Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/exports/AbstractExporter.java @ 9801:1d7a72a50183 3.2.x tip

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Assume Compose V2, consistently
author Tom Gottfried <tom@intevation.de>
date Thu, 23 Nov 2023 10:14:13 +0100
parents 0a5239a1e46e
children
rev   line source
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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;
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10
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11 import java.io.IOException;
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12 import java.io.OutputStream;
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13 import java.io.OutputStreamWriter;
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14
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15 import java.text.NumberFormat;
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16
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17 import org.w3c.dom.Document;
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18
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19 import org.apache.logging.log4j.Logger;
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20 import org.apache.logging.log4j.LogManager;
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21
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22 import au.com.bytecode.opencsv.CSVWriter;
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23
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24 import org.dive4elements.artifacts.Artifact;
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25 import org.dive4elements.artifacts.CallContext;
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27 import org.dive4elements.artifactdatabase.state.ArtifactAndFacet;
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28 import org.dive4elements.artifactdatabase.state.Settings;
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29
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30 import org.dive4elements.artifacts.common.ArtifactNamespaceContext;
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31 import org.dive4elements.artifacts.common.utils.XMLUtils;
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32
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33 import org.dive4elements.river.artifacts.resources.Resources;
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34 import org.dive4elements.river.collections.D4EArtifactCollection;
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35
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36 import org.dive4elements.river.themes.ThemeDocument;
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37 import org.dive4elements.river.utils.Formatter;
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38
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39
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40 /**
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41 * Abstract exporter that implements some basic methods for exporting data of
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42 * artifacts.
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43 *
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44 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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45 */
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46 public abstract class AbstractExporter implements OutGenerator {
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47
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48 /** The log used in this exporter.*/
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49 private static Logger log = LogManager.getLogger(AbstractExporter.class);
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50
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51 /* XXX: Why does AbstractExporter do not implement FacetTypes? */
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52 public static String FIX_PARAMETERS = "fix_parameters";
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53
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54 /** The name of the CSV facet which triggers the CSV creation. */
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55 public static final String FACET_CSV = "csv";
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56
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57 /** The name of the PDF facet which triggers the PDF creation. */
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58 public static final String FACET_PDF = "pdf";
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59
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60 /** The default charset for the CSV export. */
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61 public static final String DEFAULT_CSV_CHARSET = "UTF-8";
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62
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63 /** The default separator for the CSV export. */
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64 public static final char DEFAULT_CSV_SEPARATOR = ';';
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65
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66 public static final String START_META_CHAR = "#";
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67
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68 /** XPath that points to the desired export facet. */
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69 public static final String XPATH_FACET = "/art:action/@art:type";
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70
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71 /** The out name to serve. */
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72 protected String outName;
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73
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74 /** The document of the incoming out() request. */
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75 protected Document request;
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76
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77 /** The output stream where the data should be written to. */
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78 protected OutputStream out;
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79
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80 /** The CallContext object. */
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81 protected CallContext context;
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82
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83 /** The selected facet. */
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84 protected String facet;
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85
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86 /** The collection.*/
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87 protected D4EArtifactCollection collection;
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88
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89 /** The master artifact. */
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90 protected Artifact master;
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91
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92 private NumberFormat kmFormat;
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93
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94 private NumberFormat wFormat;
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95
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96 private NumberFormat qFormat;
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97
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98
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99 /**
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100 * Concrete subclasses need to use this method to write their special data
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101 * objects into the CSV document.
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102 *
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103 * @param writer The CSVWriter.
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104 */
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105 protected abstract void writeCSVData(CSVWriter writer) throws IOException;
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106
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107
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108 /**
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109 * Write lines of informative content to CSV file.
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110 * Usually this will be done above the column headers from within
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111 * the implementation of writeCSVData in concret subclasses.
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112 *
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113 * @param writer The CSVWriter
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114 * @param infolines Array of Strings with informative content.
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115 * Each will be written to a separate line prefixed with START_META_CHAR.
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116 */
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117 protected void writeCSVInfo(CSVWriter writer, String[] infolines) {
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118 String[] metaline = new String[1];
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119
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120 for (String infoline: infolines) {
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121 metaline[0] = START_META_CHAR + " " + infoline;
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122 writer.writeNext(metaline);
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123 }
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124
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125 }
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126
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127 /**
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128 * Concrete subclasses need to use this method to write their special data
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129 * objects into the PDF document.
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130 */
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131 protected abstract void writePDF(OutputStream out);
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132
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133
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134 /**
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135 * This method enables concrete subclasses to collected its own special
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136 * data.
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137 *
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138 * @param data The artifact that stores the data that has to be
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139 * exported.
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140 */
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141 protected abstract void addData(Object data);
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142
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143 public void setup(Object config) {
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144 log.debug("AbstractExporter.setup");
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145 }
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146
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147
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148 @Override
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149 public void init(
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150 String outName,
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151 Document request,
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152 OutputStream out,
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153 CallContext context
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154 ) {
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155 log.debug("AbstractExporter.init");
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156
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157 this.outName = outName;
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158 this.request = request;
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159 this.out = out;
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160 this.context = context;
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161 }
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162
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163
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164 @Override
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165 public void setMasterArtifact(Artifact master) {
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166 this.master = master;
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167 }
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168
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169 /** Get the callcontext that this exporter has been initialized
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170 * with. */
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171 public CallContext getCallContext() {
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172 return this.context;
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173 }
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174
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175
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176 @Override
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177 public void setCollection(D4EArtifactCollection collection) {
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178 this.collection = collection;
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179 }
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180
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181
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182 /**
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183 * This doOut() just collects the data of multiple artifacts. Therefore, it
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184 * makes use of the addData() method which enables concrete subclasses to
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185 * store its data on its own. The real output creation takes place in the
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186 * concrete generate() methods.
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187 *
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188 * @param artifactFacet The artifact and facet.
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189 * The facet to add - NOTE: the facet needs to fit to the first
391
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190 * facet inserted into this exporter. Otherwise this artifact/facet is
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191 * skipped.
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192 * @param attr The attr document.
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193 */
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194 @Override
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195 public void doOut(
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196 ArtifactAndFacet artifactFacet,
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197 ThemeDocument attr,
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198 boolean visible
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199 ) {
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200 String name = artifactFacet.getFacetName();
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201
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202 log.debug("AbstractExporter.doOut: " + name);
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203
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204 if (!isFacetValid(name)) {
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205 log.warn("Facet '" + name + "' not valid. No output created!");
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206 return;
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207 }
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208
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209 addData(artifactFacet.getData(context));
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210 }
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211
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212
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213 /**
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214 * Generates an export based on a specified facet.
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215 */
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216 @Override
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217 public void generate()
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218 throws IOException
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219 {
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220 log.debug("AbstractExporter.generate");
391
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221
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222 if (facet == null) {
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223 throw new IOException("invalid (null) facet for exporter");
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224 }
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225
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226 if (facet.equals(FACET_CSV)) {
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227 generateCSV();
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228 }
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229 else if (facet.equals(FACET_PDF)) {
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230 generatePDF();
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231 }
391
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232 else {
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233 throw new IOException(
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234 "invalid facet for exporter: '" + facet + "'");
391
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235 }
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236 }
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237
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238
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239 /**
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240 * Determines if the desired facet is valid for this exporter. If no facet
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241 * is currently set, <i>facet</i> is set.
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242 *
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243 * @param facet The desired facet.
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244 *
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245 * @return true, if <i>facet</i> is valid, otherwise false.
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246 */
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247 protected boolean isFacetValid(String facet) {
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248 log.debug("AbstractExporter.isFacetValid : "
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249 + facet + " (" + getFacet() + ")" );
391
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250
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251 String thisFacet = getFacet();
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252
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253 if (thisFacet == null || thisFacet.length() == 0) {
391
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254 return false;
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255 }
445
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256 else if (facet == null || facet.length() == 0) {
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257 return false;
391
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258 }
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259 else {
445
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260 return thisFacet.equals(facet);
391
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261 }
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262 }
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263
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264
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265 /**
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266 * Returns the name of the desired facet.
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267 *
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268 * @return the name of the desired facet.
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269 */
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270 protected String getFacet() {
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271 if (facet == null) {
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272 facet = getFacetFromRequest();
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273 }
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274
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275 return facet;
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276 }
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277
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278
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279 /**
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280 * Extracts the name of the requested facet from request document.
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281 *
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282 * @return the name of the requested facet.
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283 */
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284 protected String getFacetFromRequest() {
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285 return XMLUtils.xpathString(
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286 request, XPATH_FACET, ArtifactNamespaceContext.INSTANCE);
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287 }
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288
7936
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289 protected String msg(String key) {
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290 return Resources.getMsg(context.getMeta(), key, key);
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291 }
416
340dc41a7ea3 The CSV exports will now have headers.
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292
340dc41a7ea3 The CSV exports will now have headers.
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293 protected String msg(String key, String def) {
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294 return Resources.getMsg(context.getMeta(), key, def);
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295 }
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296
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297 protected String msg(String key, Object[] args) {
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298 return Resources.getMsg(context.getMeta(), key, key, args);
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299 }
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300
5133
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301 protected String msg(String key, String def, Object[] args) {
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302 return Resources.getMsg(context.getMeta(), key, def, args);
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303 }
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304
416
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305
391
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306 /**
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307 * This method starts CSV creation. It makes use of writeCSVData() which has
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308 * to be implemented by concrete subclasses.
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309 */
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310 protected void generateCSV()
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311 throws IOException
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312 {
8202
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313 log.info("AbstractExporter.generateCSV");
391
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314
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a707ef048188 Insert CR and LF at the end of each line in CSV exports.
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315 char quote = '"';
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316 char escape = '\\';
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317
391
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318 CSVWriter writer = new CSVWriter(
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319 new OutputStreamWriter(
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320 out,
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321 DEFAULT_CSV_CHARSET),
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322 DEFAULT_CSV_SEPARATOR, quote, escape, "\r\n");
391
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323
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324 writeCSVData(writer);
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325
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326 writer.close();
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327 }
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.
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parents: 1948
diff changeset
328
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.
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diff changeset
329
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.
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diff changeset
330 /**
2176
65dac9cf6ff5 Issue 138.
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331 * This method starts PDF creation.
65dac9cf6ff5 Issue 138.
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332 */
65dac9cf6ff5 Issue 138.
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diff changeset
333 protected void generatePDF()
65dac9cf6ff5 Issue 138.
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diff changeset
334 throws IOException
65dac9cf6ff5 Issue 138.
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parents: 2047
diff changeset
335 {
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336 log.info("AbstractExporter.generatePDF");
2176
65dac9cf6ff5 Issue 138.
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diff changeset
337 writePDF(this.out);
65dac9cf6ff5 Issue 138.
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diff changeset
338 }
65dac9cf6ff5 Issue 138.
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diff changeset
339
65dac9cf6ff5 Issue 138.
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parents: 2047
diff changeset
340
65dac9cf6ff5 Issue 138.
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parents: 2047
diff changeset
341 /**
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.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1948
diff changeset
342 * Returns an instance of <i>EmptySettings</i> currently!
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.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1948
diff changeset
343 *
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.
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parents: 1948
diff changeset
344 * @return an instance of <i>EmptySettings</i>.
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.
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diff changeset
345 */
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.
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parents: 1948
diff changeset
346 public Settings getSettings() {
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.
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diff changeset
347 return new EmptySettings();
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.
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parents: 1948
diff changeset
348 }
2047
0318fa6f0844 Make use of first attributes specified in the ChartSettings. NOTE: work is still in progress.
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diff changeset
349
0318fa6f0844 Make use of first attributes specified in the ChartSettings. NOTE: work is still in progress.
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diff changeset
350
0318fa6f0844 Make use of first attributes specified in the ChartSettings. NOTE: work is still in progress.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 2038
diff changeset
351 /**
0318fa6f0844 Make use of first attributes specified in the ChartSettings. NOTE: work is still in progress.
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parents: 2038
diff changeset
352 * This method is not implemented. Override it in subclasses if those need a
0318fa6f0844 Make use of first attributes specified in the ChartSettings. NOTE: work is still in progress.
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parents: 2038
diff changeset
353 * <i>Settings</i> object.
0318fa6f0844 Make use of first attributes specified in the ChartSettings. NOTE: work is still in progress.
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diff changeset
354 */
0318fa6f0844 Make use of first attributes specified in the ChartSettings. NOTE: work is still in progress.
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diff changeset
355 public void setSettings(Settings settings) {
0318fa6f0844 Make use of first attributes specified in the ChartSettings. NOTE: work is still in progress.
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parents: 2038
diff changeset
356 // do nothing
0318fa6f0844 Make use of first attributes specified in the ChartSettings. NOTE: work is still in progress.
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diff changeset
357 }
2284
5d1ba04d2f68 Refactored Formatter access to ease reuse.
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diff changeset
358
5d1ba04d2f68 Refactored Formatter access to ease reuse.
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parents: 2176
diff changeset
359
5d1ba04d2f68 Refactored Formatter access to ease reuse.
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diff changeset
360 /**
5d1ba04d2f68 Refactored Formatter access to ease reuse.
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parents: 2176
diff changeset
361 * Returns the number formatter for kilometer values.
5d1ba04d2f68 Refactored Formatter access to ease reuse.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 2176
diff changeset
362 *
5d1ba04d2f68 Refactored Formatter access to ease reuse.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 2176
diff changeset
363 * @return the number formatter for kilometer values.
5d1ba04d2f68 Refactored Formatter access to ease reuse.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 2176
diff changeset
364 */
5d1ba04d2f68 Refactored Formatter access to ease reuse.
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diff changeset
365 protected NumberFormat getKmFormatter() {
5111
4898376c680b AbstractExporter: keep km-, w- and q-formatter instances.
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parents: 5102
diff changeset
366 if (kmFormat == null) {
4898376c680b AbstractExporter: keep km-, w- and q-formatter instances.
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parents: 5102
diff changeset
367 kmFormat = Formatter.getWaterlevelKM(context);
4898376c680b AbstractExporter: keep km-, w- and q-formatter instances.
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parents: 5102
diff changeset
368 }
4898376c680b AbstractExporter: keep km-, w- and q-formatter instances.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 5102
diff changeset
369 return kmFormat;
2284
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parents: 2176
diff changeset
370 }
5d1ba04d2f68 Refactored Formatter access to ease reuse.
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diff changeset
371
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parents: 2176
diff changeset
372
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Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 2176
diff changeset
373 /**
5d1ba04d2f68 Refactored Formatter access to ease reuse.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 2176
diff changeset
374 * Returns the number formatter for W values.
5d1ba04d2f68 Refactored Formatter access to ease reuse.
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diff changeset
375 *
5d1ba04d2f68 Refactored Formatter access to ease reuse.
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parents: 2176
diff changeset
376 * @return the number formatter for W values.
5d1ba04d2f68 Refactored Formatter access to ease reuse.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 2176
diff changeset
377 */
5d1ba04d2f68 Refactored Formatter access to ease reuse.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 2176
diff changeset
378 protected NumberFormat getWFormatter() {
5111
4898376c680b AbstractExporter: keep km-, w- and q-formatter instances.
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parents: 5102
diff changeset
379 if (wFormat == null) {
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parents: 5102
diff changeset
380 wFormat = Formatter.getWaterlevelW(context);
4898376c680b AbstractExporter: keep km-, w- and q-formatter instances.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
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diff changeset
381 }
4898376c680b AbstractExporter: keep km-, w- and q-formatter instances.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 5102
diff changeset
382 return wFormat;
2284
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parents: 2176
diff changeset
383 }
5d1ba04d2f68 Refactored Formatter access to ease reuse.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 2176
diff changeset
384
5d1ba04d2f68 Refactored Formatter access to ease reuse.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 2176
diff changeset
385
5d1ba04d2f68 Refactored Formatter access to ease reuse.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 2176
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386 /**
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Felix Wolfsteller <felix.wolfsteller@intevation.de>
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387 * Returns the number formatter for Q values.
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388 *
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Felix Wolfsteller <felix.wolfsteller@intevation.de>
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389 * @return the number formatter for Q values.
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Felix Wolfsteller <felix.wolfsteller@intevation.de>
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390 */
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391 protected NumberFormat getQFormatter() {
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Felix Wolfsteller <felix.wolfsteller@intevation.de>
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392 if (qFormat == null) {
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393 qFormat = Formatter.getWaterlevelQ(context);
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Felix Wolfsteller <felix.wolfsteller@intevation.de>
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394 }
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395 return qFormat;
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Felix Wolfsteller <felix.wolfsteller@intevation.de>
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396 }
391
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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397 }
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
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398 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org