Concept.java

/**
 * Copyright (c) 2009 International Health Terminology Standards Development
 * Organisation
 * 
 * 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.
 */
/**
 * Copyright CSIRO Australian e-Health Research Centre (http://aehrc.com).
 * All rights reserved. Use is subject to license terms and conditions.
 */

package au.csiro.snorocket.core.model;

/**
 * Represents a simple concept.
 * 
 * @author law223
 * 
 */
final public class Concept extends AbstractConcept {

    /**
     * Serialisation version.
     */
    private static final long serialVersionUID = 1L;
    
    final private int _hashcode;

    public Concept(final int id) {
        this._hashcode = id;
    }

    @Override
    public String toString() {
        return String.valueOf(_hashcode);
    }

    @Override
    public int hashCode() {
        return _hashcode;
    }

    @Override
    public boolean equals(Object obj) {
        return this == obj
                || (obj instanceof Concept && _hashcode == ((Concept) obj)._hashcode);
    }

    @Override
    int compareToWhenHashCodesEqual(AbstractConcept other) {
        return hashCode() - other.hashCode();
    }

}