--- a/ChangeLog	Tue Mar 01 16:26:27 2011 +0000
+++ b/ChangeLog	Tue Mar 01 16:31:52 2011 +0000
@@ -1,3 +1,8 @@
+2011-03-01  Ingo Weinzierl <ingo@intevation.de>
+
+	* artifact-database/src/main/java/de/intevation/artifactdatabase/DefaultArtifactCollectionFactory.java:
+	  A default implementation of an ArtifactCollectionFactory.
+
 2011-03-01	Sascha L. Teichmann <sascha.teichmann@intevation.de>
 
 	* artifact-database/doc/schema-pg.sql,

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifact-database/src/main/java/de/intevation/artifactdatabase/DefaultArtifactCollectionFactory.java	Tue Mar 01 16:31:52 2011 +0000
@@ -0,0 +1,183 @@
+/*
+ * Copyright (c) 2011 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 org.apache.log4j.Logger;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Node;
+
+import de.intevation.artifacts.ArtifactCollection;
+import de.intevation.artifacts.ArtifactCollectionFactory;
+
+
+/**
+ * The default implementation of a ArtifactCollectionFactory.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class DefaultArtifactCollectionFactory
+implements   ArtifactCollectionFactory
+{
+    /** The logger that is used in this factory.*/
+    private static Logger logger =
+        Logger.getLogger(DefaultArtifactCollectionFactory.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_ARTIFACTCOLLECTION = "@artifact-collection";
+
+    /**
+     * 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_ARTIFACTCOLLECTION =
+        "de.intevation.artifactdatabase.DefaultArtifact";
+
+
+    /** The name of the factory.*/
+    protected String name;
+
+    /** The description of the factory.*/
+    protected String description;
+
+    /** The class that is used to instantiate new ArtifactCollection.*/
+    protected Class clazz;
+
+    /** The time to live of the artifact collection build by this factory.*/
+    protected Long ttl;
+
+
+    /**
+     * The default constructor.
+     */
+    public DefaultArtifactCollectionFactory() {
+    }
+
+
+   /**
+    * The short name of this factory.
+    *
+    * @return the name of this factory.
+    */
+    public String getName() {
+        return name;
+    }
+
+
+    /**
+     * Description of this factory.
+     *
+     * @return description of the factory.
+     */
+    public String getDescription() {
+        return description;
+    }
+
+
+    /**
+     * Returns the time to live of the given artifact.
+     *
+     * @param artifact
+     */
+    public Long timeToLiveUntouched(
+        ArtifactCollection collection,
+        Object             context)
+    {
+        return ttl;
+    }
+
+
+    /**
+     * Create a new artifact of certain type, given a general purpose context and
+     * an identifier.
+     * @param context a context from the ArtifactDatabase.
+     * @param identifier unique identifer for the new artifact
+     * @param data  the data containing more details for the setup of an Artifact.
+     * @return a new {@linkplain de.intevation.artifacts.ArtifactCollection ArtifactCollection}
+     */
+    public ArtifactCollection createCollection(
+        String   identifier,
+        Object   context,
+        Document data)
+    {
+        try {
+            ArtifactCollection collection =
+                (ArtifactCollection) clazz.newInstance();
+
+            collection.setup(identifier, this, context, data);
+
+            return collection;
+        }
+        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;
+    }
+
+    /**
+     * Setup the factory with a given configuration
+     * @param config the configuration
+     * @param factoryNode the ConfigurationNode of this Factory
+     */
+    public void setup(Document config, 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 artifactCollection = Config.getStringXPath(
+            factoryNode, XPATH_ARTIFACTCOLLECTION, DEFAULT_ARTIFACTCOLLECTION);
+
+        try {
+            clazz = Class.forName(artifactCollection);
+        }
+        catch (ClassNotFoundException cnfe) {
+            logger.error(cnfe.getLocalizedMessage(), cnfe);
+        }
+
+        if (clazz == null) {
+            clazz = DefaultArtifactCollection.class;
+        }
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :