Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/exports/ChartGenerator.java @ 1095:f465785ed1ae
Refactored the code to fetch the km range/locations into a utility class.
flys-artifacts/trunk@2598 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Fri, 26 Aug 2011 14:58:35 +0000 |
parents | 61c051e53f9b |
children | 9383a4608d9f |
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Added an abstract OutGenerator that should be the base class for all generators which create charts.
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1 package de.intevation.flys.exports; |
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2 |
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3 import java.io.IOException; |
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4 import java.io.OutputStream; |
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5 |
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6 import javax.xml.xpath.XPathConstants; |
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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 org.w3c.dom.Document; |
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11 import org.w3c.dom.Element; |
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12 |
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13 import org.jfree.data.Range; |
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15 import de.intevation.artifacts.Artifact; |
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16 import de.intevation.artifacts.CallContext; |
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17 |
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18 import de.intevation.artifacts.ArtifactNamespaceContext; |
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19 import de.intevation.artifacts.common.utils.XMLUtils; |
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20 |
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OutGenerators doOut() takes a facet object now instead of just its name.
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21 import de.intevation.artifactdatabase.state.Facet; |
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22 |
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23 import de.intevation.flys.model.River; |
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24 |
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25 import de.intevation.flys.artifacts.WINFOArtifact; |
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26 |
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27 import de.intevation.flys.artifacts.resources.Resources; |
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28 import de.intevation.flys.utils.FLYSUtils; |
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29 |
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30 |
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31 /** |
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32 * The base class for chart creation. It should provide some basic things that |
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33 * equal in all chart types. |
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34 * |
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35 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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36 */ |
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37 public abstract class ChartGenerator implements OutGenerator { |
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38 |
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39 private static Logger logger = Logger.getLogger(ChartGenerator.class); |
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40 |
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41 |
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42 /** The default chart width, if no other width is set.*/ |
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43 public static final int DEFAULT_CHART_WIDTH = 600; |
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44 |
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45 /** The default chart height, if no other height is set.*/ |
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46 public static final int DEFAULT_CHART_HEIGHT = 400; |
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47 |
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48 /** The XPath that points to the chart size of the incoming request |
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49 * document.*/ |
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50 public static final String XPATH_CHART_SIZE = |
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51 "/art:action/art:attributes/art:size"; |
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52 |
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53 public static final String XPATH_CHART_X_RANGE = |
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54 "/art:action/art:attributes/art:xrange"; |
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55 |
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56 public static final String XPATH_CHART_Y_RANGE = |
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57 "/art:action/art:attributes/art:yrange"; |
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58 |
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59 |
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60 /** The document of the incoming out() request.*/ |
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61 protected Document request; |
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62 |
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63 /** The output stream where the data should be written to.*/ |
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64 protected OutputStream out; |
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65 |
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66 /** The CallContext object.*/ |
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67 protected CallContext context; |
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68 |
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69 /** The artifact that is used to decorate the chart with meta information.*/ |
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70 protected Artifact master; |
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71 |
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72 |
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73 public void init(Document request, OutputStream out, CallContext context) { |
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74 logger.debug("ChartGenerator.init"); |
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75 |
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76 this.request = request; |
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77 this.out = out; |
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78 this.context = context; |
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79 } |
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80 |
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81 |
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82 public void setMasterArtifact(Artifact master) { |
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83 this.master = master; |
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84 } |
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85 |
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86 |
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87 protected String msg(String key, String def) { |
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88 return Resources.getMsg(context.getMeta(), key, def); |
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89 } |
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90 |
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91 |
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92 protected String msg(String key, String def, Object[] args) { |
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93 return Resources.getMsg(context.getMeta(), key, def, args); |
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94 } |
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95 |
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96 |
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97 protected String getRiverName() { |
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98 WINFOArtifact flys = (WINFOArtifact) master; |
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99 |
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100 River river = flys.getRiver(); |
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101 return river != null ? river.getName() : ""; |
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102 } |
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103 |
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104 |
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105 protected double[] getRange() { |
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106 WINFOArtifact flys = (WINFOArtifact) master; |
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107 |
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108 return FLYSUtils.getKmRange(flys); |
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109 } |
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110 |
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111 |
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112 /** |
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113 * Returns the size of a chart export as array which has been specified by |
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114 * the incoming request document. |
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115 * |
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116 * @return the size of a chart as [width, height] or the result of |
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117 * getDefaultSize() if no width or height are given in the request document. |
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118 */ |
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119 protected int[] getSize() { |
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120 int[] size = new int[2]; |
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121 |
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122 Element sizeEl = (Element)XMLUtils.xpath( |
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123 request, |
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124 XPATH_CHART_SIZE, |
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125 XPathConstants.NODE, |
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126 ArtifactNamespaceContext.INSTANCE); |
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127 |
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128 if (sizeEl != null) { |
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129 String uri = ArtifactNamespaceContext.NAMESPACE_URI; |
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130 |
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131 String w = sizeEl.getAttributeNS(uri, "width"); |
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132 String h = sizeEl.getAttributeNS(uri, "height"); |
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133 |
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134 if (w.length() > 0 && h.length() > 0) { |
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135 try { |
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136 size[0] = Integer.parseInt(w); |
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137 size[1] = Integer.parseInt(h); |
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138 } |
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139 catch (NumberFormatException nfe) { |
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140 logger.warn("Wrong values for chart width/height."); |
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141 } |
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142 } |
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143 } |
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144 |
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145 return size[0] > 0 && size[1] > 0 ? size : getDefaultSize(); |
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146 } |
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147 |
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148 |
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149 protected Range getDomainAxisRange() { |
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150 Element xrange = (Element)XMLUtils.xpath( |
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151 request, |
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152 XPATH_CHART_X_RANGE, |
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153 XPathConstants.NODE, |
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154 ArtifactNamespaceContext.INSTANCE); |
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155 |
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156 if (xrange == null) { |
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157 return null; |
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158 } |
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159 |
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160 String uri = ArtifactNamespaceContext.NAMESPACE_URI; |
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161 |
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162 String lower = xrange.getAttributeNS(uri, "from"); |
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163 String upper = xrange.getAttributeNS(uri, "to"); |
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164 |
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165 logger.debug("FOUND X RANGE: " + lower + " -> " + upper); |
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166 |
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167 if (lower.length() > 0 && upper.length() > 0) { |
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168 try { |
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169 double from = Double.parseDouble(lower); |
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170 double to = Double.parseDouble(upper); |
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171 |
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172 if (from == 0 && to == 0) { |
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173 logger.debug("No range specified. Lower and upper X == 0"); |
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174 return null; |
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175 } |
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176 |
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177 if (from > to) { |
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178 double tmp = to; |
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179 to = from; |
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180 from = tmp; |
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181 } |
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182 |
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183 return new Range(from, to); |
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184 } |
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185 catch (NumberFormatException nfe) { |
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186 logger.warn("Wrong values for domain axis range."); |
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187 } |
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188 } |
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189 |
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190 return null; |
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191 } |
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192 |
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193 |
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194 protected Range getValueAxisRange() { |
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195 Element yrange = (Element)XMLUtils.xpath( |
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196 request, |
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197 XPATH_CHART_Y_RANGE, |
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198 XPathConstants.NODE, |
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199 ArtifactNamespaceContext.INSTANCE); |
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200 |
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201 if (yrange == null) { |
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202 return null; |
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203 } |
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204 |
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205 String uri = ArtifactNamespaceContext.NAMESPACE_URI; |
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206 |
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207 String lower = yrange.getAttributeNS(uri, "from"); |
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208 String upper = yrange.getAttributeNS(uri, "to"); |
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209 |
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210 if (lower.length() > 0 && upper.length() > 0) { |
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211 try { |
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212 double from = Double.parseDouble(lower); |
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213 double to = Double.parseDouble(upper); |
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214 |
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215 if (from == 0 && to == 0) { |
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216 logger.debug("No range specified. Lower and upper Y == 0"); |
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217 return null; |
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218 } |
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219 |
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220 if (from > to) { |
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221 double tmp = to; |
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222 to = from; |
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223 from = tmp; |
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224 } |
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225 |
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226 return new Range(from, to); |
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227 } |
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228 catch (NumberFormatException nfe) { |
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229 logger.warn("Wrong values for value axis range."); |
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230 } |
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231 } |
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232 |
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233 return null; |
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234 } |
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235 |
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236 |
423
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237 /** |
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238 * Returns the default size of a chart export as array. |
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239 * |
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240 * @return the default size of a chart as [width, height]. |
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241 */ |
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242 protected int[] getDefaultSize() { |
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243 return new int[] { DEFAULT_CHART_WIDTH, DEFAULT_CHART_HEIGHT }; |
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244 } |
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245 |
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246 |
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OutGenerators doOut() takes a facet object now instead of just its name.
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247 public abstract void doOut(Artifact artifact, Facet facet, Document attr); |
348
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248 |
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249 public abstract void generate() throws IOException; |
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250 } |
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251 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |