Mercurial > dive4elements > framework
view artifact-database/src/main/java/de/intevation/artifactdatabase/DefaultArtifactFactory.java @ 265:d52947ce8629
XMLUtils.xpathString() returns empty string not null.
artifacts/trunk@1976 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Mon, 23 May 2011 09:56:15 +0000 |
parents | b2115f484edb |
children | a367a0d011af |
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/* * Copyright (c) 2010 by Intevation GmbH * * This program is free software under the LGPL (>=v2.1) * Read the file LGPL.txt coming with the software for details * or visit http://www.gnu.org/licenses/ if it does not exist. */ package de.intevation.artifactdatabase; import de.intevation.artifacts.common.utils.Config; import de.intevation.artifacts.Artifact; import de.intevation.artifacts.ArtifactFactory; import de.intevation.artifacts.ArtifactSerializer; import org.apache.log4j.Logger; import org.w3c.dom.Document; import org.w3c.dom.Node; /** * Trivial implementation of the ArtifactFactory interface. * Time to live (ttl), name and description are configured * via the Node given to #setup(Document, Node) with attributes * of same name. The class name of the artifacts to be build by this * factory is configures with the attribute 'artifact'. * * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a> */ public class DefaultArtifactFactory implements ArtifactFactory { private static Logger logger = Logger.getLogger(DefaultArtifactFactory.class); /** * XPath to access the TTL of this artifact. */ public static final String XPATH_TTL = "@ttl"; /** * XPath to access the name of this factory. */ public static final String XPATH_NAME = "@name"; /** * XPath to access the description of this artifact factory. */ public static final String XPATH_DESCRIPTION = "@description"; /** * XPath to access the class name of the artifacts to be build * by this factory. */ public static final String XPATH_ARTIFACT = "@artifact"; /** * Default description of this factory if none is given by the * configuration. */ public static final String DEFAULT_DESCRIPTION = "No description available"; /** * Class to load if no artifact class is given in the configuration. */ public static final String DEFAULT_ARTIFACT = "de.intevation.artifactdatabase.DefaultArtifact"; /** * The Time to live of the artifacts build by this factory. */ protected Long ttl; /** * The name of this factory. */ protected String name; /** * The description of this factory. */ protected String description; /** * The class of the artifacts to be build by this factory. */ protected Class artifactClass; /** * Default constructor. */ public DefaultArtifactFactory() { } public String getName() { return name; } public String getDescription() { return description; } public Artifact createArtifact( String identifier, Object context, Document data ) { try { Artifact artifact = (Artifact)artifactClass.newInstance(); artifact.setup(identifier, this, context, data); return artifact; } catch (InstantiationException ie) { logger.error(ie.getLocalizedMessage(), ie); } catch (IllegalAccessException iae) { logger.error(iae.getLocalizedMessage(), iae); } catch (ClassCastException cce) { logger.error(cce.getLocalizedMessage(), cce); } return null; } public void setup(Document document, Node factoryNode) { String ttlString = Config.getStringXPath(factoryNode, XPATH_TTL); if (ttlString != null) { try { ttl = Long.valueOf(ttlString); } catch (NumberFormatException nfe) { logger.warn("'" + ttlString + "' is not an integer."); } } description = Config.getStringXPath( factoryNode, XPATH_DESCRIPTION, DEFAULT_DESCRIPTION); name = Config.getStringXPath( factoryNode, XPATH_NAME, toString()); String artifact = Config.getStringXPath( factoryNode, XPATH_ARTIFACT, DEFAULT_ARTIFACT); try { artifactClass = Class.forName(artifact); } catch (ClassNotFoundException cnfe) { logger.error(cnfe.getLocalizedMessage(), cnfe); } if (artifactClass == null) { artifactClass = DefaultArtifact.class; } } public Long timeToLiveUntouched(Artifact artifact, Object context) { return ttl; } public ArtifactSerializer getSerializer() { return DefaultArtifactSerializer.INSTANCE; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :