Package org.apache.jena.sparql.algebra

Class Transformer

java.lang.Object

org.apache.jena.sparql.algebra.Transformer

public class Transformer
extends java.lang.Object

A bottom-top application of a transformation of SPARQL algebra

Constructor Summary

Constructors

Constructor	Description
Transformer()

Method Summary

Modifier and Type	Method	Description
static Transformer	get()	Get the current transformer
static void	set(Transformer value)	Set the current transformer - use with care
static Op	transform(Transform transform, Op op)	Transform an algebra expression
static Op	transform(Transform transform, Op op, OpVisitor beforeVisitor, OpVisitor afterVisitor)	Transformation with specific Transform and default ExprTransform (apply transform inside pattern expressions like NOT EXISTS)
static Op	transform(Transform transform, ExprTransform exprTransform, Op op)	Transform an algebra expression and the expressions
static Op	transform(Transform transform, ExprTransform exprTransform, Op op, OpVisitor beforeVisitor, OpVisitor afterVisitor)	Transformation with specific Transform and ExprTransform applied
static Op	transformSkipService(Transform transform, Op op)	Transform an algebra expression except skip (leave alone) any OpService nodes
static Op	transformSkipService(Transform transform, ExprTransform exprTransform, Op op)	Transform an algebra expression except skip (leave alone) any OpService nodes
static Op	transformSkipService(Transform opTransform, ExprTransform exprTransform, Op op, OpVisitor beforeVisitor, OpVisitor afterVisitor)	Transform an algebra expression except skip (leave alone) any OpService nodes

Methods inherited from class java.lang.Object

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

Constructor Detail

Transformer

public Transformer()

Method Detail

get

public static Transformer get()

Get the current transformer

set

public static void set(Transformer value)

Set the current transformer - use with care

transform

public static Op transform(Transform transform,
                           Op op)

Transform an algebra expression

transform

public static Op transform(Transform transform,
                           ExprTransform exprTransform,
                           Op op)

Transform an algebra expression and the expressions

transform

public static Op transform(Transform transform,
                           Op op,
                           OpVisitor beforeVisitor,
                           OpVisitor afterVisitor)

Transformation with specific Transform and default ExprTransform (apply transform inside pattern expressions like NOT EXISTS)

transform

public static Op transform(Transform transform,
                           ExprTransform exprTransform,
                           Op op,
                           OpVisitor beforeVisitor,
                           OpVisitor afterVisitor)

Transformation with specific Transform and ExprTransform applied

transformSkipService

public static Op transformSkipService(Transform transform,
                                      Op op)

Transform an algebra expression except skip (leave alone) any OpService nodes

transformSkipService

public static Op transformSkipService(Transform transform,
                                      ExprTransform exprTransform,
                                      Op op)

Transform an algebra expression except skip (leave alone) any OpService nodes

transformSkipService

public static Op transformSkipService(Transform opTransform,
                                      ExprTransform exprTransform,
                                      Op op,
                                      OpVisitor beforeVisitor,
                                      OpVisitor afterVisitor)

Transform an algebra expression except skip (leave alone) any OpService nodes