Package com.espertech.esper.common.internal.collection

Class CombinationEnumeration

java.lang.Object
com.espertech.esper.common.internal.collection.CombinationEnumeration
All Implemented Interfaces:
Enumeration<Object[]>
public class CombinationEnumeration extends Object implements Enumeration<Object[]>
Provided a 2-dimensional array of values, provide all possible combinations: 
     For example, an array { {1}, {"A", "B"}, {"X", "Y"} } provides these combinations:
        1 A X
        1 A Y
        1 B X
        1 B Y
. Usage Note: Do not hold on to the returned object array as nextElement() returns the same array with changed values for each enumeration.

Each array element must be non-null and length 1 or more.

Does not detect duplicates in values.

Allows any number for the first dimension.

The algorithm adds 1 to the right and overflows until done.