Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/DistanceInfoService.java @ 680:bcd62609c936

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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>
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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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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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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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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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
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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
680
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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 :
http://dive4elements.wald.intevation.org