Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/DistanceInfoService.java @ 680:bcd62609c936
Write top 'Oberkante' and bottom 'Unterkante' to out going XML if they exist.
flys-artifacts/trunk@2109 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Tue, 14 Jun 2011 13:53:25 +0000 |
parents | 02c0cce0e469 |
children | 8a9456d5a081 |
rev | line source |
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1 package de.intevation.flys.artifacts.services; |
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2 |
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3 import java.math.BigDecimal; |
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4 import java.util.Iterator; |
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5 |
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6 import org.apache.log4j.Logger; |
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7 |
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8 import org.w3c.dom.Document; |
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9 import org.w3c.dom.Element; |
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10 |
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11 import de.intevation.artifacts.CallMeta; |
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12 |
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13 import de.intevation.artifacts.common.ArtifactNamespaceContext; |
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14 import de.intevation.artifacts.common.utils.XMLUtils; |
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15 import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator; |
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16 |
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17 import de.intevation.artifactdatabase.DefaultService; |
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18 |
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19 import de.intevation.flys.backend.SessionHolder; |
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20 import de.intevation.flys.model.Annotation; |
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21 import de.intevation.flys.model.Attribute; |
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22 import de.intevation.flys.model.Position; |
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23 import de.intevation.flys.model.Range; |
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24 import de.intevation.flys.model.Edge; |
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25 |
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26 import de.intevation.flys.artifacts.model.AnnotationsFactory; |
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27 |
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28 import org.hibernate.Session; |
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29 |
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30 import de.intevation.flys.artifacts.cache.CacheFactory; |
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31 |
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32 import net.sf.ehcache.Cache; |
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33 |
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34 /** |
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35 * This service provides information about distances of a specified river. |
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36 * |
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37 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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38 */ |
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39 public class DistanceInfoService extends DefaultService { |
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40 |
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41 /** The logger used in this service.*/ |
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42 private static Logger logger = Logger.getLogger(DistanceInfoService.class); |
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43 |
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44 public static final String CACHE_NAME = "service-distanceinfo"; |
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45 |
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46 public static final String RIVER_XPATH = "/art:river/text()"; |
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47 |
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48 |
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49 /** |
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50 * The default constructor. |
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51 */ |
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52 public DistanceInfoService() { |
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53 } |
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54 |
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55 |
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56 public Document process( |
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57 Document data, |
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58 Object globalContext, |
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59 CallMeta callMeta) |
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60 { |
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61 logger.debug("DistanceInfoService.process"); |
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62 |
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63 String river = XMLUtils.xpathString( |
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64 data, RIVER_XPATH, ArtifactNamespaceContext.INSTANCE); |
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65 |
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66 if (river == null || (river = river.trim()).length() == 0) { |
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67 logger.warn("No river specified. Cannot return distance info!"); |
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68 return XMLUtils.newDocument(); |
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69 } |
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70 |
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71 logger.debug("Search distances for river: " + river); |
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72 |
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73 Cache cache = CacheFactory.getCache(CACHE_NAME); |
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74 |
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75 if (cache == null) { |
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76 logger.debug("no cache configured for distance info"); |
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77 return getUncached(river); |
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78 } |
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79 |
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80 net.sf.ehcache.Element element = cache.get(river); |
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81 |
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82 if (element != null) { |
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83 logger.debug("distance info found in cache"); |
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84 return (Document)element.getValue(); |
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85 } |
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86 |
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87 Document result = getUncached(river); |
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88 |
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89 element = new net.sf.ehcache.Element(river, result); |
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90 |
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91 logger.debug("store distance info found into cache"); |
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92 |
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93 cache.put(element); |
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94 |
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95 return result; |
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96 } |
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97 |
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98 protected Document getUncached(String river) { |
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99 |
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100 Document result = XMLUtils.newDocument(); |
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101 |
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102 ElementCreator ec = new ElementCreator( |
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103 result, |
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104 ArtifactNamespaceContext.NAMESPACE_URI, |
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105 ArtifactNamespaceContext.NAMESPACE_PREFIX); |
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106 |
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107 Session session = SessionHolder.acquire(); |
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108 |
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109 try { |
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110 Iterator<Annotation> iter = |
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111 AnnotationsFactory.getAnnotationsIterator(river); |
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112 |
314
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113 Element all = ec.create("distances"); |
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114 |
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115 while (iter.hasNext()) { |
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116 Annotation a = iter.next(); |
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117 Element distance = buildDistanceNode(ec, a); |
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118 all.appendChild(distance); |
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119 } |
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120 |
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121 result.appendChild(all); |
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122 } |
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123 finally { |
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124 session.close(); |
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125 SessionHolder.release(); |
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126 } |
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127 |
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128 return result; |
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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 * This method build an Element for a distance info. |
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134 * |
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135 * @param ec The ElementCreator. |
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136 * @param anno The Annotation that provides information about the distance. |
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137 * |
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138 * @return an Element that contains information about a distance. |
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139 */ |
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140 protected static Element buildDistanceNode(ElementCreator ec, Annotation anno) { |
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141 Position pos = anno.getPosition(); |
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142 Range range = anno.getRange(); |
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143 Attribute attr = anno.getAttribute(); |
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144 Edge edge = anno.getEdge(); |
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145 |
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146 BigDecimal a = range.getA(); |
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147 BigDecimal b = range.getB(); |
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148 |
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149 Element distance = ec.create("distance"); |
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150 ec.addAttr(distance, "description", pos.getValue(), true); |
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151 ec.addAttr(distance, "riverside", attr.getValue(), true); |
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152 |
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153 if (a != null) { |
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154 ec.addAttr(distance, "from", a.toString(), true); |
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155 } |
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156 if (b != null) { |
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157 ec.addAttr(distance, "to", b.toString(), true); |
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158 } |
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159 if (edge != null) { |
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160 BigDecimal bottom = edge.getBottom(); |
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161 BigDecimal top = edge.getTop(); |
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162 if (bottom != null) { |
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163 ec.addAttr(distance, "bottom", bottom.toString(), true); |
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164 } |
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165 if (top != null) { |
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166 ec.addAttr(distance, "top", top.toString(), true); |
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167 } |
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168 } |
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169 |
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170 return distance; |
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171 } |
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172 } |
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173 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |