Class ConnectionValidator

java.lang.Object

com.codename1.graph.ConnectionValidator

public class ConnectionValidator
extends Object

Decides whether an edge may be made. Extend it for rules of your own and call super.canConnect to keep these.

By default an edge is refused when it connects a node to itself, repeats an edge that exists, leaves an input port or enters an output port, joins two ports whose types are both set and differ, or takes a port past its GraphPort.getMaxConnections. Cycles are allowed unless setAllowCycles(false) is called.

Constructor Summary

Constructors

Constructor	Description
ConnectionValidator()

Method Summary

Modifier and Type	Method	Description
boolean	canConnect(GraphModel model, GraphNode source, GraphPort sourcePort, GraphNode target, GraphPort targetPort)	True when the edge may be made.
boolean	isAllowCycles()	True, the default, when an edge may close a cycle.
boolean	isAllowSelfLoops()	False, the default, when a node may not connect to itself.
void	setAllowCycles(boolean allowCycles)	Refuses edges that would close a cycle when false.
void	setAllowSelfLoops(boolean allowSelfLoops)	Allows a node to connect to itself.

Methods inherited from class Object

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

Constructor Details

ConnectionValidator

public ConnectionValidator()

Method Details

isAllowCycles

public boolean isAllowCycles()

True, the default, when an edge may close a cycle.

setAllowCycles

public void setAllowCycles(boolean allowCycles)

Refuses edges that would close a cycle when false.

isAllowSelfLoops

public boolean isAllowSelfLoops()

False, the default, when a node may not connect to itself.

setAllowSelfLoops

public void setAllowSelfLoops(boolean allowSelfLoops)

Allows a node to connect to itself.

canConnect

public boolean canConnect(GraphModel model,
 GraphNode source,
 GraphPort sourcePort,
 GraphNode target,
 GraphPort targetPort)

True when the edge may be made.