storage/src/mozStorageResultSet.cpp

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   4  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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   6  * The contents of this file are subject to the Mozilla Public License Version
   7  * 1.1 (the "License"); you may not use this file except in compliance with
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  20  * Portions created by the Initial Developer are Copyright (C) 2008
  21  * the Initial Developer. All Rights Reserved.
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  23  * Contributor(s):
  24  *   Shawn Wilsher <me@shawnwilsher.com> (Original Author)
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  39
  40 #include "mozStorageRow.h"
  41 #include "mozStorageResultSet.h"
  42
  43 ////////////////////////////////////////////////////////////////////////////////
  44 //// mozStorageResultSet
  45
  46 /**
  47  * Note:  This object is only ever accessed on one thread at a time.  It it not
  48  *        threadsafe, but it does need threadsafe AddRef and Release.
  49  */
  50 NS_IMPL_THREADSAFE_ISUPPORTS1(mozStorageResultSet, mozIStorageResultSet)
  51
  52 mozStorageResultSet::mozStorageResultSet() :
  53     mCurrentIndex(0)
  54 {
  55 }
  56
  57 mozStorageResultSet::~mozStorageResultSet()
  58 {
  59   mData.Clear();
  60 }
  61
  62 nsresult
  63 mozStorageResultSet::add(mozIStorageRow *aRow)
  64 {
  65   return mData.AppendObject(aRow) ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
  66 }
  67
  68 ////////////////////////////////////////////////////////////////////////////////
  69 //// mozIStorageResultSet
  70
  71 NS_IMETHODIMP
  72 mozStorageResultSet::GetNextRow(mozIStorageRow **_row)
  73 {
  74   if (mCurrentIndex >= mData.Count()) {
  75     // Just return null here
  76     return NS_OK;
  77   }
  78
  79   NS_ADDREF(*_row = mData.ObjectAt(mCurrentIndex++));
  80   return NS_OK;
  81 }