SecurityCategory.java

package com.lun.enumerated;

import com.lun.util.Enums;

//: enumerated/SecurityCategory.java
// More succinct subcategorization of enums.

enum SecurityCategory {
	STOCK(Security.Stock.class), BOND(Security.Bond.class);
	Security[] values;

	SecurityCategory(Class<? extends Security> kind) {
		values = kind.getEnumConstants();
	}

	interface Security {
		enum Stock implements Security {
			SHORT, LONG, MARGIN
		}

		enum Bond implements Security {
			MUNICIPAL, JUNK
		}
	}

	public Security randomSelection() {
		return Enums.random(values);
	}

	public static void main(String[] args) {
		for (int i = 0; i < 10; i++) {
			SecurityCategory category = Enums.random(SecurityCategory.class);
			System.out.println(category + ": " + category.randomSelection());
		}
	}
} /*
	 * Output: BOND: MUNICIPAL BOND: MUNICIPAL STOCK: MARGIN STOCK: MARGIN BOND:
	 * JUNK STOCK: SHORT STOCK: LONG STOCK: LONG BOND: MUNICIPAL BOND: JUNK
	 */// :~