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1 // Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // Customized ECOM resolver for XML plugin parsers |
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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 @file |
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20 @internalComponent |
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21 */ |
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22 |
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23 #include <e32std.h> |
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24 #include <ecom/implementationinformation.h> |
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25 |
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26 #include <xml/xmlframeworkerrors.h> |
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27 #include <xml/xmlframeworkconstants.h> |
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28 #include <xml/matchdata.h> |
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29 |
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30 #include "customresolver.h" |
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31 |
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32 using namespace Xml; |
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33 |
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34 /** |
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35 Class constructor. |
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36 |
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37 @param aRegistry Gives the resolver access to a list of implementations of an interface. |
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38 */ |
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39 CCustomResolver::CCustomResolver(MPublicRegistry& aRegistry) |
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40 :CResolver(aRegistry) |
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41 { |
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42 |
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43 } |
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44 |
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45 /** |
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46 Creates the instance of CCustomResolver class. |
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47 |
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48 @param aRegistry Gives the resolver access to a list of implementations of an interface. |
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49 |
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50 @leave KErrNoMemory If there is not enough memory to create an object |
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51 */ |
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52 |
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53 CCustomResolver* CCustomResolver::NewL(MPublicRegistry& aRegistry) |
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54 { |
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55 return new (ELeave) CCustomResolver(aRegistry); |
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56 } |
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57 |
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58 /** |
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59 Object destructor. |
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60 */ |
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61 CCustomResolver::~CCustomResolver() |
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62 { |
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63 |
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64 } |
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65 |
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66 /** |
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67 Identifies required parsers. |
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68 |
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69 @param aInterfaceUid Interface UID of required parser |
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70 @param aAdditionalParameters Additional parameters for parser resolver |
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71 |
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72 @return Parser's Uid or KNullUid if parser isn't found. |
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73 |
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74 @leave KErrNoMemory If there is not enough memory to create |
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75 necessary objects |
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76 |
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77 @leave KErrArgument If incorrect or partial information is provided |
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78 for parser resolution |
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79 |
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80 @leave KErrXmlMoreThanOneParserMatched |
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81 If Xml framework narrowed down the query |
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82 to many parsers and a user requested to leave |
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83 in such case (LeaveOnMany flag set). |
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84 |
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85 */ |
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86 TUid CCustomResolver::IdentifyImplementationL(TUid aInterfaceUid, const TEComResolverParams& aAdditionalParameters) const |
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87 |
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88 { |
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89 // Unpack user matching criteria. |
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90 // Externalized CMatchData object is stored in a heap based buffer as a stream. |
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91 // Buffer pointer is stored in data type attribute of aAdditionalParameters |
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92 // Specialized NewL method creates a CMatchData object based on that pointer. |
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93 CMatchData* criteria = CMatchData::NewL(aAdditionalParameters.DataType()); |
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94 CleanupStack::PushL(criteria); |
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95 |
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96 // Verify input data |
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97 // Mime type string is a mandatory field for parser resolution |
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98 if (criteria->MimeType().Length() == 0 ) |
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99 User::Leave(KErrArgument); |
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100 |
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101 // This method is designed for plugin parser resolution only |
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102 if (aInterfaceUid != KParserInterfaceUid) |
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103 User::Leave(KErrArgument); |
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104 |
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105 // Use the CResolver method to create an array, so that we get proper cleanup behaviour |
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106 RImplInfoArray& implInfo = CResolver::ListAllL(aInterfaceUid); |
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107 |
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108 // Run the resolution process |
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109 TUid uid = criteria->ResolveL(implInfo); |
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110 |
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111 //clean up |
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112 CleanupStack::PopAndDestroy(criteria); |
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113 implInfo.Close(); |
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114 return uid; |
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115 } |
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116 |
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117 |
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118 /** |
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119 The ListAllL method is not supported by this customized resolver. |
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120 |
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121 @leave KErrNotSupported |
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122 */ |
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123 RImplInfoArray* CCustomResolver::ListAllL(TUid /*aInterfaceUid*/, const TEComResolverParams& /*aAdditionalParameters */) const |
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124 { |
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125 User::Leave(KErrNotSupported); |
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126 return NULL; |
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127 } |
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128 |