Package org.eclipse.rdf4j.sail.inferencer.fc

Class DirectTypeHierarchyInferencer

java.lang.Object

org.eclipse.rdf4j.sail.helpers.SailWrapper

org.eclipse.rdf4j.sail.helpers.NotifyingSailWrapper

org.eclipse.rdf4j.sail.inferencer.fc.DirectTypeHierarchyInferencer

All Implemented Interfaces:

FederatedServiceResolverClient, NotifyingSail, Sail, StackableSail

public class DirectTypeHierarchyInferencer
extends NotifyingSailWrapper

A forward-chaining inferencer that infers the direct-type hierarchy relations sesame:directSubClassOf, sesame:directSubPropertyOf and sesame:directType.

The semantics of this inferencer are defined as follows:

    Class A is a direct subclass of B iff:
       1. A is a subclass of B and;
       2. A and B are not equa and;
       3. there is no class C (unequal A and B) such that
          A is a subclass of C and C of B.

    Property P is a direct subproperty of Q iff:
       1. P is a subproperty of Q and;
       2. P and Q are not equal and;
       3. there is no property R (unequal P and Q) such that
          P is a subproperty of R and R of Q.

    Resource I is of direct type T iff:
       1. I is of type T and
       2. There is no class U (unequal T) such that:
           a. U is a subclass of T and;
           b. I is of type U.
 

Constructor Summary

Constructors

Constructor	Description
DirectTypeHierarchyInferencer()
DirectTypeHierarchyInferencer(NotifyingSail baseSail)

Method Summary

Modifier and Type	Method	Description
InferencerConnection	getConnection()	Opens a connection on the Sail which can be used to query and update data.
void	init()	Initializes the Sail.

Methods inherited from class org.eclipse.rdf4j.sail.helpers.NotifyingSailWrapper

addSailChangedListener, getBaseSail, removeSailChangedListener, setBaseSail

Methods inherited from class org.eclipse.rdf4j.sail.helpers.SailWrapper

getDataDir, getDefaultIsolationLevel, getSupportedIsolationLevels, getValueFactory, isWritable, setDataDir, setFederatedServiceResolver, shutDown, verifyBaseSailSet

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.eclipse.rdf4j.sail.Sail

getDataDir, getDefaultIsolationLevel, getSupportedIsolationLevels, getValueFactory, isWritable, setDataDir, shutDown

Constructor Detail

DirectTypeHierarchyInferencer

public DirectTypeHierarchyInferencer()

DirectTypeHierarchyInferencer

public DirectTypeHierarchyInferencer(NotifyingSail baseSail)

Method Detail

getConnection

public InferencerConnection getConnection()
                                   throws SailException

Description copied from interface: Sail

Opens a connection on the Sail which can be used to query and update data. Depending on how the implementation handles concurrent access, a call to this method might block when there is another open connection on this Sail.

Specified by:

getConnection in interface NotifyingSail

Specified by:

getConnection in interface Sail

Overrides:

getConnection in class NotifyingSailWrapper

Throws:

SailException - If no transaction could be started, for example because the Sail is not writable.

init

public void init()
          throws SailException

Description copied from interface: Sail

Initializes the Sail. Care should be taken that required initialization parameters have been set before this method is called. Please consult the specific Sail implementation for information about the relevant parameters.

Specified by:

init in interface Sail

Overrides:

init in class SailWrapper

Throws:

SailException - If the Sail could not be initialized.