1 files changed, 36 insertions, 0 deletions

diff --git a/src/uk/ac/ox/cs/pagoda/constraints/ToBeRemovedBottom.java b/src/uk/ac/ox/cs/pagoda/constraints/ToBeRemovedBottom.java
new file mode 100644
index 0000000..415119a
--- /dev/null
+++ b/src/uk/ac/ox/cs/pagoda/constraints/ToBeRemovedBottom.java
@@ -0,0 +1,36 @@
+package uk.ac.ox.cs.pagoda.constraints;
+
+import java.util.Collection;
+import java.util.LinkedList;
+
+import org.semanticweb.HermiT.model.Atom;
+import org.semanticweb.HermiT.model.DLClause;
+import org.semanticweb.HermiT.model.Term;
+
+public class ToBeRemovedBottom implements BottomStrategy {
+
+        @Override
+        public Collection<DLClause> process(Collection<DLClause> clauses) {
+                Collection<DLClause> ret = new LinkedList<DLClause>(); 
+                for (DLClause clause: clauses)
+                        if (clause.getHeadLength() != 0)
+                                ret.add(clause); 
+                return ret;
+        }
+
+        @Override
+        public boolean isBottomRule(DLClause clause) {
+                return false;
+        }
+
+        @Override
+        public Atom[] getEmptyHead(Term t) {
+                return null;
+        }
+
+        @Override
+        public int getBottomNumber() {
+                return 0;
+        }
+
+}