org.basex.query.xquery.expr
Class FLWR

java.lang.Object
  extended by org.basex.query.ExprInfo
      extended by org.basex.query.xquery.expr.Expr
          extended by org.basex.query.xquery.expr.Single
              extended by org.basex.query.xquery.expr.FLWR
Direct Known Subclasses:
FLWOR

public class FLWR
extends Single

FLWR 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
 
Field Summary
 
Fields inherited from class org.basex.query.xquery.expr.Single
expr
 
Constructor Summary
FLWR(ForLet[] f, Expr w, Expr r)
          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.Single
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

FLWR

public FLWR(ForLet[] f,
            Expr w,
            Expr r)
Constructor.

Parameters:
f - variable inputs
w - where clause
r - return expression
Method Detail

comp

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

Overrides:
comp in class Single
Parameters:
ctx - query context
Returns:
optimized Expression
Throws:
XQException - evaluation exception

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

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.

Overrides:
plan in class Single
Parameters:
ser - serializer
Throws:
java.io.IOException - exception

toString

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