Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/meta/Builder.java @ 415:7c018f466d6d
Datacage: Added river parameter to meta data services.
flys-artifacts/trunk@1879 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Tue, 10 May 2011 12:43:12 +0000 |
parents | df02137b3b28 |
children | c09c9e05ecfa |
rev | line source |
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1 package de.intevation.flys.artifacts.services.meta; |
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2 |
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3 import java.util.regex.Matcher; |
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4 |
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5 import java.util.ArrayList; |
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6 import java.util.List; |
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7 import java.util.HashMap; |
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8 import java.util.Map; |
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9 |
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10 import org.w3c.dom.Document; |
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11 import org.w3c.dom.NodeList; |
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12 import org.w3c.dom.Node; |
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13 import org.w3c.dom.Element; |
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14 |
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15 import java.sql.SQLException; |
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16 import java.sql.Connection; |
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17 |
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18 import de.intevation.artifacts.common.utils.XMLUtils; |
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19 |
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20 import org.apache.log4j.Logger; |
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21 |
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22 public class Builder |
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23 { |
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24 private static Logger log = Logger.getLogger(Builder.class); |
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25 |
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26 public static final String DC_NAMESPACE_URI = |
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27 "http://www.intevation.org/2011/Datacage"; |
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28 |
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29 protected Document template; |
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30 |
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31 public class BuildHelper |
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32 { |
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33 protected Document output; |
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34 protected StackFrames frames; |
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35 protected Connection connection; |
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36 protected Map<String, CompiledStatement> statements; |
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37 |
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38 public BuildHelper( |
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39 Document output, |
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40 Connection connection, |
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41 Map<String, Object> parameters |
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42 ) { |
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43 this.output = output; |
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44 this.connection = connection; |
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45 frames = new StackFrames(parameters); |
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46 statements = new HashMap<String, CompiledStatement>(); |
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47 } |
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48 |
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49 public void build(List<Node> elements) throws SQLException { |
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50 try { |
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51 for (Node current: elements) { |
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52 build(output, current); |
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53 } |
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54 } |
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55 finally { |
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56 for (CompiledStatement cs: statements.values()) { |
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57 cs.close(); |
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58 } |
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59 statements.clear(); |
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60 } |
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61 } |
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62 |
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63 protected void context(Node parent, Element current) |
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64 throws SQLException |
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65 { |
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66 NodeList elements = current.getElementsByTagNameNS( |
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67 DC_NAMESPACE_URI, "elements"); |
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68 |
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69 if (elements.getLength() < 1) { |
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70 log.warn("no elements found -> ignore"); |
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71 return; |
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72 } |
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73 |
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74 NodeList subs = elements.item(0).getChildNodes(); |
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75 int S = subs.getLength(); |
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76 |
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77 if (S < 1) { |
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78 log.warn("elements is empty -> ignore"); |
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79 return; |
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80 } |
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81 |
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82 NodeList stmntNode = current.getElementsByTagNameNS( |
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83 DC_NAMESPACE_URI, "statement"); |
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84 |
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85 if (stmntNode.getLength() < 1) { |
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86 log.warn("dc:context: too less statements"); |
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87 return; |
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88 } |
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89 |
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90 String stmntText = stmntNode.item(0).getTextContent(); |
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91 |
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92 if (stmntText == null |
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93 || (stmntText = stmntText.trim()).length() == 0) { |
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94 log.warn("dc:context: no sql statement found -> ignored"); |
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95 return; |
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96 } |
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97 |
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98 CompiledStatement cs = statements.get(stmntText); |
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99 |
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100 if (cs == null) { |
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101 cs = new CompiledStatement(stmntText); |
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102 statements.put(stmntText, cs); |
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103 } |
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104 |
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105 ResultData rd = cs.execute(connection, frames); |
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106 |
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107 String [] columns = rd.getColumnLabels(); |
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108 |
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109 |
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110 for (Object [] row: rd.getRows()) { |
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111 frames.enter(); |
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112 try { |
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113 frames.put(columns, row); |
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114 for (int i = 0; i < S; ++i) { |
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115 build(parent, subs.item(i)); |
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116 } |
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117 } |
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118 finally { |
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119 frames.leave(); |
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120 } |
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121 } |
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122 } |
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123 |
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124 protected void element(Node parent, Element current) |
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|
125 throws SQLException |
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parents:
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|
126 { |
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|
127 String attr = expand(current.getAttribute("name")); |
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|
128 |
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|
129 if (log.isDebugEnabled()) { |
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130 log.debug("dc:element -> '" + attr + "'"); |
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|
131 } |
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|
132 |
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|
133 if (attr.length() == 0) { |
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Added meta data service.
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|
134 log.warn("no name attribute found"); |
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|
135 return; |
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parents:
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|
136 } |
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Added meta data service.
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|
137 |
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|
138 Element element = output.createElement(attr); |
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139 |
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140 NodeList children = current.getChildNodes(); |
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Added meta data service.
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|
141 for (int i = 0, N = children.getLength(); i < N; ++i) { |
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|
142 build(element, children.item(i)); |
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|
143 } |
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|
144 |
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|
145 parent.appendChild(element); |
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parents:
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|
146 } |
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Added meta data service.
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147 |
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148 protected void text(Node parent, Element current) |
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|
149 throws SQLException |
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Added meta data service.
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parents:
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|
150 { |
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|
151 log.debug("dc:text"); |
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Added meta data service.
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152 String value = expand(current.getTextContent()); |
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153 parent.appendChild(output.createTextNode(value)); |
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Added meta data service.
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|
154 } |
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|
155 |
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|
156 |
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Added meta data service.
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|
157 protected void attribute(Node parent, Element current) { |
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Added meta data service.
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158 |
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|
159 if (parent.getNodeType() != Node.ELEMENT_NODE) { |
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|
160 log.warn("need element here"); |
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|
161 return; |
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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|
162 } |
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Added meta data service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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|
163 |
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|
164 String name = expand(current.getAttribute("name")); |
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|
165 String value = expand(current.getAttribute("value")); |
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|
166 |
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|
167 Element element = (Element)parent; |
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|
168 |
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|
169 element.setAttribute(name, value); |
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|
170 } |
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171 |
415
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410
diff
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|
172 protected void convert(Node parent, Element current) { |
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173 |
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|
174 String variable = expand(current.getAttribute("var")); |
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|
175 String type = expand(current.getAttribute("type")); |
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176 |
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410
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|
177 if (frames.containsKey(variable)) { |
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Datacage: Added river parameter to meta data services.
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diff
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|
178 Object object = TypeConverter.convert( |
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diff
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|
179 frames.get(variable), |
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|
180 type); |
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410
diff
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|
181 frames.put(variable, object); |
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|
182 } |
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diff
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|
183 } |
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410
diff
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|
184 |
372
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|
185 protected String expand(String s) { |
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Added meta data service.
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186 Matcher m = CompiledStatement.VAR.matcher(s); |
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|
187 |
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|
188 StringBuffer sb = new StringBuffer(); |
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|
189 while (m.find()) { |
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|
190 String key = m.group(1); |
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|
191 Object value = frames.get(key); |
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|
192 m.appendReplacement(sb, value != null ? value.toString() : ""); |
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|
193 } |
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|
194 m.appendTail(sb); |
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|
195 return sb.toString(); |
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parents:
diff
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|
196 } |
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Added meta data service.
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|
197 |
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Added meta data service.
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parents:
diff
changeset
|
198 protected void build(Node parent, Node current) |
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|
199 throws SQLException |
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
200 { |
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Added meta data service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
201 String ns = current.getNamespaceURI(); |
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Added meta data service.
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parents:
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|
202 if (ns != null && ns.equals(DC_NAMESPACE_URI)) { |
fc3cf0ef777e
Added meta data service.
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parents:
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|
203 if (current.getNodeType() != Node.ELEMENT_NODE) { |
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Added meta data service.
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|
204 log.warn("need elements here"); |
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Added meta data service.
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parents:
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|
205 } |
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Added meta data service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
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|
206 else { |
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Added meta data service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
207 String localName = current.getLocalName(); |
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Added meta data service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
208 if ("context".equals(localName)) { |
fc3cf0ef777e
Added meta data service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
209 context(parent, (Element)current); |
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Added meta data service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
210 } |
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Added meta data service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
211 else if ("attribute".equals(localName)) { |
fc3cf0ef777e
Added meta data service.
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parents:
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changeset
|
212 attribute(parent, (Element)current); |
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Added meta data service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
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|
213 } |
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Added meta data service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
214 else if ("element".equals(localName)) { |
fc3cf0ef777e
Added meta data service.
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parents:
diff
changeset
|
215 element(parent, (Element)current); |
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Added meta data service.
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parents:
diff
changeset
|
216 } |
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Added meta data service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
217 else if ("text".equals(localName)) { |
fc3cf0ef777e
Added meta data service.
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|
218 text(parent, (Element)current); |
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Added meta data service.
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parents:
diff
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|
219 } |
415
7c018f466d6d
Datacage: Added river parameter to meta data services.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
410
diff
changeset
|
220 else if ("convert".equals(localName)) { |
7c018f466d6d
Datacage: Added river parameter to meta data services.
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parents:
410
diff
changeset
|
221 convert(parent, (Element)current); |
7c018f466d6d
Datacage: Added river parameter to meta data services.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
410
diff
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|
222 } |
372
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Added meta data service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
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|
223 else { |
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Added meta data service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
224 log.warn("unknown '" + localName + "' -> ignore"); |
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Added meta data service.
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parents:
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|
225 } |
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Added meta data service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
226 } |
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Added meta data service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
227 return; |
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Added meta data service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
228 } |
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Added meta data service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
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|
229 |
410
df02137b3b28
Datacage service: Cleanup served XML document.
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parents:
372
diff
changeset
|
230 if (current.getNodeType() == Node.TEXT_NODE) { |
df02137b3b28
Datacage service: Cleanup served XML document.
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parents:
372
diff
changeset
|
231 String txt = current.getNodeValue(); |
df02137b3b28
Datacage service: Cleanup served XML document.
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parents:
372
diff
changeset
|
232 if (txt != null && txt.trim().length() == 0) { |
df02137b3b28
Datacage service: Cleanup served XML document.
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parents:
372
diff
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|
233 return; |
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Datacage service: Cleanup served XML document.
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parents:
372
diff
changeset
|
234 } |
df02137b3b28
Datacage service: Cleanup served XML document.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
372
diff
changeset
|
235 } |
df02137b3b28
Datacage service: Cleanup served XML document.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
372
diff
changeset
|
236 |
372
fc3cf0ef777e
Added meta data service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
237 Node copy = output.importNode(current, false); |
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Added meta data service.
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parents:
diff
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|
238 |
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Added meta data service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
239 NodeList children = current.getChildNodes(); |
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Added meta data service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
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|
240 for (int i = 0, N = children.getLength(); i < N; ++i) { |
fc3cf0ef777e
Added meta data service.
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parents:
diff
changeset
|
241 build(copy, children.item(i)); |
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Added meta data service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
242 } |
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Added meta data service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
243 parent.appendChild(copy); |
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Added meta data service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
244 } |
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Added meta data service.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
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|
245 } // class BuildHelper |
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Added meta data service.
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parents:
diff
changeset
|
246 |
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247 |
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248 public Builder() { |
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249 } |
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250 |
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251 public Builder(Document template) { |
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252 this.template = template; |
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253 } |
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254 |
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255 public Document build(Connection connection) |
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256 throws SQLException |
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257 { |
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258 return build(connection, XMLUtils.newDocument(), null); |
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259 } |
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260 |
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261 public Document build( |
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262 Connection connection, |
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263 Document output, |
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264 Map<String, Object> parameters |
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265 ) |
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266 throws SQLException |
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267 { |
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268 NodeList roots = template.getElementsByTagNameNS( |
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269 DC_NAMESPACE_URI, "template"); |
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270 |
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271 BuildHelper helper = new BuildHelper(output, connection, parameters); |
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272 |
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273 List<Node> elements = new ArrayList<Node>(); |
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274 |
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275 for (int i = 0, N = roots.getLength(); i < N; ++i) { |
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276 NodeList rootChildren = roots.item(i).getChildNodes(); |
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277 for (int j = 0, M = rootChildren.getLength(); j < M; ++j) { |
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278 Node child = rootChildren.item(j); |
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279 if (child.getNodeType() == Node.ELEMENT_NODE) { |
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280 elements.add(child); |
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281 } |
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282 } |
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283 } |
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284 helper.build(elements); |
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285 |
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286 return output; |
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287 } |
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288 } |
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289 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |