Mercurial > dive4elements > river

annotate gwt-client/src/main/java/org/dive4elements/river/client/server/meta/Converter.java @ 9801:1d7a72a50183 3.2.x tip

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Assume Compose V2, consistently
author Tom Gottfried <tom@intevation.de>
date Thu, 23 Nov 2023 10:14:13 +0100
parents 0a5239a1e46e
children
rev   line source
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.client.server.meta;
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10
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11 import org.w3c.dom.Document;
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12 import org.w3c.dom.Element;
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13 import org.w3c.dom.Node;
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14 import org.w3c.dom.NodeList;
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15 import org.w3c.dom.Attr;
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16 import org.w3c.dom.NamedNodeMap;
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17
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18 import org.apache.logging.log4j.Logger;
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19 import org.apache.logging.log4j.LogManager;
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20
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21 import org.dive4elements.river.client.shared.model.DataCageTree;
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22 import org.dive4elements.river.client.shared.model.DataCageNode;
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23 import org.dive4elements.river.client.shared.model.AttrList;
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24
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25 import java.util.ArrayList;
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26 import java.util.Map;
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27 import java.util.HashMap;
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28
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29 import org.dive4elements.artifacts.common.utils.XMLUtils;
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30
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31 /**
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32 * Converts document parts (meta-data xml) to datacagenodes/trees,
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33 * which are shown in datacage widgets.
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34 */
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35 public class Converter
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36 {
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37 private static final Logger log = LogManager.getLogger(Converter.class);
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38
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39
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40 public interface NodeConverter
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41 {
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42 DataCageNode convert(Element node, Converter converter);
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43
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44 } // interface NodeConverter
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45
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46 public static class NameConverter implements NodeConverter {
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47 public DataCageNode convert(Element node, Converter converter) {
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48 //System.err.println("NameConverter called");
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49 DataCageNode out = new DataCageNode(
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50 node.getAttribute("name"),
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51 toAttrList(node.getAttributes()));
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52 converter.convertChildren(out, node);
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53 return out;
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54 }
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55 } // class NameConverter
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56
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57 public static class I18NConverter implements NodeConverter {
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58 public DataCageNode convert(Element node, Converter converter) {
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59 //System.err.println("I18NConverter called");
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60
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61 String name = node.getLocalName();
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62 String desc = node.hasAttribute("description")
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63 ? node.getAttribute("description")
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64 : "${" + name + "}";
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65
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66 DataCageNode out =
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67 new DataCageNode(name, desc, toAttrList(node.getAttributes()));
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68
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69 converter.convertChildren(out, node);
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70 return out;
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71 }
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72 } // I18NConverter
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73
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74 private static Map<String, NodeConverter> converters =
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75 new HashMap<String, NodeConverter>();
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76
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77 public static final NodeConverter NAME_CONVERTER = new NameConverter();
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78 public static final NodeConverter I18N_CONVERTER = new I18NConverter();
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80 static {
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81 converters.put("river", NAME_CONVERTER);
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82 converters.put("gauge", NAME_CONVERTER);
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83 converters.put("historical", NAME_CONVERTER);
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84 converters.put("column", NAME_CONVERTER);
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85 }
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86
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87
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88 /** Trivial constructor. */
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89 public Converter() {
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90 }
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91
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92
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93 public DataCageTree convert(Document document) {
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94 log.debug("convert called");
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95
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96 if (log.isDebugEnabled()) {
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97 log.debug(XMLUtils.toString(document));
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98 }
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99
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100 ArrayList<DataCageNode> roots = new ArrayList<DataCageNode>();
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101 NodeList nodes = document.getChildNodes();
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102 for (int i = 0, N = nodes.getLength(); i < N; ++i) {
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103 Node node = nodes.item(i);
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104 if (node.getNodeType() == Node.ELEMENT_NODE) {
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105 Element ele = (Element)node;
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106 roots.add(convertElement(ele));
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107 }
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108 }
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109 return roots.isEmpty()
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110 ? new DataCageTree()
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111 : new DataCageTree(roots.get(0));
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112 }
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113
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114 protected void convertChildren(DataCageNode parent, Element sub) {
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115 //System.err.println("convertChildren called");
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116 NodeList children = sub.getChildNodes();
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117 for (int i = 0, N = children.getLength(); i < N; ++i) {
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118 Node child = children.item(i);
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119 if (child.getNodeType() == Node.ELEMENT_NODE) {
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120 Element childele = (Element)child;
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121 parent.addChild(convertElement(childele));
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122
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123 if (childele.hasAttribute("description"))
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124 log.debug("nwd: " + childele.getAttribute("description"));
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125 }
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126 } // for all children
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127 }
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128
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129 private DataCageNode convertElement(Element element) {
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130 String name = element.getLocalName();
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131
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132 log.debug("search for name: " + name);
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133
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134 NodeConverter converter = converters.get(name);
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135 if (converter == null) {
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136 converter = I18N_CONVERTER;
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137 }
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138 return converter.convert(element, this);
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139
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140 }
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141
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142
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143 /**
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144 * Creates key/value pairs from Nodes Attributes.
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145 */
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146 public static AttrList toAttrList(NamedNodeMap nodeMap) {
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147 if (nodeMap == null) {
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148 return null;
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149 }
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150 int N = nodeMap.getLength();
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151
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152 if (N == 0) {
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153 return null;
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154 }
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155
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156 AttrList result = new AttrList(N);
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157
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158 for (int i = 0; i < N; ++i) {
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159 Node node = nodeMap.item(i);
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160 if (node.getNodeType() == Node.ATTRIBUTE_NODE) {
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161 Attr attr = (Attr)node;
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162 String key = attr.getName();
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163 String value = attr.getValue();
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164 result.add(key, value);
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165 }
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166 }
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167
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168 return result;
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169 }
286
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170 }
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171 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org