public class PeriodicScheduleNatureImpl extends BaseScheduleNatureImpl
implements PeriodicScheduleNature {
public static final @NonNull String NAME = "org.allmyinfo.schedule.periodic";
@SuppressWarnings("unused")
private static final @NonNull Logger LOGGER = Logger.getLogger(PeriodicScheduleNatureImpl.class);
private final @NonNull ScheduleNatureImpl scheduleNature;
private final PeriodMeaning.@NonNull Reactor pmReactor;
private final @NonNull OffsetToPeriodicScheduleAssignmentNatureImpl otpsan;
PeriodicScheduleNatureImpl(
final @NonNull NodeId nodeId,
final AnonymousSecurityUser.@NonNull Reactor asuReactor,
final Coordinator.@NonNull Reactor coordReactor, //
final SystemContextProvider.@NonNull Reactor scpReactor,
final OwnerMeaning.@NonNull Reactor omReactor,
final @NonNull ScheduleNatureImpl scheduleNature,
final PeriodMeaning.@NonNull Reactor pmReactor,
final @NonNull OffsetToPeriodicScheduleAssignmentNatureImpl otpsan,
final @NonNull RowIdsNodeKeyType rinkt) {
super(nodeId, asuReactor, coordReactor, scpReactor, omReactor, rinkt);
this.scheduleNature = scheduleNature;
this.pmReactor = pmReactor;
this.otpsan = otpsan;
}
@Override
public @NonNull Set<Nature> getSuperNatures() {
final Set<Nature> set = super.getSuperNatures();
set.add(scheduleNature);
return set;
}
@Override
protected @NonNull Set<NodeId> getRequiredMeanings() {
final Set<NodeId> set = super.getRequiredMeanings();
set.add(pmReactor.getInstance().getNodeId());
return set;
}
@Override
public @NonNull Schedule getSchedule(
@NonNull final NodesTransaction txn, @NonNull final NodeId nodeId) {
return getPeriodicSchedule(txn, nodeId);
}
@Override
public @NonNull PeriodicSchedule getPeriodicSchedule(
@NonNull final NodesTransaction txn, @NonNull final NodeId nodeId) {
final PeriodMeaning pm = pmReactor.getInstance();
final Period period = pm.getPeriod(txn, nodeId);
if (period == null) throw new NullPointerException("period");
final @NonNull Set<@NonNull Long> offsets = otpsan.getOffsets(txn, nodeId);
return new PeriodicScheduleImpl(period, offsets);
}
}
public static class SAXHandler extends DefaultHandler {
private static final Logger LOGGER1 = Logger.getLogger(SAXHandler.class);
private final @NonNull List<Canceller> cancellers = new LinkedList<Canceller>();
private final @NonNull NodesTransaction txn;
private final @NonNull NamedNodeIdType nnit;
private final @NonNull Int2NodeIdType i2nit;
private final @NonNull ParentMeaning parentMeaning;
private Level level = new Level(null);
public SAXHandler(
final @NonNull NodesTransaction txn,
final @NonNull NamedNodeIdType nnit,
final @NonNull Int2NodeIdType i2nit,
final @NonNull ParentMeaning parentMeaning) {
this.txn = txn;
this.nnit = nnit;
this.i2nit = i2nit;
this.parentMeaning = parentMeaning;
}
public void add(final Canceller canceller) {
if (canceller != null) cancellers.add(canceller);
}
@Override
public void warning(final SAXParseException e) {
SAXHandler.LOGGER1.warn("Received warning notification from SAX parser", e);
}
@Override
public void error(final SAXParseException e) {
SAXHandler.LOGGER1.error("Received error notification from SAX parser", e);
}
@Override
public void fatalError(final SAXParseException e) {
SAXHandler.LOGGER1.error("Received fatal error notification from SAX parser", e);
}
@Override
public void characters(final char[] ch, final int start, final int length) {
level.sb.append(ch, start, length);
}
@Override
public void startDocument() {}
@Override
public void endDocument() {}
@Override
public void startElement(
final String uriString,
final String localName,
final String qName,
final Attributes saxAttrs)
throws SAXException {
checkCancelled();
final Level parentLevel = level;
level = new Level(parentLevel);
// uriString + localName = global meaning
// if no uriString then localName = meaning to parent
final NodeId meaningNodeId = constructMeaningNodeId(parentLevel, uriString, localName);
// link through an intermediate node in case there are duplicates
NodeId targetNodeId = txn.getTarget(parentLevel.nodeId, meaningNodeId);
if (targetNodeId == null) {
targetNodeId = i2nit.create(parentLevel.nodeId, parentLevel.index++);
txn.insertLink(parentLevel.nodeId, targetNodeId, meaningNodeId, false);
}
txn.insertLink(level.nodeId, targetNodeId, parentMeaning.getNodeId(), false);
// create nodes for attributes
for (int i = 0; i < saxAttrs.getLength(); i++) {
final String attrLocalName = saxAttrs.getLocalName(i);
final String attrUriString = saxAttrs.getURI(i);
final String attrValue = saxAttrs.getValue(i);
if (attrValue != null) {
final NodeId attrNodeId = txn.insertNode(new StringDatum(attrValue));
final NodeId attrMeaningNodeId =
constructMeaningNodeId(level, attrUriString, attrLocalName);
// TODO what if an attribute name collides with an element name?
txn.insertLink(level.nodeId, attrNodeId, attrMeaningNodeId, false);
txn.dereference(attrNodeId);
}
}
}
@Override
public void endElement(final String uriString, final String localName, final String qName) {
// save text, if any
if (level.sb.length() > 0) {
final String string = level.sb.toString();
if (string != null) txn.updateNode(level.nodeId, new StringDatum(string));
}
level = level.parent;
}
@Override
public void startPrefixMapping(final String prefix, final String uriString) {}
@Override
public void endPrefixMapping(final String prefix) {}
private final void checkCancelled() throws CancelledException {
for (final Canceller canceller : cancellers)
if (canceller.wasCancelled()) throw new CancelledException();
}
private @NonNull NodeId constructMeaningNodeId(
final Level parentLevel, final String uriString, final String localName) {
NodeId meaningNodeId;
if (localName != null) {
if (uriString != null) {
// create a meaning relative to the namespace URI
final NodeId namespaceNodeId = nnit.create(null, uriString);
meaningNodeId = nnit.create(namespaceNodeId, localName);
} else {
// uriString is null, create a meaning relative to the parent
meaningNodeId = nnit.create(parentLevel.nodeId, localName);
}
} else {
// localName is null, create an indexed meaning relative to the parent
meaningNodeId = i2nit.create(parentLevel.nodeId, parentLevel.index++);
}
return meaningNodeId;
}
}