Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/server/ChartServiceHelper.java @ 3818:dc18457b1cef

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merged flys-artifacts/pre2.7-2012-03-16
author Thomas Arendsen Hein <thomas@intevation.de>
date Fri, 28 Sep 2012 12:14:59 +0200
parents ab8eb2f544f2
children 1780841d79af
rev   line source
549
e74bf6bfeeb6 Use the same code to create the attribute document for the chart creation in ChartOutputService and ChartInfoService.
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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
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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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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);
549
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57 appendXRange(req, attributes, ec);
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58 appendYRange(req, attributes, ec);
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59
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60 doc.appendChild(attributes);
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61
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62 return doc;
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63 }
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64
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65
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66 /**
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67 * This method extracts the size (width/height) of a chart from request
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68 * object and append those values - if they exist - to the attribute
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69 * document used to adjust chart settings.
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70 *
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71 * @param req The request object that might contain the chart size.
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72 * @param attributes The attributes element used to adjust chart settings.
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73 * @param ec The ElementCreator that might be used to create new Elements.
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74 */
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75 protected static void appendChartSize(
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76 Map<String, String> req,
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77 Element attributes,
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78 ElementCreator ec)
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79 {
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80 logger.debug("ChartServiceHelper.appendChartSize");
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81
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82 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 /**
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100 * This method extracts the x range for the chart from request object and
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101 * appends those range - if it exists - to the attribute document used to
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102 * adjust the chart settings.
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103 *
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104 * @param req The request object that might contain the chart size.
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105 * @param doc The attribute document used to adjust chart settings.
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106 * @param ec The ElementCreator that might be used to create new Elements.
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107 */
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108 protected static void appendXRange(
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109 Map<String, String> req,
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110 Element attributes,
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111 ElementCreator ec)
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112 {
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113 logger.debug("ChartServiceHelper.appendXRange");
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114
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115 Element range = ec.create("xrange");
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116
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117 String from = req.get("minx");
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118 String to = req.get("maxx");
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119
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120 if (from != null && to != null) {
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121 ec.addAttr(range, "from", from, true);
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122 ec.addAttr(range, "to", to, true);
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123
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124 attributes.appendChild(range);
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125 }
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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 * This method extracts the x range for the chart from request object and
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131 * appends those range - if it exists - to the attribute document used to
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132 * adjust the chart settings.
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133 *
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134 * @param req The request object that might contain the chart size.
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135 * @param doc The attribute document used to adjust chart settings.
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136 * @param ec The ElementCreator that might be used to create new Elements.
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137 */
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138 protected static void appendYRange(
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139 Map<String, String> req,
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140 Element attributes,
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141 ElementCreator ec)
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142 {
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143 logger.debug("ChartServiceHelper.appendYRange");
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144
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145 Element range = ec.create("yrange");
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146
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147 String from = req.get("miny");
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148 String to = req.get("maxy");
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149
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150 if (from != null && to != null) {
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151 ec.addAttr(range, "from", from, true);
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152 ec.addAttr(range, "to", to, true);
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153
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154 attributes.appendChild(range);
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155 }
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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 * This method extracts the format string from request object and appends
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161 * those format - if existing - to the attribute document used to adjust
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162 * the chart settings.
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163 *
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164 * @param req The request object that might contain the chart format.
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165 * @param doc The attribute document used to adjust chart settings.
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166 * @param ec The ElementCreator that might be used to create new Elements.
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167 */
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168 protected static void appendFormat(
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169 Map<String, String> req,
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170 Element attributes,
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171 ElementCreator ec
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172
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173 ) {
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174 logger.debug("ChartServiceHelper.appendFormat");
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175
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176 String formatStr = req.get("format");
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177 if (formatStr == null || formatStr.length() == 0) {
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178 return;
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179 }
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180
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181 Element format = ec.create("format");
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182 ec.addAttr(format, "value", formatStr, true);
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183
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184 attributes.appendChild(format);
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185 }
549
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186 }
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187 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org