TurtleDB
A mini distributed database system
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Protected Member Functions | |
Tuple | internalNext () |
Definition at line 46 of file Product.java.
Tuple ca.uqac.dim.turtledb.Product.ProductStreamIterator.internalNext | ( | ) | [protected, virtual] |
Method that must be implemented by every non-abstract relation; it returns the next tuple of the enumeration, if any. Methods next and hasNext use the return value of internalNext and additionally remove any duplicate tuples from the output enumeration. Hence a call to next may result in multiple calls to the relation's internalNext, if the tuples returned are already part of the result (this is especially true of Projections.
null
if no such tuple exists Implements ca.uqac.dim.turtledb.RelationStreamIterator.
Definition at line 49 of file Product.java.