diff gnv-artifacts/src/main/java/de/intevation/gnv/transition/TransitionFactory.java @ 337:a887074460b6

Last Step of the Refactoring Work on the Transition Model. Splitted Businesslogic between States and Transitions. Splitted the ConfigurationElements of State and Transition in several XML-Fragments. gnv-artifacts/trunk@403 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Tim Englich <tim.englich@intevation.de>
date Tue, 08 Dec 2009 13:38:21 +0000
parents
children 9a828e5a2390
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gnv-artifacts/src/main/java/de/intevation/gnv/transition/TransitionFactory.java	Tue Dec 08 13:38:21 2009 +0000
@@ -0,0 +1,55 @@
+/**
+ *
+ */
+package de.intevation.gnv.transition;
+
+import org.apache.log4j.Logger;
+import org.w3c.dom.Node;
+
+import de.intevation.gnv.artifacts.GNVArtifactBase;
+
+/**
+ * @author Tim Englich <tim.englich@intevation.de>
+ * 
+ */
+public class TransitionFactory {
+
+    /**
+     * the logger, used to log exceptions and additonaly information
+     */
+    private static Logger log = Logger.getLogger(GNVArtifactBase.class);
+
+    private static TransitionFactory instance = null;
+
+    /**
+     * Constructor
+     */
+    public TransitionFactory() {
+        super();
+    }
+
+    public static TransitionFactory getInstance() {
+        if (instance == null) {
+            instance = new TransitionFactory();
+        }
+        return instance;
+    }
+
+    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;
+    }
+
+}

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