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1 // Copyright (c) 2006-2009 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 // XPath expression functions |
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15 // |
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16 |
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17 #include <stdapis/libxml2/libxml2_globals.h> |
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18 #include <stdapis/libxml2/libxml2_xpath.h> |
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19 #include "libxml2_xpathinternals_private.h" |
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20 #include <xml/dom/xmlengxpathexpression.h> |
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21 #include <xml/dom/xmlengxformsinstancemap.h> |
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22 #include <xml/dom/xmlengnode.h> |
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23 #include "xmlengdomdefs.h" |
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24 #include <xml/dom/xmlengxpatherrors.h> |
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25 |
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26 #include <xml/utils/xmlengmem.h> |
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27 #include <xml/utils/xmlengxestrings.h> |
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28 |
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29 #define COMPILED_EXPR (static_cast<xmlXPathCompExprPtr>(iInternal)) |
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30 #define INSTANCE_MAP (iInternal2 ? \ |
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31 static_cast<xmlHashTablePtr> \ |
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32 (static_cast<CXmlEngXFormsInstanceMap*>(iInternal2)->iInternal) : NULL) |
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33 |
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34 // ----------------------------------------------------------------------------- |
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35 // Default constructor |
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36 // ----------------------------------------------------------------------------- |
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37 // |
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38 EXPORT_C RXmlEngXPathExpression::RXmlEngXPathExpression():iInternal(NULL), iInternal2(NULL), reserved1(0), reserved2(NULL) |
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39 { |
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40 } |
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41 |
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42 // -------------------------------------------------------------------------------------------- |
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43 // Resets the compiled expression and frees the allocated memory. |
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44 // -------------------------------------------------------------------------------------------- |
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45 // |
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46 EXPORT_C void RXmlEngXPathExpression::Destroy() |
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47 { |
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48 xmlXPathFreeCompExpr(COMPILED_EXPR); |
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49 iInternal = NULL; |
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50 iInternal2 = NULL; |
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51 } |
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52 |
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53 // -------------------------------------------------------------------------------------------- |
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54 // Evaluates this expression. |
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55 // @param[in] aContextNode The node relative to which the expression is evaluated. |
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56 // @param[in] aResolver Namespace-resolver object |
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57 // |
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58 // @return Result of evaluation as an RXmlEngXPathResult object. |
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59 // May leave with KXmlEngErrXPathResult code if result is undefuned |
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60 // -------------------------------------------------------------------------------------------- |
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61 // |
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62 EXPORT_C RXmlEngXPathResult RXmlEngXPathExpression::EvaluateL( |
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63 TXmlEngNode aContextNode, |
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64 const MXmlEngNamespaceResolver* /* aResolver */) const |
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65 { |
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66 xmlXPathContextPtr ctxt = xmlXPathNewContext(INTERNAL_NODEPTR(aContextNode)->doc); |
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67 OOM_IF_NULL(ctxt); |
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68 ctxt->node = INTERNAL_NODEPTR(aContextNode); |
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69 ctxt->instanceDocs = INSTANCE_MAP; |
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70 xmlXPathObjectPtr resultObj = xmlXPathCompiledEval(COMPILED_EXPR, ctxt); |
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71 xmlXPathFreeContext(ctxt); |
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72 if(OOM_FLAG) |
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73 { |
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74 xmlXPathFreeObject(resultObj); |
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75 XmlEngLeaveL(KErrNoMemory); |
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76 } |
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77 if(!resultObj || resultObj->type == XPATH_UNDEFINED) |
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78 { |
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79 xmlXPathFreeObject(resultObj); |
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80 XmlEngLeaveL(KXmlEngErrXPathResult); |
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81 } |
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82 return RXmlEngXPathResult(resultObj); |
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83 } |
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84 |
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85 // -------------------------------------------------------------------------------------------- |
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86 // Does the same as #EvaluateL, but as a side-effect calculates the dependency list of the |
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87 // expression. This is meant to be used by the XForms engine. |
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88 // |
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89 // @param[in] aContextNode The node relative to which the expression is evaluated. |
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90 // @param[in,out] aDependents After the method has returned, contains set of nodes that |
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91 // the expression is dependent on. |
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92 // @param[in] aResolver Namespace-resolver object |
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93 // |
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94 // @return Result of evaluation as an RXmlEngXPathResult object. |
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95 // May leave with KXmlEngErrXPathResult code if result is undefuned, |
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96 // argument node set is not destroyed then. |
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97 // -------------------------------------------------------------------------------------------- |
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98 // |
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99 EXPORT_C RXmlEngXPathResult RXmlEngXPathExpression::EvaluateWithDependenciesL( |
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100 TXmlEngNode aContextNode, |
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101 RXmlEngNodeSet& aDependents, |
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102 const MXmlEngNamespaceResolver* /* aResolver */) const |
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103 { |
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104 xmlXPathContextPtr ctxt = xmlXPathNewContext(INTERNAL_NODEPTR(aContextNode)->doc); |
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105 OOM_IF_NULL(ctxt); |
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106 ctxt->node = INTERNAL_NODEPTR(aContextNode); |
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107 ctxt->instanceDocs = INSTANCE_MAP; |
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108 xmlXPathObjectPtr resultObj = xmlXPathCompiledEvalWithDependencies( |
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109 COMPILED_EXPR, |
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110 ctxt, |
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111 static_cast<xmlNodeSetPtr>(aDependents.iInternal)); |
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112 xmlXPathFreeContext(ctxt); |
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113 if(resultObj->type == XPATH_UNDEFINED) |
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114 { |
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115 xmlXPathFreeObject(resultObj); |
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116 XmlEngLeaveL(KXmlEngErrXPathResult); |
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117 } |
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118 |
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119 return RXmlEngXPathResult(resultObj); |
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120 } |
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121 |
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122 EXPORT_C void RXmlEngXPathExpression::SetExtendedContext( |
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123 void* aContext ) |
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124 { |
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125 COMPILED_EXPR->extendedContext = aContext; |
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126 } |
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127 |
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128 EXPORT_C void* RXmlEngXPathExpression::ExtendedContext() const |
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129 { |
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130 return COMPILED_EXPR->extendedContext; |
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131 } |
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132 |
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133 // ----------------------------------------------------------------------------- |
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134 // Constructor |
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135 // ----------------------------------------------------------------------------- |
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136 // |
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137 RXmlEngXPathExpression::RXmlEngXPathExpression(void* aData, void* aData2):iInternal(aData), iInternal2(aData2) |
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138 { |
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139 } |