Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/artifacts/GNVProductArtifactFactory.java @ 789:0dc115cbef0d

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Added javadoc for artifact package. gnv-artifacts/trunk@871 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Wed, 31 Mar 2010 09:09:05 +0000
parents c4156275c1e1
children 22c18083225e
rev   line source
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1 package de.intevation.gnv.artifacts;
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2
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3 import de.intevation.artifactdatabase.DefaultArtifactFactory;
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4 import de.intevation.artifactdatabase.ProxyArtifact;
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5 import de.intevation.artifactdatabase.XMLUtils;
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6
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7 import de.intevation.artifacts.Artifact;
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8 import de.intevation.artifacts.ArtifactFactory;
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9
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10 import de.intevation.gnv.artifacts.fis.SelectProductArtifact;
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11
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12 import de.intevation.gnv.artifacts.fis.product.DefaultProduct;
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13
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14 import de.intevation.gnv.state.DefaultInputData;
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16 import java.util.ArrayList;
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17 import java.util.Collection;
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18 import java.util.HashMap;
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19 import java.util.Map;
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20
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21 import javax.xml.xpath.XPathConstants;
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22
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23 import org.apache.log4j.Logger;
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25 import org.w3c.dom.Document;
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26 import org.w3c.dom.Node;
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27 import org.w3c.dom.NodeList;
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28
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29 /**
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30 * This factory is called to create a {@link
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31 * de.intevation.gnv.artifacts.fis.SelectProductArtifact} which lets the user
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32 * select a product supported by the selected fis.
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33 *
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34 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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35 */
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36 public class GNVProductArtifactFactory extends DefaultArtifactFactory {
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37
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38 /**
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39 *
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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 /**
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44 *
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45 */
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46 public static final String XPATH_PRODUCT_ARTIFACT =
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47 "artifact-database/artifacts/artifact[@name='"+XPATH_REPLACE_NAME+"']";
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48
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49 /**
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50 *
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51 */
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52 public static final String XPATH_PRODUCT = "products/product";
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53
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54 /**
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55 *
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56 */
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57 public static final String XPATH_PRODUCT_NAME = "@name";
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58
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59 /**
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60 *
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61 */
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62 public static final String XPATH_PRODUCT_FACTORY = "artifact-factory";
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63
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64 /**
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65 *
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66 */
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67 public static final String XPATH_PRODUCT_PARAMETER = "parameters/parameter";
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68
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69 private Logger logger = Logger.getLogger(GNVProductArtifactFactory.class);
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70
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71 private Map productFactories;
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72 private Map products;
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73
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74
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75 /**
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76 * Constructor.
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77 */
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78 public GNVProductArtifactFactory() {
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79 }
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80
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81 /**
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82 * Method to create an artifact. If the created artifact is from type
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83 * <code>ProxyArtifact</code>, a further ProductSelectArtifact is created
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84 * which becomes embedded into the <code>ProxyArtifact</code>.
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85 * @param identifier UUID.
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86 * @param context CallContext.
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87 * @param data Some data.
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88 * @return The created artifact.
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89 */
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90 @Override
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91 public Artifact createArtifact(String identifier, Object context, Document data) {
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92
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93 // create a SelectProductArtifact for initial product selection
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94 Artifact artifact = super.createArtifact(identifier, context, data);
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95
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96 if (artifact instanceof ProxyArtifact) {
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97
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98 SelectProductArtifact select = new SelectProductArtifact();
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99 select.setProducts(products);
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100 select.setup(identifier, this, context, data);
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101
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102 ((ProxyArtifact) artifact).setProxied(select);
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103 }
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104
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105 return artifact;
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106 }
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107
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108 /**
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109 *
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110 * @param document
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111 * @param factoryNode
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112 */
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113 @Override
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114 public void setup(Document document, Node factoryNode) {
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115 super.setup(document, factoryNode);
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116
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117 String xpath = XPATH_PRODUCT_ARTIFACT.replace(XPATH_REPLACE_NAME, name);
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118 Node artifact = (Node) XMLUtils.xpath(
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119 document, xpath, XPathConstants.NODE);
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120
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121 NodeList productNodes = (NodeList) XMLUtils.xpath(
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122 artifact, XPATH_PRODUCT, XPathConstants.NODESET);
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123
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124 if (productNodes == null) {
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125 logger.warn("No products found for fis: " + name);
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126 return;
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127 }
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128
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129 int productLength = productNodes.getLength();
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130
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131 if (productLength != 0) {
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132 productFactories = new HashMap(productLength);
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133 products = new HashMap(productLength);
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134
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135 parseProductFactories(document, productNodes);
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136 }
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137 }
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138
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139
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140 /**
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141 *
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142 * @param name
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143 * @return
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144 */
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145 public ArtifactFactory getArtifactFactoryByName(String name) {
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146 return (ArtifactFactory) productFactories.get(name);
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147 }
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148
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149
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150 /**
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151 *
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152 * @param document
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153 * @param products
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154 */
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155 protected void parseProductFactories(Document document, NodeList products) {
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156 int items = products.getLength();
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157
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158 for(int i = 0; i < items; i++) {
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159
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160 try {
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161 Node product = products.item(i);
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162
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163 String name = (String) XMLUtils.xpath(
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164 product, XPATH_PRODUCT_NAME, XPathConstants.STRING);
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165
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166 Node factoryNode = (Node) XMLUtils.xpath(
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167 product, XPATH_PRODUCT_FACTORY, XPathConstants.NODE);
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168
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169 String factoryClass = factoryNode.getTextContent();
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170
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171 if (factoryClass == null || factoryClass.equals("")) {
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172 logger.warn("No artifact factory class found for " + name);
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173 continue;
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174 }
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175
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176 Class cls = Class.forName(factoryClass);
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177 ArtifactFactory factory = (ArtifactFactory) cls.newInstance();
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178 factory.setup(document, factoryNode);
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179
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180 productFactories.put(name, factory);
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181 initializeProducts(product);
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182 }
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183 catch (ClassNotFoundException cnfe) {
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184 logger.warn(cnfe, cnfe);
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185 }
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186 catch (InstantiationException ie) {
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187 logger.warn(ie, ie);
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188 }
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189 catch (IllegalAccessException iae) {
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190 logger.warn(iae, iae);
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191 }
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192 }
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193 }
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194
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195
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196 /**
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197 * Initialize all products supported by the current fis.
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198 * @param productNode
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199 */
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200 protected void initializeProducts(Node productNode) {
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201 String productName = (String) XMLUtils.xpath(
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202 productNode, "@name", XPathConstants.STRING);
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203
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204 NodeList parameterNodes = (NodeList) XMLUtils.xpath(
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205 productNode, XPATH_PRODUCT_PARAMETER, XPathConstants.NODESET
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206 );
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207
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208 if (parameterNodes != null) {
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209 int items = parameterNodes.getLength();
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210 Collection inputParameter = new ArrayList(items);
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211
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212 for (int j = 0; j < items; j++) {
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213 Node parameterNode = (Node) parameterNodes.item(j);
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214 String name = (String) XMLUtils.xpath(
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215 parameterNode, "@name", XPathConstants.STRING);
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216 String value = (String) XMLUtils.xpath(
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217 parameterNode, "@value", XPathConstants.STRING);
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218
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219 inputParameter.add(new DefaultInputData(name, value));
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220 }
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221
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222 products.put(
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223 productName,
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224 new DefaultProduct(productName, inputParameter, this.name)
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225 );
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226 }
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227 }
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228 }
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229 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org