| com.hp.hpl.jena.rdf.model.ModelSource
| ModelSource | | public interface ModelSource extends ModelGetter(Code) | | The revised and soon-to-be-core interface for sources of models,
typically generated from RDF descriptions.
ModelSources can supply models in a variety of ways.
- some fresh model of the kind this ModelSource supplies
- the particular model this ModelSource supplies
- a named model from the collection this ModelSource supplies
A ModelSource is free to "forget" named models if it so wishes;
for example, it may be a discard-if-getting-full cache.
author:
hedgehog |
| createDefaultModel | | Model createDefaultModel()(Code) | | Answer this ModelSource's default model. Every ModelSource
has a default model. That model need not exist until the
first call on createDefaultModel. Multiple calls of getModel will
yield the *same* model. This method never returns null.
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| createFreshModel | | Model createFreshModel()(Code) | | Answer a Model that satisfies this ModelSource's shape. Different
calls return different models - they are not permitted to return
the same model. (Doing this on a database model will create new,
pseudo-anonymous, models.) This method never returns null.
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| openModel | | Model openModel(String name)(Code) | | Answer a model. Different ModelSources may implement this
in very different ways - ModelSource imposes few constraints
other than the result is a proper Model. A ModelSource may
use the name to identify an existing Model and re-use it,
or it may create a fresh Model each time.
It is expected that uses of different names will answer
different models (different in the strong sense of not having
the same underlying graph, too).
If the ModelSource does not have a model with this name,
and if it is not prepared to create one, it should throw a
DoesNotExistException. This method never returns null.
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| openModelIfPresent | | Model openModelIfPresent(String string)(Code) | | Answer the model named by string in this ModelSource,
if it [still] has one, or null if there isn't one.
The ModelSource should not create a fresh model if it
doesn't already have one.
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