Mercurial > dive4elements > river
comparison flys-artifacts/src/main/java/org/dive4elements/river/artifacts/states/StateFactory.java @ 5831:bd047b71ab37
Repaired internal references
| author | Sascha L. Teichmann <teichmann@intevation.de> |
|---|---|
| date | Thu, 25 Apr 2013 12:06:39 +0200 |
| parents | flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/StateFactory.java@e74e707ff650 |
| children |
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| 5830:160f53ee0870 | 5831:bd047b71ab37 |
|---|---|
| 1 package org.dive4elements.river.artifacts.states; | |
| 2 | |
| 3 import javax.xml.xpath.XPathConstants; | |
| 4 | |
| 5 import org.apache.log4j.Logger; | |
| 6 | |
| 7 import org.w3c.dom.Node; | |
| 8 import org.w3c.dom.NodeList; | |
| 9 | |
| 10 import org.dive4elements.artifactdatabase.data.DefaultStateData; | |
| 11 import org.dive4elements.artifactdatabase.state.State; | |
| 12 | |
| 13 import org.dive4elements.artifacts.common.utils.XMLUtils; | |
| 14 | |
| 15 | |
| 16 /** | |
| 17 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> | |
| 18 */ | |
| 19 public class StateFactory { | |
| 20 | |
| 21 /** The logger used in this class */ | |
| 22 private static Logger logger = Logger.getLogger(StateFactory.class); | |
| 23 | |
| 24 /** The XPath to the classname of the state */ | |
| 25 public static final String XPATH_STATE = "@state"; | |
| 26 | |
| 27 /** The XPath to the data items of the state relative to the state node. */ | |
| 28 public static final String XPATH_DATA = "data"; | |
| 29 | |
| 30 /** The XPath to the data name relative to the data node.*/ | |
| 31 public static final String XPATH_DATA_NAME = "@name"; | |
| 32 | |
| 33 /** The XPath to the data type relative to the data node.*/ | |
| 34 public static final String XPATH_DATA_TYPE = "@type"; | |
| 35 | |
| 36 /** The XPath to the data description relative to the data node.*/ | |
| 37 public static final String XPATH_DATA_DESCRIPTION = "@description"; | |
| 38 | |
| 39 | |
| 40 /** | |
| 41 * Creates a new State based on the configured class provided by | |
| 42 * <code>stateConf</code>. | |
| 43 * | |
| 44 * @param stateConf The configuration of the state. | |
| 45 * | |
| 46 * @return a State. | |
| 47 */ | |
| 48 public static State createState(Node stateConf) { | |
| 49 String clazz = (String) XMLUtils.xpath( | |
| 50 stateConf, XPATH_STATE, XPathConstants.STRING); | |
| 51 | |
| 52 State state = null; | |
| 53 | |
| 54 try { | |
| 55 logger.debug("Create a new State for class: " + clazz); | |
| 56 state = (State) Class.forName(clazz).newInstance(); | |
| 57 state.setup(stateConf); | |
| 58 | |
| 59 initializeStateData(state, stateConf); | |
| 60 } | |
| 61 catch (InstantiationException ie) { | |
| 62 logger.error(ie, ie); | |
| 63 } | |
| 64 catch (IllegalAccessException iae) { | |
| 65 logger.error(iae, iae); | |
| 66 } | |
| 67 catch (ClassNotFoundException cnfe) { | |
| 68 logger.error(cnfe, cnfe); | |
| 69 } | |
| 70 | |
| 71 return state; | |
| 72 } | |
| 73 | |
| 74 | |
| 75 /** | |
| 76 * This method extracts the configured input data of a state and adds new | |
| 77 * StateData objects to the State. | |
| 78 * | |
| 79 * @param state The state. | |
| 80 * @param stateConf The state configuration node. | |
| 81 */ | |
| 82 protected static void initializeStateData(State state, Node stateConf) { | |
| 83 NodeList dataList = (NodeList) XMLUtils.xpath( | |
| 84 stateConf, XPATH_DATA, XPathConstants.NODESET); | |
| 85 | |
| 86 if (dataList == null || dataList.getLength() == 0) { | |
| 87 logger.debug("The state has no input data configured."); | |
| 88 | |
| 89 return; | |
| 90 } | |
| 91 | |
| 92 int items = dataList.getLength(); | |
| 93 | |
| 94 logger.debug("The state has " + items + " data items configured."); | |
| 95 | |
| 96 for (int i = 0; i < items; i++) { | |
| 97 Node data = dataList.item(i); | |
| 98 | |
| 99 String name = (String) XMLUtils.xpath( | |
| 100 data, XPATH_DATA_NAME, XPathConstants.STRING); | |
| 101 String type = (String) XMLUtils.xpath( | |
| 102 data, XPATH_DATA_TYPE, XPathConstants.STRING); | |
| 103 String desc = (String) XMLUtils.xpath( | |
| 104 data, XPATH_DATA_DESCRIPTION, XPathConstants.STRING); | |
| 105 | |
| 106 if (name == null || name.length() == 0) { | |
| 107 logger.warn("No name for data item at pos " + i + " found."); | |
| 108 continue; | |
| 109 } | |
| 110 | |
| 111 if (type == null || type.length() == 0) { | |
| 112 logger.warn("No type for data item at pos " + i + " found."); | |
| 113 logger.warn("Default type 'string' used."); | |
| 114 type = "string"; | |
| 115 } | |
| 116 | |
| 117 logger.debug("add StateData '" + name + "' (type '" + type + "')"); | |
| 118 state.addData(name, new DefaultStateData(name, desc, type)); | |
| 119 } | |
| 120 } | |
| 121 } | |
| 122 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |