ist.palcom.hgraph
Class HgraphNode

java.lang.Object
  extended by ist.palcom.hgraph.HgraphNode
All Implemented Interfaces:
IHgraphNode
Direct Known Subclasses:
ConnectionHgraphProxy, DeviceWindowHgraphProxy, MirrorNode, NodeHgraphProxy, ServiceWindowHgraphProxy

public class HgraphNode
extends java.lang.Object
implements IHgraphNode

The default implementation of H-graph Nodes as described by the IHgraphNode interface


Field Summary
 
Fields inherited from interface ist.palcom.hgraph.IHgraphNode
CHILD_NAME_CLASH, CIRCULARITY_CLASH, COMMAND_OR_NODE_MISSING, ERROR, HANDLER_MISSING, INVOKATOR_MISSING, LISTENER_MISSING, NODE_NOT_CHILD, PATH_MISSING, SIBLING_ALREADY_EXISTS, SIBLING_NONEXISTENT, SIBLING_REFERENCE_ALREADY_EXISTS, SIBLING_REFERENCE_NONEXISTENT, STATUS_OK, VALUE_ALREADY_EXISTS, VALUE_NOT_PRESENT
 
Constructor Summary
HgraphNode()
          Constructs an anonymous HgraphNode.
HgraphNode(java.lang.String name)
          Constructs a named HgraphNode
 
Method Summary
 int addNodeChild(IHgraphNode node, Path callerPath)
          Adds a child to the node's private list of children.
 java.util.Iterator getChildIterator()
           
 IHgraphNode getChildNamed(java.lang.String name)
           
 FuncFunc getFuncFunc()
           
 java.lang.String getNodeName()
           
 IHgraphNode getNodeParent()
           
 int getNumberOfChildren()
           
 Path getPath()
           
 SiblingFunc getSiblingFunc()
           
 ValueFunc getValueFunc()
           
 boolean hasChildNamed(java.lang.String name)
          Checks whether the node has a child with a given name
 boolean isAncestorOf(IHgraphNode node)
          Checks whether this node is an ancestor of the parameter node.
 int removeNodeChild(java.lang.String name, Path callerPath)
          Removes a child based on its name.
 int setNodeName(java.lang.String name, Path callerPath)
          Sets the name of the node.
 int setNodeParent(IHgraphNode newParent, Path callerPath)
          Sets the parent of the HgraphNode.
 java.lang.String toXML()
           
 java.lang.String toXMLFull()
           
 java.lang.String toXMLFullRecursively()
           
 java.lang.String toXMLRecursively()
           
 void updatePath()
          Updates the path of the H-Graph node along with its offspring recursively.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

HgraphNode

public HgraphNode()
Constructs an anonymous HgraphNode. It uses Object.toString() as name and prefixes it with "ANONYMOUS:"


HgraphNode

public HgraphNode(java.lang.String name)
Constructs a named HgraphNode

Parameters:
name - The name of the node
Method Detail

getNodeParent

public IHgraphNode getNodeParent()
Specified by:
getNodeParent in interface IHgraphNode
Returns:
The parent of the node. null if the parent is root

getSiblingFunc

public SiblingFunc getSiblingFunc()
Specified by:
getSiblingFunc in interface IHgraphNode
Returns:
The SiblingFunc Sibling functionality object for the given node.

getValueFunc

public ValueFunc getValueFunc()
Specified by:
getValueFunc in interface IHgraphNode
Returns:
The ValueFunc Value functionality object for the given node.

getFuncFunc

public FuncFunc getFuncFunc()
Specified by:
getFuncFunc in interface IHgraphNode
Returns:
The FuncFunc functional functionality (ie. handlers, invokators and listeners) object for the given node.

getNodeName

public java.lang.String getNodeName()
Specified by:
getNodeName in interface IHgraphNode
Returns:
The name of the node.

setNodeName

public int setNodeName(java.lang.String name,
                       Path callerPath)
Description copied from interface: IHgraphNode
Sets the name of the node. If a sibling already has the name, an error control message is returned

Specified by:
setNodeName in interface IHgraphNode
Parameters:
name - The new name
Returns:
IHgraphNode.STATUS_OK if the change succeeded. IHgraphNode.CHILD_NAME_CLASH if a sibling with the given name already exists.

updatePath

public void updatePath()
Description copied from interface: IHgraphNode
Updates the path of the H-Graph node along with its offspring recursively. The path is updated when the node name and the node parent is sat.

Specified by:
updatePath in interface IHgraphNode

getPath

public Path getPath()
Specified by:
getPath in interface IHgraphNode
Returns:
the Path object pertaining to the path of the node

setNodeParent

public int setNodeParent(IHgraphNode newParent,
                         Path callerPath)
Description copied from interface: IHgraphNode
Sets the parent of the HgraphNode. This triggers a recalculation of the path of the node and its offspring

Specified by:
setNodeParent in interface IHgraphNode
Parameters:
newParent - the new parent
Returns:
IHgraphNode.STATUS_OK if the operation succeeds. IHgraphNode.CIRCULARITY_CLASH if the operation causes a circularity.

hasChildNamed

public boolean hasChildNamed(java.lang.String name)
Description copied from interface: IHgraphNode
Checks whether the node has a child with a given name

Specified by:
hasChildNamed in interface IHgraphNode
Parameters:
name - The name to check
Returns:
True iff the node has an actual child with the given name. False if not.

addNodeChild

public int addNodeChild(IHgraphNode node,
                        Path callerPath)
Description copied from interface: IHgraphNode
Adds a child to the node's private list of children. Ensures that names amongst children are unique

Specified by:
addNodeChild in interface IHgraphNode
Parameters:
node - The new child to be added
Returns:
IHgraphNode.STATUS_OK if the change succeeded. IHgraphNode.CHILD_NAME_CLASH if a sibling with the given name already exists.

isAncestorOf

public boolean isAncestorOf(IHgraphNode node)
Description copied from interface: IHgraphNode
Checks whether this node is an ancestor of the parameter node. It does so with a depth-first sharch of its offspring (children etc.)

Specified by:
isAncestorOf in interface IHgraphNode
Returns:
true if this node is an ancestor of the parameter node. false if not.

removeNodeChild

public int removeNodeChild(java.lang.String name,
                           Path callerPath)
Description copied from interface: IHgraphNode
Removes a child based on its name.

Specified by:
removeNodeChild in interface IHgraphNode
Parameters:
name - The name of the child to be removed
Returns:
IHgraphNode.STATUS_OK if the operation succeeds

getChildNamed

public IHgraphNode getChildNamed(java.lang.String name)

toXML

public java.lang.String toXML()
Specified by:
toXML in interface IHgraphNode
Returns:
A simple xml'ified String of the node (type, name, path, children)

toXMLFull

public java.lang.String toXMLFull()
Specified by:
toXMLFull in interface IHgraphNode
Returns:
A complete xml'ified String of the node (same as simple + handlers, invokators, listeners, values)

toXMLRecursively

public java.lang.String toXMLRecursively()
Specified by:
toXMLRecursively in interface IHgraphNode
Returns:
A simple recursive xml'ified String of the node (type, name, path, children)

toXMLFullRecursively

public java.lang.String toXMLFullRecursively()
Specified by:
toXMLFullRecursively in interface IHgraphNode
Returns:
A complete recursive xml'ified String of the node (same as simple + handlers, invokators, listeners, values) HEAVY!!!

getChildIterator

public java.util.Iterator getChildIterator()
Specified by:
getChildIterator in interface IHgraphNode
Returns:
An Iterator over the children of the node

getNumberOfChildren

public int getNumberOfChildren()