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: CMLeaf.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(CMLEAF_HPP) |
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23 | #define CMLEAF_HPP |
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24 | |
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25 | #include <xercesc/validators/common/CMNode.hpp> |
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26 | |
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27 | |
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28 | XERCES_CPP_NAMESPACE_BEGIN |
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29 | |
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30 | // |
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31 | // This class represents a leaf in the content spec node tree of an |
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32 | // element's content model. It just has an element qname and a position value, |
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33 | // the latter of which is used during the building of a DFA. |
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34 | // |
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35 | class CMLeaf : public CMNode |
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36 | { |
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37 | public : |
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38 | // ----------------------------------------------------------------------- |
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39 | // Constructors |
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40 | // ----------------------------------------------------------------------- |
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41 | CMLeaf |
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42 | ( |
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43 | QName* const element |
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44 | , const unsigned int position = (~0) |
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45 | , MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager |
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46 | ); |
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47 | CMLeaf |
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48 | ( |
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49 | QName* const element |
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50 | , const unsigned int position |
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51 | , const bool adopt |
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52 | , MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager |
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53 | ); |
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54 | ~CMLeaf(); |
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55 | |
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56 | |
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57 | // ----------------------------------------------------------------------- |
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58 | // Getter methods |
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59 | // ----------------------------------------------------------------------- |
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60 | QName* getElement(); |
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61 | const QName* getElement() const; |
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62 | unsigned int getPosition() const; |
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63 | |
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64 | |
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65 | // ----------------------------------------------------------------------- |
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66 | // Setter methods |
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67 | // ----------------------------------------------------------------------- |
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68 | void setPosition(const unsigned int newPosition); |
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69 | |
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70 | |
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71 | // ----------------------------------------------------------------------- |
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72 | // Implementation of public CMNode virtual interface |
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73 | // ----------------------------------------------------------------------- |
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74 | bool isNullable() const; |
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75 | |
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76 | |
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77 | protected : |
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78 | // ----------------------------------------------------------------------- |
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79 | // Implementation of protected CMNode virtual interface |
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80 | // ----------------------------------------------------------------------- |
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81 | void calcFirstPos(CMStateSet& toSet) const; |
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82 | void calcLastPos(CMStateSet& toSet) const; |
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83 | |
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84 | |
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85 | private : |
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86 | // ----------------------------------------------------------------------- |
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87 | // Private data members |
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88 | // |
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89 | // fElement |
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90 | // This is the element that this leaf represents. |
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91 | // |
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92 | // fPosition |
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93 | // Part of the algorithm to convert a regex directly to a DFA |
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94 | // numbers each leaf sequentially. If its -1, that means its an |
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95 | // epsilon node. All others are non-epsilon positions. |
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96 | // |
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97 | // fAdopt |
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98 | // This node is responsible for the storage of the fElement QName. |
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99 | // ----------------------------------------------------------------------- |
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100 | QName* fElement; |
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101 | unsigned int fPosition; |
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102 | bool fAdopt; |
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103 | |
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104 | // ----------------------------------------------------------------------- |
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105 | // Unimplemented constructors and operators |
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106 | // ----------------------------------------------------------------------- |
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107 | CMLeaf(const CMLeaf&); |
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108 | CMLeaf& operator=(const CMLeaf&); |
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109 | }; |
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110 | |
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111 | |
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112 | // ----------------------------------------------------------------------- |
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113 | // Constructors |
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114 | // ----------------------------------------------------------------------- |
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115 | inline CMLeaf::CMLeaf( QName* const element |
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116 | , const unsigned int position |
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117 | , MemoryManager* const manager) : |
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118 | CMNode(ContentSpecNode::Leaf, manager) |
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119 | , fElement(0) |
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120 | , fPosition(position) |
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121 | , fAdopt(false) |
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122 | { |
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123 | if (!element) |
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124 | { |
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125 | fElement = new (fMemoryManager) QName |
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126 | ( |
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127 | XMLUni::fgZeroLenString |
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128 | , XMLUni::fgZeroLenString |
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129 | , XMLElementDecl::fgInvalidElemId |
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130 | , fMemoryManager |
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131 | ); |
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132 | // We have to be responsible for this QName - override default fAdopt |
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133 | fAdopt = true; |
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134 | } |
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135 | else |
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136 | { |
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137 | fElement = element; |
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138 | } |
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139 | } |
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140 | |
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141 | inline CMLeaf::CMLeaf( QName* const element |
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142 | , const unsigned int position |
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143 | , const bool adopt |
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144 | , MemoryManager* const manager) : |
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145 | CMNode(ContentSpecNode::Leaf, manager) |
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146 | , fElement(0) |
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147 | , fPosition(position) |
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148 | , fAdopt(adopt) |
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149 | { |
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150 | if (!element) |
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151 | { |
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152 | fElement = new (fMemoryManager) QName |
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153 | ( |
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154 | XMLUni::fgZeroLenString |
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155 | , XMLUni::fgZeroLenString |
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156 | , XMLElementDecl::fgInvalidElemId |
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157 | , fMemoryManager |
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158 | ); |
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159 | // We have to be responsible for this QName - override adopt parameter |
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160 | fAdopt = true; |
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161 | } |
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162 | else |
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163 | { |
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164 | fElement = element; |
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165 | } |
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166 | } |
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167 | |
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168 | inline CMLeaf::~CMLeaf() |
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169 | { |
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170 | if (fAdopt) |
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171 | delete fElement; |
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172 | } |
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173 | |
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174 | |
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175 | // --------------------------------------------------------------------------- |
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176 | // Getter methods |
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177 | // --------------------------------------------------------------------------- |
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178 | inline QName* CMLeaf::getElement() |
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179 | { |
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180 | return fElement; |
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181 | } |
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182 | |
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183 | inline const QName* CMLeaf::getElement() const |
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184 | { |
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185 | return fElement; |
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186 | } |
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187 | |
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188 | inline unsigned int CMLeaf::getPosition() const |
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189 | { |
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190 | return fPosition; |
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191 | } |
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192 | |
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193 | |
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194 | // --------------------------------------------------------------------------- |
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195 | // Setter methods |
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196 | // --------------------------------------------------------------------------- |
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197 | inline void CMLeaf::setPosition(const unsigned int newPosition) |
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198 | { |
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199 | fPosition = newPosition; |
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200 | } |
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201 | |
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202 | |
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203 | // --------------------------------------------------------------------------- |
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204 | // Implementation of public CMNode virtual interface |
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205 | // --------------------------------------------------------------------------- |
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206 | inline bool CMLeaf::isNullable() const |
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207 | { |
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208 | // Leaf nodes are never nullable unless its an epsilon node |
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209 | return (fPosition == -1); |
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210 | } |
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211 | |
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212 | |
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213 | // --------------------------------------------------------------------------- |
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214 | // Implementation of protected CMNode virtual interface |
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215 | // --------------------------------------------------------------------------- |
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216 | inline void CMLeaf::calcFirstPos(CMStateSet& toSet) const |
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217 | { |
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218 | // If we are an epsilon node, then the first pos is an empty set |
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219 | if (fPosition == -1) |
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220 | { |
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221 | toSet.zeroBits(); |
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222 | return; |
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223 | } |
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224 | |
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225 | // Otherwise, its just the one bit of our position |
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226 | toSet.setBit(fPosition); |
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227 | } |
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228 | |
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229 | inline void CMLeaf::calcLastPos(CMStateSet& toSet) const |
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230 | { |
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231 | // If we are an epsilon node, then the last pos is an empty set |
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232 | if (fPosition == -1) |
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233 | { |
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234 | toSet.zeroBits(); |
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235 | return; |
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236 | } |
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237 | |
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238 | // Otherwise, its just the one bit of our position |
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239 | toSet.setBit(fPosition); |
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240 | } |
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241 | |
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242 | XERCES_CPP_NAMESPACE_END |
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243 | |
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244 | #endif |
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