[2674] | 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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