Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/artifacts/context/GNVArtifactContextFactory.java @ 426:3a0c0ad113d9

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Load palettes from configuration. gnv-artifacts/trunk@474 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Tue, 22 Dec 2009 10:34:15 +0000
parents 77cd3a2bc381
children 7399bb8f83ea
rev   line source
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1 /**
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2 *
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3 */
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4 package de.intevation.gnv.artifacts.context;
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5
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6 import java.io.FileInputStream;
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7 import java.io.FileNotFoundException;
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8 import java.io.IOException;
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9 import java.io.InputStream;
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10 import java.io.File;
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11
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12 import java.util.Properties;
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13 import java.util.HashMap;
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14
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15 import org.apache.log4j.Logger;
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16
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17 import org.w3c.dom.Document;
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18 import org.w3c.dom.Element;
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19 import org.w3c.dom.NodeList;
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20 import org.w3c.dom.Node;
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21
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22 import de.intevation.gnv.geobackend.base.connectionpool.ConnectionPoolFactory;
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23
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24 import de.intevation.gnv.geobackend.base.query.container.QueryContainerFactory;
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25 import de.intevation.gnv.geobackend.base.query.container.exception.QueryContainerException;
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26
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27 import de.intevation.gnv.chart.XMLChartTheme;
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28
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29 import de.intevation.gnv.artifacts.cache.CacheFactory;
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30
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31 import de.intevation.gnv.raster.Palette;
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32
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33 import de.intevation.artifacts.ArtifactContextFactory;
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34
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35 import de.intevation.artifactdatabase.Config;
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36 import de.intevation.artifactdatabase.XMLUtils;
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37
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38 /**
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39 * @author Tim Englich <tim.englich@intevation.de>
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40 *
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41 */
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42 public class GNVArtifactContextFactory implements ArtifactContextFactory {
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43 /**
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44 * the logger, used to log exceptions and additonaly information
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45 */
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46 private static Logger log = Logger.getLogger(GNVArtifactContext.class);
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47
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48 public static final String XPATH_GEOBACKEND_CONFIGURATION =
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49 "artifact-database/geo-backend/backend-configuration";
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50
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51 public static final String XPATH_GEOBACKEND_QUERYCONFIGURATION =
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52 "artifact-database/geo-backend/query-configuration";
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53
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54 private final static String CACHECONFIGNODEPATH =
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55 "/artifact-database/ehcache/configuration";
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56
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57 private final static String CHARTCONFIGNODEPATH =
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58 "/artifact-database/charttemplate/configuration";
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59
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60 public final static String PALETTES_PATH =
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61 "/artifact-database/palettes";
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62
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63 public final static String PALETTE_ITEMS =
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64 "palette";
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65
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66 public final static String PALETTES =
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67 "color.palettes";
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68
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69 public final static String CHARTTEMPLATE = "template";
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70
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71 /**
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72 * Constructor
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73 */
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74 public GNVArtifactContextFactory() {
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75 super();
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76 log.debug("GNVArtifactContextFactory.Constructor");
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77 }
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78
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79 /**
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80 * @see de.intevation.artifacts.ArtifactContextFactory#createArtifactContext(org.w3c.dom.Document)
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81 */
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82 public Object createArtifactContext(Document config) {
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83 GNVArtifactContext returnValue = null;
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84 try {
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85 log.debug("GNVArtifactContextFactory.createArtifactContext");
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86 log.info("Initialisation of the Geo-BackendConnectionPool");
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87 String backendConfigurationFile = Config.getStringXPath(config,
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88 XPATH_GEOBACKEND_CONFIGURATION);
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89 backendConfigurationFile = Config.replaceConfigDir(
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90 backendConfigurationFile);
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91
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92 Properties properties = getProperties(backendConfigurationFile);
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93 ConnectionPoolFactory cpf = ConnectionPoolFactory.getInstance();
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94 cpf.initializeConnectionPool(properties);
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95
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96 log.info("Initialisation of the QueryContainer");
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97 String queryConfigurationFile = Config.getStringXPath(config,
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98 XPATH_GEOBACKEND_QUERYCONFIGURATION);
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99 queryConfigurationFile = Config.replaceConfigDir(
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100 queryConfigurationFile);
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101
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102 Properties queryProperties = getProperties(queryConfigurationFile);
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103 QueryContainerFactory qcf = QueryContainerFactory.getInstance();
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104 qcf.initializeQueryContainer(queryProperties);
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105
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106 log.info("Initialisation of the Cache");
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107 String cacheConfigurationFile = Config.getStringXPath(config,
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108 CACHECONFIGNODEPATH);
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109 cacheConfigurationFile = Config.replaceConfigDir(
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110 cacheConfigurationFile);
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111
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112 CacheFactory cf = CacheFactory.getInstance();
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113 cf.initializeCache(cacheConfigurationFile);
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114
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115 returnValue = new GNVArtifactContext(config);
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116
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117 configurePalettes(config, returnValue);
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118
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119 configureChartTemplate(config, returnValue);
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120
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121
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122 } catch (FileNotFoundException e) {
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123 log.error(e, e);
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124 } catch (IOException e) {
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125 log.error(e, e);
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126 } catch (QueryContainerException e) {
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127 log.error(e, e);
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128 }
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129 return returnValue;
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130 }
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131
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132 protected void configureChartTemplate(
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133 Document config,
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134 GNVArtifactContext context
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135 ) {
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136 log.info("Initialisation of chart template");
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137 String chartConfigFile = Config.getStringXPath(
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138 config, CHARTCONFIGNODEPATH
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139 );
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140 chartConfigFile = Config.replaceConfigDir(chartConfigFile);
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141 log.debug("Parse xml configuration of " + chartConfigFile);
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142
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143 Document tmpl = XMLUtils.parseDocument(new File(chartConfigFile));
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144 XMLChartTheme theme = new XMLChartTheme("XMLChartTheme");
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145 if (tmpl != null) {
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146 theme.applyXMLConfiguration(tmpl);
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147 }
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148 else {
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149 log.error(
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150 "Cannot load chart template from '" +
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151 chartConfigFile + "'");
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152 }
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153
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154 context.put(CHARTTEMPLATE, theme);
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155 }
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156
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157 protected void configurePalettes(
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158 Document config,
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159 GNVArtifactContext context
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160 ) {
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161 log.info("configure palettes");
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162
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163 HashMap palettes = new HashMap();
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164
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165 Node node = Config.getNodeXPath(config, PALETTES_PATH);
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166
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167 if (node == null) {
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168 log.error("No palettes found");
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169 }
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170 else {
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171 NodeList pals = Config.getNodeSetXPath(PALETTE_ITEMS);
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172 for (int i = 0, N = pals == null ? 0 : pals.getLength(); i < N; ++i) {
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173 Element pal = (Element)pals.item(i);
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174 String name = pal.getAttribute("name");
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175 String description = pal.getAttribute("description");
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176 String filename = pal.getAttribute("file");
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177
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178 if (name == null || name.length() == 0) {
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179 log.error("Palette has no 'name' attribute.");
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180 }
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181 else if (filename == null || filename.length() == 0) {
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182 log.error("Palette has no 'file' attribute.");
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183 }
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184 else {
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185 filename = Config.replaceConfigDir(filename);
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186 Document document = XMLUtils.parseDocument(
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187 new File(filename));
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188 if (document == null) {
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189 log.error("Cannot load palette file '" +
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190 filename + "'");
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191 }
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192 else {
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193 Palette p = new Palette(document, description);
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194 palettes.put(name, p);
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195 }
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196 }
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197 }
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198 }
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199
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200 context.put(PALETTES, palettes);
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201 }
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202
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4d6a82b96059 First Implementation of the GNV-Artifacts
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203 /**
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204 * @param filePath
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205 * @return
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206 * @throws FileNotFoundException
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207 * @throws IOException
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208 */
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209 private Properties getProperties(String filePath)
426
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210 throws FileNotFoundException, IOException
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211 {
172
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212 InputStream inputStream = null;
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213 try {
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214 inputStream = new FileInputStream(filePath);
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215 Properties properties = new Properties();
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216 properties.load(inputStream);
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217 return properties;
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218 }
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219 finally {
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diff changeset
220 if (inputStream != null) {
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221 try { inputStream.close(); }
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diff changeset
222 catch (IOException ioe) {}
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223 }
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224 }
52
4d6a82b96059 First Implementation of the GNV-Artifacts
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225 }
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parents:
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226 }
http://dive4elements.wald.intevation.org