Mercurial > dive4elements > river
annotate flys-client/src/main/java/de/intevation/flys/client/server/meta/Converter.java @ 4704:115afdaf3e85
Changed naming of variables (i & j -> i & k) for readability.
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Wed, 19 Dec 2012 11:35:51 +0100 |
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1 package de.intevation.flys.client.server.meta; |
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2 |
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3 import org.w3c.dom.Document; |
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4 import org.w3c.dom.Element; |
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5 import org.w3c.dom.Node; |
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6 import org.w3c.dom.NodeList; |
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7 import org.w3c.dom.Attr; |
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8 import org.w3c.dom.NamedNodeMap; |
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9 |
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10 import org.apache.log4j.Logger; |
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11 |
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12 import de.intevation.flys.client.shared.model.DataCageTree; |
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13 import de.intevation.flys.client.shared.model.DataCageNode; |
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14 import de.intevation.flys.client.shared.model.AttrList; |
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15 |
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16 import java.util.ArrayList; |
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17 import java.util.Map; |
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18 import java.util.HashMap; |
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19 |
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20 import de.intevation.artifacts.common.utils.XMLUtils; |
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21 |
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22 /** |
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23 * Converts document parts (meta-data xml) to datacagenodes/trees, |
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24 * which are shown in datacage widgets. |
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25 */ |
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26 public class Converter |
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27 { |
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28 private static final Logger logger = Logger.getLogger(Converter.class); |
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29 |
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30 |
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31 public interface NodeConverter |
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32 { |
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33 DataCageNode convert(Element node, Converter converter); |
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34 |
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35 } // interface NodeConverter |
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36 |
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37 public static class NameConverter implements NodeConverter { |
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38 public DataCageNode convert(Element node, Converter converter) { |
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39 //System.err.println("NameConverter called"); |
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40 DataCageNode out = new DataCageNode( |
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41 node.getAttribute("name"), |
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42 toAttrList(node.getAttributes())); |
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43 converter.convertChildren(out, node); |
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44 return out; |
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45 } |
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46 } // class NameConverter |
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47 |
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48 public static class I18NConverter implements NodeConverter { |
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49 public DataCageNode convert(Element node, Converter converter) { |
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50 //System.err.println("I18NConverter called"); |
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51 |
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52 String name = node.getLocalName(); |
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53 String desc = node.hasAttribute("description") |
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54 ? node.getAttribute("description") |
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55 : "${" + name + "}"; |
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56 |
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57 DataCageNode out = |
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58 new DataCageNode(name, desc, toAttrList(node.getAttributes())); |
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59 |
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60 converter.convertChildren(out, node); |
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61 return out; |
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62 } |
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63 } // I18NConverter |
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64 |
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65 private static Map<String, NodeConverter> converters = new HashMap<String, NodeConverter>(); |
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66 |
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67 public static final NodeConverter NAME_CONVERTER = new NameConverter(); |
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68 public static final NodeConverter I18N_CONVERTER = new I18NConverter(); |
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69 |
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70 static { |
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71 converters.put("river", NAME_CONVERTER); |
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72 converters.put("gauge", NAME_CONVERTER); |
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73 converters.put("historical", NAME_CONVERTER); |
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74 converters.put("column", NAME_CONVERTER); |
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75 } |
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76 |
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77 |
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78 /** Trivial constructor. */ |
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79 public Converter() { |
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80 } |
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81 |
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82 |
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83 public DataCageTree convert(Document document) { |
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84 logger.debug("convert called"); |
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85 |
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86 if (logger.isDebugEnabled()) { |
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87 logger.debug(XMLUtils.toString(document)); |
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88 } |
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89 |
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90 ArrayList<DataCageNode> roots = new ArrayList<DataCageNode>(); |
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91 NodeList nodes = document.getChildNodes(); |
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92 for (int i = 0, N = nodes.getLength(); i < N; ++i) { |
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93 Node node = nodes.item(i); |
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94 if (node.getNodeType() == Node.ELEMENT_NODE) { |
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95 Element ele = (Element)node; |
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96 roots.add(convertElement(ele)); |
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97 } |
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98 } |
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99 return roots.isEmpty() |
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100 ? new DataCageTree() |
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101 : new DataCageTree(roots.get(0)); |
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102 } |
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103 |
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104 protected void convertChildren(DataCageNode parent, Element sub) { |
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105 //System.err.println("convertChildren called"); |
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106 NodeList children = sub.getChildNodes(); |
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107 for (int i = 0, N = children.getLength(); i < N; ++i) { |
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108 Node child = children.item(i); |
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109 if (child.getNodeType() == Node.ELEMENT_NODE) { |
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110 Element childele = (Element)child; |
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111 parent.addChild(convertElement(childele)); |
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112 |
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113 if (childele.hasAttribute("description")) |
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114 logger.debug("nwd: " + childele.getAttribute("description")); |
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115 } |
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116 } // for all children |
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117 } |
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118 |
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119 private DataCageNode convertElement(Element element) { |
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120 String name = element.getLocalName(); |
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121 |
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122 logger.debug("search for name: " + name); |
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123 |
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124 NodeConverter converter = converters.get(name); |
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125 if (converter == null) { |
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126 converter = I18N_CONVERTER; |
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127 } |
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128 return converter.convert(element, this); |
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129 |
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130 } |
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131 |
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132 |
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133 /** |
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134 * Creates key/value pairs from Nodes Attributes. |
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135 */ |
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136 public static AttrList toAttrList(NamedNodeMap nodeMap) { |
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137 if (nodeMap == null) { |
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138 return null; |
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139 } |
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140 int N = nodeMap.getLength(); |
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141 |
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142 if (N == 0) { |
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143 return null; |
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144 } |
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145 |
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146 AttrList result = new AttrList(N); |
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147 |
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148 for (int i = 0; i < N; ++i) { |
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149 Node node = nodeMap.item(i); |
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150 if (node.getNodeType() == Node.ATTRIBUTE_NODE) { |
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151 Attr attr = (Attr)node; |
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152 String key = attr.getName(); |
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153 String value = attr.getValue(); |
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154 result.add(key, value); |
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155 } |
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156 } |
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157 |
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158 return result; |
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159 } |
286
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160 } |
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161 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |