ConstraintStage

Overview

Package

Class

Use

Deprecated

Index

Home >> All >> com >> hp >> hpl >> jena >> graph >> [ query overview ]

PREV CLASS NEXT CLASS

SUMMARY:

JAVADOC |

Sourc code of com.hp.hpl.jena.graph.query.ConstraintStage

SOURCE |

Download com.hp.hpl.jena.graph.query.ConstraintStage

DOWNLOAD | NESTED | FIELD | CONSTR | METHOD

DETAIL: FIELD | CONSTR | METHOD

com.hp.hpl.jena.graph.query
Class ConstraintStage

java.lang.Object
  com.hp.hpl.jena.graph.query.Stage
      com.hp.hpl.jena.graph.query.ConstraintStage

public class ConstraintStage
extends Stage

A ConstraintStage implements the constraint evaluation part of a query. Any constraints not handled by previous PatternStages are prepared against the mapping and valuated against each binding that comes down the pipe; only bindings that evaluate to true are passed onward.

Field Summary

protected ValuatorSet prepared
          The set of prepared Valuators representing the constraint.

Fields inherited from class com.hp.hpl.jena.graph.query.Stage

previous, stillOpen

Constructor Summary

ConstraintStage(Mapping map, ExpressionSet constraint)
          Initialise this ConstraintStage with the mapping [from names to indexes] and ExpressionSet [the constraint expressions] that will be evaluated when the constraint stage runs.

Method Summary

Pipe deliver(Pipe L)
          the delivery component: read the domain elements out of the input pipe, and only pass on those that satisfy the predicate.

private boolean evalConstraint(Domain d, ValuatorSet e)
          Evaluate the prepared constraints with the values given by the domain.

Methods inherited from class com.hp.hpl.jena.graph.query.Stage

close, connectFrom, initial, isClosed, markClosed

Methods inherited from class java.lang.Object

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

Field Detail

prepared

protected ValuatorSet prepared

The set of prepared Valuators representing the constraint.

Constructor Detail