private CDORevision applyDelta(CDORevisionDelta revisionDelta) {
CDOID id = revisionDelta.getID();
CDORevision changedObject = delegate.getRevision(id).copy();
revisionDelta.apply(changedObject);
cachedRevisions.put(id, changedObject);
return changedObject;
}
public synchronized CDORevision getRevision(CDOID id) {
if (cachedRevisions == null) {
cachedRevisions = cacheRevisions();
}
CDOIDAndVersion key = cachedRevisions.get(id);
if (key == DETACHED) {
return null;
}
if (key instanceof CDORevision) // New object (eager)
{
return (CDORevision) key;
}
if (key instanceof CDORevisionDelta) // Changed object (eager)
{
CDORevisionDelta revisionDelta = (CDORevisionDelta) key;
return applyDelta(revisionDelta);
}
if (key instanceof CDORevisionKey) // Changed object (lazy)
{
CDORevisionDelta revisionDelta = revisionDeltaCallback.getRevisionDelta(id);
return applyDelta(revisionDelta);
}
if (key != null) // New object (lazy)
{
CDORevision revision = revisionCallback.getRevision(id);
cachedRevisions.put(id, revision);
return revision;
}
return delegate.getRevision(id);
}