code: package it.unibz.inf.ontop.spec.ontology.impl;
  
  import it.unibz.inf.ontop.spec.ontology.BinaryAxiom;
  
  /*
   * #%L
   * ontop-obdalib-core
   * %%
   * Copyright (C) 2009 - 2014 Free University of Bozen-Bolzano
   * %%
   * 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.
   * #L%
   */
  
  
  
  public class BinaryAxiomImpl<T> implements BinaryAxiom<T> {
  
  	private final T including; // right-hand side
  	private final T included;
  	private final String string;
  	
  	BinaryAxiomImpl(T subDesc, T superDesc) {
  		included = subDesc;
  		including = superDesc;
  		StringBuilder bf = new StringBuilder();
  		bf.append(included.toString());
  		bf.append(" ISA ");
  		bf.append(including.toString());
  		string = bf.toString();
  	}
  
  	@Override
  	public T getSub() {
  		return included;
  	}
  
  	@Override
  	public T getSuper() {
  		return including;
  	}
  
  	@Override
  	public boolean equals(Object obj) {
  		if (obj instanceof BinaryAxiomImpl<?>) {
  			BinaryAxiomImpl<T> inc2 = (BinaryAxiomImpl<T>) obj;
  			return including.equals(inc2.including) && included.equals(inc2.included);
  		}
  		return false;
  	}
  	
  	@Override
  	public int hashCode() {
  		return string.hashCode();
  	}
  
  	@Override
  	public String toString() {
  		return string;
  	}
  }
  