Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/exports/ChartGenerator.java @ 695:45cd58a2a2bb facets-slt

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OutGenerators doOut() takes a facet object now instead of just its name. flys-artifacts/branches/facets-slt@2137 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Thu, 16 Jun 2011 14:31:41 +0000
parents 8fa4c5c9cd1a
children 035c0095b427
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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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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13 import org.jfree.data.Range;
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15 import de.intevation.artifacts.Artifact;
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16 import de.intevation.artifacts.CallContext;
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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.artifactdatabase.state.Facet;
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23 import de.intevation.flys.model.River;
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25 import de.intevation.flys.artifacts.FLYSArtifact;
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26 import de.intevation.flys.artifacts.resources.Resources;
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28
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29 /**
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30 * The base class for chart creation. It should provide some basic things that
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31 * equal in all chart types.
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32 *
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33 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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34 */
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35 public abstract class ChartGenerator implements OutGenerator {
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36
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37 private static Logger logger = Logger.getLogger(ChartGenerator.class);
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38
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39
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40 /** The default chart width, if no other width is set.*/
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41 public static final int DEFAULT_CHART_WIDTH = 600;
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42
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43 /** The default chart height, if no other height is set.*/
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44 public static final int DEFAULT_CHART_HEIGHT = 400;
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45
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46 /** The XPath that points to the chart size of the incoming request
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47 * document.*/
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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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51 public static final String XPATH_CHART_X_RANGE =
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52 "/art:action/art:attributes/art:xrange";
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53
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54 public static final String XPATH_CHART_Y_RANGE =
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55 "/art:action/art:attributes/art:yrange";
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58 /** The document of the incoming out() request.*/
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59 protected Document request;
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60
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61 /** The output stream where the data should be written to.*/
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62 protected OutputStream out;
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63
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64 /** The CallContext object.*/
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65 protected CallContext context;
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67 /** The artifact that is used to decorate the chart with meta information.*/
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68 protected Artifact master;
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71 public void init(Document request, OutputStream out, CallContext context) {
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72 logger.debug("ChartGenerator.init");
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73
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74 this.request = request;
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75 this.out = out;
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76 this.context = context;
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77 }
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80 public void setMasterArtifact(Artifact master) {
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81 this.master = master;
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82 }
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83
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84
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85 protected String msg(String key, String def) {
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86 return Resources.getMsg(context.getMeta(), key, def);
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87 }
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90 protected String msg(String key, String def, Object[] args) {
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91 return Resources.getMsg(context.getMeta(), key, def, args);
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92 }
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93
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94
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95 protected String getRiverName() {
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96 FLYSArtifact flys = (FLYSArtifact) master;
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97
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98 River river = flys.getRiver();
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99 return river != null ? river.getName() : "";
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100 }
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101
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102
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103 protected double[] getRange() {
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104 FLYSArtifact flys = (FLYSArtifact) master;
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105
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106 return flys.getDistance();
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107 }
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108
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109
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110 /**
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111 * Returns the size of a chart export as array which has been specified by
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112 * the incoming request document.
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113 *
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114 * @return the size of a chart as [width, height] or the result of
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115 * getDefaultSize() if no width or height are given in the request document.
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116 */
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117 protected int[] getSize() {
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118 int[] size = new int[2];
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119
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120 Node sizeEl = (Node) XMLUtils.xpath(
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121 request,
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122 XPATH_CHART_SIZE,
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123 XPathConstants.NODE,
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diff changeset
124 ArtifactNamespaceContext.INSTANCE);
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125
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126 if (sizeEl != null) {
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127 String w = XMLUtils.xpathString(
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128 sizeEl, "@art:width", ArtifactNamespaceContext.INSTANCE);
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129
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130 String h = XMLUtils.xpathString(
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131 sizeEl, "@art:height", ArtifactNamespaceContext.INSTANCE);
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132
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133 if (w != null && w.length() > 0 && h != null && h.length() > 0) {
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134 try {
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135 size[0] = Integer.parseInt(w);
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136 size[1] = Integer.parseInt(h);
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137 }
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138 catch (NumberFormatException nfe) {
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139 logger.warn("Wrong values for chart width/height.");
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140 }
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141 }
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142 }
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143
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144 return size[0] > 0 && size[1] > 0 ? size : getDefaultSize();
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145 }
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146
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147
652
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148 protected Range getDomainAxisRange() {
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149 Node xrange = (Node) XMLUtils.xpath(
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150 request,
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151 XPATH_CHART_X_RANGE,
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152 XPathConstants.NODE,
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153 ArtifactNamespaceContext.INSTANCE);
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154
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155 if (xrange == null) {
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156 return null;
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157 }
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158
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159 String lower = XMLUtils.xpathString(
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160 xrange, "@art:from", ArtifactNamespaceContext.INSTANCE);
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161
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162 String upper = XMLUtils.xpathString(
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163 xrange, "@art:to", ArtifactNamespaceContext.INSTANCE);
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164
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165 logger.debug("FOUND X RANGE: " + lower + " -> " + upper);
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166
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167 if (lower != null && upper != null) {
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168 try {
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169 double from = Double.parseDouble(lower);
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170 double to = Double.parseDouble(upper);
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171
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172 if (from == 0 && to == 0) {
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173 logger.debug("No range specified. Lower and upper X == 0");
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174 return null;
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175 }
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176
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177 if (from > to) {
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178 double tmp = to;
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179 to = from;
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180 from = tmp;
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181 }
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182
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183 return new Range(from, to);
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184 }
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diff changeset
185 catch (NumberFormatException nfe) {
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186 logger.warn("Wrong values for domain axis range.");
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187 }
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188 }
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diff changeset
189
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diff changeset
190 return null;
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191 }
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192
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193
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diff changeset
194 protected Range getValueAxisRange() {
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diff changeset
195 Node yrange = (Node) XMLUtils.xpath(
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diff changeset
196 request,
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diff changeset
197 XPATH_CHART_Y_RANGE,
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diff changeset
198 XPathConstants.NODE,
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diff changeset
199 ArtifactNamespaceContext.INSTANCE);
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200
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diff changeset
201 if (yrange == null) {
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diff changeset
202 return null;
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diff changeset
203 }
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diff changeset
204
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diff changeset
205 String lower = XMLUtils.xpathString(
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diff changeset
206 yrange, "@art:from", ArtifactNamespaceContext.INSTANCE);
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diff changeset
207
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diff changeset
208 String upper = XMLUtils.xpathString(
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diff changeset
209 yrange, "@art:to", ArtifactNamespaceContext.INSTANCE);
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diff changeset
210
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diff changeset
211 if (lower != null && upper != null) {
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diff changeset
212 try {
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diff changeset
213 double from = Double.parseDouble(lower);
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diff changeset
214 double to = Double.parseDouble(upper);
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diff changeset
215
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diff changeset
216 if (from == 0 && to == 0) {
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diff changeset
217 logger.debug("No range specified. Lower and upper Y == 0");
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diff changeset
218 return null;
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diff changeset
219 }
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diff changeset
220
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diff changeset
221 if (from > to) {
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diff changeset
222 double tmp = to;
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diff changeset
223 to = from;
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diff changeset
224 from = tmp;
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diff changeset
225 }
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diff changeset
226
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diff changeset
227 return new Range(from, to);
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diff changeset
228 }
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diff changeset
229 catch (NumberFormatException nfe) {
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230 logger.warn("Wrong values for value axis range.");
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231 }
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232 }
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233
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234 return null;
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235 }
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236
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237
423
bab867fb37e8 Charts are generated using the size defined in the incoming request document.
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238 /**
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239 * Returns the default size of a chart export as array.
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240 *
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241 * @return the default size of a chart as [width, height].
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242 */
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243 protected int[] getDefaultSize() {
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244 return new int[] { DEFAULT_CHART_WIDTH, DEFAULT_CHART_HEIGHT };
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245 }
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246
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247
695
45cd58a2a2bb OutGenerators doOut() takes a facet object now instead of just its name.
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248 public abstract void doOut(Artifact artifact, Facet facet, Document attr);
348
635af5381a4d Added an abstract OutGenerator that should be the base class for all generators which create charts.
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249
635af5381a4d Added an abstract OutGenerator that should be the base class for all generators which create charts.
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250 public abstract void generate() throws IOException;
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251 }
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252 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org