org.basex.query.xquery.expr
Class For

java.lang.Object
  extended by org.basex.query.ExprInfo
      extended by org.basex.query.xquery.expr.Expr
          extended by org.basex.query.xquery.expr.ForLet
              extended by org.basex.query.xquery.expr.For

public final class For
extends ForLet

For Clause.

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
 
Constructor Summary
For(Expr e, Var v, Var p, Var s)
          Constructor.
 
Method Summary
 Expr comp(XQContext ctx)
          Optimizes and compiles the expression.
 Iter iter(XQContext ctx)
          Evaluates the expression and returns an iterator on the resulting items.
 void plan(Serializer ser)
          Recursively sends the abstract syntax of this expression to the specified serializer.
 java.lang.String toString()
           
 
Methods inherited from class org.basex.query.xquery.expr.Expr
e, i, returned, uses
 
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

For

public For(Expr e,
           Var v,
           Var p,
           Var s)
    throws XQException
Constructor.

Parameters:
e - variable input
v - variable
p - positional variable
s - score variable
Throws:
XQException - xquery exception
Method Detail

comp

public Expr comp(XQContext ctx)
          throws XQException
Description copied from class: Expr
Optimizes and compiles the expression.

Specified by:
comp in class Expr
Parameters:
ctx - query context
Returns:
optimized Expression
Throws:
XQException - evaluation exception

iter

public Iter iter(XQContext ctx)
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

toString

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

plan

public void plan(Serializer ser)
          throws java.io.IOException
Description copied from class: ExprInfo
Recursively sends the abstract syntax of this expression to the specified serializer.

Specified by:
plan in class ExprInfo
Parameters:
ser - serializer
Throws:
java.io.IOException - exception