@Override
public boolean init() {
if (oType != -1) return true;
super.init();
createIfNotExists();
// during init not yet all builder are available so inheritance is not
// yet possible
// This means that calls to getAllowedRelations do not consider
// inheritance during initializion of MMBase.
// This occurs e.g. in one of the Community-builders.
readCache(false);
EventManager.getInstance().addEventListener(this);
return true;
}
/*
* (non-Javadoc)
* @see org.mmbase.module.core.MMObjectBuilder#notify(org.mmbase.core.event.NodeEvent)
*/
@Override
public void notify(NodeEvent event) {
if (log.isDebugEnabled()) {
log.debug(
"Changed "
+ event.getMachine()
+ " "
+ event.getNodeNumber()
+ " "
+ event.getBuilderName()
+ " "
+ NodeEvent.newTypeToOldType(event.getType()));
}
if (tableName.equals(event.getBuilderName())) {
if (event.getType() == Event.TYPE_NEW) {
MMObjectNode typeRelNode = getNode(event.getNodeNumber());
if (typeRelNode != null) {
Set<MMObjectNode> newTypeRels = addCacheEntry(typeRelNode, true);
log.service("Added to typerelcache: " + newTypeRels);
} else {
log.warn("Could not found typerel node with number " + event.getNodeNumber());
}
} else {
// something else changed in a typerel node? reread the complete typeRelNodes Set
log.service(
"Received '" + event + "' which is about typrels. Now re-reading the entire cache");
readCache();
}
// also, clear all query-caches, because result may change by this. See MMB-348
for (Cache qc : CacheManager.getMap().values()) {
if (qc instanceof QueryResultCache) {
qc.clear();
}
}
}
super.notify(event);
}
SortedSet<MMObjectNode> getByDestinationSource(
MMObjectBuilder source, MMObjectBuilder destination) {
return getByDestinationSourceRole(source.getNumber(), destination.getNumber(), 0);
}
// find some subsets:
SortedSet<MMObjectNode> getBySource(MMObjectBuilder source) {
return getBySourceDestinationRole(source.getNumber(), 0, 0);
}
/**
* Remove a node from the cloud.
*
* @param node The node to remove.
*/
@Override
public void removeNode(MMObjectNode node) {
super.removeNode(node);
}
/**
* Addes one typerel cache entries, plus inherited relations (if builder are initialized)
*
* @return A Set with the added entries, which can be used for logging or so, or can be
* disregarded
* @since MMBase-1.6.2
*/
protected TypeRelSet addCacheEntry(
final MMObjectNode typeRel, final boolean buildersInitialized) {
if (typeRel == null) {
throw new IllegalArgumentException("typeRel cannot be null");
}
final TypeRelSet added =
new TypeRelSet(); // store temporary, which will enable nice logging of what happened
// Start to add the actual definition, this is then afterwards again,
// except if one of the builders could not be found
added.add(typeRel);
if (mmb == null) {
throw new IllegalStateException("mmb is null");
}
final RelDef reldef = mmb.getRelDef();
if (reldef == null) {
throw new IllegalStateException("No reldef found");
}
final MMObjectNode reldefNode = reldef.getNode(typeRel.getIntValue("rnumber"));
if (reldefNode == null) {
throw new RuntimeException(
"Could not find reldef-node for rnumber= " + typeRel.getIntValue("rnumber"));
}
final boolean bidirectional = (!InsRel.usesdir) || (reldefNode.getIntValue("dir") > 1);
INHERITANCE:
if (buildersInitialized) { // handle inheritance, which is
// not possible during
// initialization of MMBase.
final TypeDef typeDef = mmb.getTypeDef();
final String sourceBuilderName = typeDef.getValue(typeRel.getIntValue("snumber"));
final MMObjectBuilder sourceBuilder =
sourceBuilderName != null ? mmb.getBuilder(sourceBuilderName) : null;
final String destinationBuilderName = typeDef.getValue(typeRel.getIntValue("dnumber"));
final MMObjectBuilder destinationBuilder =
destinationBuilderName != null ? mmb.getBuilder(destinationBuilderName) : null;
if (sourceBuilder == null) {
if (destinationBuilder == null) {
log.info(
"Both source and destination of "
+ typeRel
+ " are not active builders. Cannot follow descendants.");
} else {
log.info(
"The source of relation type "
+ typeRel
+ " is not an active builder. Cannot follow descendants.");
}
break INHERITANCE;
}
if (destinationBuilder == null) {
log.warn(
"The destination of relation type "
+ typeRel
+ " is not an active builder. Cannot follow descendants.");
break INHERITANCE;
}
final int rnumber = typeRel.getIntValue("rnumber");
final List<MMObjectBuilder> sources =
new ArrayList<MMObjectBuilder>(sourceBuilder.getDescendants());
sources.add(sourceBuilder);
final List<MMObjectBuilder> destinations =
new ArrayList<MMObjectBuilder>(destinationBuilder.getDescendants());
destinations.add(destinationBuilder);
for (MMObjectBuilder s : sources) {
for (MMObjectBuilder d : destinations) {
MMObjectNode vnode = new VirtualTypeRelNode(s.getNumber(), d.getNumber(), rnumber);
added.add(vnode);
}
}
// seek all parents and store typerels for them
// this cache is used by contains(INCLUDE_PARENTS /
// INCLUDE_PARENTS_AND_DESCENDANTS));
MMObjectBuilder sourceParent = sourceBuilder;
while (sourceParent != null) {
MMObjectBuilder destinationParent = destinationBuilder;
while (destinationParent != null) {
MMObjectNode vnode =
new VirtualTypeRelNode(
sourceParent.getNumber(), destinationParent.getNumber(), rnumber);
parentTypeRelNodes.add(vnode);
destinationParent = destinationParent.getParentBuilder();
}
sourceParent = sourceParent.getParentBuilder();
}
added.add(typeRel); // replaces the ones added in the 'inheritance'
// loop (so now not any more Virtual)
}
for (MMObjectNode node : added) {
if (!node.isVirtual()) {
// make sure 'real' nodes replace virtual nodes. (real and virtual nodes are equal, so will
// not be added to set otherwise)
// This is especially essential whey you use STRICT in contains
typeRelNodes.remove(node);
if (bidirectional) inverseTypeRelNodes.remove(node);
}
typeRelNodes.add(node);
if (bidirectional) inverseTypeRelNodes.add(node);
}
if (log.isDebugEnabled()) {
log.debug("Added to typerelcache: " + added);
}
return added;
}