/* Copyright 2008, 2009, 2010 by the Oxford University Computing Laboratory
This file is part of HermiT.
HermiT is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
HermiT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with HermiT. If not, see <http://www.gnu.org/licenses/>.
*/
package org.semanticweb.HermiT.model;
import org.semanticweb.HermiT.Prefixes;
/**
* Represents an inverse role.
*/
public class InverseRole extends Role {
private static final long serialVersionUID=3351701933728011998L;
protected final AtomicRole m_inverseOf;
public InverseRole(AtomicRole inverseOf) {
m_inverseOf=inverseOf;
}
public AtomicRole getInverseOf() {
return m_inverseOf;
}
public Role getInverse() {
return m_inverseOf;
}
public Atom getRoleAssertion(Term term0,Term term1) {
return Atom.create(m_inverseOf,term1,term0);
}
public String toString(Prefixes prefixes) {
return "inv("+m_inverseOf.toString(prefixes)+")";
}
protected Object readResolve() {
return s_interningManager.intern(this);
}
protected static InterningManager<InverseRole> s_interningManager=new InterningManager<InverseRole>() {
protected boolean equal(InverseRole object1,InverseRole object2) {
return object1.m_inverseOf==object2.m_inverseOf;
}
protected int getHashCode(InverseRole object) {
return -object.m_inverseOf.hashCode();
}
};
public static InverseRole create(AtomicRole inverseOf) {
return s_interningManager.intern(new InverseRole(inverseOf));
}
}