org.neo4j.kernel.impl.util
Class RelIdArray

java.lang.Object
  org.neo4j.kernel.impl.util.RelIdArray

Direct Known Subclasses:

RelIdArray.EmptyRelIdArray, RelIdArrayWithLoops

public class RelIdArray
extends Object

Nested Class Summary

static class	RelIdArray.DirectionWrapper
static class	RelIdArray.EmptyRelIdArray
static class	RelIdArray.IdBlock
static class	RelIdArray.RelIdIteratorImpl

Field Summary

static RelIdArray	EMPTY
static RelIdArray.IdBlock	EMPTY_BLOCK

Constructor Summary

protected	RelIdArray(RelIdArray from)
	RelIdArray(String type)
protected	RelIdArray(String type, RelIdArray.IdBlock out, RelIdArray.IdBlock in)

Method Summary

void	add(long id, RelIdArray.DirectionWrapper direction)
RelIdArray	addAll(RelIdArray source)
protected void	append(RelIdArray source, RelIdArray.DirectionWrapper direction)
boolean	couldBeNeedingUpdate() Optimization in the lazy loading of relationships for a node.
RelIdArray	downgradeIfPossible()
static RelIdArray	empty(String type)
static RelIdArray	from(RelIdArray src, RelIdArray add, Collection<Long> remove)
protected RelIdArray.IdBlock	getLastLoopBlock()
String	getType()
boolean	isEmpty()
RelIdIterator	iterator(RelIdArray.DirectionWrapper direction)
RelIdArray	newSimilarInstance()
protected void	setLastLoopBlock(RelIdArray.IdBlock block)
RelIdArray	shrink()
RelIdArray	upgradeIfNeeded(RelIdArray capabilitiesToMatch)
static RelIdArray.DirectionWrapper	wrap(Direction direction)

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY

public static RelIdArray EMPTY

EMPTY_BLOCK

public static final RelIdArray.IdBlock EMPTY_BLOCK

Constructor Detail

RelIdArray

public RelIdArray(String type)

RelIdArray

protected RelIdArray(RelIdArray from)

RelIdArray

protected RelIdArray(String type,
                     RelIdArray.IdBlock out,
                     RelIdArray.IdBlock in)

Method Detail

empty

public static RelIdArray empty(String type)

getType

public String getType()

add

public void add(long id,
                RelIdArray.DirectionWrapper direction)

addAll

public RelIdArray addAll(RelIdArray source)

getLastLoopBlock

protected RelIdArray.IdBlock getLastLoopBlock()

shrink

public RelIdArray shrink()

setLastLoopBlock

protected void setLastLoopBlock(RelIdArray.IdBlock block)

upgradeIfNeeded

public RelIdArray upgradeIfNeeded(RelIdArray capabilitiesToMatch)

downgradeIfPossible

public RelIdArray downgradeIfPossible()

append

protected void append(RelIdArray source,
                      RelIdArray.DirectionWrapper direction)

isEmpty

public boolean isEmpty()

iterator

public RelIdIterator iterator(RelIdArray.DirectionWrapper direction)

newSimilarInstance

public RelIdArray newSimilarInstance()

wrap

public static RelIdArray.DirectionWrapper wrap(Direction direction)

from

public static RelIdArray from(RelIdArray src,
                              RelIdArray add,
                              Collection<Long> remove)

couldBeNeedingUpdate

public boolean couldBeNeedingUpdate()

Optimization in the lazy loading of relationships for a node. RelIdIterator.updateSource(RelIdArray) is only called if this returns true, i.e if a RelIdArray.EmptyRelIdArray or RelIdArray.IdBlock might have gotten upgraded to handle f.ex loops or high id ranges so that the RelIdIterator gets updated accordingly.