com.pervasive.datarush.sequences

Interface TokenValuedIterator

All Superinterfaces:

TokenTyped, TokenValued

All Known Subinterfaces:

BinaryValuedIterator, BooleanValuedIterator, CharValuedIterator, CloseableRecordValuedIterator, DateValuedIterator, DoubleValuedIterator, FloatValuedIterator, IntValuedIterator, LongValuedIterator, NumericValuedIterator, ObjectValuedIterator<T>, RecordValuedIterator, ScalarValuedIterator, SeekableRecordValuedIterator, SeekableScalarValuedIterator, SeekableTokenValuedIterator, StringValuedIterator, TimestampValuedIterator, TimeValuedIterator

All Known Implementing Classes:

DatasetIterator, RecordMap.RecordMapIterator

public interface TokenValuedIterator
extends TokenValued

Iterator over token values. Provides a visitation pattern that is efficient for both sparse and dense data. When stepping, only those values not equal to "zero" will be returned.

Method Summary

Modifier and Type	Method and Description
int	getAbsoluteIndex() Returns the dense value index for the current value.
void	resetIteration() Resets the iteration to the beginning.
boolean	stepNext() Advances to the next value not equal to "zero".

Methods inherited from interface com.pervasive.datarush.tokens.TokenValued

getType, isNull

Method Detail

stepNext

boolean stepNext()

Advances to the next value not equal to "zero".

Returns:

true if position is beyond the end.

Throws:

IteratorEndOfDataException - If an attempt is made to call after it has already returned false

getAbsoluteIndex

int getAbsoluteIndex()

Returns the dense value index for the current value. Dense value index is the index of the value in the "dense" representation; If this represents an iterator over fields in a record, RecordTokenType.get(denseIndex) will return the associated field.

NOTE: Iteration order is unspecified on this interface. Some implementations guarantee sort order whereas others do not. Please refer to the documentation on the factory method from which this iterator was constructed for ordering information.

Returns:

The dense index.

resetIteration

void resetIteration()

Resets the iteration to the beginning.