Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/exports/ChartGenerator.java @ 1979:a7c437c9547e
Added a getSettings() operation to OutGenerator - FLYSArtifactCollection will now evaluate all available Outputs and create initial Settings using OutGenerators if the Settings for an Output is missing.
flys-artifacts/trunk@3409 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Wed, 14 Dec 2011 10:20:56 +0000 |
parents | 65f9d707caff |
children | 0318fa6f0844 |
rev | line source |
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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 import java.util.Locale; |
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6 |
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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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15 |
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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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Added a getSettings() operation to OutGenerator - FLYSArtifactCollection will now evaluate all available Outputs and create initial Settings using OutGenerators if the Settings for an Output is missing.
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24 import de.intevation.artifactdatabase.state.ArtifactAndFacet; |
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25 import de.intevation.artifactdatabase.state.Settings; |
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26 |
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27 import de.intevation.flys.model.River; |
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28 |
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29 import de.intevation.flys.artifacts.WINFOArtifact; |
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30 |
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Enabled i18n support for charts.
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31 import de.intevation.flys.artifacts.resources.Resources; |
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32 import de.intevation.flys.utils.FLYSUtils; |
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33 |
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34 |
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35 /** |
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36 * The base class for chart creation. It should provide some basic things that |
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37 * equal in all chart types. |
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38 * |
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39 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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40 */ |
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41 public abstract class ChartGenerator implements OutGenerator { |
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42 |
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43 private static Logger logger = Logger.getLogger(ChartGenerator.class); |
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44 |
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45 /** The default chart width, if no other width is set. */ |
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46 public static final int DEFAULT_CHART_WIDTH = 600; |
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47 |
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48 /** The default chart height, if no other height is set.*/ |
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49 public static final int DEFAULT_CHART_HEIGHT = 400; |
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50 |
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51 /** The default chart format, if no other height is set.*/ |
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52 public static final String DEFAULT_CHART_FORMAT = "png"; |
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53 |
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54 /** The XPath that points to the chart size of the incoming request |
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55 * document.*/ |
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56 public static final String XPATH_CHART_SIZE = |
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57 "/art:action/art:attributes/art:size"; |
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58 |
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59 public static final String XPATH_CHART_FORMAT = |
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60 "/art:action/art:attributes/art:format/@art:value"; |
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61 |
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62 public static final String XPATH_CHART_X_RANGE = |
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63 "/art:action/art:attributes/art:xrange"; |
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64 |
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65 public static final String XPATH_CHART_Y_RANGE = |
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66 "/art:action/art:attributes/art:yrange"; |
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67 |
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68 |
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69 /** The document of the incoming out() request.*/ |
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70 protected Document request; |
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71 |
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72 /** The output stream where the data should be written to.*/ |
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73 protected OutputStream out; |
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74 |
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75 /** The CallContext object.*/ |
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76 protected CallContext context; |
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77 |
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78 /** The artifact that is used to decorate the chart with meta information.*/ |
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79 protected Artifact master; |
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80 |
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81 |
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82 public void init(Document request, OutputStream out, CallContext context) { |
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83 logger.debug("ChartGenerator.init"); |
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84 |
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85 this.request = request; |
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86 this.out = out; |
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87 this.context = context; |
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88 } |
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89 |
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90 |
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91 public void setMasterArtifact(Artifact master) { |
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92 this.master = master; |
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93 } |
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94 |
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95 |
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96 protected Locale getLocale() { |
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97 CallMeta meta = context.getMeta(); |
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98 PreferredLocale[] prefs = meta.getLanguages(); |
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99 |
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100 int len = prefs != null ? prefs.length : 0; |
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101 |
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102 Locale[] locales = new Locale[len]; |
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103 |
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104 for (int i = 0; i < len; i++) { |
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105 locales[i] = prefs[i].getLocale(); |
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106 } |
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107 |
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108 return meta.getPreferredLocale(locales); |
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109 } |
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110 |
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111 |
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112 protected String msg(String key, String def) { |
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113 return Resources.getMsg(context.getMeta(), key, def); |
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114 } |
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115 |
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116 |
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117 protected String msg(String key, String def, Object[] args) { |
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118 return Resources.getMsg(context.getMeta(), key, def, args); |
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119 } |
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120 |
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121 |
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122 protected String getRiverName() { |
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123 WINFOArtifact flys = (WINFOArtifact) master; |
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124 |
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125 River river = FLYSUtils.getRiver(flys); |
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126 return (river != null) ? river.getName() : ""; |
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127 } |
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128 |
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129 |
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130 protected double[] getRange() { |
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131 WINFOArtifact flys = (WINFOArtifact) master; |
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132 |
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133 return FLYSUtils.getKmRange(flys); |
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134 } |
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135 |
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136 |
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137 /** |
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138 * Returns the size of a chart export as array which has been specified by |
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139 * the incoming request document. |
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140 * |
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141 * @return the size of a chart as [width, height] or the result of |
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142 * getDefaultSize() if no width or height are given in the request document. |
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143 */ |
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144 protected int[] getSize() { |
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145 int[] size = new int[2]; |
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146 |
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147 Element sizeEl = (Element)XMLUtils.xpath( |
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148 request, |
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149 XPATH_CHART_SIZE, |
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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 (sizeEl != null) { |
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154 String uri = ArtifactNamespaceContext.NAMESPACE_URI; |
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155 |
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156 String w = sizeEl.getAttributeNS(uri, "width"); |
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157 String h = sizeEl.getAttributeNS(uri, "height"); |
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158 |
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159 if (w.length() > 0 && h.length() > 0) { |
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160 try { |
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161 size[0] = Integer.parseInt(w); |
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162 size[1] = Integer.parseInt(h); |
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163 } |
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164 catch (NumberFormatException nfe) { |
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165 logger.warn("Wrong values for chart width/height."); |
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166 } |
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167 } |
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168 } |
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169 |
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170 return size[0] > 0 && size[1] > 0 ? size : getDefaultSize(); |
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171 } |
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172 |
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173 |
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174 protected String getFormat() { |
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175 String format = (String) XMLUtils.xpath( |
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176 request, |
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177 XPATH_CHART_FORMAT, |
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178 XPathConstants.STRING, |
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179 ArtifactNamespaceContext.INSTANCE); |
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180 |
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181 return format == null || format.length() == 0 |
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182 ? DEFAULT_CHART_FORMAT |
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183 : format; |
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184 } |
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185 |
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186 |
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187 /** |
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188 * Get Range of Domain ("X"-) Axis from request. |
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189 */ |
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190 protected Range getDomainAxisRange() { |
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191 Element xrange = (Element)XMLUtils.xpath( |
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192 request, |
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193 XPATH_CHART_X_RANGE, |
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194 XPathConstants.NODE, |
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195 ArtifactNamespaceContext.INSTANCE); |
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196 |
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197 if (xrange == null) { |
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198 return null; |
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199 } |
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200 |
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201 String uri = ArtifactNamespaceContext.NAMESPACE_URI; |
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202 |
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203 String lower = xrange.getAttributeNS(uri, "from"); |
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204 String upper = xrange.getAttributeNS(uri, "to"); |
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205 |
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206 if (lower.length() > 0 && upper.length() > 0) { |
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207 try { |
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208 double from = Double.parseDouble(lower); |
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209 double to = Double.parseDouble(upper); |
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210 |
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211 if (from == 0 && to == 0) { |
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212 logger.debug("No range specified. Lower and upper X == 0"); |
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213 return null; |
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214 } |
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215 |
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216 if (from > to) { |
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217 double tmp = to; |
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218 to = from; |
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219 from = tmp; |
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220 } |
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221 |
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222 return new Range(from, to); |
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223 } |
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224 catch (NumberFormatException nfe) { |
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225 logger.warn("Wrong values for domain axis range."); |
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226 } |
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227 } |
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228 |
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229 return null; |
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230 } |
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231 |
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232 |
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233 protected Range getValueAxisRange() { |
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234 Element yrange = (Element)XMLUtils.xpath( |
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235 request, |
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236 XPATH_CHART_Y_RANGE, |
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237 XPathConstants.NODE, |
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238 ArtifactNamespaceContext.INSTANCE); |
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239 |
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240 if (yrange == null) { |
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241 return null; |
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242 } |
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243 |
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244 |
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245 String uri = ArtifactNamespaceContext.NAMESPACE_URI; |
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246 |
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247 |
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248 String lower = yrange.getAttributeNS(uri, "from"); |
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249 String upper = yrange.getAttributeNS(uri, "to"); |
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250 |
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251 if (lower.length() > 0 && upper.length() > 0) { |
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252 try { |
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253 double from = Double.parseDouble(lower); |
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254 double to = Double.parseDouble(upper); |
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255 |
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256 if (from == 0 && to == 0) { |
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257 logger.debug("No range specified. Lower and upper Y == 0"); |
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258 return null; |
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259 } |
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260 |
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261 return from > to |
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262 ? new Range(to, from) |
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263 : new Range(from, to); |
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264 } |
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265 catch (NumberFormatException nfe) { |
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266 logger.warn("Wrong values for value axis range."); |
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267 } |
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268 } |
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269 |
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270 return null; |
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271 } |
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272 |
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273 |
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274 /** |
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275 * Returns the default size of a chart export as array. |
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276 * |
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277 * @return the default size of a chart as [width, height]. |
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278 */ |
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279 protected int[] getDefaultSize() { |
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280 return new int[] { DEFAULT_CHART_WIDTH, DEFAULT_CHART_HEIGHT }; |
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281 } |
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282 |
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283 |
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284 public abstract void doOut( |
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285 ArtifactAndFacet bundle, |
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286 Document attr, |
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287 boolean visible); |
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288 |
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289 public abstract void generate() throws IOException; |
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290 |
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291 |
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292 /** |
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293 * Returns an instance of <i>EmptySettings</i> currently! |
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294 * |
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295 * @return an instance of <i>EmptySettings</i>. |
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296 */ |
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297 public Settings getSettings() { |
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298 return new EmptySettings(); |
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299 } |
348
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300 } |
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301 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |