1 | /* |
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2 | * Licensed to the Apache Software Foundation (ASF) under one or more |
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3 | * contributor license agreements. See the NOTICE file distributed with |
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4 | * this work for additional information regarding copyright ownership. |
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5 | * The ASF licenses this file to You under the Apache License, Version 2.0 |
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6 | * (the "License"); you may not use this file except in compliance with |
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7 | * the License. You may obtain a copy of the License at |
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8 | * |
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9 | * http://www.apache.org/licenses/LICENSE-2.0 |
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10 | * |
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11 | * Unless required by applicable law or agreed to in writing, software |
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12 | * distributed under the License is distributed on an "AS IS" BASIS, |
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13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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14 | * See the License for the specific language governing permissions and |
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15 | * limitations under the License. |
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16 | */ |
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17 | |
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18 | /* |
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19 | * $Id: XMLElementDecl.hpp 568078 2007-08-21 11:43:25Z amassari $ |
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20 | */ |
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21 | |
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22 | #if !defined(XMLELEMENTDECL_HPP) |
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23 | #define XMLELEMENTDECL_HPP |
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24 | |
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25 | #include <xercesc/framework/XMLAttr.hpp> |
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26 | #include <xercesc/framework/XMLAttDefList.hpp> |
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27 | #include <xercesc/util/XMLString.hpp> |
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28 | #include <xercesc/util/PlatformUtils.hpp> |
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29 | #include <xercesc/internal/XSerializable.hpp> |
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30 | |
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31 | XERCES_CPP_NAMESPACE_BEGIN |
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32 | |
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33 | class ContentSpecNode; |
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34 | class XMLContentModel; |
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35 | |
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36 | /** |
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37 | * This class defines the core information of an element declaration. Each |
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38 | * validator (DTD, Schema, etc...) will have its own information that it |
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39 | * associations with the declaration of an element, but they must all share |
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40 | * at least this core information, i.e. they must all derive from this |
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41 | * class. The set of info enforced at this level is driven by the needs of |
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42 | * XML 1.0 spec validation and well formedness checks. |
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43 | * |
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44 | * This class defines some special element id values for invalid elements |
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45 | * and PCDATA elements, as well as a string for the special PCDATA element |
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46 | * name. All validators must honor these special values in order to allow |
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47 | * content models to work generically (i.e. to let code know when its dealing |
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48 | * with invalid or PCDATA element ids without having to know what type of |
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49 | * validator its messing with.) |
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50 | */ |
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51 | class XMLPARSER_EXPORT XMLElementDecl : public XSerializable, public XMemory |
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52 | { |
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53 | public: |
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54 | // ----------------------------------------------------------------------- |
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55 | // Class specific types |
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56 | // |
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57 | // CreateReasons |
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58 | // This type is used to store how an element declaration got into |
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59 | // the grammar's element pool. They are faulted in for various |
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60 | // reasons. |
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61 | // |
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62 | // LookupOpts |
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63 | // These are the values used by the attribute lookup methods. |
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64 | // |
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65 | // CharDataOpts |
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66 | // This is used to indicate how this type of element reacts to |
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67 | // character data as content. |
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68 | // ----------------------------------------------------------------------- |
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69 | enum CreateReasons |
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70 | { |
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71 | NoReason |
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72 | , Declared |
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73 | , AttList |
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74 | , InContentModel |
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75 | , AsRootElem |
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76 | , JustFaultIn |
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77 | }; |
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78 | |
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79 | /** |
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80 | * @deprecated Use of addIfNotFound couldl produce undefined |
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81 | * behaviour in multithreaded environments. |
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82 | */ |
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83 | enum LookupOpts |
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84 | { |
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85 | AddIfNotFound |
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86 | , FailIfNotFound |
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87 | }; |
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88 | |
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89 | enum CharDataOpts |
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90 | { |
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91 | NoCharData |
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92 | , SpacesOk |
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93 | , AllCharData |
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94 | }; |
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95 | |
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96 | |
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97 | // ----------------------------------------------------------------------- |
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98 | // Public static data |
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99 | // |
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100 | // fgInvalidElemId |
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101 | // A value to represent an invalid element node id. |
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102 | // |
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103 | // fgPCDataElemId |
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104 | // This is the value to use to represent a PCDATA node when an |
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105 | // element id is required. |
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106 | // |
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107 | // fgPCDataElemName |
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108 | // This is the value to use to represent a PCDATA node when an |
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109 | // element name is required. |
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110 | // ----------------------------------------------------------------------- |
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111 | static const unsigned int fgInvalidElemId; |
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112 | static const unsigned int fgPCDataElemId; |
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113 | static const XMLCh fgPCDataElemName[]; |
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114 | |
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115 | |
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116 | |
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117 | // ----------------------------------------------------------------------- |
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118 | // Destructor |
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119 | // ----------------------------------------------------------------------- |
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120 | /** @name Destructor */ |
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121 | //@{ |
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122 | virtual ~XMLElementDecl(); |
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123 | //@} |
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124 | |
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125 | |
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126 | // ----------------------------------------------------------------------- |
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127 | // The virtual element decl interface |
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128 | // ----------------------------------------------------------------------- |
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129 | |
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130 | /** @name Virual ElementDecl interface */ |
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131 | //@{ |
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132 | |
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133 | /** Find an attribute by name or optionally fault it in. |
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134 | * |
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135 | * The derived class should look up the passed attribute in the list of |
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136 | * of attributes for this element. If namespaces are enabled, then it |
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137 | * should use the uriId/baseName pair, else it should use the qName. The |
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138 | * options allow the caller to indicate whether the attribute should be |
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139 | * defaulted in if not found. If it is defaulted in, then wasAdded should |
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140 | * be set, else it should be cleared. If its not found and the caller does |
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141 | * not want defaulting, then return a null pointer. |
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142 | * Note that, in a multithreaded environment, it is dangerous for a |
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143 | * caller to invoke this method with options set to AddIfNotFound. |
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144 | * |
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145 | * @param qName This is the qName of the attribute, i.e. the actual |
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146 | * lexical name found. |
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147 | * |
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148 | * @param uriId This is the id of the URI of the namespace to which |
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149 | * this attribute mapped. Only valid if namespaces are |
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150 | * enabled. |
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151 | * |
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152 | * @param baseName This is the base part of the name, i.e. after any |
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153 | * prefix. |
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154 | * |
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155 | * @param prefix The prefix, if any, of this attribute's name. If |
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156 | * this is empty, then uriID is meaningless as well. |
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157 | * |
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158 | * @param options Indicates the lookup options. |
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159 | * |
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160 | * @param wasAdded Should be set if the attribute is faulted in, else |
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161 | * cleared. |
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162 | */ |
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163 | virtual XMLAttDef* findAttr |
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164 | ( |
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165 | const XMLCh* const qName |
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166 | , const unsigned int uriId |
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167 | , const XMLCh* const baseName |
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168 | , const XMLCh* const prefix |
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169 | , const LookupOpts options |
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170 | , bool& wasAdded |
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171 | ) const = 0; |
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172 | |
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173 | /** Get a list of attributes defined for this element. |
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174 | * |
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175 | * The derived class should return a reference to some member object which |
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176 | * implements the XMLAttDefList interface. This object gives the scanner the |
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177 | * ability to look through the attributes defined for this element. |
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178 | * |
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179 | * It is done this way for efficiency, though of course this is not thread |
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180 | * safe. The scanner guarantees that it won't ever call this method in any |
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181 | * nested way, but the outside world must be careful about when it calls |
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182 | * this method, and optimally never would. |
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183 | */ |
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184 | virtual XMLAttDefList& getAttDefList() const = 0; |
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185 | |
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186 | /** The character data options for this element type |
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187 | * |
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188 | * The derived class should return an appropriate character data opts value |
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189 | * which correctly represents its tolerance towards whitespace or character |
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190 | * data inside of its instances. This allows the scanner to do all of the |
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191 | * validation of character data. |
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192 | */ |
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193 | virtual CharDataOpts getCharDataOpts() const = 0; |
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194 | |
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195 | /** Indicate whether this element type defined any attributes |
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196 | * |
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197 | * The derived class should return a boolean that indicates whether this |
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198 | * element has any attributes defined for it or not. This is an optimization |
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199 | * that allows the scanner to skip some work if no attributes exist. |
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200 | */ |
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201 | virtual bool hasAttDefs() const = 0; |
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202 | |
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203 | /** Reset the flags on the attribute definitions. |
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204 | * |
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205 | * This method is called by the scanner at the beginning of each scan |
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206 | * of a start tag, asking this element decl to reset the 'declared' flag |
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207 | * of each of its attribute defs. This allows the scanner to mark each |
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208 | * one as declared yet or not. |
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209 | */ |
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210 | virtual bool resetDefs() = 0; |
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211 | |
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212 | /** Get a pointer to the content spec node |
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213 | * |
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214 | * This method will return a const pointer to the content spec node object |
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215 | * of this element. |
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216 | * |
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217 | * @return A const pointer to the element's content spec node |
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218 | */ |
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219 | virtual const ContentSpecNode* getContentSpec() const = 0; |
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220 | |
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221 | /** Get a pointer to the content spec node |
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222 | * |
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223 | * This method is identical to the previous one, except that it is non |
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224 | * const. |
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225 | */ |
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226 | virtual ContentSpecNode* getContentSpec() = 0; |
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227 | |
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228 | /** Set the content spec node object for this element type |
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229 | * |
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230 | * This method will adopt the based content spec node object. This is called |
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231 | * by the actual validator which is parsing its DTD or Schema or whatever |
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232 | * and store it on the element decl object via this method. |
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233 | * |
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234 | * @param toAdopt This method will adopt the passed content node spec |
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235 | * object. Any previous object is destroyed. |
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236 | */ |
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237 | virtual void setContentSpec(ContentSpecNode* toAdopt) = 0; |
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238 | |
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239 | /** Get a pointer to the abstract content model |
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240 | * |
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241 | * This method will return a const pointer to the content model object |
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242 | * of this element. This class is a simple abstraction that allows an |
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243 | * element to define and use multiple, specialized content model types |
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244 | * internally but still allow the outside world to do simple stuff with |
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245 | * them. |
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246 | * |
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247 | * @return A pointer to the element's content model, via the basic |
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248 | * abstract content model type. |
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249 | */ |
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250 | virtual XMLContentModel* getContentModel() = 0; |
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251 | |
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252 | /** Set the content model object for this element type |
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253 | * |
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254 | * This method will adopt the based content model object. This is called |
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255 | * by the actual validator which is parsing its DTD or Schema or whatever |
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256 | * a creating an element decl. It will build what it feels is the correct |
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257 | * content model type object and store it on the element decl object via |
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258 | * this method. |
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259 | * |
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260 | * @param newModelToAdopt This method will adopt the passed content model |
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261 | * object. Any previous object is destroyed. |
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262 | */ |
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263 | virtual void setContentModel(XMLContentModel* const newModelToAdopt) = 0; |
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264 | |
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265 | /** Geta formatted string of the content model |
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266 | * |
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267 | * This method is a convenience method which will create a formatted |
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268 | * representation of the content model of the element. It will not always |
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269 | * exactly recreate the original model, since some normalization or |
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270 | * or reformatting may occur. But, it will be a technically accurate |
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271 | * representation of the original content model. |
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272 | * |
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273 | * @return A pointer to an internal buffer which contains the formatted |
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274 | * content model. The caller does not own this buffer and should |
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275 | * copy it if it needs to be kept around. |
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276 | */ |
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277 | virtual const XMLCh* getFormattedContentModel () const = 0; |
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278 | |
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279 | //@} |
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280 | |
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281 | |
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282 | // ----------------------------------------------------------------------- |
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283 | // Getter methods |
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284 | // ----------------------------------------------------------------------- |
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285 | |
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286 | /** @name Getter methods */ |
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287 | //@{ |
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288 | |
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289 | /** Get the base name of this element type. |
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290 | * |
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291 | * Return the base name part of the element's name. This is the |
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292 | * same regardless of whether namespaces are enabled or not. |
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293 | * |
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294 | * @return A const pointer to the base name of the element decl. |
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295 | */ |
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296 | const XMLCh* getBaseName() const; |
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297 | XMLCh* getBaseName(); |
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298 | |
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299 | /** Get the URI id of this element type. |
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300 | * |
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301 | * Return the URI Id of this element. |
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302 | * |
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303 | * @return The URI Id of the element decl, or the emptyNamespaceId if not applicable. |
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304 | */ |
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305 | unsigned int getURI() const; |
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306 | |
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307 | /** Get the QName of this element type. |
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308 | * |
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309 | * Return the QName part of the element's name. This is the |
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310 | * same regardless of whether namespaces are enabled or not. |
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311 | * |
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312 | * @return A const pointer to the QName of the element decl. |
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313 | */ |
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314 | const QName* getElementName() const; |
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315 | QName* getElementName(); |
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316 | |
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317 | /** Get the full name of this element type. |
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318 | * |
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319 | * Return the full name of the element. If namespaces |
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320 | * are not enabled, then this is the qName. Else it is the {uri}baseName |
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321 | * form. For those validators that always require namespace processing, it |
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322 | * will always be in the latter form because namespace processing will always |
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323 | * be on. |
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324 | */ |
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325 | const XMLCh* getFullName() const; |
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326 | |
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327 | /** Get the create reason for this element type |
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328 | * |
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329 | * This method returns an enumeration which indicates why this element |
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330 | * declaration exists. Elements can be used before they are actually |
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331 | * declared, so they will often be faulted into the pool and marked as |
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332 | * to why they are there. |
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333 | * |
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334 | * @return An enumerated value that indicates the reason why this element |
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335 | * was added to the element decl pool. |
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336 | */ |
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337 | |
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338 | CreateReasons getCreateReason() const; |
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339 | |
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340 | /** Get the element decl pool id for this element type |
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341 | * |
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342 | * This method will return the element decl pool id of this element |
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343 | * declaration. This uniquely identifies this element type within the |
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344 | * parse event that it is declared within. This value is assigned by the |
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345 | * grammar whose decl pool this object belongs to. |
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346 | * |
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347 | * @return The element decl id of this element declaration. |
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348 | */ |
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349 | unsigned int getId() const; |
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350 | |
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351 | |
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352 | /** |
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353 | * @return the uri part of DOM Level 3 TypeInfo |
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354 | * @deprecated |
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355 | */ |
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356 | virtual const XMLCh* getDOMTypeInfoUri() const = 0; |
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357 | |
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358 | /** |
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359 | * @return the name part of DOM Level 3 TypeInfo |
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360 | * @deprecated |
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361 | */ |
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362 | virtual const XMLCh* getDOMTypeInfoName() const = 0; |
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363 | |
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364 | |
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365 | /** Indicate whether this element type has been declared yet |
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366 | * |
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367 | * This method returns a boolean that indicates whether this element |
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368 | * has been declared yet. There are a number of reasons why an element |
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369 | * declaration can be faulted in, but eventually it must be declared or |
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370 | * its an error. See the CreateReasons enumeration. |
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371 | * |
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372 | * @return true if this element has been declared, else false. |
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373 | */ |
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374 | bool isDeclared() const; |
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375 | |
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376 | /** Indicate whether this element type has been declared externally |
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377 | * |
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378 | * This method returns a boolean that indicates whether this element |
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379 | * has been declared externally. |
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380 | * |
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381 | * @return true if this element has been declared externally, else false. |
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382 | */ |
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383 | |
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384 | bool isExternal() const; |
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385 | |
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386 | /** Get the memory manager |
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387 | * |
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388 | * This method returns the configurable memory manager used by the |
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389 | * element declaration for dynamic allocation/deacllocation. |
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390 | * |
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391 | * @return the memory manager |
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392 | */ |
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393 | MemoryManager* getMemoryManager() const; |
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394 | |
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395 | //@} |
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396 | |
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397 | |
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398 | // ----------------------------------------------------------------------- |
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399 | // Setter methods |
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400 | // ----------------------------------------------------------------------- |
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401 | |
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402 | /** @name Setter methods */ |
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403 | //@{ |
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404 | |
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405 | /** Set the element name object for this element type |
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406 | * |
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407 | * This method will adopt the based content spec node object. This is called |
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408 | * by the actual validator which is parsing its DTD or Schema or whatever |
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409 | * and store it on the element decl object via this method. |
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410 | * |
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411 | * @param prefix Prefix of the element |
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412 | * @param localPart Base Name of the element |
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413 | * @param uriId The uriId of the element |
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414 | */ |
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415 | void setElementName(const XMLCh* const prefix |
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416 | , const XMLCh* const localPart |
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417 | , const int uriId ); |
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418 | |
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419 | /** Set the element name object for this element type |
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420 | * |
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421 | * This method will adopt the based content spec node object. This is called |
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422 | * by the actual validator which is parsing its DTD or Schema or whatever |
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423 | * and store it on the element decl object via this method. |
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424 | * |
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425 | * @param rawName Full Name of the element |
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426 | * @param uriId The uriId of the element |
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427 | */ |
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428 | void setElementName(const XMLCh* const rawName |
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429 | , const int uriId ); |
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430 | |
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431 | /** Set the element name object for this element type |
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432 | * |
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433 | * This method will adopt the based content spec node object. This is called |
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434 | * by the actual validator which is parsing its DTD or Schema or whatever |
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435 | * and store it on the element decl object via this method. |
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436 | * |
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437 | * @param elementName QName of the element |
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438 | */ |
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439 | void setElementName(const QName* const elementName); |
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440 | |
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441 | /** Update the create reason for this element type. |
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442 | * |
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443 | * This method will update the 'create reason' field for this element |
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444 | * decl object. As the validator parses its DTD, Schema, etc... it will |
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445 | * encounter various references to an element declaration, which will |
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446 | * cause the element declaration to either be declared or to be faulted |
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447 | * into the pool in preperation for some future declaration. As it does |
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448 | * so,it will update this field to indicate the current satus of the |
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449 | * decl object. |
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450 | */ |
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451 | void setCreateReason(const CreateReasons newReason); |
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452 | |
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453 | /** Set the element decl pool id for this element type |
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454 | * |
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455 | * This method will set the pool id of this element decl. This is called |
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456 | * by the grammar which created this object, and will provide this |
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457 | * decl object with a unique id within the parse event that created it. |
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458 | */ |
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459 | void setId(const unsigned int newId); |
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460 | |
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461 | |
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462 | /** Set the element decl to indicate external declaration |
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463 | * |
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464 | */ |
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465 | void setExternalElemDeclaration(const bool aValue); |
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466 | |
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467 | //@} |
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468 | |
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469 | |
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470 | // ----------------------------------------------------------------------- |
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471 | // Miscellaneous methods |
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472 | // ----------------------------------------------------------------------- |
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473 | |
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474 | /** @name Miscellenous methods */ |
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475 | //@{ |
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476 | |
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477 | //@} |
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478 | |
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479 | /*** |
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480 | * Support for Serialization/De-serialization |
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481 | ***/ |
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482 | DECL_XSERIALIZABLE(XMLElementDecl) |
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483 | |
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484 | enum objectType |
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485 | { |
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486 | Schema |
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487 | , DTD |
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488 | , UnKnown |
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489 | }; |
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490 | |
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491 | virtual XMLElementDecl::objectType getObjectType() const = 0; |
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492 | |
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493 | static void storeElementDecl(XSerializeEngine& serEng |
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494 | , XMLElementDecl* const element); |
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495 | |
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496 | static XMLElementDecl* loadElementDecl(XSerializeEngine& serEng); |
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497 | |
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498 | protected : |
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499 | // ----------------------------------------------------------------------- |
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500 | // Hidden constructors |
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501 | // ----------------------------------------------------------------------- |
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502 | XMLElementDecl(MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager); |
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503 | |
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504 | private : |
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505 | // ----------------------------------------------------------------------- |
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506 | // Unimplemented constructors and operators |
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507 | // ----------------------------------------------------------------------- |
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508 | XMLElementDecl(const XMLElementDecl&); |
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509 | XMLElementDecl& operator=(const XMLElementDecl&); |
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510 | |
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511 | |
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512 | // ----------------------------------------------------------------------- |
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513 | // Data members |
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514 | // |
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515 | // fElementName |
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516 | // This is the name of the element decl. |
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517 | // |
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518 | // fCreateReason |
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519 | // We sometimes have to put an element decl object into the elem |
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520 | // decl pool before the element's declaration is seen, such as when |
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521 | // its used in another element's content model or an att list is |
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522 | // seen for it. This flag tells us whether its been declared, and |
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523 | // if not why it had to be created. |
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524 | // |
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525 | // fId |
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526 | // The unique id of this element. This is created by the derived |
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527 | // class, or more accurately the grammar that owns the objects |
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528 | // of the derived types. But, since they all have to have them, we |
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529 | // let them all store the id here. It is defaulted to have the |
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530 | // value fgInvalidElem until explicitly set. |
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531 | // |
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532 | // fExternalElement |
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533 | // This flag indicates whether or the element was declared externally. |
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534 | // ----------------------------------------------------------------------- |
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535 | MemoryManager* fMemoryManager; |
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536 | QName* fElementName; |
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537 | CreateReasons fCreateReason; |
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538 | unsigned int fId; |
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539 | bool fExternalElement; |
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540 | }; |
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541 | |
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542 | |
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543 | // --------------------------------------------------------------------------- |
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544 | // XMLElementDecl: Getter methods |
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545 | // --------------------------------------------------------------------------- |
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546 | inline const XMLCh* XMLElementDecl::getBaseName() const |
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547 | { |
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548 | return fElementName->getLocalPart(); |
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549 | } |
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550 | |
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551 | inline XMLCh* XMLElementDecl::getBaseName() |
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552 | { |
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553 | return fElementName->getLocalPart(); |
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554 | } |
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555 | |
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556 | inline unsigned int XMLElementDecl::getURI() const |
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557 | { |
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558 | return fElementName->getURI(); |
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559 | } |
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560 | |
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561 | inline const QName* XMLElementDecl::getElementName() const |
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562 | { |
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563 | return fElementName; |
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564 | } |
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565 | |
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566 | inline QName* XMLElementDecl::getElementName() |
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567 | { |
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568 | return fElementName; |
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569 | } |
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570 | |
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571 | inline const XMLCh* XMLElementDecl::getFullName() const |
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572 | { |
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573 | return fElementName->getRawName(); |
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574 | } |
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575 | |
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576 | inline XMLElementDecl::CreateReasons XMLElementDecl::getCreateReason() const |
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577 | { |
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578 | return fCreateReason; |
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579 | } |
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580 | |
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581 | inline unsigned int XMLElementDecl::getId() const |
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582 | { |
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583 | return fId; |
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584 | } |
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585 | |
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586 | inline bool XMLElementDecl::isDeclared() const |
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587 | { |
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588 | return (fCreateReason == Declared); |
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589 | } |
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590 | |
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591 | |
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592 | inline bool XMLElementDecl::isExternal() const |
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593 | { |
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594 | return fExternalElement; |
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595 | } |
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596 | |
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597 | inline MemoryManager* XMLElementDecl::getMemoryManager() const |
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598 | { |
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599 | return fMemoryManager; |
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600 | } |
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601 | |
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602 | |
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603 | // --------------------------------------------------------------------------- |
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604 | // XMLElementDecl: Setter methods |
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605 | // --------------------------------------------------------------------------- |
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606 | inline void |
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607 | XMLElementDecl::setCreateReason(const XMLElementDecl::CreateReasons newReason) |
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608 | { |
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609 | fCreateReason = newReason; |
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610 | } |
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611 | |
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612 | inline void XMLElementDecl::setId(const unsigned int newId) |
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613 | { |
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614 | fId = newId; |
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615 | } |
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616 | |
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617 | |
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618 | inline void XMLElementDecl::setExternalElemDeclaration(const bool aValue) |
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619 | { |
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620 | fExternalElement = aValue; |
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621 | } |
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622 | |
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623 | XERCES_CPP_NAMESPACE_END |
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624 | |
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625 | #endif |
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