org.jpox.store.expression
Interface ExpressionLogicSetAdapter

All Known Subinterfaces:

DatastoreAdapter, RDBMSAdapter

All Known Implementing Classes:

AbstractDatastoreAdapter, DatabaseAdapter

public interface ExpressionLogicSetAdapter

Interface that allows performing algebra operations over sets

Version:

$Revision: 1.1 $

Method Summary

java.lang.String

cartersianProduct(LogicSetExpression Y) Generates a expression that represents the cartesian product of two sets: X and Y.

Method Detail

cartersianProduct

java.lang.String cartersianProduct(LogicSetExpression Y)

Generates a expression that represents the cartesian product of two sets: X and Y. Actually, X is not generated to the expression.

Parameters:

Y - right hand set

Returns:

the cartesion product expression. if the cartesian product expression is "X x Y", the returned expression is " x Y". Note that the left hand set was not introduced to the expression