org.jgraph.graph
Class DefaultGraphModel

java.lang.Object
  javax.swing.undo.UndoableEditSupport
      org.jgraph.graph.DefaultGraphModel

All Implemented Interfaces:

GraphModel, Serializable

public class DefaultGraphModel

extends UndoableEditSupport

implements Serializable, GraphModel

The default implementation of a graph model.

See Also:

Serialized Form

Nested Class Summary

static class	DefaultGraphModel.EmptyIterator
class	DefaultGraphModel.GraphModelEdit An implementation of GraphModelChange that can be added to the model event.
class	DefaultGraphModel.GraphModelLayerEdit An implementation of GraphViewChange.

Field Summary

protected boolean	asksAllowsChildren Indicates whether isLeaf is based on a node's allowsChildren value.
protected AttributeMap	attributes The model's own attributes as a map.
protected Iterator	emptyIterator Default instance of an empty iterator.
protected EventListenerList	listenerList The list of listeners that listen to the model.
protected boolean	removeEmptyGroups Whether or not to remove group cells from the model when all of their children are removed
protected List	roots Set that contains all root cells of this model.
protected Set	transAddedCells Stores nested transaction added cells
protected Map	transEditAttrs Stores nested transaction transport attribute maps
protected ConnectionSet	transEditCS Stores nested transaction connection sets
protected ParentMap	transEditPM Stores nested transaction parent maps
protected Set	transRemovedCells Stores nested transaction removed cells
protected int	updateLevel Counter for the depth of nested transactions.

Fields inherited from class javax.swing.undo.UndoableEditSupport

compoundEdit, listeners, realSource

Constructor Summary

DefaultGraphModel()
Constructs a model that is not an attribute store.

DefaultGraphModel(List roots, AttributeMap attributes)
Constructs a model that is not an attribute store.

DefaultGraphModel(List roots, AttributeMap attributes, ConnectionSet cs)
Constructs a model using the specified information to construct the cells, attributes and connection data.

Method Summary

boolean	acceptsSource(Object edge, Object port) Returns true if port is a valid source for edge.
boolean	acceptsTarget(Object edge, Object port) Returns true if port is a valid target for edge.
void	addGraphModelListener(GraphModelListener l) Adds a listener for the GraphModelEvent posted after the graph changes.
void	beginUpdate() Indicates the start of one level of an executable change
void	cellsChanged(Object[] cells) Invoke this method after you've changed how the cells are to be represented in the graph.
static Object	cloneCell(GraphModel model, Object cell) Returns a deep clone of the specified cell, including all children.
static Object[]	cloneCell(GraphModel model, Object[] cells) Returns a deep clone of the specified cells, including all children.
protected Object	cloneCell(Object cellObj) Creates a shallow copy of the cell including a copy of the user object.
Map	cloneCells(Object[] cells) Returns a map of (cell, clone)-pairs for all cells.
protected Object	cloneUserObject(Object userObject) Clones the user object.
protected void	connect(Object edge, Object port, boolean isSource, boolean insert) Connects or disconnects the edge and port in this model based on remove.
boolean	contains(Object node) Returns true if node or one of its ancestors is in the model.
static boolean	containsEdgeBetween(GraphModel model, Object v1, Object v2) Returns true if the given vertices are conntected by a single edge in this document.
protected DefaultGraphModel.GraphModelEdit	createEdit(Object[] inserted, Object[] removed, Map attributes, ConnectionSet cs, ParentMap pm, UndoableEdit[] edits)
protected DefaultGraphModel.GraphModelLayerEdit	createLayerEdit(Object[] cells, int layer)
protected DefaultGraphModel.GraphModelEdit	createRemoveEdit(Object[] cells) Returns an edit that represents a remove.
Iterator	edges(Object port) Returns an iterator of the edges connected to port.
void	edit(Map attributes, ConnectionSet cs, ParentMap pm, UndoableEdit[] edits) Shortcut to the new edit method which allows inserts and removes to go along with an edit.
void	edit(Object[] inserted, Object[] removed, Map attributes, ConnectionSet cs, ParentMap pm, UndoableEdit[] edits) Applies attributes and the connection changes to the model.
void	endUpdate() Indicates the end of the current level of an executable change
void	execute(ExecutableChange change) Executes the specified executable change on this graph model
protected void	fireGraphChanged(Object source, GraphModelEvent.GraphModelChange edit)
static Object[]	getAll(GraphModel model) Returns all cells of the model in an array.
Map	getAttributes() Returns the graph model's attribute.
AttributeMap	getAttributes(Object node) Returns a Map that represents the attributes for the specified cell.
Object	getChild(Object parent, int index) Returns the child of parent at index index in the parent's child array.
int	getChildCount(Object parent) Returns the number of children of parent .
ConnectionSet	getConnectionSet() A shortcut method to create a connection set that represents the connections in this model.
static List	getDescendants(GraphModel model, Object[] cells) Flattens the given array of root cells by adding the roots and their descandants.
static Set	getEdges(GraphModel model, Object[] cells) Returns the set of all connected edges to cells or their descendants.
static Object[]	getEdges(GraphModel model, Object cell, boolean incoming) Returns the incoming or outgoing edges for cell.
static Object[]	getEdgesBetween(GraphModel model, Object cell1, Object cell2, boolean directed) Returns the edges between two specified ports or two specified vertices.
GraphModelListener[]	getGraphModelListeners() Return an array of all GraphModelListeners that were added to this model.
static Object[]	getIncomingEdges(GraphModel model, Object cell) Returns the incoming edges for cell.
int	getIndexOfChild(Object parent, Object child) Returns the index of child in parent.
int	getIndexOfRoot(Object root) Returns the index of root in the model.
static Object	getOpposite(GraphModel model, Object edge, Object cell)
static Object[]	getOutgoingEdges(GraphModel model, Object cell) Returns the outgoing edges for cell.
Object	getParent(Object child) Returns the parent of child in the model.
Object	getRootAt(int index) Returns the root at index index in the model.
int	getRootCount() Returns the number of roots in the model.
List	getRoots()
static Object[]	getRoots(GraphModel model) Returns the roots of the specified model as an array.
static Object[]	getRoots(GraphModel model, Object[] cells) Returns the roots in cells by checking if their parent is null.
static Collection	getRootsAsCollection(GraphModel model) Returns the roots of the specified model as a collection.
Object	getSource(Object edge) Returns the source of edge.
static Object	getSourceVertex(GraphModel model, Object edge) Returns the source vertex of the edge by calling getParent on getSource on the specified model.
Object	getTarget(Object edge) Returns the target of edge.
static Object	getTargetVertex(GraphModel model, Object edge) Returns the target vertex of the edge by calling getParent on getTarget on the specified model.
static Object[]	getTopmostCells(GraphModel model, Object[] cells)
int	getUpdateLevel()
static Object	getUserObject(Object cell) Deprecated. Use GraphModel.getValue(Object) instead.
Object	getValue(Object cell) Returns the user object for the specified cell.
protected Map	handleAttributes(Map attributes) Applies attributes to the cells specified as keys.
protected void	handleConnection(ConnectionSet.Connection c, boolean establish) Inserts the specified connection into the model.
protected ConnectionSet	handleConnectionSet(ConnectionSet cs) Applies connectionSet to the model.
protected Object[]	handleInsert(Object[] cells) Inserts cells into the model.
protected ParentMap	handleParentMap(ParentMap parentMap) Applies cells to the model.
protected Object[]	handleRemove(Object[] cells) Removes cells from the model.
static boolean	hasAncestorIn(GraphModel model, Set parents, Object child) Returns true if the specified child has an ancestor in parents.
void	insert(Object[] roots, Map attributes, ConnectionSet cs, ParentMap pm, UndoableEdit[] edits) Inserts the roots and connections into the model.
boolean	isEdge(Object edge) Returns true if edge is a valid edge.
static boolean	isGroup(GraphModel model, Object cell) Checks whether the cell has at least one child which is not a port.
boolean	isLeaf(Object node) Returns whether the specified node is a leaf node.
boolean	isPort(Object port) Returns true if port is a valid port, possibly supporting edge connection.
boolean	isRemoveEmptyGroups()
static boolean	isVertex(GraphModel model, Object vertex) Returns true if vertex is a valid vertex.
static Object[]	order(GraphModel model, Object[] cells) Orders cells so that they reflect the model order.
void	remove(Object[] roots) Removes cells from the model.
void	removeGraphModelListener(GraphModelListener l) Removes a listener previously added with addGraphModelListener() .
protected void	setParent(Object child, Object parent) Sets the parent of the specified cell.
void	setRemoveEmptyGroups(boolean removeEmptyGroups)
static void	setSourcePort(GraphModel model, Object edge, Object port) Helper methods that connects the source of edge to port in model.
static void	setTargetPort(GraphModel model, Object edge, Object port) Helper methods that connects the source of edge to port in model.
void	toBack(Object[] cells) Sends cells to back.
void	toFront(Object[] cells) Brings cells to front.
protected void	updateTransaction(Object[] inserted, Object[] removed, Map attributes, ConnectionSet cs, ParentMap pm) Updates the current state of the various transaction data
Object	valueForCellChanged(Object cell, Object newValue) Applies the new value to the specified cell.

Methods inherited from class javax.swing.undo.UndoableEditSupport

_postEdit, addUndoableEditListener, createCompoundEdit, getUndoableEditListeners, postEdit, removeUndoableEditListener, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jgraph.graph.GraphModel

addUndoableEditListener, removeUndoableEditListener

Field Detail

listenerList

protected transient EventListenerList listenerList

The list of listeners that listen to the model.

emptyIterator

protected transient Iterator emptyIterator

Default instance of an empty iterator.

roots

protected List roots

Set that contains all root cells of this model.

asksAllowsChildren

protected boolean asksAllowsChildren

Indicates whether isLeaf is based on a node's allowsChildren value.

removeEmptyGroups

protected boolean removeEmptyGroups

Whether or not to remove group cells from the model when all of their children are removed

attributes

protected AttributeMap attributes

The model's own attributes as a map. Defaults to an empty Hashtable.

updateLevel

protected transient int updateLevel

Counter for the depth of nested transactions. Each call to beginUpdate increments this counter and each call to endUpdate decrements it. When the counter reaches 0, the transaction is closed and applied to the model.

transAddedCells

protected transient Set transAddedCells

Stores nested transaction added cells

transRemovedCells

protected transient Set transRemovedCells

Stores nested transaction removed cells

transEditAttrs

protected transient Map transEditAttrs

Stores nested transaction transport attribute maps

transEditCS

protected transient ConnectionSet transEditCS

Stores nested transaction connection sets

transEditPM

protected transient ParentMap transEditPM

Stores nested transaction parent maps

Constructor Detail

DefaultGraphModel

public DefaultGraphModel()

Constructs a model that is not an attribute store.

DefaultGraphModel

public DefaultGraphModel(List roots,
                         AttributeMap attributes)

Constructs a model that is not an attribute store.

DefaultGraphModel

public DefaultGraphModel(List roots,
                         AttributeMap attributes,
                         ConnectionSet cs)

Constructs a model using the specified information to construct the cells, attributes and connection data.

Method Detail

getRoots

public List getRoots()

getRootCount

public int getRootCount()

Returns the number of roots in the model. Returns 0 if the model is empty.

Specified by:

getRootCount in interface GraphModel

Returns:

the number of roots in the model

getRootAt

public Object getRootAt(int index)

Returns the root at index index in the model. This should not return null if index is a valid index for the model (that is index >= 0 && index < getRootCount()).

Specified by:

getRootAt in interface GraphModel

Returns:

the root of at index index

getIndexOfRoot

public int getIndexOfRoot(Object root)

Returns the index of root in the model. If root is null, returns -1.

Specified by:

getIndexOfRoot in interface GraphModel

Parameters:

root - a root in the model, obtained from this data source

Returns:

the index of the root in the model, or -1 if the parent is null

contains

public boolean contains(Object node)

Returns true if node or one of its ancestors is in the model.

Specified by:

contains in interface GraphModel

Returns:

true if node is in the model

getAttributes

public AttributeMap getAttributes(Object node)

Returns a Map that represents the attributes for the specified cell. This attributes have precedence over each view's attributes, regardless of isAttributeStore.

Specified by:

getAttributes in interface GraphModel

Returns:

attributes of node as a Map

getValue

public Object getValue(Object cell)

Description copied from interface: GraphModel

Returns the user object for the specified cell.

Specified by:

getValue in interface GraphModel

Returns:

Returns the user object of the given cell. This implementation checks if the cell is a default mutable tree node and returns it's user object.

getAttributes

public Map getAttributes()

Returns the graph model's attribute. Shortcut to getAttributes(null).

Returns:

attributes of node as a Map

getSource

public Object getSource(Object edge)

Returns the source of edge. edge must be an object previously obtained from this data source.

Specified by:

getSource in interface GraphModel

Returns:

Object that represents the source of edge

getTarget

public Object getTarget(Object edge)

Returns the target of edge. edge must be an object previously obtained from this data source.

Specified by:

getTarget in interface GraphModel

Returns:

Object that represents the target of edge

acceptsSource

public boolean acceptsSource(Object edge,
                             Object port)

Returns true if port is a valid source for edge. edge and port must be objects previously obtained from this data source.

Specified by:

acceptsSource in interface GraphModel

Returns:

true if port is a valid source for edge.

acceptsTarget

public boolean acceptsTarget(Object edge,
                             Object port)

Returns true if port is a valid target for edge. edge and port must be objects previously obtained from this data source.

Specified by:

acceptsTarget in interface GraphModel

Returns:

true if port is a valid target for edge.

edges

public Iterator edges(Object port)

Returns an iterator of the edges connected to port. port must be a object previously obtained from this data source. This method never returns null.

Specified by:

edges in interface GraphModel

Parameters:

port - a port in the graph, obtained from this data source

Returns:

Iterator that represents the connected edges

isEdge

public boolean isEdge(Object edge)

Returns true if edge is a valid edge.

Specified by:

isEdge in interface GraphModel

Returns:

true if edge is a valid edge.

isPort

public boolean isPort(Object port)

Returns true if port is a valid port, possibly supporting edge connection.

Specified by:

isPort in interface GraphModel

Returns:

true if port is a valid port.

getConnectionSet

public ConnectionSet getConnectionSet()

A shortcut method to create a connection set that represents the connections in this model. Useful for encoding to avoid writing redundant connection data stored in the cells.

cloneCells

public Map cloneCells(Object[] cells)

Returns a map of (cell, clone)-pairs for all cells. In the new array, all references are replaced with references to the cloned cells (ie parent or anchor). This method does only include children which are in cells. Use JGraph.getDescendants to get a complete list of all children.

Specified by:

cloneCells in interface GraphModel

setParent

protected void setParent(Object child,
                         Object parent)

Sets the parent of the specified cell.

cloneCell

protected Object cloneCell(Object cellObj)

Creates a shallow copy of the cell including a copy of the user object. Subclassers can override the cloneUserObject to provide a custom user object cloning mechanism.

cloneUserObject

protected Object cloneUserObject(Object userObject)

Clones the user object. Helper method that is invoked from cloneCells. You must use cloneCells (or cloneCell for single cells) to get a deep copy of a clone. Subclassers must override this and valueForCellChanged to implement custom user objects. This implementation returns object.

getParent

public Object getParent(Object child)

Returns the parent of child in the model. child must be a node previously obtained from this data source. This returns null if child is a root in the model.

Specified by:

getParent in interface GraphModel

Parameters:

child - a node in the graph, obtained from this data source

Returns:

the parent of child

getIndexOfChild

public int getIndexOfChild(Object parent,
                           Object child)

Returns the index of child in parent. If either the parent or child is null, returns -1.

Specified by:

getIndexOfChild in interface GraphModel

Parameters:

parent - a note in the tree, obtained from this data source

child - the node we are interested in

Returns:

the index of the child in the parent, or -1 if either the parent or the child is null

getChild

public Object getChild(Object parent,
                       int index)

Returns the child of parent at index index in the parent's child array. parent must be a node previously obtained from this data source. This should not return null if index is a valid index for parent (that is index >= 0 && index < getChildCount( parent )).

Specified by:

getChild in interface GraphModel

Parameters:

parent - a node in the tree, obtained from this data source

Returns:

the child of parent at index index

getChildCount

public int getChildCount(Object parent)

Returns the number of children of parent . Returns 0 if the node is a leaf or if it has no children. parent must be a node previously obtained from this data source.

Specified by:

getChildCount in interface GraphModel

Parameters:

parent - a node in the tree, obtained from this data source

Returns:

the number of children of the node parent

isLeaf

public boolean isLeaf(Object node)

Returns whether the specified node is a leaf node. The way the test is performed depends on the.

Specified by:

isLeaf in interface GraphModel

Parameters:

node - the node to check

Returns:

true if the node is a leaf node

insert

public void insert(Object[] roots,
                   Map attributes,
                   ConnectionSet cs,
                   ParentMap pm,
                   UndoableEdit[] edits)

Inserts the roots and connections into the model. Notifies the model- and undo listeners of the change. The passed-in edits are executed if they implement the GraphModelEvent.ExecutableGraphChange interface in ascending array-order, after execution of the model change. Note: The passed-in propertyMap may contain PortView s which must be turned into Point s when stored in the model.

Specified by:

insert in interface GraphModel

remove

public void remove(Object[] roots)

Removes cells from the model. Notifies the model- and undo listeners of the change.

Specified by:

remove in interface GraphModel

edit

public void edit(Map attributes,
                 ConnectionSet cs,
                 ParentMap pm,
                 UndoableEdit[] edits)

Shortcut to the new edit method which allows inserts and removes to go along with an edit.

Specified by:

edit in interface GraphModel

edit

public void edit(Object[] inserted,
                 Object[] removed,
                 Map attributes,
                 ConnectionSet cs,
                 ParentMap pm,
                 UndoableEdit[] edits)

Applies attributes and the connection changes to the model. The initial edits that triggered the call are considered to be part of this transaction. The passed-in edits are executed if they implement the GraphModelEvent.ExecutableGraphChange interface in ascending array-order, after execution of the model change. Notifies the model- and undo listeners of the change. Note: If only edits is non-null, the edits are directly passed to the UndoableEditListeners. Note: The passed-in propertyMap may contains PortViews which must be turned into Points when stored in the model.

execute

public void execute(ExecutableChange change)

Description copied from interface: GraphModel

Executes the specified executable change on this graph model

Specified by:

execute in interface GraphModel

Parameters:

change - the change to be executed

getUpdateLevel

public int getUpdateLevel()

beginUpdate

public void beginUpdate()

Description copied from interface: GraphModel

Indicates the start of one level of an executable change

Specified by:

beginUpdate in interface GraphModel

endUpdate

public void endUpdate()

Description copied from interface: GraphModel

Indicates the end of the current level of an executable change

Specified by:

endUpdate in interface GraphModel

updateTransaction

protected void updateTransaction(Object[] inserted,
                                 Object[] removed,
                                 Map attributes,
                                 ConnectionSet cs,
                                 ParentMap pm)

Updates the current state of the various transaction data

Parameters:

inserted - inserted cell to be added to the transaction

removed - removed cells to be removed from the transaction

attributes - nested attribute maps to apply to the transaction

cs - connection sets to add to the transaction

pm - parent maps to add to the transaction

toBack

public void toBack(Object[] cells)

Sends cells to back.

Specified by:

toBack in interface GraphModel

toFront

public void toFront(Object[] cells)

Brings cells to front.

Specified by:

toFront in interface GraphModel

createLayerEdit

protected DefaultGraphModel.GraphModelLayerEdit createLayerEdit(Object[] cells,
                                                                int layer)

createRemoveEdit

protected DefaultGraphModel.GraphModelEdit createRemoveEdit(Object[] cells)

Returns an edit that represents a remove.

createEdit

protected DefaultGraphModel.GraphModelEdit createEdit(Object[] inserted,
                                                      Object[] removed,
                                                      Map attributes,
                                                      ConnectionSet cs,
                                                      ParentMap pm,
                                                      UndoableEdit[] edits)

handleInsert

protected Object[] handleInsert(Object[] cells)

Inserts cells into the model. Returns the cells that were inserted (including descendants).

handleRemove

protected Object[] handleRemove(Object[] cells)

Removes cells from the model. Returns the cells that were removed as roots.

handleParentMap

protected ParentMap handleParentMap(ParentMap parentMap)

Applies cells to the model. Returns a parent map that may be used to undo this change.

handleAttributes

protected Map handleAttributes(Map attributes)

Applies attributes to the cells specified as keys. Returns the attributes to undo the change.

valueForCellChanged

public Object valueForCellChanged(Object cell,
                                  Object newValue)

Applies the new value to the specified cell. Unfortunately for cloning the user object you must still override the attribute map and provide a custom cloneUserObject method. This is because the cloning of a cell is local to the cell, which in turn has a reference to its attribute map.

Specified by:

valueForCellChanged in interface GraphModel

Parameters:

cell -

newValue -

Returns:

the old value for the cell, if any

handleConnectionSet

protected ConnectionSet handleConnectionSet(ConnectionSet cs)

Applies connectionSet to the model. Returns a connection set that may be used to undo this change.

handleConnection

protected void handleConnection(ConnectionSet.Connection c,
                                boolean establish)

Inserts the specified connection into the model.

connect

protected void connect(Object edge,
                       Object port,
                       boolean isSource,
                       boolean insert)

Connects or disconnects the edge and port in this model based on remove. Subclassers should override this to update connectivity datastructures.

addGraphModelListener

public void addGraphModelListener(GraphModelListener l)

Adds a listener for the GraphModelEvent posted after the graph changes.

Specified by:

addGraphModelListener in interface GraphModel

Parameters:

l - the listener to add

See Also:

removeGraphModelListener(org.jgraph.event.GraphModelListener)

removeGraphModelListener

public void removeGraphModelListener(GraphModelListener l)

Removes a listener previously added with addGraphModelListener() .

Specified by:

removeGraphModelListener in interface GraphModel

Parameters:

l - the listener to remove

See Also:

addGraphModelListener(org.jgraph.event.GraphModelListener)

cellsChanged

public void cellsChanged(Object[] cells)

Invoke this method after you've changed how the cells are to be represented in the graph.

fireGraphChanged

protected void fireGraphChanged(Object source,
                                GraphModelEvent.GraphModelChange edit)

getGraphModelListeners

public GraphModelListener[] getGraphModelListeners()

Return an array of all GraphModelListeners that were added to this model.

cloneCell

public static Object cloneCell(GraphModel model,
                               Object cell)

Returns a deep clone of the specified cell, including all children.

cloneCell

public static Object[] cloneCell(GraphModel model,
                                 Object[] cells)

Returns a deep clone of the specified cells, including all children.

setSourcePort

public static void setSourcePort(GraphModel model,
                                 Object edge,
                                 Object port)

Helper methods that connects the source of edge to port in model.

setTargetPort

public static void setTargetPort(GraphModel model,
                                 Object edge,
                                 Object port)

Helper methods that connects the source of edge to port in model.

getSourceVertex

public static Object getSourceVertex(GraphModel model,
                                     Object edge)

Returns the source vertex of the edge by calling getParent on getSource on the specified model.

getTargetVertex

public static Object getTargetVertex(GraphModel model,
                                     Object edge)

Returns the target vertex of the edge by calling getParent on getTarget on the specified model.

getUserObject

public static Object getUserObject(Object cell)

Deprecated. Use GraphModel.getValue(Object) instead.

Returns:

Returns the user object of the given cell. This implementation checks if the cell is a default mutable tree node and returns it's user object.

isGroup

public static boolean isGroup(GraphModel model,
                              Object cell)

Checks whether the cell has at least one child which is not a port. This implementation operates on the model, not taking into account visibility of cells. It returns true for groups regardless of their folded state.

Parameters:

cell - the cell to check for being a group

Returns:

Returns true if the cell contains at least one cell which is not a port

getAll

public static Object[] getAll(GraphModel model)

Returns all cells of the model in an array.

Returns:

Returns all cells in the model including all descandants.

See Also:

getDescendants(GraphModel, Object[])

getRoots

public static Object[] getRoots(GraphModel model)

Returns the roots of the specified model as an array. This implementation uses the GraphModel interface in the general case, but if the model is a DefaultGraphModel the performance can be improved to linear time.

getRootsAsCollection

public static Collection getRootsAsCollection(GraphModel model)

Returns the roots of the specified model as a collection. This implementation uses the GraphModel interface in the general case, but if the model is a DefaultGraphModel the performance can be improved to linear time.

getRoots

public static Object[] getRoots(GraphModel model,
                                Object[] cells)

Returns the roots in cells by checking if their parent is null. This implementation only uses the GraphModel interface. This method never returns null.

getTopmostCells

public static Object[] getTopmostCells(GraphModel model,
                                       Object[] cells)

Returns:

Returns the roots of cells, eg. an array that contains no cell having an ancestor in cells.

hasAncestorIn

public static boolean hasAncestorIn(GraphModel model,
                                    Set parents,
                                    Object child)

Returns true if the specified child has an ancestor in parents.

getDescendants

public static List getDescendants(GraphModel model,
                                  Object[] cells)

Flattens the given array of root cells by adding the roots and their descandants. The resulting set contains all cells, which means it contains branches and leafs. Note: This is an iterative implementation. No recursion used.
Note: This returns a linked list, for frequent read operations you should turn this into an array, or at least an array list.

order

public static Object[] order(GraphModel model,
                             Object[] cells)

Orders cells so that they reflect the model order.

getEdges

public static Set getEdges(GraphModel model,
                           Object[] cells)

Returns the set of all connected edges to cells or their descendants. The passed-in cells are never returned as part of the result set. This can be used on vertices, edges and ports.

getOpposite

public static Object getOpposite(GraphModel model,
                                 Object edge,
                                 Object cell)

Returns:

Returns the opposite port or vertex in edge.

containsEdgeBetween

public static boolean containsEdgeBetween(GraphModel model,
                                          Object v1,
                                          Object v2)

Returns true if the given vertices are conntected by a single edge in this document.

getEdgesBetween

public static Object[] getEdgesBetween(GraphModel model,
                                       Object cell1,
                                       Object cell2,
                                       boolean directed)

Returns the edges between two specified ports or two specified vertices. If directed is true then cell1 must be the source of the returned edges. This method never returns null. If there are no edges between the specified cells, then an array of length 0 is returned.

getOutgoingEdges

public static Object[] getOutgoingEdges(GraphModel model,
                                        Object cell)

Returns the outgoing edges for cell. Cell should be a port or a vertex.

getIncomingEdges

public static Object[] getIncomingEdges(GraphModel model,
                                        Object cell)

Returns the incoming edges for cell. Cell should be a port or a vertex.

getEdges

public static Object[] getEdges(GraphModel model,
                                Object cell,
                                boolean incoming)

Returns the incoming or outgoing edges for cell. Cell should be a port or a vertex.

isVertex

public static boolean isVertex(GraphModel model,
                               Object vertex)

Returns true if vertex is a valid vertex.

Returns:

true if vertex is a valid vertex.

isRemoveEmptyGroups

public boolean isRemoveEmptyGroups()

Returns:

the removeEmptyGroups

setRemoveEmptyGroups

public void setRemoveEmptyGroups(boolean removeEmptyGroups)

Parameters:

removeEmptyGroups - the removeEmptyGroups to set