org.basex.query.func
Class FNBaseX

java.lang.Object
  org.basex.query.ExprInfo
      org.basex.query.expr.Expr
          org.basex.query.expr.Arr
              org.basex.query.func.Fun
                  org.basex.query.func.FNBaseX

public final class FNBaseX
extends Fun

Project specific functions.

Author:

Workgroup DBIS, University of Konstanz 2005-10, ISC License, Christian Gruen

Nested Class Summary

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

Expr.Use

Field Summary

Fields inherited from class org.basex.query.func.Fun

func

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

expr

Constructor Summary

FNBaseX()

Method Summary

Item	atomic(QueryContext ctx) Evaluates the expression and returns the resulting item or a null reference.
Expr	c(QueryContext ctx) Compiles the function.
Iter	iter(QueryContext ctx) Evaluates the expression and returns an iterator on the resulting items.

Methods inherited from class org.basex.query.func.Fun

comp, info, init, plan, returned, toString

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

duplicates, indexEquivalent, removable, remove, uses

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

addText, checkCtx, checkDbl, checkItr, e, ebv, i, indexAccessible, sameAs, size, test, v

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

FNBaseX

public FNBaseX()

Method Detail

iter

public Iter iter(QueryContext ctx)
          throws QueryException

Description copied from class: Expr

Evaluates the expression and returns an iterator on the resulting items. If this method is not overwritten, Expr.atomic(org.basex.query.QueryContext) must be implemented.

Overrides:

iter in class Expr

Parameters:

ctx - query context

Returns:

resulting item

Throws:

QueryException - query exception

atomic

public Item atomic(QueryContext ctx)
            throws QueryException

Description copied from class: Expr

Evaluates the expression and returns the resulting item or a null reference. If this method is not overwritten, Expr.iter(org.basex.query.QueryContext) must be implemented.

Overrides:

atomic in class Expr

Parameters:

ctx - query context

Returns:

iterator

Throws:

QueryException - query exception

c

public Expr c(QueryContext ctx)
       throws QueryException

Description copied from class: Fun

Compiles the function.

Overrides:

c in class Fun

Parameters:

ctx - query context

Returns:

evaluated item

Throws:

QueryException - query exception