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words (token) are now stored as sstr_t
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1 | /* |
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2 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. |
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3 | * |
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4 | * Copyright 2014 Mike Becker. All rights reserved. |
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5 | * |
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6 | * Redistribution and use in source and binary forms, with or without |
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7 | * modification, are permitted provided that the following conditions are met: |
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8 | * |
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9 | * 1. Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * |
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12 | * 2. Redistributions in binary form must reproduce the above copyright |
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13 | * notice, this list of conditions and the following disclaimer in the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * |
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16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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17 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
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20 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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26 | * POSSIBILITY OF SUCH DAMAGE. |
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27 | * |
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28 | */ |
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29 | |
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30 | package de.uapcore.sigred.doc.base; |
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31 | |
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32 | import de.uapcore.sigred.doc.Resources; |
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33 | import de.uapcore.sigrapi.impl.Digraph; |
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34 | import de.uapcore.sigrapi.impl.Graph; |
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35 | import de.uapcore.sigrapi.IGraph; |
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36 | import java.io.IOException; |
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37 | import java.io.InputStream; |
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38 | import java.io.OutputStream; |
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39 | import java.util.concurrent.atomic.AtomicBoolean; |
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40 | import java.util.concurrent.atomic.AtomicReference; |
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41 | import org.apache.xerces.impl.Constants; |
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42 | import org.dom4j.Document; |
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43 | import org.dom4j.DocumentException; |
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44 | import org.dom4j.DocumentHelper; |
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45 | import org.dom4j.Element; |
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46 | import org.dom4j.Namespace; |
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47 | import org.dom4j.QName; |
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48 | import org.dom4j.io.OutputFormat; |
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49 | import org.dom4j.io.SAXReader; |
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50 | import org.dom4j.io.XMLWriter; |
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51 | import org.xml.sax.ErrorHandler; |
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52 | import org.xml.sax.SAXException; |
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53 | import org.xml.sax.SAXParseException; |
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54 | |
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55 | public abstract class AbstractGraphDocument<T extends IGraph> |
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56 | extends FileBackedDocument { |
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57 | |
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58 | protected static final Namespace NAMESPACE = Namespace.get("sigred", |
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59 | "http://develop.uap-core.de/sigred/"); |
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60 | |
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61 | private static final |
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62 | QName TAG_GRAPHDOC = QName.get("graph-document", NAMESPACE); |
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63 | private static final |
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64 | QName TAG_GRAPH = QName.get("graph", NAMESPACE); |
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65 | private static final |
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66 | QName TAG_DIGRAPH = QName.get("digraph", NAMESPACE); |
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67 | private static final |
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68 | QName TAG_METADATA = QName.get("metadata", NAMESPACE); |
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69 | |
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70 | protected final T graph; |
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71 | |
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72 | private final GraphDocumentMetadata metadata; |
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73 | |
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74 | public AbstractGraphDocument(Class<T> graphType) { |
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75 | T g; |
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76 | try { |
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77 | g = graphType.newInstance(); |
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78 | } catch (ReflectiveOperationException e) { |
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79 | assert false; |
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80 | g = null; // for the compiler |
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81 | } |
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82 | graph = g; |
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83 | metadata = new GraphDocumentMetadata(); |
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84 | } |
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85 | |
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86 | public T getGraph() { |
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87 | return graph; |
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88 | } |
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89 | |
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90 | public GraphDocumentMetadata getMetadata() { |
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91 | return metadata; |
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92 | } |
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93 | |
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94 | protected abstract void writeGraph(Element rootNode) throws IOException; |
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95 | protected abstract void readGraph(Element rootNode) throws IOException; |
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96 | |
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97 | @Override |
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98 | public void writeTo(OutputStream out) throws IOException { |
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99 | Document doc = DocumentHelper.createDocument(); |
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100 | |
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101 | Element rootNode = doc.addElement(TAG_GRAPHDOC); |
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102 | |
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103 | Element metadataNode = rootNode.addElement(TAG_METADATA); |
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104 | |
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105 | metadata.write(metadataNode); |
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106 | |
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107 | if (graph instanceof Graph) { |
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108 | writeGraph(rootNode.addElement(TAG_GRAPH)); |
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109 | } else if (graph instanceof Digraph) { |
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110 | writeGraph(rootNode.addElement(TAG_DIGRAPH)); |
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111 | } else { |
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112 | throw new IOException("unsupported graph type"); |
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113 | } |
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114 | |
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115 | XMLWriter writer = new XMLWriter(out, OutputFormat.createPrettyPrint()); |
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116 | writer.write(doc); |
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117 | writer.flush(); |
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118 | } |
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119 | |
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120 | @Override |
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121 | public void readFrom(InputStream in) throws IOException { |
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122 | try { |
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123 | SAXReader reader = new SAXReader(true); |
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124 | reader.setStripWhitespaceText(true); |
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125 | |
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126 | reader.setFeature(Constants.XERCES_FEATURE_PREFIX+ |
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127 | Constants.SCHEMA_VALIDATION_FEATURE, true); |
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128 | reader.setProperty(Constants.XERCES_PROPERTY_PREFIX + |
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129 | Constants.SCHEMA_LOCATION, String.format("%s %s", |
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130 | NAMESPACE.getURI(), Resources.class.getResource( |
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131 | "graph-document.xsd").toExternalForm())); |
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132 | |
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133 | final AtomicBoolean passed = new AtomicBoolean(true); |
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134 | final AtomicReference<SAXParseException> xmlerror = new AtomicReference<>(); |
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135 | // TODO: we should do more detailed error handling here |
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136 | reader.setErrorHandler(new ErrorHandler() { |
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137 | @Override |
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138 | public void warning(SAXParseException exception) throws SAXException { |
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139 | } |
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140 | |
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141 | @Override |
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142 | public void error(SAXParseException exception) throws SAXException { |
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143 | xmlerror.set(exception); |
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144 | passed.set(false); |
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145 | } |
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146 | |
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147 | @Override |
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148 | public void fatalError(SAXParseException exception) throws SAXException { |
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149 | xmlerror.set(exception); |
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150 | passed.set(false); |
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151 | } |
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152 | |
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153 | }); |
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154 | Document doc = reader.read(in); |
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155 | if (!passed.get()) { |
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156 | // TODO: provide details (maybe via separate error object?) |
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157 | throw xmlerror.get(); |
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158 | } |
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159 | |
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160 | doc.normalize(); |
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161 | |
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162 | Element root = doc.getRootElement(); |
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163 | metadata.read(root.element(TAG_METADATA)); |
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164 | |
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165 | if (graph instanceof Graph) { |
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166 | readGraph(root.element(TAG_GRAPH)); |
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167 | } else if (graph instanceof Digraph) { |
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168 | readGraph(root.element(TAG_DIGRAPH)); |
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169 | } else { |
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170 | throw new IOException("unsupported graph type"); |
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171 | } |
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172 | } catch (DocumentException | SAXException ex) { |
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173 | throw new IOException(ex); |
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174 | } |
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175 | } |
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176 | } |