DedupingInferencer (Eclipse RDF4J 4.2.4)

java.lang.Object
- org.eclipse.rdf4j.sail.helpers.SailWrapper
- - org.eclipse.rdf4j.sail.helpers.NotifyingSailWrapper
  - - org.eclipse.rdf4j.sail.inferencer.fc.DedupingInferencer

All Implemented Interfaces:

FederatedServiceResolverClient, NotifyingSail, Sail, StackableSail
```
public class DedupingInferencer
extends NotifyingSailWrapper
```
An inferencer may infer the same statement from two different statements. This leads to that single inferred statement undergoing inferencing multiple times, and all the statements inferred from it too, etc. This is mainly due to the use of SailConnectionListeners which don't distinguish between adding a new statement and one that already exists. Adding this inferencer to a Sail stack prevents this problem and gives a significant performance increase.

Constructor Summary

Constructors
Constructor Description

DedupingInferencer()

DedupingInferencer(NotifyingSail baseSail)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`InferencerConnection`	`getConnection()`	Opens a connection on the Sail which can be used to query and update data.

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, init, 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, init, isWritable, setDataDir, shutDown

- Constructor Detail
  - DedupingInferencer
```
public DedupingInferencer()
```
  - DedupingInferencer
```
public DedupingInferencer(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.