--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/datacage/templating/FunctionResolver.java	Tue Aug 27 18:37:24 2013 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/datacage/templating/FunctionResolver.java	Tue Aug 27 19:14:12 2013 +0200
@@ -10,10 +10,12 @@
 
 import java.text.SimpleDateFormat;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.Date;
 import java.util.List;
 import java.util.Map;
 import java.util.HashMap;
+import java.util.Set;
 
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
@@ -25,6 +27,10 @@
 import javax.xml.xpath.XPathFunctionResolver;
 
 import org.apache.log4j.Logger;
+import org.dive4elements.artifactdatabase.transition.TransitionEngine;
+import org.dive4elements.artifacts.GlobalContext;
+import org.dive4elements.river.artifacts.context.RiverContext;
+import org.dive4elements.river.artifacts.context.RiverContextFactory;
 
 
 /** Resolves functions (e.g. dc:contains) in Datacage/Meta-Data system. */
@@ -151,6 +157,19 @@
                 return StackFrames.NULL;
             }
         });
+
+        addFunction("all-state-successors", 2, new XPathFunction() {
+            @Override
+            public Object evaluate(List args) throws XPathFunctionException {
+                Object artifactName  = args.get(0);
+                Object stateId       = args.get(1);
+
+                return artifactName instanceof String
+                    && stateId      instanceof String 
+                    ? allStateSuccessors((String)artifactName, (String)stateId)
+                    : Collections.<String>emptySet();
+            }
+        });
     }
 
     /**
@@ -378,5 +397,18 @@
         }
         return "";
     }
+
+    public Set<String> allStateSuccessors(String artifactName, String stateId) {
+        GlobalContext gc = RiverContextFactory.getGlobalContext();
+        if (gc == null) {
+            return Collections.<String>emptySet();
+        }
+        Object o = gc.get(RiverContext.TRANSITION_ENGINE_KEY);
+        if (o instanceof TransitionEngine) {
+            TransitionEngine te = (TransitionEngine)o;
+            return te.allRecursiveSuccessorStateIds(artifactName, stateId);
+        }
+        return Collections.<String>emptySet();
+    }
 }
 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :