Andy Seaborne created JENA-1447:
-----------------------------------
Summary: Special case DatasetGraphs
Key: JENA-1447
URL: https://issues.apache.org/jira/browse/JENA-1447
Project: Apache Jena
Issue Type: Bug
Components: ARQ
Affects Versions: Jena 3.5.0
Reporter: Andy Seaborne
Assignee: Andy Seaborne
Some specialized datasets:
{{DatasetGraphOne}} - a dataset around a single which becomes the default
graph. This is the converter from graphs to datasets. A special case is where
the graph is GraphView from another dataset. The existing {{DatasetGraphOne}}
needs upgrading to map dataset transactions back to the original dataset.
{{DatasetGraphZero}} - a dataset with no named graph and an always-empty
default graph. Convenient to have in place of null pointers.
{{DatasetGraphSink}} - a dataset that accepts updated but ignores them and so
is always empty.
{{TransactionalNull}} - a transactional to reflect the properties of empty
datasets.
In support of these:
{{GraphSink}}, {{GraphZero}}, {{PrefixMappingSink}}, {{PrefixMappingZero}} and
{{TransactionHandlerNull}}.
On naming:
"DatasetGraphZero" might also be "DatasetGraphNull" but {{/dev/null}} is a sink.
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
