01: package org.obe.convert;
02:
03: /**
04: * @author Adrian Price
05: */
06: public interface Calculator extends ClassUtility {
07: Object add(Object lhs, Object rhs);
08:
09: Object subtract(Object lhs, Object rhs);
10:
11: Object multiply(Object lhs, Object rhs);
12:
13: Object divide(Object lhs, Object rhs);
14:
15: Object negate(Object rhs);
16:
17: int compare(Object lhs, Object rhs);
18: }
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