Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/artifacts/GNVProductArtifactFactory.java @ 1115:f953c9a559d8

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Added license file and license headers. gnv-artifacts/trunk@1260 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 02 Nov 2010 17:46:55 +0000
parents 41234fcf4c7e
children dec4257ad570
rev   line source
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f953c9a559d8 Added license file and license headers.
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1 /*
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2 * Copyright (c) 2010 by Intevation GmbH
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3 *
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4 * This program is free software under the LGPL (>=v2.1)
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5 * Read the file LGPL.txt coming with the software for details
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6 * or visit http://www.gnu.org/licenses/ if it does not exist.
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7 */
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8
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9 package de.intevation.gnv.artifacts;
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10
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11 import java.util.ArrayList;
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12 import java.util.Collection;
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13 import java.util.HashMap;
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14 import java.util.Map;
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15
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16 import javax.xml.xpath.XPathConstants;
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17
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18 import org.apache.log4j.Logger;
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19 import org.w3c.dom.Document;
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20 import org.w3c.dom.Node;
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21 import org.w3c.dom.NodeList;
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22
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23 import de.intevation.artifactdatabase.DefaultArtifactFactory;
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24 import de.intevation.artifactdatabase.ProxyArtifact;
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25 import de.intevation.artifactdatabase.XMLUtils;
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26 import de.intevation.artifacts.Artifact;
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27 import de.intevation.artifacts.ArtifactFactory;
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28 import de.intevation.gnv.artifacts.fis.SelectProductArtifact;
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29 import de.intevation.gnv.artifacts.fis.product.DefaultProduct;
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30 import de.intevation.gnv.state.DefaultInputData;
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31
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32 /**
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33 * This factory is called to create a {@link
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34 * de.intevation.gnv.artifacts.fis.SelectProductArtifact} which lets the user
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35 * select a product supported by the selected fis.
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36 *
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37 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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38 */
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39 public class GNVProductArtifactFactory extends DefaultArtifactFactory {
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40
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41 public static final String XPATH_REPLACE_NAME = "IDENTIFIER";
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42
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43 public static final String XPATH_PRODUCT_ARTIFACT =
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44 "artifact-database/artifacts/artifact[@name='"+XPATH_REPLACE_NAME+"']";
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45
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46 public static final String XPATH_PRODUCT = "products/product";
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47
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48 public static final String XPATH_PRODUCT_NAME = "@name";
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49
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50 public static final String XPATH_PRODUCT_FACTORY = "artifact-factory";
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51
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52 public static final String XPATH_PRODUCT_PARAMETER = "parameters/parameter";
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53
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54 private Logger logger = Logger.getLogger(GNVProductArtifactFactory.class);
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55
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56 private Map productFactories;
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57 private Map products;
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58
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59
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60 /**
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61 * Constructor.
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62 */
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63 public GNVProductArtifactFactory() {
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64 }
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65
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66 /**
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67 * Method to create an artifact. If the created artifact is from type
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68 * <code>ProxyArtifact</code>, a further ProductSelectArtifact is created
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69 * which becomes embedded into the <code>ProxyArtifact</code>.
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70 * @param identifier UUID.
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71 * @param context CallContext.
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72 * @param data Some data.
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73 * @return The created artifact.
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74 */
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75 @Override
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76 public Artifact createArtifact(String identifier, Object context, Document data) {
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77
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78 // create a SelectProductArtifact for initial product selection
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79 Artifact artifact = super.createArtifact(identifier, context, data);
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80
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81 if (artifact instanceof ProxyArtifact) {
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82
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83 SelectProductArtifact select = new SelectProductArtifact();
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84 select.setProducts(products);
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85 select.setup(identifier, this, context, data);
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86
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87 ((ProxyArtifact) artifact).setProxied(select);
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88 }
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89
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90 return artifact;
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91 }
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92
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93
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94 @Override
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95 public void setup(Document document, Node factoryNode) {
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96 super.setup(document, factoryNode);
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97
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98 String xpath = XPATH_PRODUCT_ARTIFACT.replace(XPATH_REPLACE_NAME, name);
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99 Node artifact = (Node) XMLUtils.xpath(
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100 document, xpath, XPathConstants.NODE);
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101
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102 NodeList productNodes = (NodeList) XMLUtils.xpath(
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103 artifact, XPATH_PRODUCT, XPathConstants.NODESET);
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104
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105 if (productNodes == null) {
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106 logger.warn("No products found for fis: " + name);
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107 return;
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108 }
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109
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110 int productLength = productNodes.getLength();
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111
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112 if (productLength != 0) {
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113 productFactories = new HashMap(productLength);
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114 products = new HashMap(productLength);
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115
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116 parseProductFactories(document, productNodes);
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117 }
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118 }
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119
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120
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121 public ArtifactFactory getArtifactFactoryByName(String name) {
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122 return (ArtifactFactory) productFactories.get(name);
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123 }
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124
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125
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126 protected void parseProductFactories(Document document, NodeList products) {
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127 int items = products.getLength();
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128
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129 for(int i = 0; i < items; i++) {
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130
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131 try {
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132 Node product = products.item(i);
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133
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134 String name = (String) XMLUtils.xpath(
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135 product, XPATH_PRODUCT_NAME, XPathConstants.STRING);
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136
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137 Node factoryNode = (Node) XMLUtils.xpath(
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138 product, XPATH_PRODUCT_FACTORY, XPathConstants.NODE);
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139
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140 String factoryClass = factoryNode.getTextContent().trim();
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141
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142 if (factoryClass == null || factoryClass.equals("")) {
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143 logger.warn("No artifact factory class found for " + name);
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144 continue;
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145 }
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146
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147 Class cls = Class.forName(factoryClass);
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148 ArtifactFactory factory = (ArtifactFactory) cls.newInstance();
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149 factory.setup(document, factoryNode);
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150
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151 productFactories.put(name, factory);
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152 initializeProducts(product);
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153 }
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154 catch (ClassNotFoundException cnfe) {
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155 logger.warn(cnfe, cnfe);
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156 }
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157 catch (InstantiationException ie) {
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158 logger.warn(ie, ie);
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159 }
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160 catch (IllegalAccessException iae) {
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161 logger.warn(iae, iae);
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162 }
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163 }
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164 }
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165
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166
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167 /**
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168 * Initialize all products supported by the current fis.
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169 */
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170 protected void initializeProducts(Node productNode) {
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171 String productName = (String) XMLUtils.xpath(
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172 productNode, "@name", XPathConstants.STRING);
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173
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174 NodeList parameterNodes = (NodeList) XMLUtils.xpath(
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175 productNode, XPATH_PRODUCT_PARAMETER, XPathConstants.NODESET
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176 );
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177
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178 if (parameterNodes != null) {
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179 int items = parameterNodes.getLength();
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180 Collection inputParameter = new ArrayList(items);
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181
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182 for (int j = 0; j < items; j++) {
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183 Node parameterNode = (Node) parameterNodes.item(j);
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184 String name = (String) XMLUtils.xpath(
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185 parameterNode, "@name", XPathConstants.STRING);
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186 String value = (String) XMLUtils.xpath(
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187 parameterNode, "@value", XPathConstants.STRING);
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188
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189 inputParameter.add(new DefaultInputData(name, value));
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190 }
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191
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192 products.put(
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193 productName,
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194 new DefaultProduct(productName, inputParameter, this.name)
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195 );
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196 }
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197 }
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198 }
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199 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org