ingo@106: package de.intevation.flys.artifacts.context;
ingo@106: 
ingo@106: import java.io.File;
ingo@106: import java.util.ArrayList;
ingo@295: import java.util.HashMap;
ingo@106: import java.util.List;
ingo@295: import java.util.Map;
ingo@106: 
ingo@106: import javax.xml.xpath.XPathConstants;
ingo@106: 
ingo@106: import org.apache.log4j.Logger;
ingo@106: 
ingo@106: import org.w3c.dom.Document;
ingo@106: import org.w3c.dom.Element;
ingo@295: import org.w3c.dom.Node;
ingo@106: import org.w3c.dom.NodeList;
ingo@106: 
ingo@106: import de.intevation.artifacts.ArtifactContextFactory;
ingo@106: 
ingo@106: import de.intevation.artifacts.common.utils.XMLUtils;
sascha@130: import de.intevation.artifacts.common.utils.Config;
ingo@106: 
ingo@107: import de.intevation.artifactdatabase.state.State;
ingo@107: import de.intevation.artifactdatabase.state.StateEngine;
ingo@107: import de.intevation.artifactdatabase.transition.Transition;
ingo@107: import de.intevation.artifactdatabase.transition.TransitionEngine;
ingo@106: 
ingo@107: import de.intevation.flys.artifacts.states.StateFactory;
ingo@106: import de.intevation.flys.artifacts.transitions.TransitionFactory;
ingo@341: import de.intevation.flys.themes.Theme;
ingo@341: import de.intevation.flys.themes.ThemeFactory;
ingo@106: 
ingo@106: 
ingo@106: /**
ingo@106:  * The ArtifactContextFactory is used to initialize basic components and put
ingo@106:  * them into the global context of the application.
ingo@106:  *
ingo@106:  * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
ingo@106:  */
ingo@106: public class FLYSContextFactory implements ArtifactContextFactory {
ingo@106: 
ingo@106:     /** The logger that is used in this class */
ingo@106:     private static Logger logger = Logger.getLogger(FLYSContextFactory.class);
ingo@106: 
ingo@106:     /** The XPath to the artifacts configured in the configuration. */
ingo@106:     public static final String XPATH_ARTIFACTS =
ingo@106:         "/artifact-database/artifacts/artifact";
ingo@106: 
ingo@106:     /** The XPath to the name of the artifact. */
ingo@107:     public static final String XPATH_ARTIFACT_NAME = "/artifact/@name";
ingo@106: 
ingo@106:     /** The XPath to the xlink ref in an artifact configuration. */
ingo@106:     public static final String XPATH_XLINK = "xlink:href";
ingo@106: 
ingo@106:     /** The XPath to the transitions configured in the artifact config. */
ingo@106:     public static final String XPATH_TRANSITIONS =
ingo@106:         "/artifact/states/transition";
ingo@106: 
ingo@107:     /** The XPath to the states configured in the artifact config. */
ingo@107:     public static final String XPATH_STATES =
ingo@107:         "/artifact/states/state";
ingo@107: 
ingo@295:     public static final String XPATH_OUTPUT_GENERATORS =
ingo@295:         "/artifact-database/output-generators/output-generator";
ingo@295: 
ingo@341:     public static final String XPATH_THEME_CONFIG =
ingo@341:         "/artifact-database/flys/themes/configuration/text()";
ingo@341: 
ingo@341:     public static final String XPATH_THEMES =
ingo@341:         "/themes/theme";
ingo@341: 
ingo@106:     /**
ingo@106:      * Creates a new FLYSArtifactContext object and initialize all
ingo@106:      * components required by the application.
ingo@106:      *
ingo@106:      * @param config The artifact server configuration.
ingo@106:      * @return a FLYSArtifactContext.
ingo@106:      */
ingo@106:     public Object createArtifactContext(Document config) {
ingo@106:         FLYSContext context = new FLYSContext(config);
ingo@106: 
ingo@106:         configureTransitions(config, context);
ingo@107:         configureStates(config, context);
ingo@295:         configureOutGenerators(config, context);
ingo@341:         configureThemes(config, context);
ingo@106: 
ingo@106:         return context;
ingo@106:     }
ingo@106: 
ingo@106: 
ingo@106:     /**
ingo@106:      * This method initializes the transition configuration.
ingo@106:      *
ingo@106:      * @param config the config document.
ingo@106:      * @param context the FLYSContext.
ingo@106:      */
ingo@106:     protected void configureTransitions(Document config, FLYSContext context) {
ingo@106:         TransitionEngine engine = new TransitionEngine();
ingo@106: 
ingo@106:         Document[] artifacts = getArtifactConfigurations(config);
ingo@106:         logger.info("Found " + artifacts.length + " artifacts in the config.");
ingo@106: 
ingo@106:         for (Document doc: artifacts) {
ingo@106:             List<Transition> transitions = new ArrayList<Transition>();
ingo@106: 
ingo@106:             String artName = (String) XMLUtils.xpath(
ingo@106:                 doc, XPATH_ARTIFACT_NAME, XPathConstants.STRING);
ingo@106: 
ingo@111:             NodeList list = (NodeList) XMLUtils.xpath(
ingo@106:                 doc, XPATH_TRANSITIONS, XPathConstants.NODESET);
ingo@106: 
ingo@111:             if (list == null) {
ingo@106:                 logger.warn("The artifact has no transitions configured.");
ingo@107:                 continue;
ingo@106:             }
ingo@106: 
ingo@111:             int trans = list.getLength();
ingo@106: 
ingo@106:             logger.info(
ingo@106:                 "Artifact '" + artName + "' has " + trans + " transitions.");
ingo@106: 
ingo@106:             for (int i = 0; i < trans; i++) {
ingo@111:                 Transition t = TransitionFactory.createTransition(list.item(i));
ingo@111:                 String     s = t.getFrom();
ingo@111:                 engine.addTransition(s, t);
ingo@106:             }
ingo@106:         }
ingo@106: 
ingo@106:         context.put(FLYSContext.TRANSITION_ENGINE_KEY, engine);
ingo@106:     }
ingo@106: 
ingo@106: 
ingo@106:     /**
ingo@106:      * This method returns all artifact documents defined in
ingo@106:      * <code>config</code>. <br>NOTE: The artifact configurations need to be
ingo@106:      * stored in own files referenced by an xlink.
ingo@106:      *
ingo@106:      * @param config The global configuration.
ingo@106:      *
ingo@106:      * @return an array of Artifact configurations.
ingo@106:      */
ingo@106:     protected Document[] getArtifactConfigurations(Document config) {
ingo@106:         NodeList artifacts = (NodeList) XMLUtils.xpath(
ingo@106:             config, XPATH_ARTIFACTS, XPathConstants.NODESET);
ingo@106: 
ingo@106:         int count = artifacts.getLength();
ingo@106: 
ingo@106:         Document[] artifactDocs = new Document[count];
ingo@106: 
ingo@106:         for (int i = 0; i < count; i++) {
ingo@106:             Element tmp = (Element) artifacts.item(i);
ingo@106: 
ingo@106:             String xlink = tmp.getAttribute(XPATH_XLINK);
ingo@106:             xlink        = Config.replaceConfigDir(xlink);
ingo@106: 
ingo@106:             File artifactFile = new File(xlink);
ingo@106:             artifactDocs[i]   = XMLUtils.parseDocument(artifactFile);
ingo@106:         }
ingo@106: 
ingo@106:         return artifactDocs;
ingo@106:     }
ingo@107: 
ingo@107: 
ingo@107:     /**
ingo@107:      * This method initializes the transition configuration.
ingo@107:      *
ingo@107:      * @param config the config document.
ingo@107:      * @param context the FLYSContext.
ingo@107:      */
ingo@107:     protected void configureStates(Document config, FLYSContext context) {
ingo@107:         StateEngine engine = new StateEngine();
ingo@107: 
ingo@107:         Document[] artifacts = getArtifactConfigurations(config);
ingo@107:         logger.info("Found " + artifacts.length + " artifacts in the config.");
ingo@107: 
ingo@107:         for (Document doc: artifacts) {
ingo@107:             List<State> states = new ArrayList<State>();
ingo@107: 
ingo@107:             String artName = (String) XMLUtils.xpath(
ingo@107:                 doc, XPATH_ARTIFACT_NAME, XPathConstants.STRING);
ingo@107: 
ingo@107:             NodeList stateList = (NodeList) XMLUtils.xpath(
ingo@107:                 doc, XPATH_STATES, XPathConstants.NODESET);
ingo@107: 
ingo@107:             if (stateList == null) {
ingo@107:                 logger.warn("The artifact has no states configured.");
ingo@107:                 continue;
ingo@107:             }
ingo@107: 
ingo@107:             int count = stateList.getLength();
ingo@107: 
ingo@107:             logger.info(
ingo@107:                 "Artifact '" + artName + "' has " + count + " states.");
ingo@107: 
ingo@107:             for (int i = 0; i < count; i++) {
ingo@107:                 states.add(StateFactory.createState(
ingo@107:                     stateList.item(i)));
ingo@107:             }
ingo@107: 
ingo@107:             engine.addStates(artName, states);
ingo@107:         }
ingo@107: 
ingo@107:         context.put(FLYSContext.STATE_ENGINE_KEY, engine);
ingo@107:     }
ingo@295: 
ingo@295: 
ingo@295:     /**
ingo@295:      * This method intializes the provided output generators.
ingo@295:      *
ingo@295:      * @param config the config document.
ingo@295:      * @param context the FLYSContext.
ingo@295:      */
ingo@295:     protected void configureOutGenerators(Document config, FLYSContext context){
ingo@295:         Map<String, Class> generators = new HashMap<String, Class>();
ingo@295: 
ingo@295:         NodeList outGenerators = (NodeList) XMLUtils.xpath(
ingo@295:             config,
ingo@295:             XPATH_OUTPUT_GENERATORS,
ingo@295:             XPathConstants.NODESET);
ingo@295: 
ingo@295:         int num = outGenerators == null ? 0 : outGenerators.getLength();
ingo@295: 
ingo@295:         if (num == 0) {
ingo@295:             logger.warn("No output generators configured in this application.");
ingo@295:             return;
ingo@295:         }
ingo@295: 
ingo@295:         logger.info("Found " + num + " configured output generators.");
ingo@295: 
ingo@295:         int idx = 0;
ingo@295: 
ingo@295:         for (int i = 0; i < num; i++) {
ingo@295:             Node item = outGenerators.item(i);
ingo@295: 
ingo@295:             String name = (String) XMLUtils.xpath(
ingo@295:                 item, "@name", XPathConstants.STRING);
ingo@295: 
ingo@295:             String clazz = (String) XMLUtils.xpath(
ingo@295:                 item, "text()", XPathConstants.STRING);
ingo@295: 
ingo@295:             if (name == null || clazz == null) {
ingo@295:                 continue;
ingo@295:             }
ingo@295: 
ingo@295:             try {
ingo@295:                 generators.put(name, Class.forName(clazz));
ingo@295: 
ingo@295:                 idx++;
ingo@295:             }
ingo@295:             catch (ClassNotFoundException cnfe) {
ingo@295:                 logger.warn(cnfe, cnfe);
ingo@295:             }
ingo@295:         }
ingo@295: 
ingo@295:         logger.info("Successfully loaded " + idx + " output generators.");
ingo@295:         context.put(FLYSContext.OUTGENERATORS_KEY, generators);
ingo@295:     }
ingo@341: 
ingo@341: 
ingo@341:     /**
ingo@341:      * This methods reads the configured themes and puts them into the
ingo@341:      * FLYSContext.
ingo@341:      *
ingo@341:      * @param config The global configuration.
ingo@341:      * @param context The FLYSContext.
ingo@341:      */
ingo@341:     protected void configureThemes(Document config, FLYSContext context) {
ingo@341:         logger.debug("FLYSContextFactory.configureThemes");
ingo@341: 
ingo@341:         Document cfg = getThemeConfig(config);
ingo@341: 
ingo@341:         NodeList themes = (NodeList) XMLUtils.xpath(
ingo@341:             cfg, XPATH_THEMES, XPathConstants.NODESET);
ingo@341: 
ingo@341:         int num = themes != null ? themes.getLength() : 0;
ingo@341: 
ingo@341:         if (num == 0) {
ingo@341:             logger.warn("There are no themes configured!");
ingo@341:             return;
ingo@341:         }
ingo@341: 
ingo@341:         logger.debug("Found " + num + " configured themes.");
ingo@341: 
ingo@341:         Map<String, Theme> theThemes = new HashMap<String, Theme>();
ingo@341: 
ingo@341:         for (int i = 0; i < num; i++) {
ingo@341:             Node theme = themes.item(i);
ingo@341: 
ingo@341:             Theme theTheme = ThemeFactory.createTheme(cfg, theme);
ingo@341: 
ingo@341:             if (theme != null) {
ingo@341:                 theThemes.put(theTheme.getName(), theTheme);
ingo@341:             }
ingo@341:         }
ingo@341: 
ingo@341:         logger.debug("Initialized " + theThemes.size() + "/" + num + " themes");
ingo@341: 
ingo@341:         context.put(FLYSContext.THEMES, theThemes);
ingo@341:     }
ingo@341: 
ingo@341: 
ingo@341:     /**
ingo@341:      * This method is used to retrieve the theme configuration document.
ingo@341:      *
ingo@341:      * @param config The global configuration.
ingo@341:      *
ingo@341:      * @return the theme configuration.
ingo@341:      */
ingo@341:     protected Document getThemeConfig(Document config) {
ingo@341:         String themeConfig = (String) XMLUtils.xpath(
ingo@341:             config,
ingo@341:             XPATH_THEME_CONFIG,
ingo@341:             XPathConstants.STRING);
ingo@341: 
ingo@341:         themeConfig = Config.replaceConfigDir(themeConfig);
ingo@341: 
ingo@341:         logger.debug("Parse theme cfg: " + themeConfig);
ingo@341: 
ingo@341:         return XMLUtils.parseDocument(new File(themeConfig));
ingo@341:     }
ingo@106: }
ingo@106: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :