/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla 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/MPL/
 *
 * 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 the Mozilla browser.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications, Inc.
 * Portions created by the Initial Developer are Copyright (C) 1999
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Radha Kulkarni <radha@netscape.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of 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 MPL, 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 MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

// Local Includes
#include "nsSHTransaction.h"

//*****************************************************************************
//***    nsSHTransaction: Object Management
//*****************************************************************************

nsSHTransaction::nsSHTransaction() : mPersist(PR_TRUE), mPrev(nsnull) 
{
}


nsSHTransaction::~nsSHTransaction()
{
}

//*****************************************************************************
//    nsSHTransaction: nsISupports
//*****************************************************************************

NS_IMPL_ADDREF(nsSHTransaction)
NS_IMPL_RELEASE(nsSHTransaction)

NS_INTERFACE_MAP_BEGIN(nsSHTransaction)
   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsISHTransaction)
   NS_INTERFACE_MAP_ENTRY(nsISHTransaction)
NS_INTERFACE_MAP_END

//*****************************************************************************
//    nsSHTransaction: nsISHTransaction
//*****************************************************************************

NS_IMETHODIMP
nsSHTransaction::Create(nsISHEntry* aSHEntry, nsISHTransaction* aPrev)
{
   SetSHEntry(aSHEntry);
	if(aPrev)
      aPrev->SetNext(this);

   SetPrev(aPrev);
	return NS_OK;
}

NS_IMETHODIMP
nsSHTransaction::GetSHEntry(nsISHEntry ** aResult)
{
   NS_ENSURE_ARG_POINTER(aResult);
	*aResult = mSHEntry;
	NS_IF_ADDREF(*aResult);
	return NS_OK;
}


NS_IMETHODIMP
nsSHTransaction::SetSHEntry(nsISHEntry * aSHEntry)
{
	mSHEntry = aSHEntry;
	return NS_OK;
}


NS_IMETHODIMP
nsSHTransaction::GetNext(nsISHTransaction * * aResult)
{
   NS_ENSURE_ARG_POINTER(aResult);
   *aResult = mNext;
   NS_IF_ADDREF(*aResult);
   return NS_OK;
}


NS_IMETHODIMP
nsSHTransaction::SetNext(nsISHTransaction * aNext)
{
   NS_ENSURE_SUCCESS(aNext->SetPrev(this), NS_ERROR_FAILURE);

   mNext = aNext;
   return NS_OK;
}

NS_IMETHODIMP
nsSHTransaction::SetPrev(nsISHTransaction * aPrev)
{
	/* This is weak reference to parent. Do not Addref it */
     mPrev = aPrev;
	 return NS_OK;
}

nsresult
nsSHTransaction::GetPrev(nsISHTransaction ** aResult)
{
   NS_ENSURE_ARG_POINTER(aResult);
   *aResult  = mPrev;
   NS_IF_ADDREF(*aResult);
   return NS_OK;
}

NS_IMETHODIMP
nsSHTransaction::SetPersist(PRBool aPersist)
{
   mPersist = aPersist;
   return NS_OK;
}

NS_IMETHODIMP
nsSHTransaction::GetPersist(PRBool* aPersist)
{
   NS_ENSURE_ARG_POINTER(aPersist);

   *aPersist = mPersist;
   return NS_OK;
}