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1 /* |
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2 * Copyright (c) 2005-2007 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: Active transaction stack |
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15 * |
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16 */ |
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17 |
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18 |
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19 #include "activetransactionstack.h" |
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20 #include "transaction.h" |
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21 #include "xmluicontrollerpanic.h" |
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22 |
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23 |
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24 |
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25 using namespace AiXmlUiController; |
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26 |
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27 // ========================== MEMBER FUNCTIONS =============================== |
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28 |
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29 CActiveTransactionStack::CActiveTransactionStack() |
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30 : iTransactions( CTransaction::LinkOffset() ) |
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31 { |
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32 } |
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33 |
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34 CActiveTransactionStack* CActiveTransactionStack::NewL() |
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35 { |
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36 CActiveTransactionStack* self = new( ELeave ) CActiveTransactionStack; |
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37 |
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38 return self; |
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39 } |
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40 |
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41 CActiveTransactionStack::~CActiveTransactionStack() |
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42 { |
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43 __ASSERT_DEBUG( IsEmpty(), Panic( ETransactionStackNotEmpty ) ); |
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44 } |
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45 |
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46 TBool CActiveTransactionStack::IsEmpty() const |
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47 { |
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48 return iTransactions.IsEmpty(); |
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49 } |
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50 |
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51 void CActiveTransactionStack::Push( MTransaction* aTransaction ) |
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52 { |
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53 CTransaction* tr = dynamic_cast< CTransaction* >( aTransaction ); |
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54 |
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55 if ( tr ) |
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56 { |
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57 iTransactions.AddFirst( *tr ); |
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58 } |
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59 } |
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60 |
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61 MTransaction* CActiveTransactionStack::Pop() |
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62 { |
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63 CTransaction* tr = DoTop(); |
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64 if ( tr ) |
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65 { |
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66 tr->Deque(); |
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67 } |
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68 |
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69 return tr; |
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70 } |
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71 |
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72 MTransaction* CActiveTransactionStack::Top() const |
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73 { |
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74 return DoTop(); |
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75 } |
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76 |
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77 MTransaction* CActiveTransactionStack::Lookup( TInt aTxId ) const |
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78 { |
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79 return DoLookup( aTxId ); |
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80 } |
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81 |
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82 MTransaction* CActiveTransactionStack::Remove( TInt aTxId ) |
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83 { |
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84 CTransaction* tr = DoLookup( aTxId ); |
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85 |
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86 if ( tr ) |
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87 { |
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88 tr->Deque(); |
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89 } |
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90 |
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91 return tr; |
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92 } |
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93 |
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94 CTransaction* CActiveTransactionStack::DoTop() const |
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95 { |
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96 __ASSERT_ALWAYS( !iTransactions.IsEmpty(), Panic( ETransactionStackEmpty ) ); |
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97 |
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98 CTransaction* tr = iTransactions.First(); |
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99 return tr; |
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100 } |
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101 |
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102 CTransaction* CActiveTransactionStack::DoLookup( TInt aTxId ) const |
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103 { |
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104 // Iterate over transactions and search transaction with aTxId |
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105 TDblQueIter< CTransaction > |
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106 iter( const_cast< TDblQue< CTransaction >& >( iTransactions ) ); |
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107 iter.SetToFirst(); |
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108 |
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109 while ( iter ) |
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110 { |
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111 CTransaction* tr = iter++; |
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112 |
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113 if ( tr->Id() == aTxId ) |
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114 { |
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115 // Match. Return transaction |
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116 return tr; |
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117 } |
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118 } |
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119 |
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120 return NULL; |
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121 } |
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122 |
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123 // End of File |