Mercurial > dive4elements > river

annotate gwt-client/src/main/java/org/dive4elements/river/client/server/DataFactory.java @ 9074:766890addcb2

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state To client communication;
author gernotbelger
date Fri, 18 May 2018 17:26:26 +0200
parents 5e38e2924c07
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.client.server;
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10
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11 import java.util.Collections;
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12 import java.util.HashMap;
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13 import java.util.Map;
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14
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15 import javax.xml.xpath.XPathConstants;
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16
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17 import org.apache.log4j.Logger;
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18 import org.dive4elements.artifacts.common.ArtifactNamespaceContext;
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19 import org.dive4elements.artifacts.common.utils.XMLUtils;
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20 import org.dive4elements.river.client.shared.model.Data;
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21 import org.dive4elements.river.client.shared.model.DataItem;
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22 import org.dive4elements.river.client.shared.model.DefaultData;
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23 import org.dive4elements.river.client.shared.model.DefaultDataItem;
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24 import org.dive4elements.river.client.shared.model.DoubleArrayData;
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25 import org.dive4elements.river.client.shared.model.IntDataItem;
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26 import org.dive4elements.river.client.shared.model.IntegerArrayData;
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27 import org.dive4elements.river.client.shared.model.IntegerData;
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28 import org.dive4elements.river.client.shared.model.IntegerOptionsData;
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29 import org.dive4elements.river.client.shared.model.IntegerRangeData;
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30 import org.dive4elements.river.client.shared.model.LongRangeData;
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31 import org.dive4elements.river.client.shared.model.MultiAttributeData;
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32 import org.dive4elements.river.client.shared.model.MultiDataItem;
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33 import org.dive4elements.river.client.shared.model.StringData;
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34 import org.dive4elements.river.client.shared.model.StringOptionsData;
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35 import org.w3c.dom.Attr;
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36 import org.w3c.dom.Element;
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37 import org.w3c.dom.NamedNodeMap;
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38 import org.w3c.dom.Node;
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39 import org.w3c.dom.NodeList;
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40
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41 /**
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42 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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43 */
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44 public class DataFactory {
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45
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46 private static final Logger log = Logger.getLogger(DataFactory.class);
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47
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48 public static final String NS_URI = ArtifactNamespaceContext.NAMESPACE_URI;
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49
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50 /**
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51 * Creates a new Data instance based on the <i>art:type</i> attribute of
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52 * <i>element</i>.
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53 *
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54 * @param element
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55 * The Data element.
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56 *
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57 * @return a Data instance.
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58 */
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59 public static Data createDataFromElement(final Element element) {
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60 final String name = element.getAttributeNS(NS_URI, "name");
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61 String type = element.getAttributeNS(NS_URI, "type");
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62 String label = element.getAttributeNS(NS_URI, "label");
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63
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64 label = label != null && label.length() > 0 ? label : name;
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65
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66 try {
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67 log.debug("Create Data instance for: " + name + " | " + type);
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68
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69 if (type == null || type.length() == 0) {
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70 return createDefaultData(element, name, label);
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71 }
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72
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73 type = type.toLowerCase();
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74
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75 if (type.equals(StringData.TYPE)) {
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76 return createStringData(element, name, label);
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77 } else if (type.equals(IntegerData.TYPE)) {
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78 return createIntegerData(element, name, label);
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79 } else if (type.equals(StringOptionsData.TYPE)) {
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80 return createStringOptionsData(element, name, label);
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81 } else if (type.equals(IntegerOptionsData.TYPE)) {
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82 return createIntegerOptionsData(element, name, label);
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83 } else if (type.equals(IntegerRangeData.TYPE)) {
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84 return createIntegerRangeData(element, name, label);
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85 } else if (type.equals(IntegerArrayData.TYPE)) {
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86 return createIntegerArrayData(element, name, label);
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87 } else if (type.equals(DoubleArrayData.TYPE)) {
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88 return createDoubleArrayData(element, name, label);
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89 } else if (type.equals(LongRangeData.TYPE)) {
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90 return createLongRangeData(element, name, label);
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91 } else if (type.equals(MultiAttributeData.TYPE)) {
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92 return createMultiAttributeData(element, name, label);
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93 } else {
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94 return createDefaultData(element, name, label);
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95 }
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96 }
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97 catch (final Exception e) {
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98 log.error("Error while data creation for: " + name);
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99 }
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100
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101 return null;
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102 }
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103
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104 public static Data createMultiAttributeData(final Element element, final String name, final String label) {
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105 return new MultiAttributeData(name, label, extractMultiDataItems(element), extractMeta(element));
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106 }
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107
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108 private static Map<String, Map<String, String>> extractMeta(final Element element) {
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109 final NodeList nl = element.getElementsByTagName("art:meta");
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110 final int N = nl.getLength();
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111 if (N != 1) {
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112 log.debug("No or too much meta data found for multi attribute data");
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113 return Collections.<String, Map<String, String>>emptyMap();
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114 }
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115 final Map<String, Map<String, String>> map = new HashMap<String, Map<String, String>>();
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116
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117 final Element metaElement = (Element) nl.item(0);
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118 final NodeList metaChildren = metaElement.getChildNodes();
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119
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120 for (int i = 0; i < metaChildren.getLength(); ++i) {
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121
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122 final Node childNode = metaChildren.item(i);
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123 if (childNode instanceof Element) {
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124
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125 final Element e = (Element) childNode;
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126 final NamedNodeMap attrs = e.getAttributes();
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127 final Map<String, String> kvs = new HashMap<String, String>();
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128 for (int j = 0, A = attrs.getLength(); j < A; ++j) {
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129 final Attr attr = (Attr) attrs.item(j);
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130 kvs.put(attr.getName(), attr.getValue());
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131 }
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132 map.put(e.getLocalName(), kvs);
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133 }
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134 }
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135
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136 return map;
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137 }
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138
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139 protected static DataItem[] extractMultiDataItems(final Element element) {
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140 final NodeList itemList = (NodeList) XMLUtils.xpath(element, "art:item", XPathConstants.NODESET, ArtifactNamespaceContext.INSTANCE);
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141
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142 if (itemList == null || itemList.getLength() == 0) {
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143 log.debug("No old data items found.");
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144 return null;
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145 }
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146
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147 final int count = itemList.getLength();
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148
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149 final MultiDataItem[] items = new MultiDataItem[count];
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150
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151 for (int i = 0; i < count; i++) {
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152 final Element tmp = (Element) itemList.item(i);
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153
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154 final HashMap<String, String> data = new HashMap<String, String>();
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155 final String label = tmp.getAttributeNS(NS_URI, "label");
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156 final NamedNodeMap attributes = tmp.getAttributes();
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157 for (int j = 0, L = attributes.getLength(); j < L; j++) {
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158 final Node n = attributes.item(j);
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159 if (n.getNodeName().equals("label")) {
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160 continue;
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161 }
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162 data.put(n.getNodeName(), n.getNodeValue());
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163 }
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164 items[i] = new MultiDataItem(label, label, data);
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165 }
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166 return items;
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167 }
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168
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169 /**
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170 * This method creates a new instance of DefaultData which has no real type
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171 * set.
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172 *
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173 * @param ele
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174 * The Data element.
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175 * @param name
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176 * The name of the Data instance.
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177 *
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178 * @return an instance of DefaultData.
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179 */
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180 protected static Data createDefaultData(final Element ele, final String name, final String label) {
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181 log.debug("Create new DefaultData");
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182 return new DefaultData(name, label, "default", extractDataItems(ele));
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183 }
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184
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185 /**
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186 * This method creates a new instance of StringData which has a type
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187 * "string" set.
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188 *
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189 * @param ele
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190 * The Data element.
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191 * @param name
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192 * The name of the Data instance.
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193 *
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194 * @return an instance of StringData.
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195 */
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196 protected static Data createStringData(final Element ele, final String name, final String label) {
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197 return new StringData(name, label, extractDataItems(ele));
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198 }
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199
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200 /**
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201 * This method creates a new instance of DefaultData which has a type
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202 * "integer" set.
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203 *
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204 * @param ele
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205 * The Data element.
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206 * @param name
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207 * The name of the Data instance.
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208 *
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209 * @return an instance of IntegerData.
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210 */
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211 protected static Data createIntegerData(final Element ele, final String name, final String label) {
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212 return new IntegerData(name, label, extractDataItems(ele));
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213 }
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214
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215 /**
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216 * This method creates a new instance of StringOptionsData which has a type
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217 * "options" set.
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218 *
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219 * @param ele
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220 * The Data element.
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221 * @param name
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222 * The name of the Data instance.
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223 *
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224 * @return an instance of StringOptionsData.
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225 */
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226 protected static Data createStringOptionsData(final Element ele, final String name, final String label) {
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227 return new StringOptionsData(name, label, extractDataItems(ele));
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228 }
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229
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230 /**
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231 * This method creates a new instance of DefaultData which has a type
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232 * "intoptions" set.
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233 *
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234 * @param ele
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235 * The Data element.
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236 * @param name
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237 * The name of the Data instance.
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238 *
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239 * @return an instance of IntegerOptionsData.
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240 */
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241 protected static Data createIntegerOptionsData(final Element ele, final String name, final String label) {
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242 return new IntegerOptionsData(name, label, extractDataItems(ele));
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243 }
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244
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245 /**
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246 * This method creates a new instance of DefaultData which has a type
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247 * "intrange" set.
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248 *
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249 * @param ele
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250 * The Data element.
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251 * @param name
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252 * The name of the Data instance.
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253 *
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254 * @return an instance of IntegerRangeData.
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255 */
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256 protected static Data createIntegerRangeData(final Element ele, final String name, final String label) {
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257 final DataItem[] items = extractDataItems(ele);
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258 final String rawValue = items[0].getStringValue();
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259
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260 final String[] minmax = rawValue.split(";");
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261
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262 return new IntegerRangeData(name, label, Integer.valueOf(minmax[0]), Integer.valueOf(minmax[1]));
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263 }
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264
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265 /**
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266 * This method creates a new instance of DefaultData which has a type
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267 * "integerarray" set.
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268 *
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269 * @param ele
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270 * The Data element.
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271 * @param name
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272 * The name of the Data instance.
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273 *
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274 * @return an instance of IntegerArrayData.
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275 */
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276 protected static Data createIntegerArrayData(final Element ele, final String name, final String label) {
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277 final IntDataItem[] items = extractIntDataItems(ele);
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278 return new IntegerArrayData(name, label, items);
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279 }
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280
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281 /**
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282 * This method creates a new instance of DefaultData which has a type
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283 * "doublearray" set.
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284 *
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285 * @param ele
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286 * The Data element.
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287 * @param name
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288 * The name of the Data instance.
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289 *
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290 * @return an instance of DoubleArrayData.
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291 */
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292 protected static Data createDoubleArrayData(final Element ele, final String name, final String label) {
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293 final DataItem[] items = extractDataItems(ele);
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294 final String rawValue = items[0].getStringValue();
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295
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296 final String[] values = rawValue.split(";");
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297 final double[] doubles = new double[values.length];
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298
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299 for (int i = 0; i < values.length; i++) {
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300 try {
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301 doubles[i] = Double.valueOf(values[i]);
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302 }
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303 catch (final NumberFormatException nfe) {
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304 log.warn("Error while parsing DoubleArrayData: " + nfe);
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305 }
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306 }
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307
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308 return new DoubleArrayData(name, label, doubles);
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309 }
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310
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311 /**
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312 * This method extracts the art:item elements placed under <i>elements</i>.
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313 *
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314 * @param element
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315 * A data node that contains items.
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316 *
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317 * @return a list of DataItems.
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318 */
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319 protected static DataItem[] extractDataItems(final Element element) {
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320 final NodeList itemList = (NodeList) XMLUtils.xpath(element, "art:item", XPathConstants.NODESET, ArtifactNamespaceContext.INSTANCE);
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321
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322 if (itemList == null || itemList.getLength() == 0) {
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323 log.debug("No data items found.");
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324 return null;
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325 }
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326
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327 final int count = itemList.getLength();
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328
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329 final DataItem[] items = new DataItem[count];
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330
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331 log.debug("There are " + count + " data items in element.");
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332
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333 for (int i = 0; i < count; i++) {
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334 final Element tmp = (Element) itemList.item(i);
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335
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336 final String value = tmp.getAttributeNS(NS_URI, "value");
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337 final String label = tmp.getAttributeNS(NS_URI, "label");
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338
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339 log.debug("Found data item:");
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340 log.debug(" label: " + label);
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341 log.debug(" value: " + value);
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342
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343 items[i] = new DefaultDataItem(label, label, value);
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344 }
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345
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346 return items;
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347 }
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348
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349 /**
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350 * This method extracts the art:item elements placed under <i>elements</i>.
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351 *
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352 * @param element
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353 * A data node that contains items.
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354 *
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355 * @return a list of DataItems.
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356 */
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357 protected static IntDataItem[] extractIntDataItems(final Element element) {
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358 final NodeList itemList = (NodeList) XMLUtils.xpath(element, "art:item", XPathConstants.NODESET, ArtifactNamespaceContext.INSTANCE);
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359
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360 if (itemList == null || itemList.getLength() == 0) {
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361 log.debug("No old data items found.");
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362 return null;
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363 }
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364
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365 final int count = itemList.getLength();
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366
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367 final IntDataItem[] items = new IntDataItem[count];
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368
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369 for (int i = 0; i < count; i++) {
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370 final Element tmp = (Element) itemList.item(i);
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371
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372 final String value = tmp.getAttributeNS(NS_URI, "value");
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373 final String label = tmp.getAttributeNS(NS_URI, "label");
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374
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375 try {
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376 final int data = Integer.parseInt(value);
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377 items[i] = new IntDataItem(label, label, data);
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378 }
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379 catch (final NumberFormatException nfe) {
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380 log.debug(nfe, nfe);
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381 }
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382 }
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383 return items;
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384 }
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385
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386 /**
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387 * This method creates a new instance of LongRangeData which has a type
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388 * "longrange" set.
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389 *
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390 * @param ele
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391 * The Data element.
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392 * @param name
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393 * The name of the Data instance.
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394 *
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395 * @return an instance of IntegerRangeData.
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396 */
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397 protected static Data createLongRangeData(final Element ele, final String name, final String label) {
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398 final DataItem[] items = extractDataItems(ele);
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399 final String rawValue = items[0].getStringValue();
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400
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401 final String[] minmax = rawValue.split(";");
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402
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403 return new LongRangeData(name, label, Long.valueOf(minmax[0]), Long.valueOf(minmax[1]));
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404 }
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405
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406 }
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407 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org