private void ScanEverythingBelongingToNodes(NodeMappings nodeMappings)
{
using (NodeCursor nodeCursor = _cursors.allocateNodeCursor(), PropertyCursor propertyCursor = _cursors.allocatePropertyCursor())
{
_dataRead.allNodesScan(nodeCursor);
while (nodeCursor.Next())
{
// each node
SortedLabels labels = SortedLabels.From(nodeCursor.Labels());
nodeCursor.Properties(propertyCursor);
MutableIntSet propertyIds = IntSets.mutable.empty();
while (propertyCursor.Next())
{
Value currentValue = propertyCursor.PropertyValue();
int propertyKeyId = propertyCursor.PropertyKey();
Pair <SortedLabels, int> key = Pair.of(labels, propertyKeyId);
UpdateValueTypeInMapping(currentValue, key, nodeMappings.LabelSetANDNodePropertyKeyIdToValueType);
propertyIds.add(propertyKeyId);
}
propertyCursor.Close();
MutableIntSet oldPropertyKeySet = nodeMappings.LabelSetToPropertyKeys.getOrDefault(labels, _emptyPropertyIdSet);
// find out which old properties we did not visited and mark them as nullable
if (oldPropertyKeySet == _emptyPropertyIdSet)
{
if (propertyIds.size() == 0)
{
// Even if we find property key on other nodes with those labels, set all of them nullable
nodeMappings.NullableLabelSets.Add(labels);
}
propertyIds.addAll(oldPropertyKeySet);
}
else
{
MutableIntSet currentPropertyIdsHelperSet = new IntHashSet(propertyIds.size());
currentPropertyIdsHelperSet.addAll(propertyIds);
propertyIds.removeAll(oldPropertyKeySet); // only the brand new ones in propIds now
oldPropertyKeySet.removeAll(currentPropertyIdsHelperSet); // only the old ones that are not on the new node
propertyIds.addAll(oldPropertyKeySet);
propertyIds.forEach(id =>
{
Pair <SortedLabels, int> key = Pair.of(labels, id);
nodeMappings.LabelSetANDNodePropertyKeyIdToValueType[key].setNullable();
});
propertyIds.addAll(currentPropertyIdsHelperSet);
}
nodeMappings.LabelSetToPropertyKeys[labels] = propertyIds;
}
nodeCursor.Close();
}
}
private void ScanEverythingBelongingToRelationships(RelationshipMappings relMappings)
{
using (RelationshipScanCursor relationshipScanCursor = _cursors.allocateRelationshipScanCursor(), PropertyCursor propertyCursor = _cursors.allocatePropertyCursor())
{
_dataRead.allRelationshipsScan(relationshipScanCursor);
while (relationshipScanCursor.Next())
{
int typeId = relationshipScanCursor.Type();
relationshipScanCursor.Properties(propertyCursor);
MutableIntSet propertyIds = IntSets.mutable.empty();
while (propertyCursor.Next())
{
int propertyKey = propertyCursor.PropertyKey();
Value currentValue = propertyCursor.PropertyValue();
Pair <int, int> key = Pair.of(typeId, propertyKey);
UpdateValueTypeInMapping(currentValue, key, relMappings.RelationshipTypeIdANDPropertyTypeIdToValueType);
propertyIds.add(propertyKey);
}
propertyCursor.Close();
MutableIntSet oldPropertyKeySet = relMappings.RelationshipTypeIdToPropertyKeys.getOrDefault(typeId, _emptyPropertyIdSet);
// find out which old properties we did not visited and mark them as nullable
if (oldPropertyKeySet == _emptyPropertyIdSet)
{
if (propertyIds.size() == 0)
{
// Even if we find property key on other rels with this type, set all of them nullable
relMappings.NullableRelationshipTypes.Add(typeId);
}
propertyIds.addAll(oldPropertyKeySet);
}
else
{
MutableIntSet currentPropertyIdsHelperSet = new IntHashSet(propertyIds.size());
currentPropertyIdsHelperSet.addAll(propertyIds);
propertyIds.removeAll(oldPropertyKeySet); // only the brand new ones in propIds now
oldPropertyKeySet.removeAll(currentPropertyIdsHelperSet); // only the old ones that are not on the new rel
propertyIds.addAll(oldPropertyKeySet);
propertyIds.forEach(id =>
{
Pair <int, int> key = Pair.of(typeId, id);
relMappings.RelationshipTypeIdANDPropertyTypeIdToValueType[key].setNullable();
});
propertyIds.addAll(currentPropertyIdsHelperSet);
}
relMappings.RelationshipTypeIdToPropertyKeys[typeId] = propertyIds;
}
relationshipScanCursor.Close();
}
}