category.java

Mandarax是一个规则引擎的纯Java实现。它支持多类型的事实和基于反映的规则

/*
 * Copyright (C) 1999-2004 <A href="http://www-ist.massey.ac.nz/JBDietrich" target="_top">Jens Dietrich</a>
 *
 * This library 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 2 of the License, or (at your option) any later version.
 *
 * This library 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 this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package org.mandarax.examples.crm.domainmodel;


/**
 * Represents a categories of customers. Something like "Gold customer program".
 * @author <A href="http://www-ist.massey.ac.nz/JBDietrich" target="_top">Jens Dietrich</A>
 * @version 3.4 <7 March 05>
 * @since 1.2
 */
public class Category extends BusinessObject {

    public final static Category PLATINUM    = new Category("Platinum");
    public final static Category GOLD        = new Category("Gold");
    public final static Category STANDARD    = new Category("Standard");
    private String description = "?";

    /**
     * Constructor.
     * @param aDescription java.lang.String
     */
    public Category() {
        super ();
    }
    
    /**
     * Constructor.
     * @param aDescription java.lang.String
     */
    public Category(String aDescription) {
        super ();

        description = aDescription;
    }

    /**
     * Compares objects.
     * @return boolean
     * @param obj java.lang.Object
     */
    public boolean equals(Object obj) {
        return(obj instanceof Category) && description.equals (((Category) obj).description);
    }

    /**
     * Get the description.
     * @return java.lang.String
     */
    public String getDescription() {
        return description;
    }

    /**
     * Get the hash code.
     * @return int
     */
    public int hashCode() {
        return(description == null)
              ? 0
              : description.hashCode ();
    }

    /**
     * Convert the object to a string.
     * @return java.lang.String
     */
    public String toString() {
        return getDescription ();
    }
}