svn commit: r702394 - /geronimo/gshell/trunk/gshell-support/gshell-event/src/main/java/org/apache/geronimo/gshell/event/EventAdapter.java

[jd...@apache.org]

Author: jdillon
Date: Tue Oct  7 01:58:04 2008
New Revision: 702394

URL: http://svn.apache.org/viewvc?rev=702394&view=rev
Log:
Add typed event support (er hack)

Added:
    geronimo/gshell/trunk/gshell-support/gshell-event/src/main/java/org/apache/geronimo/gshell/event/EventAdapter.java   (with props)

Added: geronimo/gshell/trunk/gshell-support/gshell-event/src/main/java/org/apache/geronimo/gshell/event/EventAdapter.java
URL: http://svn.apache.org/viewvc/geronimo/gshell/trunk/gshell-support/gshell-event/src/main/java/org/apache/geronimo/gshell/event/EventAdapter.java?rev=702394&view=auto
==============================================================================
--- geronimo/gshell/trunk/gshell-support/gshell-event/src/main/java/org/apache/geronimo/gshell/event/EventAdapter.java (added)
+++ geronimo/gshell/trunk/gshell-support/gshell-event/src/main/java/org/apache/geronimo/gshell/event/EventAdapter.java Tue Oct  7 01:58:04 2008
@@ -0,0 +1,40 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.geronimo.gshell.event;
+
+/**
+ * Adapter for typed {@link Event} processing.
+ *
+ * @version $Rev$ $Date$
+ */
+public abstract class EventAdapter<T extends Event>
+    implements EventListener
+{
+    @SuppressWarnings({"unchecked"})
+    public void onEvent(final Event event) throws Exception {
+        // HACK: Can't check the type from T, so just handle the CCE, might not be very efficent though :-(
+        try {
+            handleEvent((T)event);    
+        }
+        catch (ClassCastException ignore) {}
+    }
+
+    protected abstract void handleEvent(T event) throws Exception;
+}
\ No newline at end of file

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