org.whaka.data.shuffle

Interface RowCollector

All Known Implementing Classes:

AbstractRowCollector

public interface RowCollector

Each instance of a row collector able to store a state of a numerous 'rows', represented by int arrays. Row collector might be used by various index calculators to store intermediate state while calculating all the rows.

Method Summary

Modifier and Type	Method and Description
boolean	addRowIfValid(int[] row) This method returns true if specified row is valid and added to the collection, or false otherwise.
java.util.List<int[]>	getRows() Returns all the collected rows.
boolean	isValidRow(int[] row) If this method returns true for a specific row - then immediate call of the addRowIfValid(int[]) for the same row should also return true (if no other rows were added inbetween method calls).

Method Detail

isValidRow

boolean isValidRow(int[] row)

If this method returns true for a specific row - then immediate call of the addRowIfValid(int[]) for the same row should also return true (if no other rows were added inbetween method calls).

addRowIfValid

boolean addRowIfValid(int[] row)

This method returns true if specified row is valid and added to the collection, or false otherwise.

If isValidRow(int[]) returns true for a specific row, then immediate call to this method should also be successful for the same row (if no other rows were added inbetween method calls).

getRows

java.util.List<int[]> getRows()

Returns all the collected rows. All rows for which addRowIfValid(int[]) returned true should be present in the result collection.