at.dms.kjc.flatgraph
Class SSGEdge

java.lang.Object
  at.dms.kjc.flatgraph.SSGEdge

public class SSGEdge
extends Object

This class represents inter-SSG edges. Dynamic-rate edges between static-rate subgraphs (StaticStreamGraph). A there is only a single SSGEdge for a connection, shared by its upstream side and its downstream side. So, if upstream (resp. downstream) side sets upstreamNode (resp. downStreamNode) value, the downstream (resp. upstream) SSG will see it.

Author:

Mike Gordon

Method Summary

static SSGEdge	createSSGEdge(StaticStreamGraph fromSSG, StaticStreamGraph toSSG, int from, int to) Create a new SSGEdge, or return an existing one with the same parameters.
StaticStreamGraph	getDownstream() the downstream SSG of edge
int	getDownstreamNum() get the index into the input array for the downstream SSG
StaticStreamGraph	getUpstream() the upstream SSG of edge
int	getUpstreamNum() get the index into the output array of the upstream SSG

Methods inherited from class java.lang.Object

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

Method Detail

createSSGEdge

public static SSGEdge createSSGEdge(StaticStreamGraph fromSSG,
                                    StaticStreamGraph toSSG,
                                    int from,
                                    int to)

Create a new SSGEdge, or return an existing one with the same parameters.

Parameters:

fromSSG - upstream SSG

toSSG - dowmstream SSG

from - number of outgoing connection in upstream SSG

to - number of incoming connection in downstream SSG

Returns:

a SSGEdge.

getDownstreamNum

public int getDownstreamNum()

get the index into the input array for the downstream SSG

getUpstreamNum

public int getUpstreamNum()

get the index into the output array of the upstream SSG

getDownstream

public StaticStreamGraph getDownstream()

the downstream SSG of edge

getUpstream

public StaticStreamGraph getUpstream()

the upstream SSG of edge