uk.ac.bbk.dcs.automed.qproc.reformulate
Class BAVViewMap

java.lang.Object
  uk.ac.bbk.dcs.automed.qproc.reformulate.CompositeViewMap
      uk.ac.bbk.dcs.automed.qproc.reformulate.BAVViewMap

public class BAVViewMap
extends CompositeViewMap

Class containing BAV composite views between a single source schema and a single target schema. BAV views are constructed from ADD, EXTEND, DELETE, CONTRACT, RENAME and IDENTITY atomic views. The ADD and EXTEND atomic views need to be processed further before these could be used to form composite views. Currently we used Inverse Rules algorithm as described in the following paper:

         P.J. McBrien and A. Poulovassilis. P2P query reformulation over Both-as-View
         data transformation rules. In Proc of DBISP2P 2006.
 

Author:

Lucas Zamboulis, Sandeep Mittal

Field Summary

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

_instanceCache, _logger, _name, _qpc, _sourceSchema, _targetSchema, _viewMap

Constructor Summary

protected

BAVViewMap(Schema source, Schema target, QueryProcessorConfiguration qpc) This constructor is called from CompositeViewMap class getInstance() method.

Method Summary

protected void

buildViews() Constructs the composite views

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

buildViews, composeView, computeName, getFinalConstructs, getInstance, getName, getSourceSchema, getTargetSchema, getViewMap, populateViewMap, searchAndReplace, showInstanceCache, showViewMap, updateSchemaRef

Methods inherited from class java.lang.Object

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

Constructor Detail

BAVViewMap

protected BAVViewMap(Schema source,
                     Schema target,
                     QueryProcessorConfiguration qpc)
              throws BuildViewException

This constructor is called from CompositeViewMap class getInstance() method. Do not otherwise.

Parameters:

source - Source Schema

target - Target Schema

qpc - Query Processor configuration

Throws:

BuildViewException

Method Detail

buildViews

protected void buildViews()
                   throws BuildViewException

Constructs the composite views

Specified by:

buildViews in class CompositeViewMap

Throws:

BuildViewException