org.eclipse.incquery.runtime.base.itc.igraph

Class IBiDirectionalWrapper<V>

java.lang.Object

org.eclipse.incquery.runtime.base.itc.igraph.IBiDirectionalWrapper<V>

Type Parameters:

V - the type parameter of the nodes in the graph data source

All Implemented Interfaces:

java.io.Serializable, IBiDirectionalGraphDataSource<V>, IGraphDataSource<V>, IGraphObserver<V>

public class IBiDirectionalWrapper<V>
extends java.lang.Object
implements IBiDirectionalGraphDataSource<V>, IGraphObserver<V>

This class can be used to wrap an IGraphDataSource into an IBiDirectionalGraphDataSource. This class provides support for the retrieval of source nodes for a given target which is not supported by standard IGraphDataSource implementations.

Author:

Tamas Szabo

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
IBiDirectionalWrapper(IGraphDataSource<V> gds)

Method Summary

Modifier and Type	Method and Description
void	attachObserver(IGraphObserver<V> go) Attach a new graph observer.
void	detachObserver(IGraphObserver<V> go) Detach an existing observer.
void	edgeDeleted(V source, V target) Used to notify when an edge is deleted from the graph.
void	edgeInserted(V source, V target) Used to notify when an edge is inserted into the graph.
java.util.Set<V>	getAllNodes() Get all nodes of the graph.
java.util.List<V>	getSourceNodes(V target) Returns the source nodes of those edges that end in target.
java.util.List<V>	getTargetNodes(V source) Get those nodes that are the target of an edge starting with source.
void	nodeDeleted(V n) Used to notify when a node is deleted from the graph.
void	nodeInserted(V n) Used to notify when a node is inserted into the graph.
java.lang.String	toString()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

IBiDirectionalWrapper

public IBiDirectionalWrapper(IGraphDataSource<V> gds)

Method Detail

attachObserver

public void attachObserver(IGraphObserver<V> go)

Description copied from interface: IGraphDataSource

Attach a new graph observer. Note that the order of attaching the observers may be important (some observers will be notified earlier than others).

Specified by:

attachObserver in interface IGraphDataSource<V>

Parameters:

go - the graph observer

detachObserver

public void detachObserver(IGraphObserver<V> go)

Description copied from interface: IGraphDataSource

Detach an existing observer.

Specified by:

detachObserver in interface IGraphDataSource<V>

Parameters:

go - the graph observer

getAllNodes

public java.util.Set<V> getAllNodes()

Description copied from interface: IGraphDataSource

Get all nodes of the graph.

Specified by:

getAllNodes in interface IGraphDataSource<V>

Returns:

the set of all nodes

getTargetNodes

public java.util.List<V> getTargetNodes(V source)

Description copied from interface: IGraphDataSource

Get those nodes that are the target of an edge starting with source. List is returned as multiple edges may be present.

Specified by:

getTargetNodes in interface IGraphDataSource<V>

Parameters:

source - the source node

Returns:

the list of target nodes or null if no targets can be found

getSourceNodes

public java.util.List<V> getSourceNodes(V target)

Description copied from interface: IBiDirectionalGraphDataSource

Returns the source nodes of those edges that end in target. The nodes are returned as a List as multiple edges can be present between two arbitrary nodes. If no such node can be found than the method should return null.

Specified by:

getSourceNodes in interface IBiDirectionalGraphDataSource<V>

Parameters:

target - the target node

Returns:

the list of source nodes or null if no sources can be found

edgeInserted

public void edgeInserted(V source,
                         V target)

Description copied from interface: IGraphObserver

Used to notify when an edge is inserted into the graph.

Specified by:

edgeInserted in interface IGraphObserver<V>

Parameters:

source - the source of the edge

target - the target of the edge

edgeDeleted

public void edgeDeleted(V source,
                        V target)

Description copied from interface: IGraphObserver

Used to notify when an edge is deleted from the graph.

Specified by:

edgeDeleted in interface IGraphObserver<V>

Parameters:

source - the source of the edge

target - the target of the edge

nodeInserted

public void nodeInserted(V n)

Description copied from interface: IGraphObserver

Used to notify when a node is inserted into the graph.

Specified by:

nodeInserted in interface IGraphObserver<V>

Parameters:

n - the node

nodeDeleted

public void nodeDeleted(V n)

Description copied from interface: IGraphObserver

Used to notify when a node is deleted from the graph.

Specified by:

nodeDeleted in interface IGraphObserver<V>

Parameters:

n - the node

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object