org.basex.query.xquery.expr
Class PredIter

java.lang.Object
  org.basex.query.ExprInfo
      org.basex.query.xquery.expr.Expr
          org.basex.query.xquery.expr.Arr
              org.basex.query.xquery.expr.Pred
                  org.basex.query.xquery.expr.PredIter

public final class PredIter
extends Pred

Predicate expression. Mustn't be called with more than one predicate.

Author:

Workgroup DBIS, University of Konstanz 2005-08, ISC License, Dennis Stratmann

Nested Class Summary

Nested classes/interfaces inherited from class org.basex.query.xquery.expr.Expr

Expr.Return, Expr.Using

Field Summary

Fields inherited from class org.basex.query.xquery.expr.Arr

expr

Constructor Summary

PredIter(Expr r, Expr[] e, boolean last, boolean num)
Constructor.

Method Summary

Iter	iter(XQContext ctx) Evaluates the expression and returns an iterator on the resulting items.

Methods inherited from class org.basex.query.xquery.expr.Pred

comp, info, plan, toString, uses

Methods inherited from class org.basex.query.xquery.expr.Arr

returned

Methods inherited from class org.basex.query.xquery.expr.Expr

e, i

Methods inherited from class org.basex.query.ExprInfo

color, name

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

PredIter

public PredIter(Expr r,
                Expr[] e,
                boolean last,
                boolean num)

Constructor.

Parameters:

r - Root Expression

e - Expression List

last - lastFlag is true if predicate has a last function

num - numberFlag is true if predicate has a numeric value

Method Detail

iter

public Iter iter(XQContext ctx)
          throws XQException

Description copied from class: Expr

Evaluates the expression and returns an iterator on the resulting items.

Overrides:

iter in class Pred

Parameters:

ctx - query context

Returns:

resulting item

Throws:

XQException - evaluation exception