Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/DistanceInfoService.java @ 2089:0da8874bd378

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Added initial state to map artifact to be able to advance and step back. The map artifact overrides describe() to have the complete UI information in the describe response document. flys-artifacts/trunk@3613 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Raimund Renkert <raimund.renkert@intevation.de>
date Fri, 06 Jan 2012 12:02:10 +0000
parents 26e19cdaed5e
children e92bc9b0ca1d
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 import de.intevation.artifacts.GlobalContext;
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13
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14 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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15 import de.intevation.artifacts.common.utils.XMLUtils;
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16
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17 import de.intevation.flys.model.Annotation;
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18 import de.intevation.flys.model.Attribute;
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19 import de.intevation.flys.model.Position;
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20 import de.intevation.flys.model.Range;
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21 import de.intevation.flys.model.Edge;
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22
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23 import de.intevation.flys.artifacts.model.AnnotationsFactory;
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24
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25 import de.intevation.flys.artifacts.cache.CacheFactory;
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26
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27 import net.sf.ehcache.Cache;
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29 /**
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30 * This service provides information about distances of a specified river.
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31 *
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32 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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33 */
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34 public class DistanceInfoService extends FLYSService {
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36 private static enum DistanceFilter {
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37 NONE, LOCATIONS, DISTANCES
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38 }
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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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47 public static final String FILTER_XPATH = "/art:river/art:filter/text()";
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49
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50 /**
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51 * The default constructor.
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52 */
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53 public DistanceInfoService() {
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54 }
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56
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57 @Override
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58 public Document doProcess(
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59 Document data,
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60 GlobalContext globalContext,
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61 CallMeta callMeta
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62 ) {
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63 logger.debug("DistanceInfoService.process");
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64
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65 String river = XMLUtils.xpathString(
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66 data, RIVER_XPATH, ArtifactNamespaceContext.INSTANCE);
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67
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68 String filter = XMLUtils.xpathString(
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69 data, FILTER_XPATH, ArtifactNamespaceContext.INSTANCE);
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70
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71 if (river == null || (river = river.trim()).length() == 0) {
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72 logger.warn("No river specified. Cannot return distance info!");
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73 return XMLUtils.newDocument();
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74 }
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75
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76 logger.debug("Search distances for river: " + river);
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77
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78 Cache cache = CacheFactory.getCache(CACHE_NAME);
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79
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80 if (cache == null) {
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81 logger.debug("no cache configured for distance info");
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82 return getUncached(river, filter);
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83 }
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86 String key = getCacheKey(river, filter);
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87
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88 net.sf.ehcache.Element element = cache.get(key);
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89
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90 if (element != null) {
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91 logger.debug("distance info found in cache");
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92 return (Document)element.getValue();
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93 }
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94
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95 Document result = getUncached(river, filter);
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96
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97 element = new net.sf.ehcache.Element(key, result);
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98
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99 logger.debug("store distance info found into cache");
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100
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101 cache.put(element);
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102
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103 return result;
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104 }
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105
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107 protected String getCacheKey(String river, String filtertype) {
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108 return filtertype != null && filtertype.length() > 0
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109 ? river + "_" + filtertype
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110 : river;
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111 }
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112
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114 protected Document getUncached(String river, String filtertype) {
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115
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116 Document result = XMLUtils.newDocument();
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117
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118 Iterator<Annotation> iter =
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119 AnnotationsFactory.getAnnotationsIterator(river);
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120
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121 Element all = result.createElement("distances");
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122
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123 DistanceFilter filter = getDistanceFilter(filtertype);
314
aeeb9054b7cf Acquire/release sessions in services to avoid db connection leaks.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 301
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124
1631
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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125 while (iter.hasNext()) {
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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126 Annotation a = iter.next();
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127 Element distance = buildDistanceNode(result, a, filter);
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128
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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129 if (distance != null) {
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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130 all.appendChild(distance);
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131 }
301
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132 }
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133
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134 result.appendChild(all);
301
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135
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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136 return result;
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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137 }
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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138
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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139
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 704
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140 protected static DistanceFilter getDistanceFilter(String type) {
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 704
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141 if (type.equals("locations")) {
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 704
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142 logger.debug("Found 'location' filter.");
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 704
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143 return DistanceFilter.LOCATIONS;
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 704
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144 }
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 704
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145 else if (type.equals("distances")) {
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 704
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146 logger.debug("Found 'distances' filter.");
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 704
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147 return DistanceFilter.DISTANCES;
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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148 }
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 704
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149
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 704
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150 logger.debug("Do not use any filter at all.");
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parents: 704
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151
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 704
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152 return DistanceFilter.NONE;
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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153 }
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 704
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154
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 704
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155
301
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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156 /**
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Felix Wolfsteller <felix.wolfsteller@intevation.de>
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157 * Builds an Element for a distance info.
301
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158 *
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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159 * @param anno The Annotation that provides information about the distance.
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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160 *
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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161 * @return an Element that contains information about a distance.
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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162 */
686
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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163 protected static Element buildDistanceNode(
922
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 704
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164 Document document,
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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165 Annotation anno,
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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166 DistanceFilter filter
686
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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167 ) {
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168 Position pos = anno.getPosition();
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169 Range range = anno.getRange();
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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170 Attribute attr = anno.getAttribute();
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171 Edge edge = anno.getEdge();
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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172 BigDecimal a = range.getA();
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173 BigDecimal b = range.getB();
301
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parents:
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174
922
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 704
diff changeset
175 if (b == null && filter == DistanceFilter.DISTANCES) {
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 704
diff changeset
176 return null;
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 704
diff changeset
177 }
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 704
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178
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 704
diff changeset
179 if (b != null && filter == DistanceFilter.LOCATIONS) {
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 704
diff changeset
180 return null;
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 704
diff changeset
181 }
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 704
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182
686
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183 Element distance = document.createElement("distance");
301
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parents:
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184
686
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diff changeset
185 distance.setAttribute("description", pos.getValue());
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186
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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diff changeset
187 String riverSide = attr.getValue();
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188
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 644
diff changeset
189 if (riverSide != null && riverSide.length() > 0) {
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 644
diff changeset
190 distance.setAttribute("riverside", riverSide);
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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191 }
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parents: 644
diff changeset
192
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 644
diff changeset
193 if (a != null) {
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diff changeset
194 distance.setAttribute("from", a.toString());
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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195 }
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 644
diff changeset
196 if (b != null) {
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 644
diff changeset
197 distance.setAttribute("to", b.toString());
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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198 }
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 644
diff changeset
199 if (edge != null) {
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 644
diff changeset
200 BigDecimal bottom = edge.getBottom();
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 644
diff changeset
201 BigDecimal top = edge.getTop();
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 644
diff changeset
202 if (bottom != null) {
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 644
diff changeset
203 distance.setAttribute("bottom", bottom.toString());
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 644
diff changeset
204 }
3dc61e00385e Merged with trunk and introduced hashing of computed values.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 644
diff changeset
205 if (top != null) {
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 644
diff changeset
206 distance.setAttribute("top", top.toString());
3dc61e00385e Merged with trunk and introduced hashing of computed values.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 644
diff changeset
207 }
3dc61e00385e Merged with trunk and introduced hashing of computed values.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 644
diff changeset
208 }
301
1a00cb4998a8 Implemented a service that retrieves distance information for a specific river.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
209
1a00cb4998a8 Implemented a service that retrieves distance information for a specific river.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
210 return distance;
1a00cb4998a8 Implemented a service that retrieves distance information for a specific river.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
211 }
1a00cb4998a8 Implemented a service that retrieves distance information for a specific river.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
212 }
1a00cb4998a8 Implemented a service that retrieves distance information for a specific river.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
213 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org