@Override
public void flushUpdates() throws SailException {
super.flushUpdates();
while (updateNeeded) {
try {
// Determine which statements should be added and which should be
// removed
Collection<Statement> oldStatements = new HashSet<Statement>(256);
Collection<Statement> newStatements = new HashSet<Statement>(256);
evaluateIntoStatements(DIRECT_SUBCLASSOF_MATCHER, oldStatements);
evaluateIntoStatements(DIRECT_SUBPROPERTYOF_MATCHER, oldStatements);
evaluateIntoStatements(DIRECT_TYPE_MATCHER, oldStatements);
evaluateIntoStatements(DIRECT_SUBCLASSOF_QUERY, newStatements);
evaluateIntoStatements(DIRECT_SUBPROPERTYOF_QUERY, newStatements);
evaluateIntoStatements(DIRECT_TYPE_QUERY, newStatements);
logger.debug("existing virtual properties: {}", oldStatements.size());
logger.debug("new virtual properties: {}", newStatements.size());
// Remove the statements that should be retained from both sets
Collection<Statement> unchangedStatements = new HashSet<Statement>(oldStatements);
unchangedStatements.retainAll(newStatements);
oldStatements.removeAll(unchangedStatements);
newStatements.removeAll(unchangedStatements);
logger.debug("virtual properties to remove: {}", oldStatements.size());
logger.debug("virtual properties to add: {}", newStatements.size());
Resource[] contexts = new Resource[] {null};
for (Statement st : oldStatements) {
removeInferredStatement(st.getSubject(), st.getPredicate(), st.getObject(), contexts);
}
for (Statement st : newStatements) {
addInferredStatement(st.getSubject(), st.getPredicate(), st.getObject(), contexts);
}
updateNeeded = false;
} catch (RDFHandlerException e) {
Throwable t = e.getCause();
if (t instanceof SailException) {
throw (SailException) t;
} else {
throw new SailException(t);
}
} catch (QueryEvaluationException e) {
throw new SailException(e);
}
super.flushUpdates();
}
}
@Override
public void rollback() throws SailException {
super.rollback();
updateNeeded = false;
}