org.jboss.dna.jcr.cache
Class EmptyChildren

java.lang.Object
  org.jboss.dna.jcr.cache.EmptyChildren

All Implemented Interfaces:

Iterable<ChildNode>, Children

@Immutable
public final class EmptyChildren
extends Object
implements Children

An immutable implementation of Children.

Constructor Summary

EmptyChildren(UUID parentUuid)

Method Summary

ChildNode	getChild(Path.Segment segment) Get the child given the path segment.
ChildNode	getChild(UUID uuid) Get the child with the given UUID.
Iterator<ChildNode>	getChildren(Name name) Get the same-name-sibling children that all share the supplied name, in order of increasing SNS index.
int	getCountOfSameNameSiblingsWithName(Name name) Get the number of same-name-siblings that all share the supplied name.
UUID	getParentUuid() The UUID of the parent node.
Iterator<ChildNode>	iterator()
int	size() Get the number of children.
String	toString()
ChangedChildren	with(Name newChildName, UUID newChildUuid, PathFactory pathFactory) Create another Children object that is equivalent to this node but with the supplied child added.
ChangedChildren	without(UUID childUuid, PathFactory pathFactory) Create another Children object that is equivalent to this node but without the supplied child.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

EmptyChildren

public EmptyChildren(UUID parentUuid)

Method Detail

size

public int size()

Get the number of children.

Specified by:

size in interface Children

Returns:

the number of children

See Also:

Children.size()

iterator

public Iterator<ChildNode> iterator()

Specified by:

iterator in interface Iterable<ChildNode>

See Also:

Iterable.iterator()

getParentUuid

public UUID getParentUuid()

The UUID of the parent node.

Specified by:

getParentUuid in interface Children

Returns:

the parent node's UUID

See Also:

Children.getParentUuid()

getChild

public ChildNode getChild(UUID uuid)

Get the child with the given UUID.

Specified by:

getChild in interface Children

Parameters:

uuid - the UUID of the child node

Returns:

the child node, or null if there is no child with the supplied UUID

See Also:

Children.getChild(java.util.UUID)

getChild

public ChildNode getChild(Path.Segment segment)

Get the child given the path segment.

Specified by:

getChild in interface Children

Parameters:

segment - the path segment for the child, which includes the name and one-based same-name-sibling index; may not be null

Returns:

the information for the child node, or null if no such child existed

See Also:

Children.getChild(org.jboss.dna.graph.property.Path.Segment)

getChildren

public Iterator<ChildNode> getChildren(Name name)

Get the same-name-sibling children that all share the supplied name, in order of increasing SNS index.

Specified by:

getChildren in interface Children

Parameters:

name - the name for the children; may not be null

Returns:

the children with the supplied name; never null

See Also:

Children.getChildren(org.jboss.dna.graph.property.Name)

getCountOfSameNameSiblingsWithName

public int getCountOfSameNameSiblingsWithName(Name name)

Get the number of same-name-siblings that all share the supplied name.

Specified by:

getCountOfSameNameSiblingsWithName in interface Children

Parameters:

name - the name for the children; may not be null

Returns:

the number of same-name-siblings with the supplied name

See Also:

Children.getCountOfSameNameSiblingsWithName(org.jboss.dna.graph.property.Name)

with

public ChangedChildren with(Name newChildName,
                            UUID newChildUuid,
                            PathFactory pathFactory)

Create another Children object that is equivalent to this node but with the supplied child added.

Parameters:

newChildName - the name of the new child; may not be null

newChildUuid - the UUID of the new child; may not be null

pathFactory - the factory that can be used to create Path and/or Path.Segment instances.

Returns:

the new Children object; never null

See Also:

InternalChildren.with(org.jboss.dna.graph.property.Name, java.util.UUID, org.jboss.dna.graph.property.PathFactory)

without

public ChangedChildren without(UUID childUuid,
                               PathFactory pathFactory)

Create another Children object that is equivalent to this node but without the supplied child.

Parameters:

childUuid - the UUID of the child to be removed; may not be null

pathFactory - the factory that can be used to create Path and/or Path.Segment instances.

Returns:

the new Children object; never null

See Also:

InternalChildren.without(java.util.UUID, org.jboss.dna.graph.property.PathFactory)

toString

public String toString()

Overrides:

toString in class Object

See Also:

Object.toString()