1 /* |
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2 * Copyright (c) 2002-2007 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: MNssContextManager interface provides context processing methods for |
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15 * the client. The client gets an instance of the context manager |
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16 * from the vas db manager. The vas db manager owns the context manager |
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17 * and is responsible for deleting the context manager. Clients should not |
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18 * directly delete the context manager. The context manager is simply a |
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19 * colllection of utility methods that are pure virtuals. These methods are implemented |
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20 * internal to VAS, and thus transparent to the client. |
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21 * |
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22 */ |
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23 |
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24 |
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25 |
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26 #ifndef MNSSCONTEXTMGR_H |
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27 #define MNSSCONTEXTMGR_H |
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28 |
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29 #include <e32std.h> |
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30 |
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31 #include "nssvascoreconstant.h" |
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32 |
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33 //FORWARD DECLARATIONS |
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34 class MNssGetContextClient; |
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35 class MNssDeleteContextClient; |
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36 class MNssSaveContextClient; |
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37 class MNssContext; |
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38 |
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39 |
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40 |
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41 // CLASS DECLARATIONS |
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42 /** |
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43 * MNssContextMgr is the public interface class for context management. |
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44 * It provides methods for context creation, saving context into the |
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45 * VAS database, retriving contexts from VAS database, and deletion of |
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46 * context from the VAS database. A context manager cannot be instantiated |
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47 * directly but needs to be got from the VAS DB manager. |
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48 * @lib NssVASApi.lib |
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49 * @since 2.8 |
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50 * |
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51 */ |
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52 class MNssContextMgr |
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53 { |
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54 public: |
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55 /** |
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56 * Create a new empty context |
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57 * @since 2.0 |
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58 * @param |
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59 * @return a reference to a new context object. |
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60 */ |
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61 virtual MNssContext* CreateContextL()=0; |
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62 |
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63 /** |
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64 * GetContext is called to retrieve a context from the VAS DB. |
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65 * This method is asynchronous. A call back will be made to |
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66 * either GetContextCompleted() or GetContextFailed() as |
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67 * defined in the MNssGetContextClient interface. It also returns an |
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68 * error code validating success of call to VAS DB. |
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69 * @since 2.0 |
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70 * @param aContextClient - call back address |
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71 * @param aName - name of context to retreive |
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72 * @return - syncronous error code from function return |
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73 */ |
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74 virtual TInt GetContext( MNssGetContextClient* aContextClient, const TDesC& aName ) = 0; |
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75 |
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76 /** |
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77 * GetContextList is called to retrieve a context list from the VAS DB. |
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78 * This method is asynchronous. A call back will be made to |
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79 * either GetContextListCompleted() or GetContextFailed() as |
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80 * defined in the MNssGetContextClient interface. It also returns an |
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81 * error code validating success of call to VAS DB. |
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82 * @since 2.0 |
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83 * @param aContextClient - call back address |
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84 * @param |
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85 * @return - syncronous error code from function return |
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86 */ |
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87 virtual TInt GetContextList( MNssGetContextClient* aContextClient ) = 0; |
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88 |
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89 /** |
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90 * DeleteContext is called to remove a context from the VAS DB. |
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91 * This method is asynchronous. A call back will be made to |
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92 * either DeleteContextCompleted() or DeleteContextFailed() as |
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93 * defined in the MNssDeleteContextClient interface. It also returns an |
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94 * error code validating success of call to VAS DB. |
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95 * @since 2.0 |
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96 * @param aContextClient - call back address |
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97 * @param aContext - context object to delete |
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98 * @return syncronous error code from function return |
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99 */ |
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100 virtual TInt DeleteContext( MNssDeleteContextClient* aContextClient, |
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101 MNssContext* aContext ) = 0; |
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102 |
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103 /** |
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104 * SaveContext is called to store a context to the VAS DB. |
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105 * This method is asynchronous. A call back will be made to |
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106 * either SaveContextCompleted() or SaveContextFailed() as |
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107 * defined in the MNssSaveContextClient interface. It also returns an |
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108 * error code validating success of call to VAS DB. |
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109 * @since 2.0 |
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110 * @param aContextClient - call back address |
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111 * @param aContext - context object to save |
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112 * @return - syncronous error code from function return |
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113 */ |
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114 virtual TInt SaveContext( MNssSaveContextClient* aContextClient, MNssContext* aContext ) = 0; |
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115 |
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116 /** |
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117 * SaveClientData is called to save client-specific data about the context. |
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118 * This method is asynchronous. A call back will be made to either |
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119 * SaveContextCompleted or SaveContextFailed() as defined in the |
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120 * MNssSaveContextClient interface. It also returns an error code validating |
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121 * success of call to VAS DB. |
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122 * @since 2.8 |
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123 * @param aContextClient - call back address. |
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124 * @param aContext - the client data of this context will be updated. |
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125 * @param aClientData - buffer of serialized client data, at most 100 bytes. |
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126 */ |
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127 virtual TInt SaveClientData( MNssContext* aContext ) = 0; |
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128 |
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129 /** |
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130 * Cancel get context / get context list / get global contexts |
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131 * @since 3.2 |
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132 * @param none |
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133 * @return none |
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134 */ |
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135 virtual void CancelGetContext() = 0; |
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136 |
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137 }; |
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138 |
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139 #endif // MNSSCONTEXTMGR_H |
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