Class MemTriple
- java.lang.Object
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- org.eclipse.rdf4j.sail.memory.model.MemTriple
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- All Implemented Interfaces:
Serializable
,Resource
,Triple
,Value
,MemResource
,MemValue
public class MemTriple extends Object implements Triple, MemResource
A MemoryStore-specific implementation ofTriple
.- Author:
- Jeen Broekstra
- See Also:
- Serialized Form
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Field Summary
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Fields inherited from interface org.eclipse.rdf4j.sail.memory.model.MemValue
EMPTY_LIST
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Constructor Summary
Constructors Constructor Description MemTriple(Object creator, MemResource subject, MemIRI predicate, MemValue object)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
addContextStatement(MemStatement st)
Adds a statement to this MemResource's list of statements for which it represents the context.void
addObjectStatement(MemStatement st)
Adds a statement to this MemValue's list of statements for which it is the object.void
addSubjectStatement(MemStatement st)
Adds a statement to this MemResource's list of statements for which it is the subject.void
cleanSnapshotsFromContextStatements(int currentSnapshot)
Removes statements from old snapshots (those that have expired at or before the specified snapshot version) from this MemValue's list of statements for which it is the context.void
cleanSnapshotsFromObjectStatements(int currentSnapshot)
Removes statements from old snapshots (those that have expired at or before the specified snapshot version) from this MemValue's list of statements for which it is the object.void
cleanSnapshotsFromSubjectStatements(int currentSnapshot)
Removes statements from old snapshots (those that have expired at or before the specified snapshot version) from this MemValue's list of statements for which it is the subject.boolean
equals(Object other)
Compares this triple to another object.int
getContextStatementCount()
Gets the number of statements for which this MemResource represents the context.MemStatementList
getContextStatementList()
Gets the list of statements for which this MemResource represents the context.Object
getCreator()
Returns the object that created this MemValue.Value
getObject()
Gets the object of this triple.int
getObjectStatementCount()
Gets the number of statements for which this MemValue is the object.MemStatementList
getObjectStatementList()
Gets the list of statements for which this MemValue is the object.IRI
getPredicate()
Gets the predicate of this triple.Resource
getSubject()
Gets the subject of this triple.int
getSubjectStatementCount()
Gets the number of statements for which this MemResource is the subject.MemStatementList
getSubjectStatementList()
Gets the list of statements for which this MemResource is the subject.int
hashCode()
Computes the hash code of this triple.boolean
hasStatements()
Checks whether this MemValue has any statements.void
removeContextStatement(MemStatement st)
Removes a statement from this MemResource's list of statements for which it represents the context.void
removeObjectStatement(MemStatement st)
Removes a statement from this MemValue's list of statements for which it is the object.void
removeSubjectStatement(MemStatement st)
Removes a statement from this MemResource's list of statements for which it is the subject.String
stringValue()
Returns the String-value of a Value object.String
toString()
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Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
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Methods inherited from interface org.eclipse.rdf4j.model.Resource
isResource
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Constructor Detail
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MemTriple
public MemTriple(Object creator, MemResource subject, MemIRI predicate, MemValue object)
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Method Detail
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stringValue
public String stringValue()
Description copied from interface:Value
Returns the String-value of a Value object. This returns either aLiteral
's label, aIRI
's URI or aBNode
's ID.- Specified by:
stringValue
in interfaceValue
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getCreator
public Object getCreator()
Description copied from interface:MemValue
Returns the object that created this MemValue. MemValues are only unique within a single repository, but an application could use several repositories at the same time, passing MemValues generated by one Sail to another Sail. In such situations, the MemValue of the first Sail cannot be used by the second Sail.- Specified by:
getCreator
in interfaceMemValue
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hasStatements
public boolean hasStatements()
Description copied from interface:MemValue
Checks whether this MemValue has any statements. A MemValue object has statements if there is at least one statement where it is used as the subject, predicate, object or context value.- Specified by:
hasStatements
in interfaceMemValue
- Returns:
- true if the MemValue has statements, false otherwise.
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getObjectStatementList
public MemStatementList getObjectStatementList()
Description copied from interface:MemValue
Gets the list of statements for which this MemValue is the object.- Specified by:
getObjectStatementList
in interfaceMemValue
- Returns:
- A MemStatementList containing the statements.
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getObjectStatementCount
public int getObjectStatementCount()
Description copied from interface:MemValue
Gets the number of statements for which this MemValue is the object.- Specified by:
getObjectStatementCount
in interfaceMemValue
- Returns:
- An integer larger than or equal to 0.
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addObjectStatement
public void addObjectStatement(MemStatement st)
Description copied from interface:MemValue
Adds a statement to this MemValue's list of statements for which it is the object.- Specified by:
addObjectStatement
in interfaceMemValue
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removeObjectStatement
public void removeObjectStatement(MemStatement st)
Description copied from interface:MemValue
Removes a statement from this MemValue's list of statements for which it is the object.- Specified by:
removeObjectStatement
in interfaceMemValue
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cleanSnapshotsFromObjectStatements
public void cleanSnapshotsFromObjectStatements(int currentSnapshot)
Description copied from interface:MemValue
Removes statements from old snapshots (those that have expired at or before the specified snapshot version) from this MemValue's list of statements for which it is the object.- Specified by:
cleanSnapshotsFromObjectStatements
in interfaceMemValue
- Parameters:
currentSnapshot
- The current snapshot version.
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getSubjectStatementList
public MemStatementList getSubjectStatementList()
Description copied from interface:MemResource
Gets the list of statements for which this MemResource is the subject.- Specified by:
getSubjectStatementList
in interfaceMemResource
- Returns:
- a MemStatementList containing the statements.
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getSubjectStatementCount
public int getSubjectStatementCount()
Description copied from interface:MemResource
Gets the number of statements for which this MemResource is the subject.- Specified by:
getSubjectStatementCount
in interfaceMemResource
- Returns:
- An integer larger than or equal to 0.
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addSubjectStatement
public void addSubjectStatement(MemStatement st)
Description copied from interface:MemResource
Adds a statement to this MemResource's list of statements for which it is the subject.- Specified by:
addSubjectStatement
in interfaceMemResource
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removeSubjectStatement
public void removeSubjectStatement(MemStatement st)
Description copied from interface:MemResource
Removes a statement from this MemResource's list of statements for which it is the subject.- Specified by:
removeSubjectStatement
in interfaceMemResource
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cleanSnapshotsFromSubjectStatements
public void cleanSnapshotsFromSubjectStatements(int currentSnapshot)
Description copied from interface:MemResource
Removes statements from old snapshots (those that have expired at or before the specified snapshot version) from this MemValue's list of statements for which it is the subject.- Specified by:
cleanSnapshotsFromSubjectStatements
in interfaceMemResource
- Parameters:
currentSnapshot
- The current snapshot version.
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getContextStatementList
public MemStatementList getContextStatementList()
Description copied from interface:MemResource
Gets the list of statements for which this MemResource represents the context.- Specified by:
getContextStatementList
in interfaceMemResource
- Returns:
- a MemStatementList containing the statements.
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getContextStatementCount
public int getContextStatementCount()
Description copied from interface:MemResource
Gets the number of statements for which this MemResource represents the context.- Specified by:
getContextStatementCount
in interfaceMemResource
- Returns:
- An integer larger than or equal to 0.
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addContextStatement
public void addContextStatement(MemStatement st)
Description copied from interface:MemResource
Adds a statement to this MemResource's list of statements for which it represents the context.- Specified by:
addContextStatement
in interfaceMemResource
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removeContextStatement
public void removeContextStatement(MemStatement st)
Description copied from interface:MemResource
Removes a statement from this MemResource's list of statements for which it represents the context.- Specified by:
removeContextStatement
in interfaceMemResource
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cleanSnapshotsFromContextStatements
public void cleanSnapshotsFromContextStatements(int currentSnapshot)
Description copied from interface:MemResource
Removes statements from old snapshots (those that have expired at or before the specified snapshot version) from this MemValue's list of statements for which it is the context.- Specified by:
cleanSnapshotsFromContextStatements
in interfaceMemResource
- Parameters:
currentSnapshot
- The current snapshot version.
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getSubject
public Resource getSubject()
Description copied from interface:Triple
Gets the subject of this triple.- Specified by:
getSubject
in interfaceTriple
- Returns:
- The triple's subject.
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getPredicate
public IRI getPredicate()
Description copied from interface:Triple
Gets the predicate of this triple.- Specified by:
getPredicate
in interfaceTriple
- Returns:
- The triple's predicate.
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getObject
public Value getObject()
Description copied from interface:Triple
Gets the object of this triple.
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hashCode
public int hashCode()
Description copied from interface:Triple
Computes the hash code of this triple.- Specified by:
hashCode
in interfaceTriple
- Overrides:
hashCode
in classObject
- Returns:
- a hash code for this triple computed as
Objects.hash
(Triple.getSubject()
,Triple.getPredicate()
,Triple.getObject()
)
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