Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/exports/sq/SQOverviewGenerator.java @ 5838:5aa05a7a34b7

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Rename modules to more fitting names.
author Sascha L. Teichmann <teichmann@intevation.de>
date Thu, 25 Apr 2013 15:23:37 +0200
parents flys-artifacts/src/main/java/org/dive4elements/river/exports/sq/SQOverviewGenerator.java@bd047b71ab37
children 4897a58c8746
rev   line source
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1 package org.dive4elements.river.exports.sq;
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2
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3 import java.awt.image.BufferedImage;
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4 import java.io.IOException;
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5 import java.io.OutputStream;
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6 import java.util.ArrayList;
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7 import java.util.HashMap;
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8 import java.util.List;
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9 import java.util.Map;
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10
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11 import javax.imageio.ImageIO;
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12 import javax.xml.xpath.XPathConstants;
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13
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14 import org.apache.log4j.Logger;
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15 import org.jfree.chart.ChartRenderingInfo;
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16 import org.jfree.chart.JFreeChart;
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17 import org.w3c.dom.Document;
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18 import org.w3c.dom.Element;
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19 import org.w3c.dom.Node;
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20
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21 import org.dive4elements.artifactdatabase.state.ArtifactAndFacet;
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22 import org.dive4elements.artifactdatabase.state.Settings;
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23 import org.dive4elements.artifacts.Artifact;
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24 import org.dive4elements.artifacts.ArtifactDatabaseException;
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25 import org.dive4elements.artifacts.CallContext;
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26 import org.dive4elements.artifacts.common.ArtifactNamespaceContext;
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27 import org.dive4elements.artifacts.common.utils.XMLUtils;
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28 import org.dive4elements.river.artifacts.context.FLYSContext;
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29 import org.dive4elements.river.collections.FLYSArtifactCollection;
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30 import org.dive4elements.river.exports.ChartGenerator;
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31 import org.dive4elements.river.exports.OutGenerator;
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32 import org.dive4elements.river.exports.OutputHelper;
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33
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34 public class SQOverviewGenerator
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35 implements OutGenerator
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36 {
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37 private static Logger logger = Logger.getLogger(SQOverviewGenerator.class);
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38
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39 public static final String XPATH_CHART_SIZE =
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40 "/art:action/art:attributes/art:size";
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41
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42 protected FLYSArtifactCollection collection;
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43
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44 protected Artifact master;
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45
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46 protected Settings settings;
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47
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48 protected Document request;
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49
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50 protected OutputStream out;
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51
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52 protected CallContext context;
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53
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54 protected List<JFreeChart> charts;
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55
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56 /**
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57 * Produce output.
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58 * @param artifactAndFacet current facet and artifact.
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59 * @param attr theme for facet
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60 */
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61 @Override
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62 public void doOut(
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63 ArtifactAndFacet artifactAndFacet,
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64 Document attr,
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65 boolean visible
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66 ) {
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67 logger.debug("doOut()");
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68
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69 String name = artifactAndFacet.getData(context).toString();
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70 if(name != null) {
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71 logger.debug("name: " + name);
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72 ChartGenerator g =
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73 (ChartGenerator)FLYSContext.getOutGenerator(
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74 context,
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75 name,
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76 null);
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77
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78 if (g == null) {
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79 logger.debug("generator is null.");
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80 return;
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81 }
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82
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83 OutputHelper helper = new OutputHelper(master.identifier());
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84 Document collectionAttribute = collection.getAttribute();
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85
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86 try {
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87 Document cAttr = getAttribute(context, collectionAttribute, name);
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88 g.init(request, out, context);
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89
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90 helper.doOut(g, name, name, cAttr, context);
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91 JFreeChart chart = g.generateChart();
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92 chart.removeLegend();
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93 charts.add(chart);
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94 }
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95 catch (IOException e) {
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96 logger.warn(e);
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97 }
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98 catch (ArtifactDatabaseException e) {
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99 logger.warn(e);
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100 }
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101 }
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102 }
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103
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104 @Override
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105 public void init(Document request, OutputStream out, CallContext context) {
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106 this.request = request;
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107 this.out = out;
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108 this.context = context;
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109 charts = new ArrayList<JFreeChart>();
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110 }
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111
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112 @Override
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113 public void setMasterArtifact(Artifact master) {
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114 this.master = master;
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115 }
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116
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117 @Override
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118 public void setCollection(FLYSArtifactCollection collection) {
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119 this.collection = collection;
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120 }
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121
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122 @Override
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123 public void generate() throws IOException {
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124 logger.debug("SQOverviewGenerator.generate");
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125
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126 int[] size = getSize();
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127
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128 if (size == null) {
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129 size = new int[] {400, 600};
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130 }
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131 BufferedImage result =
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132 new BufferedImage(size[0], size[1], BufferedImage.TYPE_INT_RGB);
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133 for (int i = 0; i < charts.size(); i++) {
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134 logger.debug("index: " + i);
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135 JFreeChart chart = charts.get(i);
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136 ChartRenderingInfo info = new ChartRenderingInfo();
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137 BufferedImage img =
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138 chart.createBufferedImage(size[0]/2, size[1]/3, info);
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139 int horPos = 0;
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140 int vertPos = 0;
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141 if (i % 2 == 1) {
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142 horPos = size[0]/2;
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143 }
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144 if (i > 1) {
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145 vertPos = (size[1] / 3) * (i / 2);
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146 }
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147 result.createGraphics().drawImage(img, horPos, vertPos, null);
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148 }
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149 ImageIO.write(result, "png", out);
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150 }
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151
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152 @Override
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153 public void setSettings(Settings settings) {
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154 this.settings = settings;
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155 }
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156
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157 @Override
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158 public Settings getSettings() {
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159 return this.settings;
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160 }
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161
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162
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163 /**
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164 * Returns the "attribute" (part of description document) for a specific
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165 * output type.
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166 *
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167 * @param context The CallContext object.
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118fe1cc8cc8 OutGenerators got a setCollection() method; analogous to setMasterArtifact(). Registered the SQOverviewGenerator as OutGenerator for 'sq_overview' Output.
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168 * @param attr The xml attribute saved at the collection.
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169 * @param output The name of the desired output type.
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170 *
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171 * @return the attribute for the desired output type.
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172 */
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173 protected Document getAttribute(
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118fe1cc8cc8 OutGenerators got a setCollection() method; analogous to setMasterArtifact(). Registered the SQOverviewGenerator as OutGenerator for 'sq_overview' Output.
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174 CallContext context,
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175 Document attr,
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176 String output)
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177 throws ArtifactDatabaseException
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178 {
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179 logger.debug("find specific XML node for Output: " + output);
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180
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181 Map<String, String> vars = new HashMap<String, String>();
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182 vars.put("output", output);
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183
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184 Node out = (Node) XMLUtils.xpath(
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185 attr,
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186 "art:attribute/art:outputs/art:output[@name=$output]",
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187 XPathConstants.NODE,
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188 ArtifactNamespaceContext.INSTANCE,
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189 vars);
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190
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191 if (out != null) {
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192 Document o = XMLUtils.newDocument();
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193 o.appendChild(o.importNode(out, true));
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194
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195 return o;
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196 }
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197
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198 return null;
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199 }
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200
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201
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202 /**
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203 * Returns the size of a chart export as array which has been specified by
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204 * the incoming request document.
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205 *
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206 * @return the size of a chart as [width, height] or null if no width or
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207 * height are given in the request document.
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208 */
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209 protected int[] getSize() {
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210 int[] size = new int[2];
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211
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212 Element sizeEl = (Element)XMLUtils.xpath(
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213 request,
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214 XPATH_CHART_SIZE,
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215 XPathConstants.NODE,
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216 ArtifactNamespaceContext.INSTANCE);
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217
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218 if (sizeEl != null) {
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219 String uri = ArtifactNamespaceContext.NAMESPACE_URI;
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220
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221 String w = sizeEl.getAttributeNS(uri, "width");
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222 String h = sizeEl.getAttributeNS(uri, "height");
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223
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224 if (w.length() > 0 && h.length() > 0) {
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225 try {
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226 size[0] = Integer.parseInt(w);
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227 size[1] = Integer.parseInt(h);
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228 }
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229 catch (NumberFormatException nfe) {
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230 logger.warn("Wrong values for chart width/height.");
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231 }
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232 }
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233 }
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234
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235 return size[0] > 0 && size[1] > 0 ? size : null;
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236 }
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237 }
3304
02d5731b43a2 SQ relation: Build a valid SQResult.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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238 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org