Uses of Interface
org.apache.jena.sparql.algebra.Transform

Packages that use Transform

Package	Description
org.apache.jena.sparql.algebra
org.apache.jena.sparql.algebra.op
org.apache.jena.sparql.algebra.optimize
org.apache.jena.sparql.algebra.walker
org.apache.jena.sparql.engine.iterator

Uses of Transform in org.apache.jena.sparql.algebra

Classes in org.apache.jena.sparql.algebra that implement Transform

Modifier and Type	Class	Description
class	TransformCopy	One step in the transformation process.
class	TransformGraphRename	Rename quad form alegbra
class	TransformQuadBlockGraph	Transform that rewrites an algebra into quadblock form
class	TransformQuadGraph	Transform that rewrites an algebra into quad form
class	TransformSingle	Special purpose base class for a single transformation.
class	TransformUnionQuery	Convert query in algebra form so that the default graph of the query is the union of named graphs
class	TransformWrapper	Wrap another transform and pass on the transform operation

Methods in org.apache.jena.sparql.algebra with parameters of type Transform

Modifier and Type	Method	Description
static Op	Transformer.transform(Transform transform, Op op)	Transform an algebra expression
static Op	Transformer.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	Transformer.transform(Transform transform, ExprTransform exprTransform, Op op)	Transform an algebra expression and the expressions
static Op	Transformer.transform(Transform transform, ExprTransform exprTransform, Op op, OpVisitor beforeVisitor, OpVisitor afterVisitor)	Transformation with specific Transform and ExprTransform applied
static Op	Transformer.transformSkipService(Transform transform, Op op)	Transform an algebra expression except skip (leave alone) any OpService nodes
static Op	Transformer.transformSkipService(Transform transform, ExprTransform exprTransform, Op op)	Transform an algebra expression except skip (leave alone) any OpService nodes
static Op	Transformer.transformSkipService(Transform opTransform, ExprTransform exprTransform, Op op, OpVisitor beforeVisitor, OpVisitor afterVisitor)	Transform an algebra expression except skip (leave alone) any OpService nodes

Constructors in org.apache.jena.sparql.algebra with parameters of type Transform

Modifier	Constructor	Description
	TransformWrapper(Transform transform)

Uses of Transform in org.apache.jena.sparql.algebra.op

Methods in org.apache.jena.sparql.algebra.op with parameters of type Transform

Modifier and Type	Method	Description
abstract Op	Op0.apply(Transform transform)
abstract Op	Op1.apply(Transform transform, Op subOp)
abstract Op	Op2.apply(Transform transform, Op left, Op right)
Op	OpAntiJoin.apply(Transform transform, Op left, Op right)
Op	OpAssign.apply(Transform transform, Op subOp)
Op	OpBGP.apply(Transform transform)
Op	OpConditional.apply(Transform transform, Op left, Op right)
Op	OpDatasetNames.apply(Transform transform)
Op	OpDisjunction.apply(Transform transform, List<Op> elts)
Op	OpDistinct.apply(Transform transform, Op subOp)
Op	OpExt.apply(Transform transform)
Op	OpExt.apply(Transform transform, OpVisitor before, OpVisitor after)
Op	OpExtend.apply(Transform transform, Op subOp)
Op	OpFilter.apply(Transform transform, Op subOp)
Op	OpGraph.apply(Transform transform, Op op)
Op	OpGroup.apply(Transform transform, Op subOp)
Op	OpJoin.apply(Transform transform, Op left, Op right)
Op	OpLabel.apply(Transform transform, Op subOp)
Op	OpLateral.apply(Transform transform, Op left, Op right)
Op	OpLeftJoin.apply(Transform transform, Op left, Op right)
Op	OpList.apply(Transform transform, Op subOp)
Op	OpMinus.apply(Transform transform, Op left, Op right)
abstract Op	OpN.apply(Transform transform, List<Op> elts)
Op	OpNull.apply(Transform transform)
Op	OpOrder.apply(Transform transform, Op subOp)
Op	OpPath.apply(Transform transform)
Op	OpProcedure.apply(Transform transform, Op subOp)
Op	OpProject.apply(Transform transform, Op subOp)
Op	OpPropFunc.apply(Transform transform, Op subOp)
Op	OpQuad.apply(Transform transform)
Op	OpQuadBlock.apply(Transform transform)
Op	OpQuadPattern.apply(Transform transform)
Op	OpReduced.apply(Transform transform, Op subOp)
Op	OpSemiJoin.apply(Transform transform, Op left, Op right)
Op	OpSequence.apply(Transform transform, List<Op> elts)
Op	OpService.apply(Transform transform, Op subOp)
Op	OpSlice.apply(Transform transform, Op subOp)
Op	OpTable.apply(Transform transform)
Op	OpTopN.apply(Transform transform, Op subOp)
Op	OpTriple.apply(Transform transform)
Op	OpUnfold.apply(Transform transform, Op subOp)
Op	OpUnion.apply(Transform transform, Op left, Op right)

Uses of Transform in org.apache.jena.sparql.algebra.optimize

Classes in org.apache.jena.sparql.algebra.optimize that implement Transform

Modifier and Type	Class	Description
class	TransformDistinctToReduced	Transforms generic DISTINCT plus ORDER BY combinations to REDUCED plus ORDER BY which typically gives better performance and memory consumption because engines have to keep less data in-memory to evaluate it.
class	TransformEliminateAssignments	A transform that tries to in-line/eliminate assignments
class	TransformExpandOneOf
class	TransformExtendCombine	An optimizer that aims to combine multiple extend clauses together.
class	TransformFilterConjunction	Redo FILTER (A&&B) as FILTER(A) FILTER(B) (as an expr list).
class	TransformFilterDisjunction	Filter disjunction.
class	TransformFilterEquality	A transform that aims to optimize queries where there is an equality constraint on a variable to speed up evaluation e.g
class	TransformFilterImplicitJoin	Optimizer for transforming implicit joins.
class	TransformFilterInequality	A transform that aims to optimize queries where there is an inequality constraint on a variable in an attempt to speed up evaluation e.g
class	TransformFilterPlacement	Rewrite an algebra expression to put filters as close to their bound variables.
class	TransformFilterPlacementConservative	Rewrite an algebra expression to put filters as close to their bound variables in a BGP.
class	TransformImplicitLeftJoin	Optimizer for transforming implicit joins.
class	TransformJoinStrategy	Choose join strategy
class	TransformMergeBGPs	Merge BGPs, additionally merges the special OpTriple operator which is a BGP of a single triple pattern that may be introduced by other transforms (join BGP1 BGP2) => BGP (sequence ...BGP1 BGP2 ...)
class	TransformOrderByDistinctApplication	Improved optimization for ORDER BY plus DISTINCT or REDUCED combinations, see JENA-441 for original proposal and discussion.
class	TransformPathFlatten	Perform the equivalent of the transactions in the SPARQL 1.1 spec.
class	TransformPathFlattenAlgebra	The path transformation step mostly per the SPARQL 1.1 spec with some enhancement e.g. expanding alternative paths into unions.
class	TransformPattern2Join	Expand basic graph patterns and quad patterns to joins of (triple) and (quad).
class	TransformPromoteTableEmpty	Optimizer that ensures that table empty is promoted as high up a query as is possible
class	TransformPropertyFunction	Rewrite to replace a property function property with the call to the property function implementation
class	TransformRemoveAssignment	A transform capable of removing assignments from the algebra tree
class	TransformRemoveLabels
class	TransformReorder	A Transformer that applies a reordering to all BGPs and Quad Patterns present in the algebra
class	TransformSimplify
class	TransformTopN	Optimization that changes queries that uses OFFSET/LIMIT and ORDER BY to execute using Top N: i.e. while executing, keep only the top N items seen.

Methods in org.apache.jena.sparql.algebra.optimize with parameters of type Transform

Modifier and Type	Method	Description
static Op	Optimize.apply(Transform transform, Op op)	Apply a Transform to an Op
static Op	OptimizerStd.apply(String label, Transform transform, Op op)
static Op	OptimizerStd.apply(Transform transform, Op op)

Constructors in org.apache.jena.sparql.algebra.optimize with parameters of type Transform

Modifier	Constructor	Description
	ExprTransformApplyTransform(Transform transform)
	ExprTransformApplyTransform(Transform transform, OpVisitor beforeVisitor, OpVisitor afterVisitor)

Uses of Transform in org.apache.jena.sparql.algebra.walker

Methods in org.apache.jena.sparql.algebra.walker with parameters of type Transform

Modifier and Type	Method	Description
static ApplyTransformVisitor	Walker.createTransformer(Transform opTransform, ExprTransform exprTransform)
static ApplyTransformVisitor	Walker.createTransformer(Transform opTransform, ExprTransform exprTransform, OpVisitor beforeVisitor, OpVisitor afterVisitor)
static Op	Walker.transform(Op op, Transform transform)	Transform an algebra expression
static Op	Walker.transform(Op op, Transform opTransform, ExprTransform exprTransform)	Transform an Op.
static Op	Walker.transform(Op op, Transform opTransform, ExprTransform exprTransform, OpVisitor beforeVisitor, OpVisitor afterVisitor)	Transform an Op.
static Expr	Walker.transform(Expr expr, Transform opTransform, ExprTransform exprTransform)	Transform an Expr.
static Expr	Walker.transform(Expr expr, Transform opTransform, ExprTransform exprTransform, OpVisitor beforeVisitor, OpVisitor afterVisitor)	Transform an Expr.

Constructors in org.apache.jena.sparql.algebra.walker with parameters of type Transform

Modifier	Constructor	Description
	ApplyTransformVisitor(Transform opTransform, ExprTransform exprTransform, boolean visitService, OpVisitor before, OpVisitor after)

Uses of Transform in org.apache.jena.sparql.engine.iterator

Classes in org.apache.jena.sparql.engine.iterator that implement Transform

Modifier and Type	Class	Description
static class	QueryIterLateral.TransformInject