Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/DistanceInfoService.java @ 697:b972eba2ed8a facets-slt
Removed ComputeCallback because this was thought too complicated. Fixed issue with facets not be re-generated if same state is entered again.
flys-artifacts/branches/facets-slt@2143 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Fri, 17 Jun 2011 10:40:54 +0000 |
parents | 3dc61e00385e |
children | eab5e5089d77 |
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 |
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16 import de.intevation.artifactdatabase.DefaultService; |
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17 |
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18 import de.intevation.flys.backend.SessionHolder; |
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19 import de.intevation.flys.model.Annotation; |
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20 import de.intevation.flys.model.Attribute; |
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21 import de.intevation.flys.model.Position; |
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22 import de.intevation.flys.model.Range; |
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23 import de.intevation.flys.model.Edge; |
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24 |
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25 import de.intevation.flys.artifacts.model.AnnotationsFactory; |
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26 |
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27 import org.hibernate.Session; |
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28 |
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29 import de.intevation.flys.artifacts.cache.CacheFactory; |
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30 |
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31 import net.sf.ehcache.Cache; |
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32 |
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33 /** |
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34 * This service provides information about distances of a specified river. |
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35 * |
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36 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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37 */ |
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38 public class DistanceInfoService extends DefaultService { |
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39 |
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40 /** The logger used in this service.*/ |
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41 private static Logger logger = Logger.getLogger(DistanceInfoService.class); |
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42 |
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43 public static final String CACHE_NAME = "service-distanceinfo"; |
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44 |
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45 public static final String RIVER_XPATH = "/art:river/text()"; |
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46 |
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47 |
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48 /** |
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49 * The default constructor. |
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50 */ |
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51 public DistanceInfoService() { |
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52 } |
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53 |
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54 |
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55 public Document process( |
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56 Document data, |
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57 Object globalContext, |
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58 CallMeta callMeta) |
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59 { |
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60 logger.debug("DistanceInfoService.process"); |
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61 |
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62 String river = XMLUtils.xpathString( |
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63 data, RIVER_XPATH, ArtifactNamespaceContext.INSTANCE); |
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64 |
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65 if (river == null || (river = river.trim()).length() == 0) { |
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66 logger.warn("No river specified. Cannot return distance info!"); |
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67 return XMLUtils.newDocument(); |
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68 } |
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69 |
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70 logger.debug("Search distances for river: " + river); |
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71 |
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72 Cache cache = CacheFactory.getCache(CACHE_NAME); |
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73 |
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74 if (cache == null) { |
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75 logger.debug("no cache configured for distance info"); |
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76 return getUncached(river); |
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77 } |
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78 |
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79 net.sf.ehcache.Element element = cache.get(river); |
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80 |
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81 if (element != null) { |
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82 logger.debug("distance info found in cache"); |
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83 return (Document)element.getValue(); |
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84 } |
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85 |
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86 Document result = getUncached(river); |
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87 |
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88 element = new net.sf.ehcache.Element(river, result); |
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89 |
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90 logger.debug("store distance info found into cache"); |
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91 |
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92 cache.put(element); |
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93 |
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94 return result; |
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95 } |
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96 |
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97 protected Document getUncached(String river) { |
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98 |
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99 Document result = XMLUtils.newDocument(); |
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100 |
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101 Session session = SessionHolder.acquire(); |
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102 |
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103 try { |
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104 Iterator<Annotation> iter = |
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105 AnnotationsFactory.getAnnotationsIterator(river); |
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106 |
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107 Element all = result.createElement("distances"); |
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108 |
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109 while (iter.hasNext()) { |
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110 Annotation a = iter.next(); |
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111 Element distance = buildDistanceNode(result, a); |
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112 all.appendChild(distance); |
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113 } |
314
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114 |
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115 result.appendChild(all); |
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116 } |
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117 finally { |
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118 session.close(); |
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119 SessionHolder.release(); |
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120 } |
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121 |
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122 return result; |
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123 } |
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124 |
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125 |
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126 /** |
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127 * This method build an Element for a distance info. |
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128 * |
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129 * @param ec The ElementCreator. |
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130 * @param anno The Annotation that provides information about the distance. |
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131 * |
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132 * @return an Element that contains information about a distance. |
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133 */ |
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134 protected static Element buildDistanceNode( |
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135 Document document, |
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136 Annotation anno |
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137 ) { |
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138 Position pos = anno.getPosition(); |
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139 Range range = anno.getRange(); |
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140 Attribute attr = anno.getAttribute(); |
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141 Edge edge = anno.getEdge(); |
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142 BigDecimal a = range.getA(); |
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143 BigDecimal b = range.getB(); |
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144 |
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145 Element distance = document.createElement("distance"); |
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146 |
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147 distance.setAttribute("description", pos.getValue()); |
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148 |
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149 String riverSide = attr.getValue(); |
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150 |
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151 if (riverSide != null && riverSide.length() > 0) { |
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152 distance.setAttribute("riverside", riverSide); |
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153 } |
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154 |
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155 if (a != null) { |
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156 distance.setAttribute("from", a.toString()); |
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157 } |
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158 if (b != null) { |
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159 distance.setAttribute("to", b.toString()); |
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160 } |
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161 if (edge != null) { |
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162 BigDecimal bottom = edge.getBottom(); |
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163 BigDecimal top = edge.getTop(); |
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164 if (bottom != null) { |
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165 distance.setAttribute("bottom", bottom.toString()); |
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166 } |
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167 if (top != null) { |
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168 distance.setAttribute("top", top.toString()); |
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169 } |
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170 } |
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171 |
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172 return distance; |
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173 } |
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174 } |
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175 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |