uk.ac.ic.doc.automed.qproc.refo
Class VirtualReformulationProvider

java.lang.Object
  uk.ac.bbk.dcs.automed.qproc.reformulate.GAVQueryReformulationProvider
      uk.ac.ic.doc.automed.qproc.refo.VirtualReformulationProvider

public class VirtualReformulationProvider
extends GAVQueryReformulationProvider

A 'specialised' reformulation provider for the specialised virtual schema. Basically, since we are querying an SMR overlay network for objects matching a given query we do not know in advance what the objects are. So, this reformulation class must accept the fact that the query's schemes do not exist in the schema.

Author:

Duc Minh Le

Field Summary

private QueryProcessorConfiguration

_qpc

Fields inherited from class uk.ac.bbk.dcs.automed.qproc.reformulate.GAVQueryReformulationProvider

logger, sourceSchema, targetSchemata, viewmap

Constructor Summary

protected	VirtualReformulationProvider()
	VirtualReformulationProvider(Schema sourceSchema, Schema[] targetSchemata, QueryProcessorConfiguration qpc)

Method Summary

void	reformulate(ASG g, QueryProcessorConfiguration qpc) Simply tags the schemes with the schema prefix.
private void	tempFun(Cell c)

Methods inherited from class uk.ac.bbk.dcs.automed.qproc.reformulate.GAVQueryReformulationProvider

buildViews, finalize, main

Methods inherited from class java.lang.Object

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

Field Detail

_qpc

private QueryProcessorConfiguration _qpc

Constructor Detail

VirtualReformulationProvider

protected VirtualReformulationProvider()

VirtualReformulationProvider

public VirtualReformulationProvider(Schema sourceSchema,
                                    Schema[] targetSchemata,
                                    QueryProcessorConfiguration qpc)
                             throws QueryReformulationException

Parameters:

sourceschema - the source schema

targetschemata - the target schemata

qpc - the input configuration

Throws:

QueryReformulationException - if there was a problem building the view definitions of the source schema constructs over target schema constructs

Method Detail

reformulate

public void reformulate(ASG g,
                        QueryProcessorConfiguration qpc)
                 throws QueryReformulationException

Simply tags the schemes with the schema prefix.

Overrides:

reformulate in class GAVQueryReformulationProvider

Throws:

QueryReformulationException

tempFun

private void tempFun(Cell c)