org.basex.query.xquery.expr
Class Try

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.Try

public final class Try
extends Arr

Project specific try/catch 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
Try(Expr tr, Expr ct, Var v1, Var v2)
          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.
 java.lang.String toString()
           
 
Methods inherited from class org.basex.query.xquery.expr.Arr
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

Try

public Try(Expr tr,
           Expr ct,
           Var v1,
           Var v2)
Constructor.

Parameters:
tr - try expression
ct - catch expression
v1 - first variable
v2 - second variable
Method Detail

comp

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

Overrides:
comp in class Arr
Parameters:
ctx - query context
Returns:
optimized Expression

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