categorized.java

来自「MegaMek is a networked Java clone of Bat」· Java 代码 · 共 62 行

/*
 * MegaMek - Copyright (C) 2004 Ben Mazur ([e-mail])
 *
 *  This program is free software; you can redistribute it and/or modify it
 *  under the terms of the GNU General Public License as published by the Free
 *  Software Foundation; either version 2 of the License, or (at your option)
 *  any later version.
 *
 *  This program 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 General Public License
 *  for more details.
 */

package megamek.common.util;

import java.util.Enumeration;

/**
 * This interface represents a collection of items organized according to
 * categories.  These categories are not necessarily hierarchical.
 *
 * Created on January 17, 2004
 *
 * @author  James Damour
 * @version 1
 */
public interface Categorized {

    /**
     * Get the names of all the categories.
     *
     * @return  an <code>Enumeration</code> of <code>String</code> names.
     *          This value will not be <code>null</code>, but it may be empty.
     */
    public Enumeration getCategoryNames();

    /**
     * Get the names of all the items in one of the categories.
     *
     * @param   categoryName - the <code>String</code> name of the category
     *          whose item names are required.
     * @return  an <code>Enumeration</code> of <code>String</code> names.
     *          This value will not be <code>null</code>, but it may be empty.
     */
    public Enumeration getItemNames( String categoryName );

    /**
     * Get the indicated item from the correct catagory.
     *
     * @param   categoryName - the <code>String</code> name of the category
     *          whose item names are required.
     * @param   itemName - the <code>String</code> name of the indicated item.
     * @return  the <code>Object<code> in the correct category with the given
     *          name.  This value may be <code>null</code>.
     * @throws  <code>Exception</code> if there's any error getting the item.
     */
    public Object getItem( String categoryName, String itemName ) 
        throws Exception;

}