org.basex.query.func
Class FNSeq

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.FNSeq

public final class FNSeq
extends Fun

Sequence functions.

Author:

Workgroup DBIS, University of Konstanz 2005-09, 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

FNSeq()

Method Summary

Item	atomic(QueryContext ctx) Evaluates the expression and returns the resulting item or a null reference.
static boolean	deep(Iter iter1, Iter iter2) Checks items for deep equality.
Iter	iter(QueryContext ctx) Evaluates the expression and returns an iterator on the resulting items.

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

c, comp, info, 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

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

FNSeq

public FNSeq()

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

deep

public static boolean deep(Iter iter1,
                           Iter iter2)
                    throws QueryException

Checks items for deep equality.

Parameters:

iter1 - first iterator

iter2 - second iterator

Returns:

result of check

Throws:

QueryException - query exception