diff gnv-artifacts/src/main/java/de/intevation/gnv/transition/TransitionFactory.java @ 875:5e9efdda6894

merged gnv-artifacts/1.0
author Thomas Arendsen Hein <thomas@intevation.de>
date Fri, 28 Sep 2012 12:13:56 +0200
parents 05bf8534a35a
children f953c9a559d8
line wrap: on
line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gnv-artifacts/src/main/java/de/intevation/gnv/transition/TransitionFactory.java	Fri Sep 28 12:13:56 2012 +0200
@@ -0,0 +1,67 @@
+package de.intevation.gnv.transition;
+
+import org.apache.log4j.Logger;
+import org.w3c.dom.Node;
+
+import de.intevation.gnv.artifacts.GNVArtifactBase;
+
+/**
+ * This Factoryclass instantiates Objects of Type Transition.
+ * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a>
+ *
+ */
+public class TransitionFactory {
+
+    /**
+     * the logger, used to log exceptions and additonaly information
+     */
+    private static Logger log = Logger.getLogger(GNVArtifactBase.class);
+
+    /**
+     * The Singleton instance of the Transitionfactory.
+     */
+    private static TransitionFactory instance = null;
+
+    /**
+     * Constructor
+     */
+    public TransitionFactory() {
+        super();
+    }
+
+    /**
+     * Returns the Instance of this Class.
+     * @return the Instance of this Class.
+     */
+    public static TransitionFactory getInstance() {
+        if (instance == null) {
+            instance = new TransitionFactory();
+        }
+        return instance;
+    }
+
+    /**
+     * Creates a new Transition using the Configuration that is provided by the
+     * XML-Node.
+     * @param configuration The configuration that should be used to initialize
+     *                      the new Transition
+     * @return a new Transition.
+     */
+    public Transition createTransition(Node configuration) {
+        log.debug("TransitionFactory.createTransition");
+        Transition state = null;
+        try {
+            String classname = ((org.w3c.dom.Element)configuration).getAttribute("transition");
+            state = (Transition) (Class.forName(classname).newInstance());
+            state.setup(configuration);
+        } catch (InstantiationException e) {
+            log.error(e, e);
+        } catch (IllegalAccessException e) {
+            log.error(e, e);
+        } catch (ClassNotFoundException e) {
+            log.error(e, e);
+        }
+        return state;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :

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