Package org.aksw.jena_sparql_api.algebra.transform

Class TransformEvalTable

java.lang.Object

org.apache.jena.sparql.algebra.TransformCopy

org.aksw.jenax.arq.util.query.TransformCopyAdapter

org.aksw.jena_sparql_api.algebra.transform.TransformEvalTable

All Implemented Interfaces:

org.apache.jena.sparql.algebra.Transform

public class TransformEvalTable
extends TransformCopyAdapter

A transformer that evaluates every op whose sub ops are all OpTable instances to another OpTable instance. Note, that this mechanism materializes every intermediate result as a table. A more efficient approach may be to evaluate sub-expressions of an op using an OpExecutor and substituting the roots of these sub-expressions in op with the obtained results.

Author:

raven

Nested Class Summary

Nested classes/interfaces inherited from class org.aksw.jenax.arq.util.query.TransformCopyAdapter

TransformCopyAdapter.TriFunction<A extends Object,B extends Object,C extends Object,R extends Object>

Field Summary

Fields

Modifier and Type	Field	Description
protected org.apache.jena.sparql.engine.ExecutionContext	execCxt
protected org.apache.jena.sparql.engine.main.OpExecutor	opExecutor

Fields inherited from class org.apache.jena.sparql.algebra.TransformCopy

COPY_ALWAYS, COPY_ONLY_ON_CHANGE

Constructor Summary

Constructors

Constructor	Description
TransformEvalTable(org.apache.jena.sparql.engine.main.OpExecutor opExecutor, org.apache.jena.sparql.engine.ExecutionContext execCxt)

Method Summary

Modifier and Type	Method	Description
static TransformEvalTable	create()
static org.apache.jena.sparql.engine.ExecutionContext	createExecCxt(org.apache.jena.sparql.engine.main.OpExecutorFactory opExecutorFactory)
org.apache.jena.sparql.algebra.op.OpTable	exec(org.apache.jena.sparql.algebra.Op op)
protected <OP1 extends org.apache.jena.sparql.algebra.op.Op1> org.apache.jena.sparql.algebra.Op	transformOp1(OP1 op, org.apache.jena.sparql.algebra.Op subOp, BiFunction<? super OP1,? super org.apache.jena.sparql.algebra.Op,? extends org.apache.jena.sparql.algebra.Op> fallback)
protected <OP2 extends org.apache.jena.sparql.algebra.op.Op2> org.apache.jena.sparql.algebra.Op	transformOp2(OP2 op, org.apache.jena.sparql.algebra.Op left, org.apache.jena.sparql.algebra.Op right, TransformCopyAdapter.TriFunction<? super OP2,? super org.apache.jena.sparql.algebra.Op,? super org.apache.jena.sparql.algebra.Op,? extends org.apache.jena.sparql.algebra.Op> fallback)
protected <OPN extends org.apache.jena.sparql.algebra.op.OpN> org.apache.jena.sparql.algebra.Op	transformOpN(OPN op, List<org.apache.jena.sparql.algebra.Op> subOps, BiFunction<? super OPN,? super List<org.apache.jena.sparql.algebra.Op>,? extends org.apache.jena.sparql.algebra.Op> fallback)

Methods inherited from class org.aksw.jenax.arq.util.query.TransformCopyAdapter

transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transformOp0, transformOpExt

Methods inherited from class org.apache.jena.sparql.algebra.TransformCopy

transform, transform, transform, transform, transform, transform, transform, transform, transform

Methods inherited from class java.lang.Object

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

Field Details

opExecutor

protected org.apache.jena.sparql.engine.main.OpExecutor opExecutor

execCxt

protected org.apache.jena.sparql.engine.ExecutionContext execCxt

Constructor Details

TransformEvalTable

public TransformEvalTable(org.apache.jena.sparql.engine.main.OpExecutor opExecutor,
 org.apache.jena.sparql.engine.ExecutionContext execCxt)

Method Details

create

public static TransformEvalTable create()

createExecCxt

public static org.apache.jena.sparql.engine.ExecutionContext createExecCxt(org.apache.jena.sparql.engine.main.OpExecutorFactory opExecutorFactory)

exec

public org.apache.jena.sparql.algebra.op.OpTable exec(org.apache.jena.sparql.algebra.Op op)

transformOpN

protected <OPN extends org.apache.jena.sparql.algebra.op.OpN>
org.apache.jena.sparql.algebra.Op transformOpN(OPN op,
 List<org.apache.jena.sparql.algebra.Op> subOps,
 BiFunction<? super OPN,? super List<org.apache.jena.sparql.algebra.Op>,? extends org.apache.jena.sparql.algebra.Op> fallback)

Overrides:

transformOpN in class TransformCopyAdapter

transformOp2

protected <OP2 extends org.apache.jena.sparql.algebra.op.Op2>
org.apache.jena.sparql.algebra.Op transformOp2(OP2 op,
 org.apache.jena.sparql.algebra.Op left,
 org.apache.jena.sparql.algebra.Op right,
 TransformCopyAdapter.TriFunction<? super OP2,? super org.apache.jena.sparql.algebra.Op,? super org.apache.jena.sparql.algebra.Op,? extends org.apache.jena.sparql.algebra.Op> fallback)

Overrides:

transformOp2 in class TransformCopyAdapter

transformOp1

protected <OP1 extends org.apache.jena.sparql.algebra.op.Op1>
org.apache.jena.sparql.algebra.Op transformOp1(OP1 op,
 org.apache.jena.sparql.algebra.Op subOp,
 BiFunction<? super OP1,? super org.apache.jena.sparql.algebra.Op,? extends org.apache.jena.sparql.algebra.Op> fallback)

Overrides:

transformOp1 in class TransformCopyAdapter