com.hp.hpl.mesa.rdf.jena.rdb
Class DriverGenericHash

java.lang.Object
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  +--com.hp.hpl.mesa.rdf.jena.rdb.DriverGenericGeneric
        |
        +--com.hp.hpl.mesa.rdf.jena.rdb.DriverGenericHash

All Implemented Interfaces:

IRDBDriver

Direct Known Subclasses:

DriverGenericMMHash, DriverInterbaseHash

public class DriverGenericHash

extends DriverGenericGeneric

Adaption of the base generic layout driver to use unique hashes of as the index terms instead of relying on database sequences. This is useful for databases without useful sequences/generators it may also yield marginally higher performance.

Version:

$Revision: 1.3 $ on $Date: 2001/12/05 17:56:49 $

Author:

Dave Reynolds

Fields inherited from class com.hp.hpl.mesa.rdf.jena.rdb.DriverGenericGeneric

ANON_NAMESPACE

Constructor Summary

DriverGenericHash()
Create a bare instance of the driver.

Method Summary

IDBID

wrapDBID(java.lang.Object id) Convert the raw SQL object used to store a database identifier into a java object which meets the IDBID interface.

Methods inherited from class com.hp.hpl.mesa.rdf.jena.rdb.DriverGenericGeneric

addStatement, allocateModelID, attachStore, cleanDB, close, createConstraints, deleteStatement, detachStore, formatDB, getConnection, getLiteral, getLiteralID, getModelID, getNamespace, getProperty, getProperty, getResource, getResource, getResourceID, getSQLCache, hintPropertyTable, isDBFormatOK, isStatementPresent, listModels, listNamespaces, listStatements, listStatements, listSubjects, loadDatabaseDriver, loadProperties, makeResource, saveProperties, setConnection, supportsMultipleModels, toString, wrapFlag

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

DriverGenericHash

public DriverGenericHash()

Create a bare instance of the driver. It is not functional until a database connection has been supplied via setConnection.

Method Detail

wrapDBID

public IDBID wrapDBID(java.lang.Object id)

Convert the raw SQL object used to store a database identifier into a java object which meets the IDBID interface.

Overrides:

wrapDBID in class DriverGenericGeneric