Mercurial > dive4elements > river

annotate gwt-client/src/main/java/org/dive4elements/river/client/server/ChartServiceHelper.java @ 9567:86e522bc7f36

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jUnit-Tests completed
author gernotbelger
date Mon, 05 Nov 2018 13:21:57 +0100
parents 4809e23ffd27
children
rev   line source
5861
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.client.server;
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10
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11 import java.util.Map;
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12
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13 import org.apache.log4j.Logger;
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14 import org.dive4elements.artifacts.common.ArtifactNamespaceContext;
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15 import org.dive4elements.artifacts.common.utils.XMLUtils;
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16 import org.dive4elements.artifacts.common.utils.XMLUtils.ElementCreator;
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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
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20 /**
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21 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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22 */
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23 public class ChartServiceHelper {
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24
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25 private static final Logger log = Logger.getLogger(ChartServiceHelper.class);
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26
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27 /** The default chart width if no value is specified in the request. */
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28 public static final int DEFAULT_CHART_WIDTH = 600;
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29
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30 /** The default chart height if no value is specified in the request. */
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31 public static final int DEFAULT_CHART_HEIGHT = 400;
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32
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33 private ChartServiceHelper() {
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34 }
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35
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36 /**
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37 * This method returns a document which might contain parameters to adjust
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38 * chart settings. The document is created using the information that are
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39 * contained in the request object.
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40 *
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41 * @param req
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42 * The request document.
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43 *
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44 * @return a document to adjust chart settings.
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45 */
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46 public static Document getChartAttributes(final Map<String, String> req) {
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47 log.debug("ChartServiceHelper.getChartAttributes");
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48
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49 final Document doc = XMLUtils.newDocument();
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50
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51 final ElementCreator ec = new ElementCreator(doc, ArtifactNamespaceContext.NAMESPACE_URI, ArtifactNamespaceContext.NAMESPACE_PREFIX);
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52
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53 final 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 appendExport(req, attributes, ec);
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58 appendXRange(req, attributes, ec);
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59 appendYRange(req, attributes, ec);
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60 appendCurrentKm(req, attributes, ec);
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61
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62 doc.appendChild(attributes);
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63
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64 return doc;
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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
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73 * The request object that might contain the chart size.
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74 * @param attributes
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75 * The attributes element used to adjust chart settings.
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76 * @param ec
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77 * The ElementCreator that might be used to create new Elements.
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78 */
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79 protected static void appendChartSize(final Map<String, String> req, final Element attributes, final ElementCreator ec) {
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80 log.debug("ChartServiceHelper.appendChartSize");
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81
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82 final Element size = ec.create("size");
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83
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84 String width = req.get("width");
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85 String height = req.get("height");
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86
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87 if (width == null || height == null) {
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88 width = String.valueOf(DEFAULT_CHART_WIDTH);
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89 height = String.valueOf(DEFAULT_CHART_HEIGHT);
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90 }
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91
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92 ec.addAttr(size, "width", width, true);
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93 ec.addAttr(size, "height", height, true);
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94
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95 attributes.appendChild(size);
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96 }
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97
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98 /**
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99 * This method extracts the x range for the chart from request object and
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100 * appends those range - if it exists - to the attribute document used to
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101 * adjust the chart settings.
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102 *
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103 * @param req
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104 * The request object that might contain the chart size.
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105 * @param doc
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106 * The attribute document used to adjust chart settings.
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107 * @param ec
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108 * The ElementCreator that might be used to create new Elements.
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109 */
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110 protected static void appendXRange(final Map<String, String> req, final Element attributes, final ElementCreator ec) {
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111 log.debug("ChartServiceHelper.appendXRange");
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112
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113 final Element range = ec.create("xrange");
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114
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115 final String from = req.get("minx");
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116 final String to = req.get("maxx");
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117
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118 if (from != null && to != null) {
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119 ec.addAttr(range, "from", from, true);
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120 ec.addAttr(range, "to", to, true);
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121
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122 attributes.appendChild(range);
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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 extracts the x range for the chart from request object and
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128 * appends those range - if it exists - to the attribute document used to
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129 * adjust the chart settings.
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130 *
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131 * @param req
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132 * The request object that might contain the chart size.
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133 * @param doc
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134 * The attribute document used to adjust chart settings.
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135 * @param ec
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136 * The ElementCreator that might be used to create new Elements.
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137 */
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138 protected static void appendYRange(final Map<String, String> req, final Element attributes, final ElementCreator ec) {
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139 log.debug("ChartServiceHelper.appendYRange");
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140
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141 final Element range = ec.create("yrange");
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142
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143 final String from = req.get("miny");
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144 final String to = req.get("maxy");
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145
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146 if (from != null && to != null) {
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147 ec.addAttr(range, "from", from, true);
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148 ec.addAttr(range, "to", to, true);
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149
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150 attributes.appendChild(range);
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151 }
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152 }
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153
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154 /**
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155 * This method extracts the format string from request object and appends
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156 * those format - if existing - to the attribute document used to adjust
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157 * the chart settings.
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158 *
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159 * @param req
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160 * The request object that might contain the chart format.
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161 * @param doc
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162 * The attribute document used to adjust chart settings.
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163 * @param ec
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164 * The ElementCreator that might be used to create new Elements.
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165 */
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166 private static void appendFormat(final Map<String, String> req, final Element attributes, final ElementCreator ec
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167
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168 ) {
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169 log.debug("ChartServiceHelper.appendFormat");
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170
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171 final String formatStr = req.get("format");
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172 if (formatStr == null || formatStr.length() == 0) {
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173 return;
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174 }
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175
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176 final Element format = ec.create("format");
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177 ec.addAttr(format, "value", formatStr, true);
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178
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179 attributes.appendChild(format);
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180 }
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181
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182 /**
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183 * This method extracts the export string from request object and appends
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184 * those format - if existing - to the attribute document used to adjust
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185 * the chart settings.
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186 *
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187 * @param req
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188 * The request object that might contain the chart export flag.
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189 * @param doc
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190 * The attribute document used to adjust chart settings.
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191 * @param ec
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192 * The ElementCreator that might be used to create new Elements.
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193 */
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194 private static void appendExport(final Map<String, String> req, final Element attributes, final ElementCreator ec) {
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195
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196 final String exportStr = req.get("export");
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197 if (exportStr == null || exportStr.isEmpty())
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198 return;
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199
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200 final Element format = ec.create("export");
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201 ec.addAttr(format, "value", exportStr, true);
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202
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203 attributes.appendChild(format);
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204 }
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205
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206 /**
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207 * This method extracts the current km for the chart from request object and
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208 * appends this km - if it exists - to the attribute document used to
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209 * adjust the chart settings.
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210 *
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211 * @param req
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212 * The request object that might contain the chart size.
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213 * @param doc
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214 * The attribute document used to adjust chart settings.
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215 * @param ec
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216 * The ElementCreator that might be used to create new Elements.
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217 */
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218 protected static void appendCurrentKm(final Map<String, String> req, final Element attributes, final ElementCreator ec) {
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219 log.debug("ChartServiceHelper.appendCurrentKm");
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220
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221 final Element currentKm = ec.create("currentKm");
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222
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223 final String km = req.get("km");
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224
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225 if (km != null) {
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226 ec.addAttr(currentKm, "km", km, true);
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227
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228 attributes.appendChild(currentKm);
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229 }
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230 }
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231
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232 }
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233 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org