Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/artifacts/GNVProductArtifactFactory.java @ 1028:41234fcf4c7e

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Some Bugfixes which prevent Exceptions executing the Examples in the config-manual gnv-artifacts/trunk@1052 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Tim Englich <tim.englich@intevation.de>
date Tue, 04 May 2010 12:40:21 +0000
parents 05bf8534a35a
children f953c9a559d8
rev   line source
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1 package de.intevation.gnv.artifacts;
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2
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3 import java.util.ArrayList;
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4 import java.util.Collection;
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5 import java.util.HashMap;
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6 import java.util.Map;
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7
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8 import javax.xml.xpath.XPathConstants;
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9
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10 import org.apache.log4j.Logger;
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11 import org.w3c.dom.Document;
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12 import org.w3c.dom.Node;
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13 import org.w3c.dom.NodeList;
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14
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15 import de.intevation.artifactdatabase.DefaultArtifactFactory;
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16 import de.intevation.artifactdatabase.ProxyArtifact;
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17 import de.intevation.artifactdatabase.XMLUtils;
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18 import de.intevation.artifacts.Artifact;
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19 import de.intevation.artifacts.ArtifactFactory;
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20 import de.intevation.gnv.artifacts.fis.SelectProductArtifact;
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21 import de.intevation.gnv.artifacts.fis.product.DefaultProduct;
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22 import de.intevation.gnv.state.DefaultInputData;
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23
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24 /**
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25 * This factory is called to create a {@link
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26 * de.intevation.gnv.artifacts.fis.SelectProductArtifact} which lets the user
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27 * select a product supported by the selected fis.
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28 *
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29 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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30 */
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31 public class GNVProductArtifactFactory extends DefaultArtifactFactory {
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32
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33 public static final String XPATH_REPLACE_NAME = "IDENTIFIER";
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34
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35 public static final String XPATH_PRODUCT_ARTIFACT =
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36 "artifact-database/artifacts/artifact[@name='"+XPATH_REPLACE_NAME+"']";
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37
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38 public static final String XPATH_PRODUCT = "products/product";
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39
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40 public static final String XPATH_PRODUCT_NAME = "@name";
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41
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42 public static final String XPATH_PRODUCT_FACTORY = "artifact-factory";
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43
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44 public static final String XPATH_PRODUCT_PARAMETER = "parameters/parameter";
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45
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46 private Logger logger = Logger.getLogger(GNVProductArtifactFactory.class);
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47
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48 private Map productFactories;
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49 private Map products;
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50
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51
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52 /**
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53 * Constructor.
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54 */
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55 public GNVProductArtifactFactory() {
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56 }
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57
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58 /**
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59 * Method to create an artifact. If the created artifact is from type
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60 * <code>ProxyArtifact</code>, a further ProductSelectArtifact is created
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61 * which becomes embedded into the <code>ProxyArtifact</code>.
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62 * @param identifier UUID.
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63 * @param context CallContext.
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64 * @param data Some data.
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65 * @return The created artifact.
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66 */
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67 @Override
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68 public Artifact createArtifact(String identifier, Object context, Document data) {
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69
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70 // create a SelectProductArtifact for initial product selection
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71 Artifact artifact = super.createArtifact(identifier, context, data);
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72
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73 if (artifact instanceof ProxyArtifact) {
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74
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75 SelectProductArtifact select = new SelectProductArtifact();
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76 select.setProducts(products);
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77 select.setup(identifier, this, context, data);
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78
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79 ((ProxyArtifact) artifact).setProxied(select);
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80 }
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81
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82 return artifact;
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83 }
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84
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85
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86 @Override
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87 public void setup(Document document, Node factoryNode) {
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88 super.setup(document, factoryNode);
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89
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90 String xpath = XPATH_PRODUCT_ARTIFACT.replace(XPATH_REPLACE_NAME, name);
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91 Node artifact = (Node) XMLUtils.xpath(
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92 document, xpath, XPathConstants.NODE);
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93
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94 NodeList productNodes = (NodeList) XMLUtils.xpath(
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95 artifact, XPATH_PRODUCT, XPathConstants.NODESET);
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96
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97 if (productNodes == null) {
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98 logger.warn("No products found for fis: " + name);
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99 return;
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100 }
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101
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102 int productLength = productNodes.getLength();
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103
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104 if (productLength != 0) {
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105 productFactories = new HashMap(productLength);
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106 products = new HashMap(productLength);
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107
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108 parseProductFactories(document, productNodes);
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109 }
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110 }
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111
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112
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113 public ArtifactFactory getArtifactFactoryByName(String name) {
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114 return (ArtifactFactory) productFactories.get(name);
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115 }
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116
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117
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118 protected void parseProductFactories(Document document, NodeList products) {
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119 int items = products.getLength();
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120
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121 for(int i = 0; i < items; i++) {
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122
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123 try {
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124 Node product = products.item(i);
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125
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126 String name = (String) XMLUtils.xpath(
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127 product, XPATH_PRODUCT_NAME, XPathConstants.STRING);
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128
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129 Node factoryNode = (Node) XMLUtils.xpath(
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130 product, XPATH_PRODUCT_FACTORY, XPathConstants.NODE);
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131
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132 String factoryClass = factoryNode.getTextContent().trim();
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133
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134 if (factoryClass == null || factoryClass.equals("")) {
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135 logger.warn("No artifact factory class found for " + name);
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136 continue;
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137 }
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138
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139 Class cls = Class.forName(factoryClass);
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140 ArtifactFactory factory = (ArtifactFactory) cls.newInstance();
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141 factory.setup(document, factoryNode);
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142
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143 productFactories.put(name, factory);
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144 initializeProducts(product);
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145 }
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146 catch (ClassNotFoundException cnfe) {
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147 logger.warn(cnfe, cnfe);
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148 }
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149 catch (InstantiationException ie) {
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150 logger.warn(ie, ie);
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151 }
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152 catch (IllegalAccessException iae) {
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153 logger.warn(iae, iae);
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154 }
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155 }
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156 }
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157
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158
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159 /**
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160 * Initialize all products supported by the current fis.
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161 */
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162 protected void initializeProducts(Node productNode) {
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163 String productName = (String) XMLUtils.xpath(
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164 productNode, "@name", XPathConstants.STRING);
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165
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166 NodeList parameterNodes = (NodeList) XMLUtils.xpath(
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167 productNode, XPATH_PRODUCT_PARAMETER, XPathConstants.NODESET
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168 );
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169
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170 if (parameterNodes != null) {
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171 int items = parameterNodes.getLength();
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172 Collection inputParameter = new ArrayList(items);
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173
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174 for (int j = 0; j < items; j++) {
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175 Node parameterNode = (Node) parameterNodes.item(j);
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176 String name = (String) XMLUtils.xpath(
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177 parameterNode, "@name", XPathConstants.STRING);
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178 String value = (String) XMLUtils.xpath(
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179 parameterNode, "@value", XPathConstants.STRING);
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180
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181 inputParameter.add(new DefaultInputData(name, value));
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182 }
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183
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184 products.put(
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185 productName,
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186 new DefaultProduct(productName, inputParameter, this.name)
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187 );
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188 }
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189 }
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190 }
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191 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org