Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/exports/ChartGenerator.java @ 1948:65f9d707caff
Removed superfluous imports.
flys-artifacts/trunk@3340 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Wed, 30 Nov 2011 12:06:32 +0000 |
parents | 21a4d2c677a1 |
children | a7c437c9547e |
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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 import java.util.Locale; |
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7 import javax.xml.xpath.XPathConstants; |
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8 |
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9 import org.apache.log4j.Logger; |
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10 |
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11 import org.w3c.dom.Document; |
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12 import org.w3c.dom.Element; |
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13 |
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14 import org.jfree.data.Range; |
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16 import de.intevation.artifacts.Artifact; |
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17 import de.intevation.artifacts.CallContext; |
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18 import de.intevation.artifacts.CallMeta; |
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19 import de.intevation.artifacts.PreferredLocale; |
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20 |
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21 import de.intevation.artifacts.ArtifactNamespaceContext; |
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22 import de.intevation.artifacts.common.utils.XMLUtils; |
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23 |
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24 import de.intevation.flys.model.River; |
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25 |
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26 import de.intevation.flys.artifacts.WINFOArtifact; |
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27 import de.intevation.artifactdatabase.state.ArtifactAndFacet; |
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28 |
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29 import de.intevation.flys.artifacts.resources.Resources; |
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30 import de.intevation.flys.utils.FLYSUtils; |
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31 |
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32 |
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33 /** |
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34 * The base class for chart creation. It should provide some basic things that |
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35 * equal in all chart types. |
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36 * |
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37 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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38 */ |
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39 public abstract class ChartGenerator implements OutGenerator { |
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40 |
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41 private static Logger logger = Logger.getLogger(ChartGenerator.class); |
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42 |
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43 /** The default chart width, if no other width is set. */ |
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44 public static final int DEFAULT_CHART_WIDTH = 600; |
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45 |
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46 /** The default chart height, if no other height is set.*/ |
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47 public static final int DEFAULT_CHART_HEIGHT = 400; |
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49 /** The default chart format, if no other height is set.*/ |
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50 public static final String DEFAULT_CHART_FORMAT = "png"; |
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51 |
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52 /** The XPath that points to the chart size of the incoming request |
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53 * document.*/ |
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54 public static final String XPATH_CHART_SIZE = |
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55 "/art:action/art:attributes/art:size"; |
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56 |
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57 public static final String XPATH_CHART_FORMAT = |
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58 "/art:action/art:attributes/art:format/@art:value"; |
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59 |
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60 public static final String XPATH_CHART_X_RANGE = |
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61 "/art:action/art:attributes/art:xrange"; |
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62 |
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63 public static final String XPATH_CHART_Y_RANGE = |
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64 "/art:action/art:attributes/art:yrange"; |
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65 |
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66 |
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67 /** The document of the incoming out() request.*/ |
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68 protected Document request; |
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69 |
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70 /** The output stream where the data should be written to.*/ |
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71 protected OutputStream out; |
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72 |
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73 /** The CallContext object.*/ |
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74 protected CallContext context; |
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75 |
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76 /** The artifact that is used to decorate the chart with meta information.*/ |
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77 protected Artifact master; |
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78 |
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79 |
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80 public void init(Document request, OutputStream out, CallContext context) { |
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81 logger.debug("ChartGenerator.init"); |
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82 |
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83 this.request = request; |
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84 this.out = out; |
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85 this.context = context; |
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86 } |
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87 |
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88 |
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89 public void setMasterArtifact(Artifact master) { |
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90 this.master = master; |
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91 } |
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92 |
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93 |
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94 protected Locale getLocale() { |
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95 CallMeta meta = context.getMeta(); |
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96 PreferredLocale[] prefs = meta.getLanguages(); |
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97 |
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98 int len = prefs != null ? prefs.length : 0; |
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99 |
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100 Locale[] locales = new Locale[len]; |
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101 |
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102 for (int i = 0; i < len; i++) { |
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103 locales[i] = prefs[i].getLocale(); |
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104 } |
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105 |
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106 return meta.getPreferredLocale(locales); |
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107 } |
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108 |
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109 |
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110 protected String msg(String key, String def) { |
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111 return Resources.getMsg(context.getMeta(), key, def); |
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112 } |
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113 |
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114 |
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115 protected String msg(String key, String def, Object[] args) { |
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116 return Resources.getMsg(context.getMeta(), key, def, args); |
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117 } |
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118 |
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119 |
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120 protected String getRiverName() { |
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121 WINFOArtifact flys = (WINFOArtifact) master; |
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122 |
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123 River river = FLYSUtils.getRiver(flys); |
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124 return (river != null) ? river.getName() : ""; |
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125 } |
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126 |
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127 |
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128 protected double[] getRange() { |
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129 WINFOArtifact flys = (WINFOArtifact) master; |
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130 |
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131 return FLYSUtils.getKmRange(flys); |
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132 } |
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133 |
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134 |
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135 /** |
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136 * Returns the size of a chart export as array which has been specified by |
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137 * the incoming request document. |
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138 * |
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139 * @return the size of a chart as [width, height] or the result of |
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140 * getDefaultSize() if no width or height are given in the request document. |
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141 */ |
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142 protected int[] getSize() { |
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143 int[] size = new int[2]; |
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144 |
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145 Element sizeEl = (Element)XMLUtils.xpath( |
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146 request, |
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147 XPATH_CHART_SIZE, |
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148 XPathConstants.NODE, |
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149 ArtifactNamespaceContext.INSTANCE); |
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150 |
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151 if (sizeEl != null) { |
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152 String uri = ArtifactNamespaceContext.NAMESPACE_URI; |
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153 |
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154 String w = sizeEl.getAttributeNS(uri, "width"); |
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155 String h = sizeEl.getAttributeNS(uri, "height"); |
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156 |
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157 if (w.length() > 0 && h.length() > 0) { |
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158 try { |
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159 size[0] = Integer.parseInt(w); |
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160 size[1] = Integer.parseInt(h); |
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161 } |
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162 catch (NumberFormatException nfe) { |
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163 logger.warn("Wrong values for chart width/height."); |
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164 } |
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165 } |
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166 } |
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167 |
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168 return size[0] > 0 && size[1] > 0 ? size : getDefaultSize(); |
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169 } |
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170 |
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171 |
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172 protected String getFormat() { |
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173 String format = (String) XMLUtils.xpath( |
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174 request, |
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175 XPATH_CHART_FORMAT, |
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176 XPathConstants.STRING, |
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177 ArtifactNamespaceContext.INSTANCE); |
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178 |
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179 return format == null || format.length() == 0 |
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180 ? DEFAULT_CHART_FORMAT |
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181 : format; |
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182 } |
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183 |
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184 |
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185 /** |
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186 * Get Range of Domain ("X"-) Axis from request. |
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187 */ |
652
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188 protected Range getDomainAxisRange() { |
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189 Element xrange = (Element)XMLUtils.xpath( |
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190 request, |
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191 XPATH_CHART_X_RANGE, |
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192 XPathConstants.NODE, |
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193 ArtifactNamespaceContext.INSTANCE); |
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194 |
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195 if (xrange == null) { |
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196 return null; |
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197 } |
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198 |
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199 String uri = ArtifactNamespaceContext.NAMESPACE_URI; |
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200 |
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201 String lower = xrange.getAttributeNS(uri, "from"); |
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202 String upper = xrange.getAttributeNS(uri, "to"); |
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203 |
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204 if (lower.length() > 0 && upper.length() > 0) { |
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205 try { |
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206 double from = Double.parseDouble(lower); |
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207 double to = Double.parseDouble(upper); |
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208 |
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209 if (from == 0 && to == 0) { |
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210 logger.debug("No range specified. Lower and upper X == 0"); |
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211 return null; |
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212 } |
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213 |
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214 if (from > to) { |
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215 double tmp = to; |
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216 to = from; |
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217 from = tmp; |
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218 } |
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219 |
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220 return new Range(from, to); |
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221 } |
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222 catch (NumberFormatException nfe) { |
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223 logger.warn("Wrong values for domain axis range."); |
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224 } |
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225 } |
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226 |
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227 return null; |
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228 } |
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229 |
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230 |
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231 protected Range getValueAxisRange() { |
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232 Element yrange = (Element)XMLUtils.xpath( |
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233 request, |
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234 XPATH_CHART_Y_RANGE, |
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235 XPathConstants.NODE, |
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236 ArtifactNamespaceContext.INSTANCE); |
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237 |
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238 if (yrange == null) { |
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239 return null; |
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240 } |
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241 |
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242 |
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243 String uri = ArtifactNamespaceContext.NAMESPACE_URI; |
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244 |
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245 |
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246 String lower = yrange.getAttributeNS(uri, "from"); |
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247 String upper = yrange.getAttributeNS(uri, "to"); |
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248 |
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249 if (lower.length() > 0 && upper.length() > 0) { |
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250 try { |
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251 double from = Double.parseDouble(lower); |
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252 double to = Double.parseDouble(upper); |
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253 |
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254 if (from == 0 && to == 0) { |
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255 logger.debug("No range specified. Lower and upper Y == 0"); |
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256 return null; |
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257 } |
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258 |
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259 return from > to |
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260 ? new Range(to, from) |
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261 : new Range(from, to); |
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262 } |
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263 catch (NumberFormatException nfe) { |
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264 logger.warn("Wrong values for value axis range."); |
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265 } |
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266 } |
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267 |
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268 return null; |
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269 } |
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270 |
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271 |
423
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272 /** |
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273 * Returns the default size of a chart export as array. |
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274 * |
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275 * @return the default size of a chart as [width, height]. |
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276 */ |
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277 protected int[] getDefaultSize() { |
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278 return new int[] { DEFAULT_CHART_WIDTH, DEFAULT_CHART_HEIGHT }; |
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279 } |
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280 |
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281 |
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282 public abstract void doOut( |
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283 ArtifactAndFacet bundle, |
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284 Document attr, |
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285 boolean visible); |
348
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286 |
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287 public abstract void generate() throws IOException; |
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288 } |
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289 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |