com.pervasive.datarush.sequences

Interface ElementComparator

public interface ElementComparator

An index-based comparator for a TokenSequence. An ElementComparator always exists in the context of a TokenSequence; indexes refer to this sequence.

Field Summary

Fields

Modifier and Type	Field and Description
static int	EQUALS A value indicating the left value was equal to the right value
static int	GREATER_THAN A value indicating the left value was greater than the right value
static int	LESS_THAN A value indicating the left value was less than the right value

Method Summary

Methods

Modifier and Type	Method and Description
int	compareElements(int lhsIndex, int rhsIndex) Compares two sequence elements, specified by index.

Field Detail

LESS_THAN

static final int LESS_THAN

A value indicating the left value was less than the right value

See Also:

Constant Field Values

EQUALS

static final int EQUALS

A value indicating the left value was equal to the right value

See Also:

Constant Field Values

GREATER_THAN

static final int GREATER_THAN

A value indicating the left value was greater than the right value

See Also:

Constant Field Values

Method Detail

compareElements

int compareElements(int lhsIndex,
                  int rhsIndex)

Compares two sequence elements, specified by index.

Parameters:

lhsIndex - the index of the left hand element in the comparison

rhsIndex - the index of the right hand element in the comparison

Returns:

0 if the values are equal, 1 if the left elements value is greater, -1 if the left elements value is lesser. A null value is greater than any other non-null; two null values compare as equal.