Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/exports/ChartGenerator.java @ 674:d5f9ba1d055f
Added calculation base class to collect the problems during the calculations. Adjusted calculation 4 to use the mechanism.
flys-artifacts/trunk@2098 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Fri, 10 Jun 2011 09:19:27 +0000 |
parents | 8fa4c5c9cd1a |
children | 45cd58a2a2bb |
rev | line source |
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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.Node; |
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12 |
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13 import org.jfree.data.Range; |
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14 |
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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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21 import de.intevation.flys.model.River; |
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22 |
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23 import de.intevation.flys.artifacts.FLYSArtifact; |
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24 import de.intevation.flys.artifacts.resources.Resources; |
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25 |
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26 |
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27 /** |
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28 * The base class for chart creation. It should provide some basic things that |
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29 * equal in all chart types. |
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30 * |
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31 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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32 */ |
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33 public abstract class ChartGenerator implements OutGenerator { |
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34 |
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35 private static Logger logger = Logger.getLogger(ChartGenerator.class); |
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36 |
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37 |
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38 /** The default chart width, if no other width is set.*/ |
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39 public static final int DEFAULT_CHART_WIDTH = 600; |
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40 |
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41 /** The default chart height, if no other height is set.*/ |
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42 public static final int DEFAULT_CHART_HEIGHT = 400; |
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43 |
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44 /** The XPath that points to the chart size of the incoming request |
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45 * document.*/ |
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46 public static final String XPATH_CHART_SIZE = |
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47 "/art:action/art:attributes/art:size"; |
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48 |
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49 public static final String XPATH_CHART_X_RANGE = |
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50 "/art:action/art:attributes/art:xrange"; |
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51 |
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52 public static final String XPATH_CHART_Y_RANGE = |
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53 "/art:action/art:attributes/art:yrange"; |
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54 |
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55 |
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56 /** The document of the incoming out() request.*/ |
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57 protected Document request; |
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58 |
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59 /** The output stream where the data should be written to.*/ |
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60 protected OutputStream out; |
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61 |
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62 /** The CallContext object.*/ |
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63 protected CallContext context; |
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64 |
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65 /** The artifact that is used to decorate the chart with meta information.*/ |
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66 protected Artifact master; |
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67 |
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68 |
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69 public void init(Document request, OutputStream out, CallContext context) { |
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70 logger.debug("ChartGenerator.init"); |
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71 |
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72 this.request = request; |
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73 this.out = out; |
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74 this.context = context; |
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75 } |
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76 |
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77 |
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78 public void setMasterArtifact(Artifact master) { |
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79 this.master = master; |
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80 } |
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81 |
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82 |
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83 protected String msg(String key, String def) { |
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84 return Resources.getMsg(context.getMeta(), key, def); |
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85 } |
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86 |
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87 |
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88 protected String msg(String key, String def, Object[] args) { |
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89 return Resources.getMsg(context.getMeta(), key, def, args); |
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90 } |
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91 |
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92 |
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93 protected String getRiverName() { |
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94 FLYSArtifact flys = (FLYSArtifact) master; |
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95 |
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96 River river = flys.getRiver(); |
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97 return river != null ? river.getName() : ""; |
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98 } |
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99 |
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101 protected double[] getRange() { |
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102 FLYSArtifact flys = (FLYSArtifact) master; |
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103 |
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104 return flys.getDistance(); |
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105 } |
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106 |
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107 |
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108 /** |
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109 * Returns the size of a chart export as array which has been specified by |
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110 * the incoming request document. |
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111 * |
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112 * @return the size of a chart as [width, height] or the result of |
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113 * getDefaultSize() if no width or height are given in the request document. |
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114 */ |
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115 protected int[] getSize() { |
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116 int[] size = new int[2]; |
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117 |
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118 Node sizeEl = (Node) XMLUtils.xpath( |
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119 request, |
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120 XPATH_CHART_SIZE, |
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121 XPathConstants.NODE, |
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122 ArtifactNamespaceContext.INSTANCE); |
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123 |
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124 if (sizeEl != null) { |
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125 String w = XMLUtils.xpathString( |
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126 sizeEl, "@art:width", ArtifactNamespaceContext.INSTANCE); |
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127 |
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128 String h = XMLUtils.xpathString( |
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129 sizeEl, "@art:height", ArtifactNamespaceContext.INSTANCE); |
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130 |
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131 if (w != null && w.length() > 0 && h != null && h.length() > 0) { |
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132 try { |
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133 size[0] = Integer.parseInt(w); |
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134 size[1] = Integer.parseInt(h); |
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135 } |
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136 catch (NumberFormatException nfe) { |
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137 logger.warn("Wrong values for chart width/height."); |
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138 } |
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139 } |
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140 } |
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141 |
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142 return size[0] > 0 && size[1] > 0 ? size : getDefaultSize(); |
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143 } |
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144 |
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145 |
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146 protected Range getDomainAxisRange() { |
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147 Node xrange = (Node) XMLUtils.xpath( |
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148 request, |
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149 XPATH_CHART_X_RANGE, |
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150 XPathConstants.NODE, |
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151 ArtifactNamespaceContext.INSTANCE); |
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152 |
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153 if (xrange == null) { |
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154 return null; |
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155 } |
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156 |
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157 String lower = XMLUtils.xpathString( |
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158 xrange, "@art:from", ArtifactNamespaceContext.INSTANCE); |
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159 |
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160 String upper = XMLUtils.xpathString( |
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161 xrange, "@art:to", ArtifactNamespaceContext.INSTANCE); |
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162 |
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163 logger.debug("FOUND X RANGE: " + lower + " -> " + upper); |
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164 |
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165 if (lower != null && upper != null) { |
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166 try { |
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167 double from = Double.parseDouble(lower); |
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168 double to = Double.parseDouble(upper); |
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169 |
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170 if (from == 0 && to == 0) { |
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171 logger.debug("No range specified. Lower and upper X == 0"); |
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172 return null; |
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173 } |
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174 |
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175 if (from > to) { |
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176 double tmp = to; |
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177 to = from; |
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178 from = tmp; |
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179 } |
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180 |
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181 return new Range(from, to); |
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182 } |
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183 catch (NumberFormatException nfe) { |
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184 logger.warn("Wrong values for domain axis range."); |
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185 } |
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186 } |
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187 |
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188 return null; |
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189 } |
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190 |
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191 |
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192 protected Range getValueAxisRange() { |
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193 Node yrange = (Node) XMLUtils.xpath( |
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194 request, |
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195 XPATH_CHART_Y_RANGE, |
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196 XPathConstants.NODE, |
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197 ArtifactNamespaceContext.INSTANCE); |
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198 |
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199 if (yrange == null) { |
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200 return null; |
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201 } |
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202 |
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203 String lower = XMLUtils.xpathString( |
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204 yrange, "@art:from", ArtifactNamespaceContext.INSTANCE); |
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205 |
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206 String upper = XMLUtils.xpathString( |
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207 yrange, "@art:to", ArtifactNamespaceContext.INSTANCE); |
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208 |
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209 if (lower != null && upper != null) { |
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210 try { |
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211 double from = Double.parseDouble(lower); |
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212 double to = Double.parseDouble(upper); |
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213 |
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214 if (from == 0 && to == 0) { |
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215 logger.debug("No range specified. Lower and upper Y == 0"); |
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216 return null; |
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217 } |
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218 |
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219 if (from > to) { |
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220 double tmp = to; |
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221 to = from; |
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222 from = tmp; |
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223 } |
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224 |
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225 return new Range(from, to); |
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226 } |
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227 catch (NumberFormatException nfe) { |
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228 logger.warn("Wrong values for value axis range."); |
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229 } |
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230 } |
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231 |
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232 return null; |
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233 } |
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234 |
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235 |
423
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236 /** |
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237 * Returns the default size of a chart export as array. |
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238 * |
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239 * @return the default size of a chart as [width, height]. |
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240 */ |
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241 protected int[] getDefaultSize() { |
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242 return new int[] { DEFAULT_CHART_WIDTH, DEFAULT_CHART_HEIGHT }; |
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243 } |
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244 |
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245 |
364
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246 public abstract void doOut(Artifact artifact, String facet, Document attr); |
348
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247 |
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248 public abstract void generate() throws IOException; |
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249 } |
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250 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |