Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/exports/sq/SQOverviewGenerator.java @ 7087:ada424214b02 generator-refactoring

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Use Object instead of DOM Element as argument for setup of out generators. First step to remove dependency to XML DOM when using configuration.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 22 Sep 2013 21:05:12 +0200
parents 0a337f0005c2
children 69709f490d92
rev   line source
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4897a58c8746 River artifacts: Added new copyright headers.
Sascha L. Teichmann <teichmann@intevation.de>
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.exports.sq;
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10
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11 import java.awt.image.BufferedImage;
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12 import java.io.IOException;
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13 import java.io.OutputStream;
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14 import java.util.ArrayList;
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15 import java.util.HashMap;
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16 import java.util.List;
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17 import java.util.Map;
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18
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19 import javax.imageio.ImageIO;
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20 import javax.xml.xpath.XPathConstants;
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21
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22 import org.apache.log4j.Logger;
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23 import org.jfree.chart.ChartRenderingInfo;
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24 import org.jfree.chart.JFreeChart;
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25 import org.w3c.dom.Document;
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26 import org.w3c.dom.Element;
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27 import org.w3c.dom.Node;
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28
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29 import org.dive4elements.artifactdatabase.state.ArtifactAndFacet;
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30 import org.dive4elements.artifactdatabase.state.Settings;
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31 import org.dive4elements.artifacts.Artifact;
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32 import org.dive4elements.artifacts.ArtifactDatabaseException;
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33 import org.dive4elements.artifacts.CallContext;
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34 import org.dive4elements.artifacts.common.ArtifactNamespaceContext;
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35 import org.dive4elements.artifacts.common.utils.XMLUtils;
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36 import org.dive4elements.river.artifacts.context.RiverContext;
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37 import org.dive4elements.river.collections.D4EArtifactCollection;
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38 import org.dive4elements.river.exports.ChartGenerator;
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39 import org.dive4elements.river.exports.OutGenerator;
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40 import org.dive4elements.river.exports.OutputHelper;
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41 import org.dive4elements.river.themes.ThemeDocument;
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42
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43 public class SQOverviewGenerator
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44 implements OutGenerator
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45 {
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46 private static Logger logger = Logger.getLogger(SQOverviewGenerator.class);
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47
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48 public static final String XPATH_CHART_SIZE =
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49 "/art:action/art:attributes/art:size";
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50
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51 protected D4EArtifactCollection collection;
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52
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53 protected Artifact master;
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54
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55 protected Settings settings;
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56
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57 protected Document request;
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58
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59 protected OutputStream out;
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60
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61 protected CallContext context;
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62
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63 protected List<JFreeChart> charts;
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64
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65 protected String outName;
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66
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67 @Override
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68 public void setup(Object config) {
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69 logger.debug("SQOverviewGenerator.setup");
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70 }
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71
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72 /**
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73 * Produce output.
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74 * @param artifactAndFacet current facet and artifact.
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75 * @param attr theme for facet
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76 */
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77 @Override
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78 public void doOut(
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79 ArtifactAndFacet artifactAndFacet,
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80 ThemeDocument attr,
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81 boolean visible
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82 ) {
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83 logger.debug("doOut()");
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84
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85 // TODO: Why not using outName for this.
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86
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87 String name = artifactAndFacet.getData(context).toString();
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88 if(name != null) {
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89 logger.debug("name: " + name);
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90 ChartGenerator g =
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91 (ChartGenerator)RiverContext.getOutGenerator(
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92 context,
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93 name,
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94 null);
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95
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96 if (g == null) {
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97 logger.debug("generator is null.");
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98 return;
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99 }
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100
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101 OutputHelper helper = new OutputHelper(master.identifier());
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102 Document collectionAttribute = collection.getAttribute();
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103
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104 try {
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105 Document cAttr = getAttribute(context, collectionAttribute, name);
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106 g.init(name, request, out, context);
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107
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108 helper.doOut(g, name, name, cAttr, context);
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109 JFreeChart chart = g.generateChart();
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110 chart.removeLegend();
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111 charts.add(chart);
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112 }
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113 catch (IOException e) {
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114 logger.warn(e);
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115 }
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116 catch (ArtifactDatabaseException e) {
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117 logger.warn(e);
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118 }
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119 }
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120 }
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121
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122 @Override
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123 public void init(String outName, Document request, OutputStream out, CallContext context) {
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124 this.outName = outName;
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125 this.request = request;
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126 this.out = out;
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127 this.context = context;
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128 charts = new ArrayList<JFreeChart>();
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129 }
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130
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131 @Override
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132 public void setMasterArtifact(Artifact master) {
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133 this.master = master;
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134 }
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135
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136 @Override
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137 public void setCollection(D4EArtifactCollection collection) {
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138 this.collection = collection;
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139 }
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140
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141 @Override
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142 public void generate() throws IOException {
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143 logger.debug("SQOverviewGenerator.generate");
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144
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145 int[] size = getSize();
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146
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147 if (size == null) {
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148 size = new int[] {400, 600};
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149 }
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150 BufferedImage result =
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151 new BufferedImage(size[0], size[1], BufferedImage.TYPE_INT_RGB);
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152 for (int i = 0; i < charts.size(); i++) {
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153 logger.debug("index: " + i);
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154 JFreeChart chart = charts.get(i);
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155 ChartRenderingInfo info = new ChartRenderingInfo();
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156 BufferedImage img =
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157 chart.createBufferedImage(size[0]/2, size[1]/3, info);
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158 int horPos = 0;
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159 int vertPos = 0;
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160 if (i % 2 == 1) {
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161 horPos = size[0]/2;
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162 }
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163 if (i > 1) {
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164 vertPos = (size[1] / 3) * (i / 2);
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165 }
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166 // TODO: Dispose Graphics object!
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167 result.createGraphics().drawImage(img, horPos, vertPos, null);
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168 }
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169 ImageIO.write(result, "png", out);
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170 }
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171
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172 @Override
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173 public void setSettings(Settings settings) {
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174 this.settings = settings;
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175 }
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176
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177 @Override
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178 public Settings getSettings() {
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179 return this.settings;
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180 }
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181
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182
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183 /**
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184 * Returns the "attribute" (part of description document) for a specific
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185 * output type.
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186 *
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187 * @param context The CallContext object.
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188 * @param attr The xml attribute saved at the collection.
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189 * @param output The name of the desired output type.
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190 *
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191 * @return the attribute for the desired output type.
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192 */
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193 protected Document getAttribute(
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194 CallContext context,
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195 Document attr,
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196 String output)
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197 throws ArtifactDatabaseException
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198 {
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199 logger.debug("find specific XML node for Output: " + output);
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200
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201 Map<String, String> vars = new HashMap<String, String>();
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202 vars.put("output", output);
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203
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204 Node out = (Node) XMLUtils.xpath(
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205 attr,
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206 "art:attribute/art:outputs/art:output[@name=$output]",
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207 XPathConstants.NODE,
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208 ArtifactNamespaceContext.INSTANCE,
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209 vars);
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210
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211 if (out != null) {
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212 Document o = XMLUtils.newDocument();
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213 o.appendChild(o.importNode(out, true));
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214
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215 return o;
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216 }
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217
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218 return null;
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219 }
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220
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221
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222 /**
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223 * Returns the size of a chart export as array which has been specified by
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224 * the incoming request document.
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225 *
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226 * @return the size of a chart as [width, height] or null if no width or
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227 * height are given in the request document.
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228 */
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229 protected int[] getSize() {
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230 int[] size = new int[2];
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231
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232 Element sizeEl = (Element)XMLUtils.xpath(
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233 request,
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234 XPATH_CHART_SIZE,
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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 (sizeEl != null) {
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239 String uri = ArtifactNamespaceContext.NAMESPACE_URI;
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240
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241 String w = sizeEl.getAttributeNS(uri, "width");
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242 String h = sizeEl.getAttributeNS(uri, "height");
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243
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244 if (w.length() > 0 && h.length() > 0) {
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245 try {
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246 size[0] = Integer.parseInt(w);
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247 size[1] = Integer.parseInt(h);
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248 }
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249 catch (NumberFormatException nfe) {
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250 logger.warn("Wrong values for chart width/height.");
45af081061e7 Added overview output for sq relation. Currently the overview generator is
Raimund Renkert <raimund.renkert@intevation.de>
parents:
diff changeset
251 }
45af081061e7 Added overview output for sq relation. Currently the overview generator is
Raimund Renkert <raimund.renkert@intevation.de>
parents:
diff changeset
252 }
45af081061e7 Added overview output for sq relation. Currently the overview generator is
Raimund Renkert <raimund.renkert@intevation.de>
parents:
diff changeset
253 }
45af081061e7 Added overview output for sq relation. Currently the overview generator is
Raimund Renkert <raimund.renkert@intevation.de>
parents:
diff changeset
254
45af081061e7 Added overview output for sq relation. Currently the overview generator is
Raimund Renkert <raimund.renkert@intevation.de>
parents:
diff changeset
255 return size[0] > 0 && size[1] > 0 ? size : null;
45af081061e7 Added overview output for sq relation. Currently the overview generator is
Raimund Renkert <raimund.renkert@intevation.de>
parents:
diff changeset
256 }
45af081061e7 Added overview output for sq relation. Currently the overview generator is
Raimund Renkert <raimund.renkert@intevation.de>
parents:
diff changeset
257 }
3304
02d5731b43a2 SQ relation: Build a valid SQResult.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3296
diff changeset
258 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org