Mercurial > projects > dwt2
annotate org.eclipse.jface.text/src/org/eclipse/jface/text/templates/persistence/TemplateReaderWriter.d @ 12:bc29606a740c
Added dwt-addons in original directory structure of eclipse.org
author | Frank Benoit <benoit@tionex.de> |
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date | Sat, 14 Mar 2009 18:23:29 +0100 |
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1 /******************************************************************************* |
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2 * Copyright (c) 2000, 2008 IBM Corporation and others. |
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3 * All rights reserved. This program and the accompanying materials |
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4 * are made available under the terms of the Eclipse Public License v1.0 |
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5 * which accompanies this distribution, and is available at |
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6 * http://www.eclipse.org/legal/epl-v10.html |
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7 * |
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8 * Contributors: |
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9 * IBM Corporation - initial API and implementation |
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10 * Port to the D programming language: |
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11 * Frank Benoit <benoit@tionex.de> |
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12 *******************************************************************************/ |
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13 module org.eclipse.jface.text.templates.persistence.TemplateReaderWriter; |
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14 |
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15 import org.eclipse.jface.text.templates.persistence.TemplatePersistenceData; // packageimport |
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16 import org.eclipse.jface.text.templates.persistence.TemplatePersistenceMessages; // packageimport |
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17 import org.eclipse.jface.text.templates.persistence.TemplateStore; // packageimport |
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18 |
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19 |
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20 import java.lang.all; |
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21 import java.util.Collection; |
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22 import java.util.ArrayList; |
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23 import java.util.Set; |
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24 import java.util.HashSet; |
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25 import java.io.InputStream; |
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26 import java.io.OutputStream; |
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27 import java.util.ResourceBundle; |
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28 import java.util.MissingResourceException; |
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29 |
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30 /+ |
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31 import javax.xml.parsers.DocumentBuilder; |
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32 import javax.xml.parsers.DocumentBuilderFactory; |
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33 import javax.xml.parsers.ParserConfigurationException; |
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34 import javax.xml.transform.OutputKeys; |
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35 import javax.xml.transform.Transformer; |
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36 import javax.xml.transform.TransformerException; |
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37 import javax.xml.transform.TransformerFactory; |
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38 import javax.xml.transform.dom.DOMSource; |
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39 import javax.xml.transform.stream.StreamResult; |
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40 |
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41 import org.w3c.dom.Attr; |
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42 import org.w3c.dom.Document; |
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43 import org.w3c.dom.NamedNodeMap; |
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44 import org.w3c.dom.Node; |
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45 import org.w3c.dom.NodeList; |
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46 import org.w3c.dom.Text; |
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47 import org.xml.sax.InputSource; |
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48 import org.xml.sax.SAXException; |
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49 +/ |
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50 |
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51 import org.eclipse.core.runtime.Assert; |
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52 import org.eclipse.jface.text.templates.Template; |
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53 |
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54 /** |
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55 * Serializes templates as character or byte stream and reads the same format |
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56 * back. |
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57 * <p> |
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58 * Clients may instantiate this class, it is not intended to be |
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59 * subclassed.</p> |
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60 * |
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61 * @since 3.0 |
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62 * @noextend This class is not intended to be subclassed by clients. |
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63 */ |
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64 public class TemplateReaderWriter { |
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65 |
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66 private static const String TEMPLATE_ROOT = "templates"; //$NON-NLS-1$ |
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67 private static const String TEMPLATE_ELEMENT = "template"; //$NON-NLS-1$ |
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68 private static const String NAME_ATTRIBUTE= "name"; //$NON-NLS-1$ |
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69 private static const String ID_ATTRIBUTE= "id"; //$NON-NLS-1$ |
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70 private static const String DESCRIPTION_ATTRIBUTE= "description"; //$NON-NLS-1$ |
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71 private static const String CONTEXT_ATTRIBUTE= "context"; //$NON-NLS-1$ |
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72 private static const String ENABLED_ATTRIBUTE= "enabled"; //$NON-NLS-1$ |
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73 private static const String DELETED_ATTRIBUTE= "deleted"; //$NON-NLS-1$ |
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74 /** |
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75 * @since 3.1 |
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76 */ |
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77 private static const String AUTO_INSERTABLE_ATTRIBUTE= "autoinsert"; //$NON-NLS-1$ |
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78 |
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79 /** |
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80 * Create a new instance. |
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81 */ |
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82 public this() { |
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83 } |
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84 |
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85 /** |
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86 * Reads templates from a reader and returns them. The reader must present |
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87 * a serialized form as produced by the <code>save</code> method. |
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88 * |
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89 * @param reader the reader to read templates from |
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90 * @return the read templates, encapsulated in instances of <code>TemplatePersistenceData</code> |
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91 * @throws IOException if reading from the stream fails |
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92 */ |
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93 public TemplatePersistenceData[] read(Reader reader) { |
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94 return read(reader, null); |
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95 } |
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96 |
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97 /** |
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98 * Reads the template with identifier <code>id</code> from a reader and |
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99 * returns it. The reader must present a serialized form as produced by the |
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100 * <code>save</code> method. |
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101 * |
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102 * @param reader the reader to read templates from |
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103 * @param id the id of the template to return |
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104 * @return the read template, encapsulated in an instances of |
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105 * <code>TemplatePersistenceData</code> |
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106 * @throws IOException if reading from the stream fails |
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107 * @since 3.1 |
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108 */ |
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109 public TemplatePersistenceData readSingle(Reader reader, String id) { |
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110 implMissing(__FILE__,__LINE__); |
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111 /+ TemplatePersistenceData[] datas= read(new InputSource(reader), null, id); |
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112 if (datas.length > 0) |
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113 return datas[0];+/ |
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114 return null; |
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115 } |
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116 |
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117 /** |
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118 * Reads templates from a stream and adds them to the templates. |
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119 * |
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120 * @param reader the reader to read templates from |
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121 * @param bundle a resource bundle to use for translating the read templates, or <code>null</code> if no translation should occur |
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122 * @return the read templates, encapsulated in instances of <code>TemplatePersistenceData</code> |
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123 * @throws IOException if reading from the stream fails |
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124 */ |
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125 public TemplatePersistenceData[] read(Reader reader, ResourceBundle bundle) { |
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126 implMissing(__FILE__,__LINE__); |
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127 return null; |
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128 // return read(new InputSource(reader), bundle, null); |
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129 } |
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130 |
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131 /** |
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132 * Reads templates from a stream and adds them to the templates. |
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133 * |
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134 * @param stream the byte stream to read templates from |
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135 * @param bundle a resource bundle to use for translating the read templates, or <code>null</code> if no translation should occur |
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136 * @return the read templates, encapsulated in instances of <code>TemplatePersistenceData</code> |
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137 * @throws IOException if reading from the stream fails |
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138 */ |
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139 public TemplatePersistenceData[] read(InputStream stream, ResourceBundle bundle) { |
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140 implMissing(__FILE__,__LINE__); |
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141 return null; |
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142 // return read(new InputSource(stream), bundle, null); |
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143 } |
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144 /++ |
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145 /** |
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146 * Reads templates from an <code>InputSource</code> and adds them to the templates. |
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147 * |
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148 * @param source the input source |
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149 * @param bundle a resource bundle to use for translating the read templates, or <code>null</code> if no translation should occur |
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150 * @param singleId the template id to extract, or <code>null</code> to read in all templates |
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151 * @return the read templates, encapsulated in instances of <code>TemplatePersistenceData</code> |
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152 * @throws IOException if reading from the stream fails |
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153 */ |
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154 private TemplatePersistenceData[] read(InputSource source, ResourceBundle bundle, String singleId) { |
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155 try { |
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156 Collection templates= new ArrayList(); |
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157 Set ids= new HashSet(); |
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158 |
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159 DocumentBuilderFactory factory= DocumentBuilderFactory.newInstance(); |
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160 DocumentBuilder parser= factory.newDocumentBuilder(); |
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161 Document document= parser.parse(source); |
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162 |
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163 NodeList elements= document.getElementsByTagName(TEMPLATE_ELEMENT); |
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164 |
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165 int count= elements.getLength(); |
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166 for (int i= 0; i !is count; i++) { |
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167 Node node= elements.item(i); |
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168 NamedNodeMap attributes= node.getAttributes(); |
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169 |
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170 if (attributes is null) |
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171 continue; |
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172 |
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173 String id= getStringValue(attributes, ID_ATTRIBUTE, null); |
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174 if (id !is null && ids.contains(id)) |
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175 throw new IOException(TemplatePersistenceMessages.getString("TemplateReaderWriter.duplicate.id")); //$NON-NLS-1$ |
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176 |
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177 if (singleId !is null && !singleId.equals(id)) |
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178 continue; |
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179 |
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180 bool deleted = getBooleanValue(attributes, DELETED_ATTRIBUTE, false); |
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181 |
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182 String name= getStringValue(attributes, NAME_ATTRIBUTE); |
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183 name= translateString(name, bundle); |
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184 |
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185 String description= getStringValue(attributes, DESCRIPTION_ATTRIBUTE, ""); //$NON-NLS-1$ |
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186 description= translateString(description, bundle); |
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187 |
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188 String context= getStringValue(attributes, CONTEXT_ATTRIBUTE); |
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189 |
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190 if (name is null || context is null) |
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191 throw new IOException(TemplatePersistenceMessages.getString("TemplateReaderWriter.error.missing_attribute")); //$NON-NLS-1$ |
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192 |
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193 bool enabled = getBooleanValue(attributes, ENABLED_ATTRIBUTE, true); |
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194 bool autoInsertable= getBooleanValue(attributes, AUTO_INSERTABLE_ATTRIBUTE, true); |
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195 |
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196 StringBuffer buffer= new StringBuffer(); |
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197 NodeList children= node.getChildNodes(); |
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198 for (int j= 0; j !is children.getLength(); j++) { |
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199 String value= children.item(j).getNodeValue(); |
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200 if (value !is null) |
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201 buffer.append(value); |
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202 } |
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203 String pattern= buffer.toString(); |
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204 pattern= translateString(pattern, bundle); |
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205 |
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206 Template template_= new Template(name, description, context, pattern, autoInsertable); |
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207 TemplatePersistenceData data= new TemplatePersistenceData(template_, enabled, id); |
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208 data.setDeleted(deleted); |
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209 |
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210 templates.add(data); |
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211 |
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212 if (singleId !is null && singleId.equals(id)) |
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213 break; |
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214 } |
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215 |
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216 return arraycast!(TemplatePersistenceData)( templates.toArray()); |
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217 |
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218 } catch (ParserConfigurationException e) { |
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219 Assert.isTrue(false); |
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220 } catch (SAXException e) { |
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221 Throwable t= e.getCause(); |
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222 if ( cast(IOException)t ) |
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223 throw cast(IOException) t; |
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224 else if (t !is null) |
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225 throw new IOException(t.getMessage()); |
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226 else |
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227 throw new IOException(e.getMessage()); |
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228 } |
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229 |
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230 return null; // dummy |
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231 } |
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232 ++/ |
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233 /** |
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234 * Saves the templates as XML, encoded as UTF-8 onto the given byte stream. |
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235 * |
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236 * @param templates the templates to save |
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237 * @param stream the byte output to write the templates to in XML |
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238 * @throws IOException if writing the templates fails |
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239 */ |
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240 public void save(TemplatePersistenceData[] templates, OutputStream stream) { |
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241 implMissing(__FILE__,__LINE__); |
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242 // save(templates, new StreamResult(stream)); |
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243 } |
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244 |
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245 /** |
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246 * Saves the templates as XML. |
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247 * |
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248 * @param templates the templates to save |
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249 * @param writer the writer to write the templates to in XML |
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250 * @throws IOException if writing the templates fails |
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251 */ |
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252 public void save(TemplatePersistenceData[] templates, Writer writer) { |
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253 implMissing(__FILE__,__LINE__); |
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254 // save(templates, new StreamResult(writer)); |
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255 } |
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256 |
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257 /++ |
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258 /** |
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259 * Saves the templates as XML. |
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260 * |
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261 * @param templates the templates to save |
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262 * @param result the stream result to write to |
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263 * @throws IOException if writing the templates fails |
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264 */ |
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265 private void save(TemplatePersistenceData[] templates, StreamResult result) { |
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266 try { |
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267 DocumentBuilderFactory factory= DocumentBuilderFactory.newInstance(); |
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268 DocumentBuilder builder= factory.newDocumentBuilder(); |
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269 Document document= builder.newDocument(); |
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270 |
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271 Node root= document.createElement(TEMPLATE_ROOT); |
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272 document.appendChild(root); |
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273 |
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274 for (int i= 0; i < templates.length; i++) { |
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275 TemplatePersistenceData data= templates[i]; |
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276 Template template_= data.getTemplate(); |
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277 |
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278 Node node= document.createElement(TEMPLATE_ELEMENT); |
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279 root.appendChild(node); |
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280 |
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281 NamedNodeMap attributes= node.getAttributes(); |
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282 |
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283 String id= data.getId(); |
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284 if (id !is null) { |
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285 Attr idAttr= document.createAttribute(ID_ATTRIBUTE); |
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286 idAttr.setValue(id); |
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287 attributes.setNamedItem(idAttr); |
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288 } |
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289 |
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290 if (template_ !is null) { |
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291 Attr name= document.createAttribute(NAME_ATTRIBUTE); |
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292 name.setValue(template_.getName()); |
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293 attributes.setNamedItem(name); |
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294 } |
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295 |
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296 if (template_ !is null) { |
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297 Attr description= document.createAttribute(DESCRIPTION_ATTRIBUTE); |
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298 description.setValue(template_.getDescription()); |
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299 attributes.setNamedItem(description); |
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300 } |
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301 |
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302 if (template_ !is null) { |
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303 Attr context= document.createAttribute(CONTEXT_ATTRIBUTE); |
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304 context.setValue(template_.getContextTypeId()); |
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305 attributes.setNamedItem(context); |
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306 } |
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307 |
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308 Attr enabled= document.createAttribute(ENABLED_ATTRIBUTE); |
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309 enabled.setValue(data.isEnabled() ? Boolean.toString(true) : Boolean.toString(false)); |
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310 attributes.setNamedItem(enabled); |
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311 |
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312 Attr deleted= document.createAttribute(DELETED_ATTRIBUTE); |
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313 deleted.setValue(data.isDeleted() ? Boolean.toString(true) : Boolean.toString(false)); |
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314 attributes.setNamedItem(deleted); |
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315 |
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316 if (template_ !is null) { |
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317 Attr autoInsertable= document.createAttribute(AUTO_INSERTABLE_ATTRIBUTE); |
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318 autoInsertable.setValue(template_.isAutoInsertable() ? Boolean.toString(true) : Boolean.toString(false)); |
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319 attributes.setNamedItem(autoInsertable); |
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320 } |
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321 |
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322 if (template_ !is null) { |
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323 Text pattern= document.createTextNode(template_.getPattern()); |
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324 node.appendChild(pattern); |
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325 } |
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326 } |
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327 |
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328 |
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329 Transformer transformer=TransformerFactory.newInstance().newTransformer(); |
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330 transformer.setOutputProperty(OutputKeys.METHOD, "xml"); //$NON-NLS-1$ |
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331 transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8"); //$NON-NLS-1$ |
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332 DOMSource source = new DOMSource(document); |
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333 |
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334 transformer.transform(source, result); |
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335 |
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336 } catch (ParserConfigurationException e) { |
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337 Assert.isTrue(false); |
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338 } catch (TransformerException e) { |
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339 if (cast(IOException)e.getException() ) |
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340 throw cast(IOException) e.getException(); |
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341 Assert.isTrue(false); |
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342 } |
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343 } |
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344 |
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345 private bool getBooleanValue(NamedNodeMap attributes, String attribute, bool defaultValue) { |
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346 Node enabledNode= attributes.getNamedItem(attribute); |
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347 if (enabledNode is null) |
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348 return defaultValue; |
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349 else if (enabledNode.getNodeValue().equals(Boolean.toString(true))) |
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350 return true; |
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351 else if (enabledNode.getNodeValue().equals(Boolean.toString(false))) |
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352 return false; |
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353 else |
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354 throw new SAXException(TemplatePersistenceMessages.getString("TemplateReaderWriter.error.illegal_boolean_attribute")); //$NON-NLS-1$ |
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355 } |
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356 |
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357 private String getStringValue(NamedNodeMap attributes, String name) { |
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358 String val= getStringValue(attributes, name, null); |
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359 if (val is null) |
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360 throw new SAXException(TemplatePersistenceMessages.getString("TemplateReaderWriter.error.missing_attribute")); //$NON-NLS-1$ |
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361 return val; |
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362 } |
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363 |
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364 private String getStringValue(NamedNodeMap attributes, String name, String defaultValue) { |
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365 Node node= attributes.getNamedItem(name); |
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366 return node is null ? defaultValue : node.getNodeValue(); |
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367 } |
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368 |
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369 private String translateString(String str, ResourceBundle bundle) { |
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370 if (bundle is null) |
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371 return str; |
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372 |
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373 int idx= str.indexOf('%'); |
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374 if (idx is -1) { |
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375 return str; |
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376 } |
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377 StringBuffer buf= new StringBuffer(); |
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378 int k= 0; |
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379 while (idx !is -1) { |
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380 buf.append(str.substring(k, idx)); |
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381 for (k= idx + 1; k < str.length() && !Character.isWhitespace(str.charAt(k)); k++) { |
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382 // loop |
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383 } |
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384 String key= str.substring(idx + 1, k); |
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385 buf.append(getBundleString(key, bundle)); |
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386 idx= str.indexOf('%', k); |
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387 } |
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388 buf.append(str.substring(k)); |
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389 return buf.toString(); |
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390 } |
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391 |
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392 private String getBundleString(String key, ResourceBundle bundle) { |
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393 if (bundle !is null) { |
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394 try { |
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395 return bundle.getString(key); |
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396 } catch (MissingResourceException e) { |
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397 return '!' + key + '!'; |
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398 } |
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399 } |
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400 return TemplatePersistenceMessages.getString(key); // default messages |
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401 } |
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402 ++/ |
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403 } |
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404 |