Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/artifacts/context/FLYSContextFactory.java @ 329:0b2358bc716d
Discharge table: Added static method getWForQ() to interpolate a w value for a given q value based on a given discharge table.
flys-artifacts/trunk@1727 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Tue, 19 Apr 2011 11:05:27 +0000 |
parents | 53c155bfde07 |
children | eca7892bf8ff |
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package de.intevation.flys.artifacts.context; import java.io.File; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import javax.xml.xpath.XPathConstants; import org.apache.log4j.Logger; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.Node; import org.w3c.dom.NodeList; import de.intevation.artifacts.ArtifactContextFactory; import de.intevation.artifacts.common.utils.XMLUtils; import de.intevation.artifacts.common.utils.Config; import de.intevation.artifactdatabase.state.State; import de.intevation.artifactdatabase.state.StateEngine; import de.intevation.artifactdatabase.transition.Transition; import de.intevation.artifactdatabase.transition.TransitionEngine; import de.intevation.flys.artifacts.states.StateFactory; import de.intevation.flys.artifacts.transitions.TransitionFactory; /** * The ArtifactContextFactory is used to initialize basic components and put * them into the global context of the application. * * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> */ public class FLYSContextFactory implements ArtifactContextFactory { /** The logger that is used in this class */ private static Logger logger = Logger.getLogger(FLYSContextFactory.class); /** The XPath to the artifacts configured in the configuration. */ public static final String XPATH_ARTIFACTS = "/artifact-database/artifacts/artifact"; /** The XPath to the name of the artifact. */ public static final String XPATH_ARTIFACT_NAME = "/artifact/@name"; /** The XPath to the xlink ref in an artifact configuration. */ public static final String XPATH_XLINK = "xlink:href"; /** The XPath to the transitions configured in the artifact config. */ public static final String XPATH_TRANSITIONS = "/artifact/states/transition"; /** The XPath to the states configured in the artifact config. */ public static final String XPATH_STATES = "/artifact/states/state"; public static final String XPATH_OUTPUT_GENERATORS = "/artifact-database/output-generators/output-generator"; /** * Creates a new FLYSArtifactContext object and initialize all * components required by the application. * * @param config The artifact server configuration. * @return a FLYSArtifactContext. */ public Object createArtifactContext(Document config) { FLYSContext context = new FLYSContext(config); configureTransitions(config, context); configureStates(config, context); configureOutGenerators(config, context); return context; } /** * This method initializes the transition configuration. * * @param config the config document. * @param context the FLYSContext. */ protected void configureTransitions(Document config, FLYSContext context) { TransitionEngine engine = new TransitionEngine(); Document[] artifacts = getArtifactConfigurations(config); logger.info("Found " + artifacts.length + " artifacts in the config."); for (Document doc: artifacts) { List<Transition> transitions = new ArrayList<Transition>(); String artName = (String) XMLUtils.xpath( doc, XPATH_ARTIFACT_NAME, XPathConstants.STRING); NodeList list = (NodeList) XMLUtils.xpath( doc, XPATH_TRANSITIONS, XPathConstants.NODESET); if (list == null) { logger.warn("The artifact has no transitions configured."); continue; } int trans = list.getLength(); logger.info( "Artifact '" + artName + "' has " + trans + " transitions."); for (int i = 0; i < trans; i++) { Transition t = TransitionFactory.createTransition(list.item(i)); String s = t.getFrom(); engine.addTransition(s, t); } } context.put(FLYSContext.TRANSITION_ENGINE_KEY, engine); } /** * This method returns all artifact documents defined in * <code>config</code>. <br>NOTE: The artifact configurations need to be * stored in own files referenced by an xlink. * * @param config The global configuration. * * @return an array of Artifact configurations. */ protected Document[] getArtifactConfigurations(Document config) { NodeList artifacts = (NodeList) XMLUtils.xpath( config, XPATH_ARTIFACTS, XPathConstants.NODESET); int count = artifacts.getLength(); Document[] artifactDocs = new Document[count]; for (int i = 0; i < count; i++) { Element tmp = (Element) artifacts.item(i); String xlink = tmp.getAttribute(XPATH_XLINK); xlink = Config.replaceConfigDir(xlink); File artifactFile = new File(xlink); artifactDocs[i] = XMLUtils.parseDocument(artifactFile); } return artifactDocs; } /** * This method initializes the transition configuration. * * @param config the config document. * @param context the FLYSContext. */ protected void configureStates(Document config, FLYSContext context) { StateEngine engine = new StateEngine(); Document[] artifacts = getArtifactConfigurations(config); logger.info("Found " + artifacts.length + " artifacts in the config."); for (Document doc: artifacts) { List<State> states = new ArrayList<State>(); String artName = (String) XMLUtils.xpath( doc, XPATH_ARTIFACT_NAME, XPathConstants.STRING); NodeList stateList = (NodeList) XMLUtils.xpath( doc, XPATH_STATES, XPathConstants.NODESET); if (stateList == null) { logger.warn("The artifact has no states configured."); continue; } int count = stateList.getLength(); logger.info( "Artifact '" + artName + "' has " + count + " states."); for (int i = 0; i < count; i++) { states.add(StateFactory.createState( stateList.item(i))); } engine.addStates(artName, states); } context.put(FLYSContext.STATE_ENGINE_KEY, engine); } /** * This method intializes the provided output generators. * * @param config the config document. * @param context the FLYSContext. */ protected void configureOutGenerators(Document config, FLYSContext context){ Map<String, Class> generators = new HashMap<String, Class>(); NodeList outGenerators = (NodeList) XMLUtils.xpath( config, XPATH_OUTPUT_GENERATORS, XPathConstants.NODESET); int num = outGenerators == null ? 0 : outGenerators.getLength(); if (num == 0) { logger.warn("No output generators configured in this application."); return; } logger.info("Found " + num + " configured output generators."); int idx = 0; for (int i = 0; i < num; i++) { Node item = outGenerators.item(i); String name = (String) XMLUtils.xpath( item, "@name", XPathConstants.STRING); String clazz = (String) XMLUtils.xpath( item, "text()", XPathConstants.STRING); if (name == null || clazz == null) { continue; } try { generators.put(name, Class.forName(clazz)); idx++; } catch (ClassNotFoundException cnfe) { logger.warn(cnfe, cnfe); } } logger.info("Successfully loaded " + idx + " output generators."); context.put(FLYSContext.OUTGENERATORS_KEY, generators); } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :