it.unibz.inf.ontop.iq.transform.impl

Class NodeBasedQueryTransformer

java.lang.Object

it.unibz.inf.ontop.iq.transform.impl.NodeBasedQueryTransformer

All Implemented Interfaces:

QueryTransformer

public abstract class NodeBasedQueryTransformer
extends Object
implements QueryTransformer

Implementation based on a QueryNodeTransformer

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	NodeBasedQueryTransformer(HomogeneousQueryNodeTransformer nodeTransformer)

Method Summary

Modifier and Type	Method and Description
protected IntermediateQueryBuilder	convertToBuilderAndTransform(IntermediateQuery originalQuery, HomogeneousQueryNodeTransformer nodeTransformer, DistinctVariableOnlyDataAtom transformedProjectionAtom) TODO: explain
IntermediateQuery	transform(IntermediateQuery originalQuery)
protected abstract DistinctVariableOnlyDataAtom	transformProjectionAtom(DistinctVariableOnlyDataAtom projectionAtom)

Methods inherited from class java.lang.Object

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

Constructor Detail

NodeBasedQueryTransformer

protected NodeBasedQueryTransformer(HomogeneousQueryNodeTransformer nodeTransformer)

Method Detail

transform

public IntermediateQuery transform(IntermediateQuery originalQuery)

Specified by:

transform in interface QueryTransformer

transformProjectionAtom

protected abstract DistinctVariableOnlyDataAtom transformProjectionAtom(DistinctVariableOnlyDataAtom projectionAtom)

convertToBuilderAndTransform

protected IntermediateQueryBuilder convertToBuilderAndTransform(IntermediateQuery originalQuery,
                                                                HomogeneousQueryNodeTransformer nodeTransformer,
                                                                DistinctVariableOnlyDataAtom transformedProjectionAtom)

TODO: explain

TODO: avoid the use of a recursive method. Use a stack instead.