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

Class MemBNode

java.lang.Object
org.eclipse.rdf4j.sail.memory.model.MemResource
org.eclipse.rdf4j.sail.memory.model.MemBNode
All Implemented Interfaces:
Serializable, BNode, Resource, Value, MemValue
public class MemBNode extends MemResource implements BNode
A MemoryStore-specific extension of BNodeImpl giving it node properties.
See Also:

  • Constructor Details

    • MemBNode

      public MemBNode(Object creator, String id)
      Creates a new MemBNode for a bnode ID.
      Parameters:
      creator - The object that is creating this MemBNode.
      id - bnode ID.

  • Method Details

    • 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) throws InterruptedException
      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
      Throws:
      InterruptedException

    • cleanSnapshotsFromObjectStatements

      public void cleanSnapshotsFromObjectStatements(int currentSnapshot) throws InterruptedException
      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.
      Throws:
      InterruptedException

    • hasPredicateStatements

      public boolean hasPredicateStatements()
      Specified by:
      hasPredicateStatements in interface MemValue

    • hasObjectStatements

      public boolean hasObjectStatements()
      Specified by:
      hasObjectStatements in interface MemValue

    • getID

      public String getID()
      Description copied from interface: BNode
      Retrieves this blank node's identifier.
      Specified by:
      getID in interface BNode
      Returns:
      A blank node identifier.

    • 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

    • equals

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

    • hashCode

      public int hashCode()
      Description copied from interface: BNode
      Computes the hash code of this blank node.
      Specified by:
      hashCode in interface BNode
      Overrides:
      hashCode in class Object
      Returns:
      a hash code for this blank node computed as BNode.getID().hashCode()

    • toString

      public String toString()
      Overrides:
      toString in class Object