OpJoin (Apache Jena ARQ)

java.lang.Object

org.apache.jena.sparql.util.PrintSerializableBase

org.apache.jena.sparql.algebra.op.OpBase

org.apache.jena.sparql.algebra.op.Op2

org.apache.jena.sparql.algebra.op.OpJoin

All Implemented Interfaces:: org.apache.jena.atlas.io.Printable, Op, Named, PrintSerializable

public class OpJoin extends Op2

Method Summary

Modifier and Type

Method

Description

Op

apply(Transform transform, Op left, Op right)

Op2

copy(Op newLeft, Op newRight)

static Op

create(Op left, Op right)

Create join - an argument of null is simply dropped so Join.create(null, op) is op and Join.create(op,null) is op.

static Op

createReduce(Op left, Op right)

Create join, removing any joins with the identity table and any nulls.

boolean

equalTo(Op op2, NodeIsomorphismMap labelMap)

String

getName()

static boolean

isJoinIdentify(Op op)

void

visit(OpVisitor opVisitor)

Methods inherited from class org.apache.jena.sparql.algebra.op.Op2
getLeft, getRight, hashCode

Methods inherited from class org.apache.jena.sparql.algebra.op.OpBase
equals, output, output

Methods inherited from class org.apache.jena.sparql.util.PrintSerializableBase
toString, toString

Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.jena.sparql.util.PrintSerializable
toString

Method Details
- create
  
  public static Op create(Op left, Op right)
  
  Create join - an argument of null is simply dropped so Join.create(null, op) is op and Join.create(op,null) is op.
- createReduce
  
  public static Op createReduce(Op left, Op right)
  
  Create join, removing any joins with the identity table and any nulls.
  Join.create(null, op) is op.
  Join.create(op, null) is op.
  Join.create(TableUnit, op) is op.
  Join.create(op, TableUnit) is op.
- isJoinIdentify
  
  public static boolean isJoinIdentify(Op op)
- getName
  
  public String getName()
- apply
  
  public Op apply(Transform transform, Op left, Op right)
  
  Specified by:
  
  apply in class Op2
- visit
  
  public void visit(OpVisitor opVisitor)
- copy
  
  public Op2 copy(Op newLeft, Op newRight)
  
  Specified by:
  
  copy in class Op2
- equalTo
  
  public boolean equalTo(Op op2, NodeIsomorphismMap labelMap)
  
  Specified by:
  
  equalTo in interface Op
  
  Specified by:
  
  equalTo in class OpBase