsISupportsArray.h"
class NS_COM nsArrayEnumerator : public nsISimpleEnumerator
{
public:
// nsISupports interface
NS_DECL_ISUPPORTS
// nsISimpleEnumerator interface
NS_IMETHOD HasMoreElements(PRBool* aResult);
NS_IMETHOD GetNext(nsISupports** aResult);
// nsRDFArrayEnumerator methods
nsArrayEnumerator(nsISupportsArray* aValueArray);
virtual ~nsArrayEnumerator(void);
protected:
nsISupportsArray* mValueArray;
PRInt32 mIndex;
};
////////////////////////////////////////////////////////////////////////////////
class NS_COM nsSingletonEnumerator : public nsISimpleEnumerator
{
public:
NS_DECL_ISUPPORTS
// nsISimpleEnumerator methods
NS_IMETHOD HasMoreElements(PRBool* aResult);
NS_IMETHOD GetNext(nsISupports** aResult);
nsSingletonEnumerator(nsISupports* aValue);
virtual ~nsSingletonEnumerator();
protected:
nsISupports* mValue;
PRBool mConsumed;
};
////////////////////////////////////////////////////////////////////////////////
class NS_COM nsAdapterEnumerator : public nsISimpleEnumerator
{
public:
NS_DECL_ISUPPORTS
// nsISimpleEnumerator methods
NS_IMETHOD HasMoreElements(PRBool* aResult);
NS_IMETHOD GetNext(nsISupports** aResult);
nsAdapterEnumerator(nsIEnumerator* aEnum);
virtual ~nsAdapterEnumerator();
protected:
nsIEnumerator* mEnum;
nsISupports* mCurrent;
PRBool mStarted;
};
////////////////////////////////////////////////////////////////////////
#endif /* nsRDFCursorUtils_h__ */