sascha@5: package de.intevation.artifactdatabase;
sascha@5: 
sascha@5: import org.w3c.dom.Document;
sascha@5: import org.w3c.dom.NodeList;
sascha@5: 
sascha@5: import java.util.ArrayList;
sascha@5: 
sascha@5: import de.intevation.artifacts.ArtifactFactory;
sascha@5: import de.intevation.artifacts.ArtifactContextFactory;
sascha@5: 
sascha@17: import org.apache.log4j.Logger;
sascha@17: 
sascha@5: /**
sascha@5:  * Bootstrap facility for the global context and the artifact factories.
sascha@5:  *
sascha@5:  * @author Sascha L. Teichmann (sascha.teichmann@intevation.de)
sascha@5:  */
sascha@5: public class FactoryBootstrap
sascha@5: {
sascha@17:     private static Logger logger = Logger.getLogger(FactoryBootstrap.class);
sascha@17: 
sascha@5:     public static final String CONTEXT_FACTORY =
sascha@5:         "/artifact-database/factories/context-factory/text()";
sascha@5: 
sascha@5:     public static final String DEFAULT_CONTEXT_FACTORY =
sascha@5:         "de.intevation.artifactdatabase.DefaultArtifactContextFactory";
sascha@5: 
sascha@5:     public static final String ARTIFACT_FACTORIES =
tim@16:         "/artifact-database/factories/artifact-factories/artifact-factory";
sascha@5: 
sascha@5:     protected Object context;
sascha@5: 
sascha@5:     protected ArtifactFactory [] artifactFactories;
sascha@5: 
sascha@5:     public FactoryBootstrap() {
sascha@5:     }
sascha@5: 
sascha@5:     void buildContext() {
sascha@5:         String className = Config.getStringXPath(
sascha@5:             CONTEXT_FACTORY, DEFAULT_CONTEXT_FACTORY);
sascha@5: 
sascha@5:         ArtifactContextFactory factory = null;
sascha@5: 
sascha@5:         try {
sascha@5:             Class clazz = Class.forName(className);
sascha@5:             factory = (ArtifactContextFactory)clazz.newInstance();
sascha@5:         }
sascha@5:         catch (ClassNotFoundException cnfe) {
sascha@17:             logger.error(cnfe.getLocalizedMessage(), cnfe);
sascha@5:         }
sascha@5:         catch (InstantiationException ie) {
sascha@17:             logger.error(ie.getLocalizedMessage(), ie);
sascha@5:         }
sascha@5:         catch (ClassCastException cce) {
sascha@17:             logger.error(cce.getLocalizedMessage(), cce);
sascha@5:         }
sascha@5:         catch (IllegalAccessException iae) {
sascha@17:             logger.error(iae.getLocalizedMessage(), iae);
sascha@5:         }
sascha@5: 
sascha@5:         if (factory == null) {
sascha@5:             factory = new DefaultArtifactContextFactory();
sascha@5:         }
sascha@5: 
sascha@19:         logger.info("Using class '" + factory.getClass().getName()
sascha@19:             + "' for context creation.");
sascha@19: 
sascha@5:         context = factory.createArtifactContext(Config.getConfig());
sascha@5:     }
sascha@5: 
sascha@5:     protected void loadArtifactFactories() {
sascha@5:         ArrayList loadedFactories = new ArrayList();
sascha@5: 
sascha@5:         NodeList nodes = Config.getNodeSetXPath(ARTIFACT_FACTORIES);
sascha@5: 
sascha@10:         if (nodes == null) {
sascha@17:             logger.warn("No factories found");
sascha@10:         }
sascha@10: 
sascha@5:         Document config = Config.getConfig();
sascha@5: 
sascha@19:         for (int i = 0, N = nodes != null ? nodes.getLength() : 0; i < N; ++i) {
sascha@5:             String className = nodes.item(i).getTextContent();
sascha@5: 
sascha@5:             ArtifactFactory factory = null;
sascha@5: 
sascha@5:             try {
sascha@5:                 Class clazz = Class.forName(className);
sascha@5:                 factory = (ArtifactFactory)clazz.newInstance();
sascha@5:             }
sascha@5:             catch (ClassNotFoundException cnfe) {
sascha@17:                 logger.error(cnfe.getLocalizedMessage(), cnfe);
sascha@5:             }
sascha@5:             catch (InstantiationException ie) {
sascha@17:                 logger.error(ie.getLocalizedMessage(), ie);
sascha@5:             }
sascha@5:             catch (ClassCastException cce) {
sascha@17:                 logger.error(cce.getLocalizedMessage(), cce);
sascha@5:             }
sascha@5:             catch (IllegalAccessException iae) {
sascha@17:                 logger.error(iae.getLocalizedMessage(), iae);
sascha@5:             }
sascha@5: 
sascha@5:             if (factory != null) {
sascha@19:                 factory.setup(config, nodes.item(i));
sascha@5:                 loadedFactories.add(factory);
sascha@19:                 logger.info("Registering '" + factory.getName() + "' as artifact factory.");
sascha@5:             }
sascha@5:         }
sascha@5: 
sascha@5:         artifactFactories = (ArtifactFactory [])loadedFactories.toArray(
sascha@5:             new ArtifactFactory[loadedFactories.size()]);
sascha@5:     }
sascha@5: 
sascha@5:     public void boot() {
sascha@5:         buildContext();
sascha@5:         loadArtifactFactories();
sascha@5:     }
sascha@5: 
sascha@5:     public ArtifactFactory [] getArtifactFactories() {
sascha@5:         return artifactFactories;
sascha@5:     }
sascha@5: 
sascha@5:     public Object getContext() {
sascha@5:         return context;
sascha@5:     }
sascha@5: }
sascha@5: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8: