org.basex.query.xpath.expr
Class Clc

java.lang.Object
  extended by org.basex.query.ExprInfo
      extended by org.basex.query.xpath.expr.Expr
          extended by org.basex.query.xpath.expr.Arr
              extended by org.basex.query.xpath.expr.Clc

public final class Clc
extends Arr

Calculation.

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

Field Summary
 Calc calc
          Calculation operator.
 
Fields inherited from class org.basex.query.xpath.expr.Arr
expr
 
Constructor Summary
Clc(Expr e1, Expr e2, Calc c)
          Constructor.
 
Method Summary
 Expr comp(XPContext ctx)
          Optimizes the expression.
 Dbl eval(XPContext ctx)
          Evaluates the expression with the specified context set.
 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.xpath.expr.Arr
sameAs, usesPos, usesSize
 
Methods inherited from class org.basex.query.xpath.expr.Expr
indexEquivalent, indexSizes, returnedValue
 
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
 

Field Detail

calc

public final Calc calc
Calculation operator.

Constructor Detail

Clc

public Clc(Expr e1,
           Expr e2,
           Calc c)
Constructor.

Parameters:
e1 - first expression
e2 - second expression
c - calculation type
Method Detail

comp

public Expr comp(XPContext ctx)
          throws QueryException
Description copied from class: Expr
Optimizes the expression.

Overrides:
comp in class Arr
Parameters:
ctx - expression context
Returns:
optimized Expression
Throws:
QueryException - evaluation exception

eval

public Dbl eval(XPContext ctx)
         throws QueryException
Description copied from class: Expr
Evaluates the expression with the specified context set. Additionally provides a context

Specified by:
eval in class Expr
Parameters:
ctx - query context
Returns:
resulting XPathValue
Throws:
QueryException - evaluation exception

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.

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