@Override
public void slotChanged(ChunkEvent ce) {
IChunk iChunk = ce.getSource();
Object oldValue = ce.getOldSlotValue();
Object newValue = ce.getNewSlotValue();
if (LOGGER.isDebugEnabled())
LOGGER.debug(iChunk + "." + ce.getSlotName() + "=" + newValue + " (was " + oldValue + ")");
/*
* we can only do this if ISubsymbolicChunk is ISubsymbolicChunk4
*/
if (!(iChunk.getSubsymbolicChunk() instanceof ISubsymbolicChunk4)) {
if (LOGGER.isWarnEnabled())
LOGGER.warn(
"Can only adjust associative links if the chunk's subsymbolic is derived from ISubsymbolicChunk4");
return;
}
/*
* I chunk is the owner that references J
*/
ISubsymbolicChunk4 sscI = (ISubsymbolicChunk4) iChunk.getSubsymbolicChunk();
/*
* first the old chunk value..
*/
if (oldValue instanceof IChunk) {
IChunk jChunk = (IChunk) oldValue;
if (jChunk.getSubsymbolicChunk() instanceof ISubsymbolicChunk4) {
ISubsymbolicChunk4 sscJ = (ISubsymbolicChunk4) jChunk.getSubsymbolicChunk();
Link sJI = sscJ.getIAssociation(iChunk);
if (sJI != null) {
sJI.decrement();
if (sJI.getCount() == 0) {
if (LOGGER.isDebugEnabled())
LOGGER.debug("Removing link between " + iChunk + " and " + jChunk + " : " + sJI);
sscI.removeLink(sJI);
sscJ.removeLink(sJI);
} else if (LOGGER.isDebugEnabled())
LOGGER.debug(
"Multiple links established between "
+ iChunk
+ " and "
+ jChunk
+ " decrementing : "
+ sJI);
}
} else if (LOGGER.isWarnEnabled())
LOGGER.warn(
"old value " + jChunk + " doesn't have a ISubsymbolicChunk4, nothing to be done");
}
/*
* now for the new one
*/
if (newValue instanceof IChunk) {
IChunk jChunk = (IChunk) newValue;
if (jChunk.getSubsymbolicChunk() instanceof ISubsymbolicChunk4) {
ISubsymbolicChunk4 sscJ = (ISubsymbolicChunk4) jChunk.getSubsymbolicChunk();
Link sJI = sscJ.getIAssociation(iChunk);
/*
* is this a new linkage?
*/
if (sJI == null) {
sJI = new Link(jChunk, iChunk);
if (LOGGER.isDebugEnabled())
LOGGER.debug("Adding link between " + iChunk + " and " + jChunk + " : " + sJI);
sscI.addLink(sJI);
sscJ.addLink(sJI);
} else {
sJI.increment(); // not new, but we need to increment the link
if (LOGGER.isDebugEnabled())
LOGGER.debug(
"Link already established between "
+ iChunk
+ " and "
+ jChunk
+ " incrementing : "
+ sJI);
}
} else if (LOGGER.isWarnEnabled())
LOGGER.warn(
"new value " + jChunk + " doesn't have a ISubsymbolicChunk4, nothing to be done");
}
}
