Package org.eclipse.rdf4j.sail.base
Class DelegatingSailDataset
java.lang.Object
org.eclipse.rdf4j.sail.base.DelegatingSailDataset
- All Implemented Interfaces:
AutoCloseable
,SailClosable
,SailDataset
- Direct Known Subclasses:
ObservingSailDataset
A wrapper around an
SailDataset
to specialize the behaviour of an SailDataset
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Field Summary
Fields -
Constructor Summary
ConstructorsConstructorDescriptionDelegatingSailDataset
(SailDataset delegate) Wraps anSailDataset
delegating all calls to it. -
Method Summary
Modifier and TypeMethodDescriptionvoid
close()
Called when thisSailDataset
is no longer is used, such as when a read operation is complete.CloseableIteration
<? extends Resource, SailException> Returns the set of all unique context identifiers that are used to store statements.getNamespace
(String prefix) Gets the namespace that is associated with the specified prefix, if any.CloseableIteration
<? extends Namespace, SailException> Gets the namespaces relevant to the data contained in this object.CloseableIteration
<? extends Statement, SailException> getStatements
(Resource subj, IRI pred, Value obj, Resource... contexts) Gets all statements that have a specific subject, predicate and/or object.CloseableIteration
<? extends Triple, SailException> getTriples
(Resource subj, IRI pred, Value obj) Gets all RDF-star triples that have a specific subject, predicate and/or object.toString()
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Field Details
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delegate
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Constructor Details
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DelegatingSailDataset
Wraps anSailDataset
delegating all calls to it.- Parameters:
delegate
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Method Details
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toString
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close
Description copied from interface:SailDataset
Called when thisSailDataset
is no longer is used, such as when a read operation is complete. An isolation level compatible withIsolationLevels.SNAPSHOT
will ensure the state of thisSailDataset
dose not change between the first call to this object untilinvalid reference
SailClosable#release()
- Specified by:
close
in interfaceAutoCloseable
- Specified by:
close
in interfaceSailClosable
- Specified by:
close
in interfaceSailDataset
- Throws:
SailException
- if this resource cannot be closed
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getNamespaces
Description copied from interface:SailDataset
Gets the namespaces relevant to the data contained in this object.- Specified by:
getNamespaces
in interfaceSailDataset
- Returns:
- An iterator over the relevant namespaces, should not contain any duplicates.
- Throws:
SailException
- If this object encountered an error or unexpected situation internally.
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getNamespace
Description copied from interface:SailDataset
Gets the namespace that is associated with the specified prefix, if any.- Specified by:
getNamespace
in interfaceSailDataset
- Parameters:
prefix
- A namespace prefix, or an empty string in case of the default namespace.- Returns:
- The namespace name that is associated with the specified prefix, or null if there is no such namespace.
- Throws:
SailException
- If this object encountered an error or unexpected situation internally.
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getContextIDs
Description copied from interface:SailDataset
Returns the set of all unique context identifiers that are used to store statements.- Specified by:
getContextIDs
in interfaceSailDataset
- Returns:
- An iterator over the context identifiers, should not contain any duplicates.
- Throws:
SailException
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getStatements
public CloseableIteration<? extends Statement,SailException> getStatements(Resource subj, IRI pred, Value obj, Resource... contexts) throws SailException Description copied from interface:SailDataset
Gets all statements that have a specific subject, predicate and/or object. All three parameters may be null to indicate wildcards. Optionally a (set of) context(s) may be specified in which case the result will be restricted to statements matching one or more of the specified contexts.- Specified by:
getStatements
in interfaceSailDataset
- Parameters:
subj
- A Resource specifying the subject, or null for a wildcard.pred
- A IRI specifying the predicate, or null for a wildcard.obj
- A Value specifying the object, or null for a wildcard.contexts
- The context(s) to get the statements from. Note that this parameter is a vararg and as such is optional. If no contexts are supplied the method operates on all contexts.- Returns:
- An iterator over the relevant statements.
- Throws:
SailException
- If the triple source failed to get the statements.
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getTriples
public CloseableIteration<? extends Triple,SailException> getTriples(Resource subj, IRI pred, Value obj) throws SailException Description copied from interface:SailDataset
Gets all RDF-star triples that have a specific subject, predicate and/or object. All three parameters may be null to indicate wildcards.- Specified by:
getTriples
in interfaceSailDataset
- Parameters:
subj
- A Resource specifying the subject, or null for a wildcard.pred
- A IRI specifying the predicate, or null for a wildcard.obj
- A Value specifying the object, or null for a wildcard.- Returns:
- An iterator over the relevant triples.
- Throws:
SailException
- If the triple source failed to get the RDF-star triples.
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