com.hp.hpl.jena.sparql.procedure

Interface Procedure

All Superinterfaces:

Printable, PrintSerializable

All Known Implementing Classes:

debug, ProcedureBase, ProcedureEval, ProcedurePF

public interface Procedure
extends PrintSerializable

Method Summary

Methods

Modifier and Type	Method and Description
void	build(Node procId, ExprList args, ExecutionContext execCxt) Called during query plan construction immediately after the construction of the property function instance.
QueryIterator	proc(QueryIterator input, ExecutionContext execCxt) Call the procedure, with an input iterator of bindings.

Methods inherited from interface com.hp.hpl.jena.sparql.util.PrintSerializable

output, toString

Methods inherited from interface org.apache.jena.atlas.io.Printable

output

Method Detail

build

void build(Node procId,
         ExprList args,
         ExecutionContext execCxt)

Called during query plan construction immediately after the construction of the property function instance.

Parameters:

procId - The procedure identifier (usually a URI)

args - The argument list (unevaluated expressions)

execCxt - Execution context

proc

QueryIterator proc(QueryIterator input,
                 ExecutionContext execCxt)

Call the procedure, with an input iterator of bindings. Implementations can inherit from the convenience form ProcEval which calls repeated for each binding.

Parameters:

input - QueryIterator from the previous stage

execCxt - The execution context

Returns:

QueryIterator