Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/artifacts/states/StateFactory.java @ 2744:c1f2e792704a
FixA: Calculate Delta W/t, too.
flys-artifacts/trunk@4479 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
---|---|
date | Wed, 23 May 2012 18:27:45 +0000 |
parents | 45f7762767e2 |
children | e74e707ff650 |
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package de.intevation.flys.artifacts.states; import javax.xml.xpath.XPathConstants; import org.apache.log4j.Logger; import org.w3c.dom.Node; import org.w3c.dom.NodeList; import de.intevation.artifactdatabase.data.DefaultStateData; import de.intevation.artifactdatabase.state.State; import de.intevation.artifacts.common.utils.XMLUtils; /** * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> */ public class StateFactory { /** The logger used in this class */ private static Logger logger = Logger.getLogger(StateFactory.class); /** The XPath to the classname of the state */ public static final String XPATH_STATE = "@state"; /** The XPath to the data items of the state relative to the state node. */ public static final String XPATH_DATA = "data"; /** The XPath to the data name relative to the data node.*/ public static final String XPATH_DATA_NAME = "@name"; /** The XPath to the data type relative to the data node.*/ public static final String XPATH_DATA_TYPE = "@type"; /** The XPath to the data description relative to the data node.*/ public static final String XPATH_DATA_DESCRIPTION = "@description"; /** * Creates a new State based on the configured class provided by * <code>stateConf</code>. * * @param stateConf The configuration of the state. * * @return a State. */ public static State createState(Node stateConf) { String clazz = (String) XMLUtils.xpath( stateConf, XPATH_STATE, XPathConstants.STRING); State state = null; try { logger.debug("Create a new State for class: " + clazz); state = (State) Class.forName(clazz).newInstance(); state.setup(stateConf); initializeStateData(state, stateConf); } catch (InstantiationException ie) { logger.error(ie, ie); } catch (IllegalAccessException iae) { logger.error(iae, iae); } catch (ClassNotFoundException cnfe) { logger.error(cnfe, cnfe); } return state; } /** * This method extracts the configured input data of a state and adds new * StateData objects to the State. * * @param state The state. * @param stateConf The state configuration node. */ protected static void initializeStateData(State state, Node stateConf) { NodeList dataList = (NodeList) XMLUtils.xpath( stateConf, XPATH_DATA, XPathConstants.NODESET); if (dataList == null || dataList.getLength() == 0) { logger.debug("The state has no input data configured."); return; } int items = dataList.getLength(); logger.debug("The state has " + items + " data items configured."); for (int i = 0; i < items; i++) { Node data = dataList.item(i); String name = (String) XMLUtils.xpath( data, XPATH_DATA_NAME, XPathConstants.STRING); String type = (String) XMLUtils.xpath( data, XPATH_DATA_TYPE, XPathConstants.STRING); String desc = (String) XMLUtils.xpath( data, XPATH_DATA_DESCRIPTION, XPathConstants.STRING); if (name == null || name.equals("")) { logger.warn("No name for data item at pos " + i + " found."); continue; } if (type == null || type.equals("")) { logger.warn("No type for data item at pos " + i + " found."); logger.warn("Default type 'string' used."); type = "string"; } logger.debug("add StateData '" + name + "' (type '" + type + "')"); state.addData(name, new DefaultStateData(name, desc, type)); } } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :