org.apache.jackrabbit.core.state
Class NodeState

java.lang.Object
  org.apache.jackrabbit.core.state.ItemState
      org.apache.jackrabbit.core.state.NodeState

Direct Known Subclasses:

VirtualNodeState

public class NodeState
extends ItemState

NodeState represents the state of a Node.

Field Summary

Fields inherited from class org.apache.jackrabbit.core.state.ItemState

overlayedState, status, STATUS_EXISTING, STATUS_EXISTING_MODIFIED, STATUS_EXISTING_REMOVED, STATUS_NEW, STATUS_STALE_DESTROYED, STATUS_UNDEFINED

Constructor Summary

NodeState(NodeId id, Name nodeTypeName, NodeId parentId, int initialStatus, boolean isTransient)
Constructs a new node state that is not connected.

NodeState(NodeState overlayedState, int initialStatus, boolean isTransient)
Constructs a new node state that is initially connected to an overlayed state.

Method Summary

ChildNodeEntry	addChildNodeEntry(Name nodeName, NodeId id) Adds a new ChildNodeEntry.
void	addPropertyName(Name propName) Adds a property name entry.
boolean	addShare(NodeId parentId) Add a parent to the shared set.
long	calculateMemoryFootprint() Returns an estimate of the memory size of this node state.
boolean	containsShare(NodeId parentId) Return a flag whether the given parent id appears in the shared set.
void	copy(ItemState state, boolean syncModCount) Copy state information from another state into this state
List<ChildNodeEntry>	getAddedChildNodeEntries() Returns a list of child node entries that do not exist in the overlayed node state but have been added to this node state.
Set<Name>	getAddedPropertyNames() Returns a set of Names denoting those properties that do not exist in the overlayed node state but have been added to this node state.
Set<NodeId>	getAddedShares() Returns a set of shares that were added.
List<ChildNodeEntry>	getChildNodeEntries() Returns a list of ChildNodeEntry objects denoting the child nodes of this node.
List<ChildNodeEntry>	getChildNodeEntries(Name nodeName) Returns a list of ChildNodeEntrys with the specified name.
ChildNodeEntry	getChildNodeEntry(Name nodeName, int index) Returns the ChildNodeEntry with the specified name and index or null if there's no matching entry.
ChildNodeEntry	getChildNodeEntry(NodeId id) Returns the ChildNodeEntry with the specified NodeId or null if there's no matching entry.
ItemId	getId() Returns the identifier of this item.
Set<Name>	getMixinTypeNames() Returns the names of this node's mixin types.
NodeId	getNodeId() Returns the identifier of this node.
Name	getNodeTypeName() Returns the name of this node's node type.
NodeId	getParentId() Returns the NodeId of the parent NodeState or null if either this item state represents the root node or this item state is 'free floating', i.e. not attached to the repository's hierarchy.
Set<Name>	getPropertyNames() Returns the names of this node's properties as a set of QNames objects.
List<ChildNodeEntry>	getRemovedChildNodeEntries() Returns a list of child node entries, that exist in the overlayed node state but have been removed from this node state.
Set<Name>	getRemovedPropertyNames() Returns a set of Names denoting those properties that exist in the overlayed node state but have been removed from this node state.
Set<NodeId>	getRemovedShares() Returns a set of shares that were removed.
List<ChildNodeEntry>	getRenamedChildNodeEntries() Returns a list of child node entries that exist both in this node state and in the overlayed node state but have been renamed.
List<ChildNodeEntry>	getReorderedChildNodeEntries() Returns a list of child node entries that exist both in this node state and in the overlayed node state but have been reordered.
Set<NodeId>	getSharedSet() Return the shared set as an unmodifiable collection.
boolean	hasChildNodeEntries() Determines if there are any child node entries.
boolean	hasChildNodeEntry(Name name) Determines if there is a ChildNodeEntry with the specified name.
boolean	hasChildNodeEntry(Name name, int index) Determines if there is a ChildNodeEntry with the specified name and index.
boolean	hasChildNodeEntry(NodeId id) Determines if there is a ChildNodeEntry with the specified NodeId.
boolean	hasPropertyName(Name propName) Determines if there is a property entry with the specified Name.
boolean	isNode() Determines if this item state represents a node.
boolean	isShareable() Return a flag indicating whether this state is shareable, i.e. whether there is at least one member inside its shared set.
protected void	notifyNodeAdded(ChildNodeEntry added) Notify the listeners that a child node entry has been added
protected void	notifyNodeRemoved(ChildNodeEntry removed) Notify the listeners that a child node entry has been removed
protected void	notifyNodesReplaced() Notify the listeners that the child node entries have been replaced
void	removeAllChildNodeEntries() Removes all ChildNodeEntrys.
void	removeAllPropertyNames() Removes all property name entries.
boolean	removeChildNodeEntry(Name nodeName, int index) Removes a ChildNodeEntry.
boolean	removeChildNodeEntry(NodeId id) Removes a ChildNodeEntry.
boolean	removePropertyName(Name propName) Removes a property name entry.
int	removeShare(NodeId parentId) Remove a parent from the shared set.
boolean	renameChildNodeEntry(Name oldName, int index, Name newName) Renames a ChildNodeEntry by removing the old entry and appending the new entry to the end of the list.
boolean	renameChildNodeEntry(NodeId id, Name newName) Renames a ChildNodeEntry by removing the old entry and appending the new entry to the end of the list.
boolean	replaceChildNodeEntry(NodeId oldId, Name newName, NodeId newId) Replaces the ChildNodeEntry identified by oldId with a new entry.
void	setChildNodeEntries(List<ChildNodeEntry> nodeEntries) Sets the list of ChildNodeEntry objects denoting the child nodes of this node.
void	setContainer(ItemStateListener listener) Set the parent container that will receive notifications about changes to this state.
void	setMixinTypeNames(Set<Name> names) Sets the names of this node's mixin types.
void	setNodeTypeName(Name nodeTypeName) Set the node type name.
void	setParentId(NodeId parentId) Sets the id of this node's parent.
void	setPropertyNames(Set<Name> propNames) Sets the set of Name objects denoting the properties of this node.
void	setSharedSet(Set<NodeId> set) Set the shared set of this state to the shared set of another state.

Methods inherited from class org.apache.jackrabbit.core.state.ItemState

connect, discard, disconnect, getContainer, getModCount, getOverlayedState, getStatus, hasOverlayedState, isConnected, isStale, isTransient, notifyStateCreated, notifyStateDestroyed, notifyStateDiscarded, notifyStateUpdated, reconnect, setModCount, setStatus

Methods inherited from class java.lang.Object

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

Constructor Detail

NodeState

public NodeState(NodeState overlayedState,
                 int initialStatus,
                 boolean isTransient)

Constructs a new node state that is initially connected to an overlayed state.

Parameters:

overlayedState - the backing node state being overlayed

initialStatus - the initial status of the node state object

isTransient - flag indicating whether this state is transient or not

NodeState

public NodeState(NodeId id,
                 Name nodeTypeName,
                 NodeId parentId,
                 int initialStatus,
                 boolean isTransient)

Constructs a new node state that is not connected.

Parameters:

id - id of this node

nodeTypeName - node type of this node

parentId - id of the parent node

initialStatus - the initial status of the node state object

isTransient - flag indicating whether this state is transient or not

Method Detail

copy

public void copy(ItemState state,
                 boolean syncModCount)

Copy state information from another state into this state

Specified by:

copy in class ItemState

Parameters:

state - source state information

syncModCount - if the modCount should be synchronized.

isNode

public final boolean isNode()

Determines if this item state represents a node.

Specified by:

isNode in class ItemState

Returns:

always true

getParentId

public NodeId getParentId()

Returns the NodeId of the parent NodeState or null if either this item state represents the root node or this item state is 'free floating', i.e. not attached to the repository's hierarchy.

Specified by:

getParentId in class ItemState

Returns:

the parent NodeState's Id

getId

public ItemId getId()

Returns the identifier of this item.

Specified by:

getId in class ItemState

Returns:

the id of this item.

getNodeId

public NodeId getNodeId()

Returns the identifier of this node.

Returns:

the id of this node.

setParentId

public void setParentId(NodeId parentId)

Sets the id of this node's parent.

Parameters:

parentId - the parent node's id or null if either this node state should represent the root node or this node state should be 'free floating', i.e. detached from the workspace's hierarchy.

getNodeTypeName

public Name getNodeTypeName()

Returns the name of this node's node type.

Returns:

the name of this node's node type.

getMixinTypeNames

public Set<Name> getMixinTypeNames()

Returns the names of this node's mixin types.

Returns:

a set of the names of this node's mixin types.

setMixinTypeNames

public void setMixinTypeNames(Set<Name> names)

Sets the names of this node's mixin types.

Parameters:

names - set of names of mixin types

hasChildNodeEntries

public boolean hasChildNodeEntries()

Determines if there are any child node entries.

Returns:

true if there are child node entries, false otherwise.

hasChildNodeEntry

public boolean hasChildNodeEntry(Name name)

Determines if there is a ChildNodeEntry with the specified name.

Parameters:

name - Name object specifying a node name

Returns:

true if there is a ChildNodeEntry with the specified name.

hasChildNodeEntry

public boolean hasChildNodeEntry(NodeId id)

Determines if there is a ChildNodeEntry with the specified NodeId.

Parameters:

id - the id of the child node

Returns:

true if there is a ChildNodeEntry with the specified name.

hasChildNodeEntry

public boolean hasChildNodeEntry(Name name,
                                 int index)

Determines if there is a ChildNodeEntry with the specified name and index.

Parameters:

name - Name object specifying a node name

index - 1-based index if there are same-name child node entries

Returns:

true if there is a ChildNodeEntry with the specified name and index.

hasPropertyName

public boolean hasPropertyName(Name propName)

Determines if there is a property entry with the specified Name.

Parameters:

propName - Name object specifying a property name

Returns:

true if there is a property entry with the specified Name.

getChildNodeEntry

public ChildNodeEntry getChildNodeEntry(Name nodeName,
                                        int index)

Returns the ChildNodeEntry with the specified name and index or null if there's no matching entry.

Parameters:

nodeName - Name object specifying a node name

index - 1-based index if there are same-name child node entries

Returns:

the ChildNodeEntry with the specified name and index or null if there's no matching entry.

getChildNodeEntry

public ChildNodeEntry getChildNodeEntry(NodeId id)

Returns the ChildNodeEntry with the specified NodeId or null if there's no matching entry.

Parameters:

id - the id of the child node

Returns:

the ChildNodeEntry with the specified NodeId or null if there's no matching entry.

See Also:

addChildNodeEntry(org.apache.jackrabbit.spi.Name, org.apache.jackrabbit.core.id.NodeId), removeChildNodeEntry(org.apache.jackrabbit.spi.Name, int)

getChildNodeEntries

public List<ChildNodeEntry> getChildNodeEntries()

Returns a list of ChildNodeEntry objects denoting the child nodes of this node.

Returns:

list of ChildNodeEntry objects

See Also:

addChildNodeEntry(org.apache.jackrabbit.spi.Name, org.apache.jackrabbit.core.id.NodeId), removeChildNodeEntry(org.apache.jackrabbit.spi.Name, int)

getChildNodeEntries

public List<ChildNodeEntry> getChildNodeEntries(Name nodeName)

Returns a list of ChildNodeEntrys with the specified name.

Parameters:

nodeName - name of the child node entries that should be returned

Returns:

list of ChildNodeEntry objects

See Also:

addChildNodeEntry(org.apache.jackrabbit.spi.Name, org.apache.jackrabbit.core.id.NodeId), removeChildNodeEntry(org.apache.jackrabbit.spi.Name, int)

addChildNodeEntry

public ChildNodeEntry addChildNodeEntry(Name nodeName,
                                        NodeId id)

Adds a new ChildNodeEntry.

Parameters:

nodeName - Name object specifying the name of the new entry.

id - the id the new entry is refering to.

Returns:

the newly added ChildNodeEntry

renameChildNodeEntry

public boolean renameChildNodeEntry(Name oldName,
                                    int index,
                                    Name newName)

Renames a ChildNodeEntry by removing the old entry and appending the new entry to the end of the list.

Parameters:

oldName - Name object specifying the entry's old name

index - 1-based index if there are same-name child node entries

newName - Name object specifying the entry's new name

Returns:

true if the entry was successfully renamed; otherwise false

renameChildNodeEntry

public boolean renameChildNodeEntry(NodeId id,
                                    Name newName)

Renames a ChildNodeEntry by removing the old entry and appending the new entry to the end of the list.

Parameters:

id - id the entry to be renamed is refering to.

newName - Name object specifying the entry's new name

Returns:

true if the entry was successfully renamed; otherwise false

replaceChildNodeEntry

public boolean replaceChildNodeEntry(NodeId oldId,
                                     Name newName,
                                     NodeId newId)

Replaces the ChildNodeEntry identified by oldId with a new entry. Note that the entry will overwrite the old entry at the same relative position within the child node entries list.

Parameters:

oldId - id the entry to be replaced is refering to.

newName - Name object specifying the entry's new name

newId - the id the new entry is refering to.

Returns:

true if the entry was successfully replaced; otherwise false

removeChildNodeEntry

public boolean removeChildNodeEntry(Name nodeName,
                                    int index)

Removes a ChildNodeEntry.

Parameters:

nodeName - ChildNodeEntry object specifying a node name

index - 1-based index if there are same-name child node entries

Returns:

true if the specified child node entry was found in the list of child node entries and could be removed.

removeChildNodeEntry

public boolean removeChildNodeEntry(NodeId id)

Removes a ChildNodeEntry.

Parameters:

id - the id of the entry to be removed

Returns:

true if the specified child node entry was found in the list of child node entries and could be removed.

removeAllChildNodeEntries

public void removeAllChildNodeEntries()

Removes all ChildNodeEntrys.

setChildNodeEntries

public void setChildNodeEntries(List<ChildNodeEntry> nodeEntries)

Sets the list of ChildNodeEntry objects denoting the child nodes of this node.

Parameters:

nodeEntries - list of ChildNodeEntrys

getPropertyNames

public Set<Name> getPropertyNames()

Returns the names of this node's properties as a set of QNames objects.

Returns:

set of QNames objects

See Also:

addPropertyName(org.apache.jackrabbit.spi.Name), removePropertyName(org.apache.jackrabbit.spi.Name)

addPropertyName

public void addPropertyName(Name propName)

Adds a property name entry.

Parameters:

propName - Name object specifying the property name

removePropertyName

public boolean removePropertyName(Name propName)

Removes a property name entry.

Parameters:

propName - Name object specifying the property name

Returns:

true if the specified property name was found in the list of property name entries and could be removed.

removeAllPropertyNames

public void removeAllPropertyNames()

Removes all property name entries.

setPropertyNames

public void setPropertyNames(Set<Name> propNames)

Sets the set of Name objects denoting the properties of this node.

Parameters:

propNames - set of Names.

setNodeTypeName

public void setNodeTypeName(Name nodeTypeName)

Set the node type name. Needed for deserialization and should therefore not change the internal status.

Parameters:

nodeTypeName - node type name

isShareable

public boolean isShareable()

Return a flag indicating whether this state is shareable, i.e. whether there is at least one member inside its shared set.

Returns:

true if this state is shareable.

addShare

public boolean addShare(NodeId parentId)

Add a parent to the shared set.

Parameters:

parentId - parent id to add to the shared set

Returns:

true if the parent was successfully added; false otherwise

containsShare

public boolean containsShare(NodeId parentId)

Return a flag whether the given parent id appears in the shared set.

Parameters:

parentId - parent id

Returns:

true if the parent id appears in the shared set; false otherwise.

getSharedSet

public Set<NodeId> getSharedSet()

Return the shared set as an unmodifiable collection.

Returns:

unmodifiable collection

setSharedSet

public void setSharedSet(Set<NodeId> set)

Set the shared set of this state to the shared set of another state. This state will get a deep copy of the shared set given.

Parameters:

set - shared set

removeShare

public int removeShare(NodeId parentId)

Remove a parent from the shared set. Returns the number of elements in the shared set. If this number is 0, the shared set is empty, i.e. there are no more parent items referencing this item and the state is free floating.

Parameters:

parentId - parent id to remove from the shared set

Returns:

the number of elements left in the shared set

getAddedPropertyNames

public Set<Name> getAddedPropertyNames()

Returns a set of Names denoting those properties that do not exist in the overlayed node state but have been added to this node state.

Returns:

set of Names denoting the properties that have been added.

getAddedChildNodeEntries

public List<ChildNodeEntry> getAddedChildNodeEntries()

Returns a list of child node entries that do not exist in the overlayed node state but have been added to this node state.

Returns:

list of added child node entries

getRemovedPropertyNames

public Set<Name> getRemovedPropertyNames()

Returns a set of Names denoting those properties that exist in the overlayed node state but have been removed from this node state.

Returns:

set of Names denoting the properties that have been removed.

getRemovedChildNodeEntries

public List<ChildNodeEntry> getRemovedChildNodeEntries()

Returns a list of child node entries, that exist in the overlayed node state but have been removed from this node state.

Returns:

list of removed child node entries

getRenamedChildNodeEntries

public List<ChildNodeEntry> getRenamedChildNodeEntries()

Returns a list of child node entries that exist both in this node state and in the overlayed node state but have been renamed.

Returns:

list of renamed child node entries

getReorderedChildNodeEntries

public List<ChildNodeEntry> getReorderedChildNodeEntries()

Returns a list of child node entries that exist both in this node state and in the overlayed node state but have been reordered.

The list may include only the minimal set of nodes that have been reordered. That is, even though a certain number of nodes have changed their absolute position the list may include less that this number of nodes.

Example:
Initial state:

  + node1
  + node2
  + node3
 

After reorder:

  + node2
  + node3
  + node1
 

All nodes have changed their absolute position. The returned list however may only return that node1 has been reordered (from the first position to the end).

Returns:

list of reordered child node enties.

getAddedShares

public Set<NodeId> getAddedShares()

Returns a set of shares that were added.

Returns:

the set of shares that were added. Set of NodeIds.

getRemovedShares

public Set<NodeId> getRemovedShares()

Returns a set of shares that were removed.

Returns:

the set of shares that were removed. Set of NodeIds.

setContainer

public void setContainer(ItemStateListener listener)

Set the parent container that will receive notifications about changes to this state.

If the listener passed is at the same time a NodeStateListener we remember it as well.

Overrides:

setContainer in class ItemState

Parameters:

listener - container to be informed on modifications

calculateMemoryFootprint

public long calculateMemoryFootprint()

Returns an estimate of the memory size of this node state. The return value actually highly overestimates the amount of required memory, but changing the estimates would likely cause OOMs in many downstream deployments that have set their cache sizes based on experience with these erroneous size estimates. So we don't change the formula used by this method.

Specified by:

calculateMemoryFootprint in class ItemState

Returns:

the approximate memory consumption of this state.

notifyNodeAdded

protected void notifyNodeAdded(ChildNodeEntry added)

Notify the listeners that a child node entry has been added

Parameters:

added - the entry that was added

notifyNodesReplaced

protected void notifyNodesReplaced()

Notify the listeners that the child node entries have been replaced

notifyNodeRemoved

protected void notifyNodeRemoved(ChildNodeEntry removed)

Notify the listeners that a child node entry has been removed

Parameters:

removed - the entry that was removed