Index: /trunk/autoquest-core-usability-evaluation/src/main/java/de/ugoe/cs/autoquest/usability/tasktree/filters/TaskTreeNodeTypeFilter.java
===================================================================
--- /trunk/autoquest-core-usability-evaluation/src/main/java/de/ugoe/cs/autoquest/usability/tasktree/filters/TaskTreeNodeTypeFilter.java	(revision 1137)
+++ /trunk/autoquest-core-usability-evaluation/src/main/java/de/ugoe/cs/autoquest/usability/tasktree/filters/TaskTreeNodeTypeFilter.java	(revision 1137)
@@ -0,0 +1,52 @@
+//   Copyright 2012 Georg-August-Universität Göttingen, Germany
+//
+//   Licensed 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 de.ugoe.cs.autoquest.usability.tasktree.filters;
+
+import com.google.common.base.Predicate;
+import com.google.common.base.Predicates;
+
+import de.ugoe.cs.autoquest.tasktrees.treeifc.IEventTask;
+import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskTreeNode;
+
+/**
+ * <p>
+ * TODO comment
+ * </p>
+ * 
+ * @author Alexander Deicke
+ */
+public enum TaskTreeNodeTypeFilter implements TaskTreeNodeFilter<ITaskTreeNode> {
+
+    EVENT_TASK_NODE(IEventTask.class);
+
+    private Class<? extends ITaskTreeNode> nodeTypeClazz;
+
+    private TaskTreeNodeTypeFilter(Class<? extends ITaskTreeNode> nodeTypeClazz) {
+        this.nodeTypeClazz = nodeTypeClazz;
+    }
+
+    @SuppressWarnings("unchecked")
+    @Override
+    public Class<ITaskTreeNode> clazz() {
+        return (Class<ITaskTreeNode>) this.nodeTypeClazz;
+    }
+
+    @SuppressWarnings("rawtypes")
+    @Override
+    public Predicate filterPredicate() {
+        return Predicates.instanceOf(IEventTask.class);
+    }
+
+}