org.basex.query.xquery.expr
Class Union

java.lang.Object
  extended by org.basex.query.ExprInfo
      extended by org.basex.query.xquery.expr.Expr
          extended by org.basex.query.xquery.expr.Arr
              extended by org.basex.query.xquery.expr.Union

public final class Union
extends Arr

Union Expression.

Author:
Workgroup DBIS, University of Konstanz 2005-08, ISC License, Christian Gruen

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
Union(Expr[] e)
          Constructor.
 
Method Summary
 Iter iter(XQContext ctx)
          Evaluates the expression and returns an iterator on the resulting items.
 java.lang.String toString()
           
 
Methods inherited from class org.basex.query.xquery.expr.Arr
comp, plan, returned, uses
 
Methods inherited from class org.basex.query.xquery.expr.Expr
e, i
 
Methods inherited from class org.basex.query.ExprInfo
color, info, name
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

Union

public Union(Expr[] e)
Constructor.

Parameters:
e - expression list
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.

Specified by:
iter in class Expr
Parameters:
ctx - query context
Returns:
resulting item
Throws:
XQException - evaluation exception

toString

public java.lang.String toString()
Specified by:
toString in class ExprInfo