Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/server/ChartServiceHelper.java @ 4128:11c589d68f13

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Fix for NPE in FLYSWorkspace.bringUp() #933
author Christian Lins <christian.lins@intevation.de>
date Sun, 14 Oct 2012 10:15:50 +0200
parents 1780841d79af
children
rev   line source
549
e74bf6bfeeb6 Use the same code to create the attribute document for the chart creation in ChartOutputService and ChartInfoService.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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1 package de.intevation.flys.client.server;
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2
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3 import java.util.Map;
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4
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5 import org.w3c.dom.Document;
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6 import org.w3c.dom.Element;
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7
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8 import org.apache.log4j.Logger;
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9
549
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10 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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11 import de.intevation.artifacts.common.utils.XMLUtils;
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12 import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
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13
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14
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15 /**
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16 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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17 */
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18 public class ChartServiceHelper {
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19
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20 private static final Logger logger =
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21 Logger.getLogger(ChartServiceHelper.class);
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22
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23
549
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24 /** The default chart width if no value is specified in the request.*/
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25 public static final int DEFAULT_CHART_WIDTH = 600;
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26
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27 /** The default chart height if no value is specified in the request.*/
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28 public static final int DEFAULT_CHART_HEIGHT = 400;
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29
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30
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31 private ChartServiceHelper() {
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32 }
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33
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34 /**
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35 * This method returns a document which might contain parameters to adjust
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36 * chart settings. The document is created using the information that are
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37 * contained in the request object.
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38 *
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39 * @param req The request document.
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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40 *
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41 * @return a document to adjust chart settings.
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42 */
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43 protected static Document getChartAttributes(Map<String, String> req) {
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44 logger.debug("ChartServiceHelper.getChartAttributes");
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45
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46 Document doc = XMLUtils.newDocument();
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47
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48 ElementCreator ec = new ElementCreator(
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49 doc,
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50 ArtifactNamespaceContext.NAMESPACE_URI,
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51 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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52
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53 Element attributes = ec.create("attributes");
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54
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55 appendChartSize(req, attributes, ec);
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56 appendFormat(req, attributes, ec);
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57 appendXRange(req, attributes, ec);
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58 appendYRange(req, attributes, ec);
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59 appendCurrentKm(req, attributes, ec);
549
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60
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61 doc.appendChild(attributes);
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62
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63 return doc;
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64 }
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65
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66
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67 /**
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68 * This method extracts the size (width/height) of a chart from request
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69 * object and append those values - if they exist - to the attribute
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70 * document used to adjust chart settings.
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71 *
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72 * @param req The request object that might contain the chart size.
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73 * @param attributes The attributes element used to adjust chart settings.
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74 * @param ec The ElementCreator that might be used to create new Elements.
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75 */
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76 protected static void appendChartSize(
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77 Map<String, String> req,
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78 Element attributes,
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79 ElementCreator ec)
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80 {
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81 logger.debug("ChartServiceHelper.appendChartSize");
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82
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83 Element size = ec.create("size");
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84
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85 String width = req.get("width");
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86 String height = req.get("height");
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87
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88 if (width == null || height == null) {
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89 width = String.valueOf(DEFAULT_CHART_WIDTH);
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90 height = String.valueOf(DEFAULT_CHART_HEIGHT);
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91 }
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92
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93 ec.addAttr(size, "width", width, true);
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94 ec.addAttr(size, "height", height, true);
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95
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96 attributes.appendChild(size);
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97 }
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98
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99
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100 /**
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101 * This method extracts the x range for the chart from request object and
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102 * appends those range - if it exists - to the attribute document used to
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103 * adjust the chart settings.
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104 *
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105 * @param req The request object that might contain the chart size.
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106 * @param doc The attribute document used to adjust chart settings.
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107 * @param ec The ElementCreator that might be used to create new Elements.
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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108 */
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109 protected static void appendXRange(
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110 Map<String, String> req,
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111 Element attributes,
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112 ElementCreator ec)
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113 {
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114 logger.debug("ChartServiceHelper.appendXRange");
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115
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116 Element range = ec.create("xrange");
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117
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118 String from = req.get("minx");
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119 String to = req.get("maxx");
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120
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121 if (from != null && to != null) {
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122 ec.addAttr(range, "from", from, true);
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123 ec.addAttr(range, "to", to, true);
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124
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125 attributes.appendChild(range);
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126 }
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127 }
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128
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129
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130 /**
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131 * This method extracts the x range for the chart from request object and
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132 * appends those range - if it exists - to the attribute document used to
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133 * adjust the chart settings.
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134 *
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135 * @param req The request object that might contain the chart size.
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136 * @param doc The attribute document used to adjust chart settings.
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137 * @param ec The ElementCreator that might be used to create new Elements.
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138 */
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139 protected static void appendYRange(
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140 Map<String, String> req,
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141 Element attributes,
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142 ElementCreator ec)
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143 {
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144 logger.debug("ChartServiceHelper.appendYRange");
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145
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146 Element range = ec.create("yrange");
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147
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148 String from = req.get("miny");
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149 String to = req.get("maxy");
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150
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151 if (from != null && to != null) {
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152 ec.addAttr(range, "from", from, true);
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153 ec.addAttr(range, "to", to, true);
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154
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155 attributes.appendChild(range);
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156 }
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157 }
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158
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159
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160 /**
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161 * This method extracts the format string from request object and appends
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162 * those format - if existing - to the attribute document used to adjust
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163 * the chart settings.
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164 *
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165 * @param req The request object that might contain the chart format.
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166 * @param doc The attribute document used to adjust chart settings.
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167 * @param ec The ElementCreator that might be used to create new Elements.
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168 */
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169 protected static void appendFormat(
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170 Map<String, String> req,
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171 Element attributes,
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172 ElementCreator ec
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173
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174 ) {
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175 logger.debug("ChartServiceHelper.appendFormat");
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176
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177 String formatStr = req.get("format");
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178 if (formatStr == null || formatStr.length() == 0) {
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179 return;
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180 }
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181
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182 Element format = ec.create("format");
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183 ec.addAttr(format, "value", formatStr, true);
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184
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185 attributes.appendChild(format);
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186 }
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187
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188
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189 /**
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190 * This method extracts the current km for the chart from request object and
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191 * appends this km - if it exists - to the attribute document used to
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192 * adjust the chart settings.
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193 *
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194 * @param req The request object that might contain the chart size.
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195 * @param doc The attribute document used to adjust chart settings.
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196 * @param ec The ElementCreator that might be used to create new Elements.
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197 */
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198 protected static void appendCurrentKm(
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199 Map<String, String> req,
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200 Element attributes,
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201 ElementCreator ec)
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202 {
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203 logger.debug("ChartServiceHelper.appendCurrentKm");
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204
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205 Element currentKm = ec.create("currentKm");
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206
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207 String km = req.get("km");
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208
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209 if (km != null) {
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210 ec.addAttr(currentKm, "km", km, true);
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211
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212 attributes.appendChild(currentKm);
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213 }
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214 }
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215
549
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216 }
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217 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org