Mercurial > dive4elements > framework
view artifact-database/src/main/java/de/intevation/artifactdatabase/FactoryBootstrap.java @ 20:ff666592c1c3
Added factory listing '/factories' to web app.
artifacts/trunk@51 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Wed, 09 Sep 2009 14:33:25 +0000 |
parents | 1259d192e3c3 |
children | ce488c1d3fc4 |
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package de.intevation.artifactdatabase; import org.w3c.dom.Document; import org.w3c.dom.NodeList; import java.util.ArrayList; import de.intevation.artifacts.ArtifactFactory; import de.intevation.artifacts.ArtifactContextFactory; import org.apache.log4j.Logger; /** * Bootstrap facility for the global context and the artifact factories. * * @author Sascha L. Teichmann (sascha.teichmann@intevation.de) */ public class FactoryBootstrap { private static Logger logger = Logger.getLogger(FactoryBootstrap.class); public static final String CONTEXT_FACTORY = "/artifact-database/factories/context-factory/text()"; public static final String DEFAULT_CONTEXT_FACTORY = "de.intevation.artifactdatabase.DefaultArtifactContextFactory"; public static final String ARTIFACT_FACTORIES = "/artifact-database/factories/artifact-factories/artifact-factory"; protected Object context; protected ArtifactFactory [] artifactFactories; public FactoryBootstrap() { } void buildContext() { String className = Config.getStringXPath( CONTEXT_FACTORY, DEFAULT_CONTEXT_FACTORY); ArtifactContextFactory factory = null; try { Class clazz = Class.forName(className); factory = (ArtifactContextFactory)clazz.newInstance(); } catch (ClassNotFoundException cnfe) { logger.error(cnfe.getLocalizedMessage(), cnfe); } catch (InstantiationException ie) { logger.error(ie.getLocalizedMessage(), ie); } catch (ClassCastException cce) { logger.error(cce.getLocalizedMessage(), cce); } catch (IllegalAccessException iae) { logger.error(iae.getLocalizedMessage(), iae); } if (factory == null) { factory = new DefaultArtifactContextFactory(); } logger.info("Using class '" + factory.getClass().getName() + "' for context creation."); context = factory.createArtifactContext(Config.getConfig()); } protected void loadArtifactFactories() { ArrayList loadedFactories = new ArrayList(); NodeList nodes = Config.getNodeSetXPath(ARTIFACT_FACTORIES); if (nodes == null) { logger.warn("No factories found"); } Document config = Config.getConfig(); for (int i = 0, N = nodes != null ? nodes.getLength() : 0; i < N; ++i) { String className = nodes.item(i).getTextContent(); ArtifactFactory factory = null; try { Class clazz = Class.forName(className); factory = (ArtifactFactory)clazz.newInstance(); } catch (ClassNotFoundException cnfe) { logger.error(cnfe.getLocalizedMessage(), cnfe); } catch (InstantiationException ie) { logger.error(ie.getLocalizedMessage(), ie); } catch (ClassCastException cce) { logger.error(cce.getLocalizedMessage(), cce); } catch (IllegalAccessException iae) { logger.error(iae.getLocalizedMessage(), iae); } if (factory != null) { factory.setup(config, nodes.item(i)); loadedFactories.add(factory); logger.info("Registering '" + factory.getName() + "' as artifact factory."); } } artifactFactories = (ArtifactFactory [])loadedFactories.toArray( new ArtifactFactory[loadedFactories.size()]); } public void boot() { buildContext(); loadArtifactFactories(); } public ArtifactFactory [] getArtifactFactories() { return artifactFactories; } public Object getContext() { return context; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8: