Package com.alexmerz.graphviz.objects

Class Edge

java.lang.Object

com.alexmerz.graphviz.objects.Edge

public class Edge
extends Object

This class represents an Edge in a Graph. Each Edge has a source Node and a target Node. Both nodes may contain port information. The type attribute is currently a nice-to-have because only directed edges are only allowed in 'Digraphs', and undirected in 'Graphs'.

Constructor Summary

Constructors

Constructor	Description
Edge()	Creates an empty edge object
Edge(PortNode source, PortNode target, int type)	Creates an Edge

Method Summary

Modifier and Type	Method	Description
String	getAttribute(String key)	Returns the value of an edge attribute
Hashtable<String,String>	getAttributes()	Returns all attributes of this edge
PortNode	getSource()	Returns the source node of the edge
PortNode	getTarget()	Returns the target node of the edge
int	getType()	Returns the type of the edge.
void	setAttribute(String key, String value)	Sets the value of an attribute
void	setSource(PortNode source)	Sets the source node of the edge
void	setTarget(PortNode target)	Sets the target node of the edge
void	setType(int type)	Sets the type of the edge
String	toString()	Returns the String representation of the edge

Methods inherited from class java.lang.Object

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

Constructor Details

Edge

public Edge()

Creates an empty edge object

Edge

public Edge(PortNode source,
 PortNode target,
 int type)

Creates an Edge

Parameters:

source - the source Node

target - the target Node

type - the edge type

Method Details

getSource

public PortNode getSource()

Returns the source node of the edge

Returns:

the source node

setSource

public void setSource(PortNode source)

Sets the source node of the edge

Parameters:

source - the source node

getTarget

public PortNode getTarget()

Returns the target node of the edge

Returns:

the target node

setTarget

public void setTarget(PortNode target)

Sets the target node of the edge

Parameters:

target - the target Node

getType

public int getType()

Returns the type of the edge.

Returns:

the type of the edge

See Also:

• Graph.UNDIRECTED
• Graph.DIRECTED

setType

public void setType(int type)

Sets the type of the edge

Parameters:

type - the type of the edge

See Also:

• Graph.UNDIRECTED
• Graph.DIRECTED

toString

public String toString()

Returns the String representation of the edge

Overrides:

toString in class Object

Returns:

the string representation

getAttribute

public String getAttribute(String key)

Returns the value of an edge attribute

Parameters:

key - the name of the attribute

Returns:

the value of the attribute

setAttribute

public void setAttribute(String key,
 String value)

Sets the value of an attribute

Parameters:

key - the name of the attribute

value - the value of the attribute

getAttributes

public Hashtable<String,String> getAttributes()

Returns all attributes of this edge

Returns:

the attributes