org.sindice.siren.index

Class IntervalConstrainedNodesEnum

java.lang.Object

org.sindice.siren.index.DocsNodesAndPositionsEnum

org.sindice.siren.index.ConstrainedNodesEnum

org.sindice.siren.index.IntervalConstrainedNodesEnum

All Implemented Interfaces:

DocsAndNodesIterator, PositionsIterator

public class IntervalConstrainedNodesEnum
extends ConstrainedNodesEnum

Implementation of ConstrainedNodesEnum to apply a level constraint and a stack of interval constraints over the retrieved node labels.

This ConstrainedNodesEnum applies a stack of interval constraints. A stack of interval constraints is composed of a list of pairs (level, interval constraint), each pair indicates one interval constraint to apply on specific level of the node labels.

See Also:

NodeUtils#isConstraintSatisfied(IntsRef, int[], int[][])

Field Summary

Fields inherited from class org.sindice.siren.index.ConstrainedNodesEnum

docsEnum

Fields inherited from interface org.sindice.siren.index.DocsAndNodesIterator

NO_MORE_DOC, NO_MORE_NOD

Fields inherited from interface org.sindice.siren.index.PositionsIterator

NO_MORE_POS

Constructor Summary

Constructors

Constructor and Description
IntervalConstrainedNodesEnum(DocsNodesAndPositionsEnum docsEnum, int level, int[] levelIndex, int[][] constraints)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	nextNode() Move to the next node path in the current document.

Methods inherited from class org.sindice.siren.index.ConstrainedNodesEnum

doc, nextDocument, nextPosition, node, nodeFreqInDoc, pos, skipTo, termFreqInNode

Methods inherited from class org.sindice.siren.index.DocsNodesAndPositionsEnum

attributes

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

IntervalConstrainedNodesEnum

public IntervalConstrainedNodesEnum(DocsNodesAndPositionsEnum docsEnum,
                            int level,
                            int[] levelIndex,
                            int[][] constraints)

Method Detail

nextNode

public boolean nextNode()
                 throws IOException

Description copied from interface: DocsAndNodesIterator

Move to the next node path in the current document.

Should not be called until DocsAndNodesIterator.nextDocument() or DocsAndNodesIterator.skipTo(int) are called for the first time.

Specified by:

nextNode in interface DocsAndNodesIterator

Specified by:

nextNode in class ConstrainedNodesEnum

Returns:

false if there is no more node for the current document or if DocsAndNodesIterator.nextDocument() or DocsAndNodesIterator.skipTo(int) were not called yet.

Throws:

IOException