Package org.geotools.graph.structure.opt

Class OptGraphable

Object

OptGraphable

All Implemented Interfaces:

Serializable, Graphable

Direct Known Subclasses:

OptDirectedEdge, OptDirectedNode, OptEdge, OptNode

public abstract class OptGraphable
extends Object
implements Graphable, Serializable

Root of class hierarchy for optimized implementation of graph components. The optimizations reduce the space taken up by graph components:

• Counter implemented as byte
• No underlying object reference.

Objects in the optimized hierarchy implement the Serializable interface.

Author:

Justin Deoliveira, Refractions Research Inc, jdeolive@refractions.net

See Also:

• Graphable
• Serialized Form

Constructor Summary

Constructors

Constructor	Description
OptGraphable()	Constructs a new optimized graphable object.

Method Summary

Modifier and Type	Method	Description
int	getCount()	Returns the value of the counter for the component.
int	getID()	Returns 0.
Object	getObject()	Returns null.
boolean	isVisited()	Determines if the component has been marked as visited.
void	setCount(int count)	To minimize space, the counter is stored as a byte.
void	setID(int id)	Does nothing.
void	setObject(Object obj)	Does nothing.
void	setVisited(boolean visited)	Marks the component as being visited/unvisited.

Methods inherited from class Object

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

Methods inherited from interface Graphable

getRelated

Constructor Details

OptGraphable

public OptGraphable()

Constructs a new optimized graphable object. Visited flag it set to false and counter set to -1.

Method Details

setID

public void setID(int id)

Does nothing.

Specified by:

setID in interface Graphable

Parameters:

id - New identifying integer.

See Also:

• Graphable.setID(int)

getID

public int getID()

Returns 0.

Specified by:

getID in interface Graphable

Returns:

Identifying integer.

See Also:

• Graphable.getID()

setVisited

public void setVisited(boolean visited)

Description copied from interface: Graphable

Marks the component as being visited/unvisited. The visited flag serves as a binary switch for the component which can be used for graph queries, graph traversals, or user defined purposes.

Specified by:

setVisited in interface Graphable

Parameters:

visited - True if visited(on), false if unvisited(off).

See Also:

• Graphable.setVisited(boolean)

isVisited

public boolean isVisited()

Description copied from interface: Graphable

Determines if the component has been marked as visited. The visited flag serves as a binary switch for the component which can be used for graph queries, graph traversals, or user defined purposes.

Specified by:

isVisited in interface Graphable

Returns:

True if visited(on), false if unvisited(off).

See Also:

• Graphable.isVisited()

setCount

public void setCount(int count)

To minimize space, the counter is stored as a byte. Therefore the counter can take on values from -128 to 127.

Specified by:

setCount in interface Graphable

Parameters:

count - The new value of the counter for the component.

See Also:

• Graphable.setCount(int)

getCount

public int getCount()

Description copied from interface: Graphable

Returns the value of the counter for the component. Graph components have a counter associated with them to be used for graph queries, graph traversals, or user defined purposes.

Specified by:

getCount in interface Graphable

Returns:

int The value of the counter for the component.

See Also:

• Graphable.getCount()

setObject

public void setObject(Object obj)

Does nothing.

Specified by:

setObject in interface Graphable

Parameters:

obj - The entity being modelled by the graph component.

See Also:

• Graphable.setObject(Object)

getObject

public Object getObject()

Returns null.

Specified by:

getObject in interface Graphable

Returns:

Underlying object reference, the entity being modelled by graph component.

See Also:

• Graphable.getObject()