i3.dragos.gm.core
Interface Edge

All Superinterfaces:

ExistenceCheckable, GraphEntity, MetaAttributable

All Known Implementing Classes:

EdgeProxy

public interface Edge
extends GraphEntity

The Edge interface represents a simple binary relation. Edges may be directed or not.

Author:

Boris Boehlen <boehlen@cs.rwth-aachen.de>, Thorsten Hermes <thermes@i3.informatik.rwth-aachen.de>

See Also:

Core Graph Model, Implementation Issues

Method Summary

EdgeClass	getEdgeClass() Returns the type of the edge.
GraphEntity	getSource() Returns the source graph element.
GraphEntity	getTarget() Returns the target graph element.
boolean	isDirected() Returns true if the edge is directed and false otherwise.
void	setSource(GraphEntity g) Sets the source graph element.
void	setTarget(GraphEntity g) Sets the target graph element.

Methods inherited from interface i3.dragos.gm.core.GraphEntity

equals, getAdjacentGraphEntities, getAdjacentRelations, getAdjacentRelations, getAllValidAttributeValues, getAttributeValue, getDataSourceURL, getEdges, getEdges, getGraphEntityClass, getInternalIdentifier, getParent, getRelationEnds, getRelationEnds, getRelationEnds, getWrappedGraphEntity, hashCode, isAttributeValid, isIncident, isIncident, putAttributeValue, setAttributeInvalid

Methods inherited from interface i3.dragos.gm.core.schema.MetaAttributable

getAllMetaAttributes, getMetaAttribute, isMetaAttributeKeyReserved, isMetaAttributeSet, setMetaAttribute, unsetMetaAttribute

Methods inherited from interface i3.dragos.gm.core.schema.ExistenceCheckable

checkExistence, checkExistenceOptional

Method Detail

getEdgeClass

EdgeClass getEdgeClass()
                       throws DragosException

Returns the type of the edge.

Actually, this method is just a correctly typed wrapper for calling GraphEntity.getGraphEntityClass().

Returns:

the edge class of the edge.

Throws:

DragosException - if something went wrong.

setSource

void setSource(GraphEntity g)
               throws EntityNotFoundException,
                      DragosException

Sets the source graph element.

Parameters:

g - the source graph element (may be null).

Throws:

EntityNotFoundException - if the source was not null and could not be found.

DragosException - if something went wrong.

getSource

GraphEntity getSource()
                      throws DragosException

Returns the source graph element.

Returns:

the source graph element.

Throws:

DragosException - if something went wrong.

setTarget

void setTarget(GraphEntity g)
               throws EntityNotFoundException,
                      DragosException

Sets the target graph element.

Parameters:

g - the target graph element (may be null).

Throws:

EntityNotFoundException - if the target was not null and could not be found.

DragosException - if something went wrong.

getTarget

GraphEntity getTarget()
                      throws DragosException

Returns the target graph element.

Returns:

the target graph element.

Throws:

DragosException - if something went wrong.

isDirected

boolean isDirected()
                   throws DragosException

Returns true if the edge is directed and false otherwise.

Returns:

true if the edge is directed and false otherwise.

Throws:

DragosException - if something went wrong.