/* ====================================================================
 * The Apache Software License, Version 1.1
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 * reserved.
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 *    any, must include the following acknowledgement:
 *       "This product includes software developed by the
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package org.apache.commons.lang.enum;

import java.util.Iterator;
import java.util.List;
import java.util.Map;

/**
 * Operator enumeration.
 *
 * @author Stephen Colebourne
 * @version $Id: OperationEnum.java,v 1.6 2003/08/18 02:22:27 bayard Exp $
 */
public abstract class OperationEnum extends Enum {
    // This syntax works for JDK 1.3 and upwards:
//    public static final OperationEnum PLUS = new OperationEnum("Plus") {
//        public int eval(int a, int b) {
//            return (a + b);
//        }
//    };
//    public static final OperationEnum MINUS = new OperationEnum("Minus") {
//        public int eval(int a, int b) {
//            return (a - b);
//        }
//    };
    // This syntax works for JDK 1.2 and upwards:
    public static final OperationEnum PLUS = new PlusOperation();
    private static class PlusOperation extends OperationEnum {
        private PlusOperation() {
            super("Plus");
        }
        public int eval(int a, int b) {
            return (a + b);
        }
    }
    public static final OperationEnum MINUS = new MinusOperation();
    private static class MinusOperation extends OperationEnum {
        private MinusOperation() {
            super("Minus");
        }
        public int eval(int a, int b) {
            return (a - b);
        }
    }

    private OperationEnum(String name) {
        super(name);
    }
    
    public final Class getEnumClass() {
        return OperationEnum.class;
    }

    public abstract int eval(int a, int b);

    public static OperationEnum getEnum(String name) {
        return (OperationEnum) getEnum(OperationEnum.class, name);
    }

    public static Map getEnumMap() {
        return getEnumMap(OperationEnum.class);
    }

    public static List getEnumList() {
        return getEnumList(OperationEnum.class);
    }

    public static Iterator iterator() {
        return iterator(OperationEnum.class);
    }
}