Package org.eclipse.rdf4j.sail.memory.model

Class MemTriple

java.lang.Object
org.eclipse.rdf4j.sail.memory.model.MemTriple
All Implemented Interfaces:
Serializable, Resource, Triple, Value, MemResource, MemValue
public class MemTriple extends Object implements Triple, MemResource
A MemoryStore-specific implementation of Triple.
Author:
Jeen Broekstra
See Also:

  • Constructor Details

  • Method Details

    • stringValue

      public String stringValue()
      Description copied from interface: Value
      Returns the String-value of a Value object. This returns either a Literal's label, a IRI's URI or a BNode's ID.
      Specified by:
      stringValue in interface Value

    • toString

      public String toString()
      Overrides:
      toString in class Object

    • 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 interface MemValue

    • 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 interface MemValue
      Returns:
      true if the MemValue has statements, false otherwise.

    • 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 interface MemValue
      Returns:
      A MemStatementList containing the statements.

    • 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 interface MemValue
      Returns:
      An integer larger than or equal to 0.

    • 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 interface MemValue

    • 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 interface MemValue

    • 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 interface MemValue
      Parameters:
      currentSnapshot - The current snapshot version.

    • 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 interface MemResource
      Returns:
      a MemStatementList containing the statements.

    • 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 interface MemResource
      Returns:
      An integer larger than or equal to 0.

    • 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 interface MemResource

    • 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 interface MemResource

    • 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 interface MemResource
      Parameters:
      currentSnapshot - The current snapshot version.

    • 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 interface MemResource
      Returns:
      a MemStatementList containing the statements.

    • 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 interface MemResource
      Returns:
      An integer larger than or equal to 0.

    • 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 interface MemResource

    • 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 interface MemResource

    • 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 interface MemResource
      Parameters:
      currentSnapshot - The current snapshot version.

    • getSubject

      public MemResource getSubject()
      Description copied from interface: Triple
      Gets the subject of this triple.
      Specified by:
      getSubject in interface Triple
      Returns:
      The triple's subject.

    • getPredicate

      public MemIRI getPredicate()
      Description copied from interface: Triple
      Gets the predicate of this triple.
      Specified by:
      getPredicate in interface Triple
      Returns:
      The triple's predicate.

    • getObject

      public MemValue getObject()
      Description copied from interface: Triple
      Gets the object of this triple.
      Specified by:
      getObject in interface Triple
      Returns:
      The triple's object.

    • hashCode

      public int hashCode()
      Description copied from interface: Triple
      Computes the hash code of this triple.
      Specified by:
      hashCode in interface Triple
      Overrides:
      hashCode in class Object
      Returns:
      a hash code for this triple computed as Objects.hash( Triple.getSubject(), Triple.getPredicate(), Triple.getObject())

    • equals

      public boolean equals(Object other)
      Description copied from interface: Triple
      Compares this triple to another object.
      Specified by:
      equals in interface Triple
      Overrides:
      equals in class Object
      Parameters:
      other - the object to compare this triple to
      Returns:
      true if the other object is an instance of Triple and if their subjects, predicates and objects are equal; false otherwise