Do not implement getInverseProperty and getNamedProperty in OWLObject…

…PropertyExpressionImpl.

Make getSimplified return the current object, since all legal OPEs are irreducible.

impl/src/main/java/uk/ac/manchester/cs/owl/owlapi/OWLObjectPropertyExpressionImpl.java

@@ -12,14 +12,8 @@
  * 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 uk.ac.manchester.cs.owl.owlapi;
 
-import static org.semanticweb.owlapi.util.OWLAPIPreconditions.verifyNotNull;
-
 import javax.annotation.Nonnull;
-
-import org.semanticweb.owlapi.model.OWLObjectInverseOf;
-import org.semanticweb.owlapi.model.OWLObjectProperty;
 import org.semanticweb.owlapi.model.OWLObjectPropertyExpression;
-import org.semanticweb.owlapi.util.ObjectPropertySimplifier;
 
 /**
  * @author Matthew Horridge, The University Of Manchester, Bio-Health
@@ -57,31 +51,7 @@ public boolean equals(Object obj) {
     @Nonnull
     @Override
     public OWLObjectPropertyExpression getSimplified() {
-        if (simplestForm == null) {
-            ObjectPropertySimplifier simplifier = new ObjectPropertySimplifier(
-                    new OWLDataFactoryImpl());
-            simplestForm = simplifier.getSimplified(this);
-        }
-        return verifyNotNull(simplestForm);
+        return this;
     }
 
-    @Nonnull
-    @Override
-    public OWLObjectPropertyExpression getInverseProperty() {
-        if (inverse == null) {
-            inverse = new OWLObjectInverseOfImpl(this);
-        }
-        return verifyNotNull(inverse);
-    }
-
-    @Override
-    public OWLObjectProperty getNamedProperty() {
-        OWLObjectPropertyExpression simp = getSimplified();
-        if (simp.isAnonymous()) {
-            return ((OWLObjectInverseOf) simp).getInverse()
-                    .asOWLObjectProperty();
-        } else {
-            return simp.asOWLObjectProperty();
-        }
-    }
 }