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1 /* |
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2 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 package com.sun.xml.internal.stream.buffer; |
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27 |
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28 /** |
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29 * Base class for classes that processes {@link XMLStreamBuffer} |
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30 * and produces infoset in API-specific form. |
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31 */ |
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32 public abstract class AbstractProcessor extends AbstractCreatorProcessor { |
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33 protected static final int STATE_ILLEGAL = 0; |
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34 |
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35 protected static final int STATE_DOCUMENT = 1; |
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36 protected static final int STATE_DOCUMENT_FRAGMENT = 2; |
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37 protected static final int STATE_ELEMENT_U_LN_QN = 3; |
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38 protected static final int STATE_ELEMENT_P_U_LN = 4; |
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39 protected static final int STATE_ELEMENT_U_LN = 5; |
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40 protected static final int STATE_ELEMENT_LN = 6; |
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41 protected static final int STATE_TEXT_AS_CHAR_ARRAY_SMALL = 7; |
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42 protected static final int STATE_TEXT_AS_CHAR_ARRAY_MEDIUM = 8; |
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43 protected static final int STATE_TEXT_AS_CHAR_ARRAY_COPY = 9; |
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44 protected static final int STATE_TEXT_AS_STRING = 10; |
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45 protected static final int STATE_TEXT_AS_OBJECT = 11; |
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46 protected static final int STATE_COMMENT_AS_CHAR_ARRAY_SMALL = 12; |
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47 protected static final int STATE_COMMENT_AS_CHAR_ARRAY_MEDIUM = 13; |
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48 protected static final int STATE_COMMENT_AS_CHAR_ARRAY_COPY = 14; |
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49 protected static final int STATE_COMMENT_AS_STRING = 15; |
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50 protected static final int STATE_PROCESSING_INSTRUCTION = 16; |
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51 protected static final int STATE_END = 17; |
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52 private static final int[] _eiiStateTable = new int[256]; |
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53 |
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54 protected static final int STATE_NAMESPACE_ATTRIBUTE = 1; |
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55 protected static final int STATE_NAMESPACE_ATTRIBUTE_P = 2; |
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56 protected static final int STATE_NAMESPACE_ATTRIBUTE_P_U = 3; |
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57 protected static final int STATE_NAMESPACE_ATTRIBUTE_U = 4; |
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58 private static final int[] _niiStateTable = new int[256]; |
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59 |
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60 protected static final int STATE_ATTRIBUTE_U_LN_QN = 1; |
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61 protected static final int STATE_ATTRIBUTE_P_U_LN = 2; |
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62 protected static final int STATE_ATTRIBUTE_U_LN = 3; |
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63 protected static final int STATE_ATTRIBUTE_LN = 4; |
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64 protected static final int STATE_ATTRIBUTE_U_LN_QN_OBJECT = 5; |
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65 protected static final int STATE_ATTRIBUTE_P_U_LN_OBJECT = 6; |
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66 protected static final int STATE_ATTRIBUTE_U_LN_OBJECT = 7; |
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67 protected static final int STATE_ATTRIBUTE_LN_OBJECT = 8; |
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68 private static final int[] _aiiStateTable = new int[256]; |
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69 |
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70 static { |
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71 /* |
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72 * Create a state table from information items and options. |
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73 * The swtich statement using such states will often generate a more |
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74 * efficient byte code representation that can be hotspotted using |
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75 * jump tables. |
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76 */ |
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77 _eiiStateTable[T_DOCUMENT] = STATE_DOCUMENT; |
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78 _eiiStateTable[T_DOCUMENT_FRAGMENT] = STATE_DOCUMENT_FRAGMENT; |
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79 _eiiStateTable[T_ELEMENT_U_LN_QN] = STATE_ELEMENT_U_LN_QN; |
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80 _eiiStateTable[T_ELEMENT_P_U_LN] = STATE_ELEMENT_P_U_LN; |
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81 _eiiStateTable[T_ELEMENT_U_LN] = STATE_ELEMENT_U_LN; |
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82 _eiiStateTable[T_ELEMENT_LN] = STATE_ELEMENT_LN; |
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83 _eiiStateTable[T_TEXT_AS_CHAR_ARRAY_SMALL] = STATE_TEXT_AS_CHAR_ARRAY_SMALL; |
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84 _eiiStateTable[T_TEXT_AS_CHAR_ARRAY_MEDIUM] = STATE_TEXT_AS_CHAR_ARRAY_MEDIUM; |
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85 _eiiStateTable[T_TEXT_AS_CHAR_ARRAY_COPY] = STATE_TEXT_AS_CHAR_ARRAY_COPY; |
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86 _eiiStateTable[T_TEXT_AS_STRING] = STATE_TEXT_AS_STRING; |
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87 _eiiStateTable[T_TEXT_AS_OBJECT] = STATE_TEXT_AS_OBJECT; |
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88 _eiiStateTable[T_COMMENT_AS_CHAR_ARRAY_SMALL] = STATE_COMMENT_AS_CHAR_ARRAY_SMALL; |
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89 _eiiStateTable[T_COMMENT_AS_CHAR_ARRAY_MEDIUM] = STATE_COMMENT_AS_CHAR_ARRAY_MEDIUM; |
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90 _eiiStateTable[T_COMMENT_AS_CHAR_ARRAY_COPY] = STATE_COMMENT_AS_CHAR_ARRAY_COPY; |
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91 _eiiStateTable[T_COMMENT_AS_STRING] = STATE_COMMENT_AS_STRING; |
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92 _eiiStateTable[T_PROCESSING_INSTRUCTION] = STATE_PROCESSING_INSTRUCTION; |
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93 _eiiStateTable[T_END] = STATE_END; |
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94 |
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95 _niiStateTable[T_NAMESPACE_ATTRIBUTE] = STATE_NAMESPACE_ATTRIBUTE; |
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96 _niiStateTable[T_NAMESPACE_ATTRIBUTE_P] = STATE_NAMESPACE_ATTRIBUTE_P; |
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97 _niiStateTable[T_NAMESPACE_ATTRIBUTE_P_U] = STATE_NAMESPACE_ATTRIBUTE_P_U; |
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98 _niiStateTable[T_NAMESPACE_ATTRIBUTE_U] = STATE_NAMESPACE_ATTRIBUTE_U; |
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99 |
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100 _aiiStateTable[T_ATTRIBUTE_U_LN_QN] = STATE_ATTRIBUTE_U_LN_QN; |
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101 _aiiStateTable[T_ATTRIBUTE_P_U_LN] = STATE_ATTRIBUTE_P_U_LN; |
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102 _aiiStateTable[T_ATTRIBUTE_U_LN] = STATE_ATTRIBUTE_U_LN; |
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103 _aiiStateTable[T_ATTRIBUTE_LN] = STATE_ATTRIBUTE_LN; |
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104 _aiiStateTable[T_ATTRIBUTE_U_LN_QN_OBJECT] = STATE_ATTRIBUTE_U_LN_QN_OBJECT; |
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105 _aiiStateTable[T_ATTRIBUTE_P_U_LN_OBJECT] = STATE_ATTRIBUTE_P_U_LN_OBJECT; |
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106 _aiiStateTable[T_ATTRIBUTE_U_LN_OBJECT] = STATE_ATTRIBUTE_U_LN_OBJECT; |
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107 _aiiStateTable[T_ATTRIBUTE_LN_OBJECT] = STATE_ATTRIBUTE_LN_OBJECT; |
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108 } |
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109 |
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110 protected XMLStreamBuffer _buffer; |
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111 |
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112 /** |
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113 * True if this processor should create a fragment of XML, without the start/end document markers. |
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114 */ |
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115 protected boolean _fragmentMode; |
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116 |
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117 protected boolean _stringInterningFeature = false; |
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118 |
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119 /** |
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120 * Number of remaining XML element trees that should be visible |
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121 * through this {@link AbstractProcessor}. |
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122 */ |
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123 protected int _treeCount; |
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124 |
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125 /** |
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126 * @deprecated |
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127 * Use {@link #setBuffer(XMLStreamBuffer, boolean)} |
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128 */ |
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129 protected final void setBuffer(XMLStreamBuffer buffer) { |
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130 setBuffer(buffer,buffer.isFragment()); |
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131 } |
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132 protected final void setBuffer(XMLStreamBuffer buffer, boolean fragmentMode) { |
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133 _buffer = buffer; |
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134 _fragmentMode = fragmentMode; |
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135 |
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136 _currentStructureFragment = _buffer.getStructure(); |
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137 _structure = _currentStructureFragment.getArray(); |
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138 _structurePtr = _buffer.getStructurePtr(); |
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139 |
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140 _currentStructureStringFragment = _buffer.getStructureStrings(); |
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141 _structureStrings = _currentStructureStringFragment.getArray(); |
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142 _structureStringsPtr = _buffer.getStructureStringsPtr(); |
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143 |
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144 _currentContentCharactersBufferFragment = _buffer.getContentCharactersBuffer(); |
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145 _contentCharactersBuffer = _currentContentCharactersBufferFragment.getArray(); |
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146 _contentCharactersBufferPtr = _buffer.getContentCharactersBufferPtr(); |
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147 |
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148 _currentContentObjectFragment = _buffer.getContentObjects(); |
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149 _contentObjects = _currentContentObjectFragment.getArray(); |
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150 _contentObjectsPtr = _buffer.getContentObjectsPtr(); |
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151 |
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152 _stringInterningFeature = _buffer.hasInternedStrings(); |
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153 _treeCount = _buffer.treeCount; |
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154 } |
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155 |
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156 protected final int peekStructure() { |
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157 if (_structurePtr < _structure.length) { |
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158 return _structure[_structurePtr] & 255; |
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159 } |
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160 |
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161 return readFromNextStructure(0); |
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162 } |
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163 |
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164 protected final int readStructure() { |
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165 if (_structurePtr < _structure.length) { |
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166 return _structure[_structurePtr++] & 255; |
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167 } |
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168 |
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169 return readFromNextStructure(1); |
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170 } |
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171 |
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172 protected final int readEiiState() { |
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173 return _eiiStateTable[readStructure()]; |
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174 } |
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175 |
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176 protected static int getEIIState(int item) { |
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177 return _eiiStateTable[item]; |
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178 } |
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179 |
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180 protected static int getNIIState(int item) { |
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181 return _niiStateTable[item]; |
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182 } |
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183 |
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184 protected static int getAIIState(int item) { |
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185 return _aiiStateTable[item]; |
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186 } |
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187 |
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188 protected final int readStructure16() { |
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189 return (readStructure() << 8) | readStructure(); |
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190 } |
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191 |
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192 private int readFromNextStructure(int v) { |
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193 _structurePtr = v; |
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194 _currentStructureFragment = _currentStructureFragment.getNext(); |
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195 _structure = _currentStructureFragment.getArray(); |
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196 return _structure[0] & 255; |
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197 } |
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198 |
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199 protected final String readStructureString() { |
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200 if (_structureStringsPtr < _structureStrings.length) { |
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201 return _structureStrings[_structureStringsPtr++]; |
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202 } |
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203 |
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204 _structureStringsPtr = 1; |
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205 _currentStructureStringFragment = _currentStructureStringFragment.getNext(); |
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206 _structureStrings = _currentStructureStringFragment.getArray(); |
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207 return _structureStrings[0]; |
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208 } |
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209 |
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210 protected final String readContentString() { |
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211 return (String)readContentObject(); |
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212 } |
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213 |
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214 protected final char[] readContentCharactersCopy() { |
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215 return (char[])readContentObject(); |
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216 } |
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217 |
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218 protected final int readContentCharactersBuffer(int length) { |
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219 if (_contentCharactersBufferPtr + length < _contentCharactersBuffer.length) { |
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220 final int start = _contentCharactersBufferPtr; |
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221 _contentCharactersBufferPtr += length; |
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222 return start; |
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223 } |
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224 |
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225 _contentCharactersBufferPtr = length; |
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226 _currentContentCharactersBufferFragment = _currentContentCharactersBufferFragment.getNext(); |
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227 _contentCharactersBuffer = _currentContentCharactersBufferFragment.getArray(); |
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228 return 0; |
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229 } |
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230 |
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231 protected final Object readContentObject() { |
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232 if (_contentObjectsPtr < _contentObjects.length) { |
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233 return _contentObjects[_contentObjectsPtr++]; |
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234 } |
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235 |
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236 _contentObjectsPtr = 1; |
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237 _currentContentObjectFragment = _currentContentObjectFragment.getNext(); |
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238 _contentObjects = _currentContentObjectFragment.getArray(); |
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239 return _contentObjects[0]; |
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240 } |
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241 |
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242 protected final StringBuilder _qNameBuffer = new StringBuilder(); |
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243 |
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244 protected final String getQName(String prefix, String localName) { |
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245 _qNameBuffer.append(prefix).append(':').append(localName); |
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246 final String qName = _qNameBuffer.toString(); |
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247 _qNameBuffer.setLength(0); |
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248 return (_stringInterningFeature) ? qName.intern() : qName; |
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249 } |
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250 |
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251 protected final String getPrefixFromQName(String qName) { |
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252 int pIndex = qName.indexOf(':'); |
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253 if (_stringInterningFeature) { |
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254 return (pIndex != -1) ? qName.substring(0,pIndex).intern() : ""; |
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255 } else { |
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256 return (pIndex != -1) ? qName.substring(0,pIndex) : ""; |
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257 } |
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258 } |
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259 } |