Mercurial > dive4elements > river
comparison flys-client/src/main/java/de/intevation/flys/client/server/DataFactory.java @ 1571:1227878665b5
Introduced a DataFactory that should be used to create new Data instances.
flys-client/trunk@3836 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
|---|---|
| date | Tue, 31 Jan 2012 10:34:54 +0000 |
| parents | |
| children | 0f2b94408bd1 |
comparison
equal
deleted
inserted
replaced
| 1570:eeee85c4d996 | 1571:1227878665b5 |
|---|---|
| 1 package de.intevation.flys.client.server; | |
| 2 | |
| 3 import javax.xml.xpath.XPathConstants; | |
| 4 | |
| 5 import org.w3c.dom.Element; | |
| 6 import org.w3c.dom.NodeList; | |
| 7 | |
| 8 import org.apache.log4j.Logger; | |
| 9 | |
| 10 import de.intevation.artifacts.common.ArtifactNamespaceContext; | |
| 11 import de.intevation.artifacts.common.utils.XMLUtils; | |
| 12 | |
| 13 import de.intevation.flys.client.shared.model.Data; | |
| 14 import de.intevation.flys.client.shared.model.DataItem; | |
| 15 import de.intevation.flys.client.shared.model.DefaultData; | |
| 16 import de.intevation.flys.client.shared.model.DefaultDataItem; | |
| 17 | |
| 18 | |
| 19 /** | |
| 20 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> | |
| 21 */ | |
| 22 public class DataFactory { | |
| 23 | |
| 24 private static final Logger logger = Logger.getLogger(DataFactory.class); | |
| 25 | |
| 26 | |
| 27 public static final String NS_URI = ArtifactNamespaceContext.NAMESPACE_URI; | |
| 28 | |
| 29 | |
| 30 /** | |
| 31 * Creates a new Data instance based on the <i>art:type</i> attribute of | |
| 32 * <i>element</i>. | |
| 33 * | |
| 34 * @param element The Data element. | |
| 35 * | |
| 36 * @return a Data instance. | |
| 37 */ | |
| 38 public static Data createDataFromElement(Element element) { | |
| 39 String name = element.getAttributeNS(NS_URI, "name"); | |
| 40 String type = element.getAttributeNS(NS_URI, "type"); | |
| 41 | |
| 42 logger.debug("Create new Data instance for: " + name + " | " + type); | |
| 43 | |
| 44 if (type == null || type.length() == 0) { | |
| 45 return createDefaultData(element, name); | |
| 46 } | |
| 47 else { | |
| 48 return createDefaultData(element, name); | |
| 49 } | |
| 50 } | |
| 51 | |
| 52 | |
| 53 /** | |
| 54 * This method creates a new instance of DefaultData which has no real type | |
| 55 * set. | |
| 56 * | |
| 57 * @param ele The Data element. | |
| 58 * @param name The name of the Data instance. | |
| 59 * | |
| 60 * @return an instance of DefaultData. | |
| 61 */ | |
| 62 protected static Data createDefaultData(Element ele, String name) { | |
| 63 logger.debug("Create new DefaultData"); | |
| 64 return new DefaultData(name, name, "default", extractDataItems(ele)); | |
| 65 } | |
| 66 | |
| 67 | |
| 68 /** | |
| 69 * This method extracts the art:item elements placed under <i>elements</i>. | |
| 70 * | |
| 71 * @param element A data node that contains items. | |
| 72 * | |
| 73 * @return a list of DataItems. | |
| 74 */ | |
| 75 protected static DataItem[] extractDataItems(Element element) { | |
| 76 NodeList itemList = (NodeList) XMLUtils.xpath( | |
| 77 element, | |
| 78 "art:item", | |
| 79 XPathConstants.NODESET, | |
| 80 ArtifactNamespaceContext.INSTANCE); | |
| 81 | |
| 82 if (itemList == null || itemList.getLength() == 0) { | |
| 83 logger.debug("No old data items found."); | |
| 84 return null; | |
| 85 } | |
| 86 | |
| 87 int count = itemList.getLength(); | |
| 88 | |
| 89 DataItem[] items = new DataItem[count]; | |
| 90 | |
| 91 for (int i = 0; i < count; i++) { | |
| 92 Element tmp = (Element) itemList.item(i); | |
| 93 | |
| 94 String value = tmp.getAttributeNS(NS_URI, "value"); | |
| 95 String label = tmp.getAttributeNS(NS_URI, "label"); | |
| 96 | |
| 97 items[i] = new DefaultDataItem(label, label, value); | |
| 98 } | |
| 99 | |
| 100 return items; | |
| 101 } | |
| 102 } | |
| 103 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |