org.basex.query.expr
Class Catch
java.lang.Object
org.basex.query.ExprInfo
org.basex.query.expr.Expr
org.basex.query.expr.Single
org.basex.query.expr.Catch
public final class Catch
- extends Single
Catch clause.
- Author:
- Workgroup DBIS, University of Konstanz 2005-10, ISC License, Christian Gruen
Nested classes/interfaces inherited from class org.basex.query.expr.Expr |
Expr.Use |
Fields inherited from class org.basex.query.expr.Single |
expr |
Methods inherited from class org.basex.query.expr.Single |
plan |
Methods inherited from class org.basex.query.expr.Expr |
addText, atomic, checkCtx, checkDbl, checkItr, duplicates, e, ebv, i, indexAccessible, indexEquivalent, iter, removable, returned, sameAs, size, test, v |
Catch
public Catch(Expr ct,
QNm[] c,
Var... v)
- Constructor.
- Parameters:
ct
- catch expressionc
- supported error codesv
- variables
comp
public Catch comp(QueryContext ctx)
throws QueryException
- Description copied from class:
Expr
- Optimizes and compiles the expression.
- Overrides:
comp
in class Single
- Parameters:
ctx
- query context
- Returns:
- optimized Expression
- Throws:
QueryException
- query exception
iter
public Iter iter(QueryContext ctx,
QueryException ex)
throws QueryException
- Catch iterator.
- Parameters:
ctx
- query contextex
- thrown exception
- Returns:
- resulting item
- Throws:
QueryException
- query exception
uses
public boolean uses(Expr.Use u,
QueryContext ctx)
- Description copied from class:
Expr
- Indicates if an expression uses the specified type.
Called by the compiler to perform certain optimizations.
true
is returned by default and thus assumed as "worst-case".
- Overrides:
uses
in class Single
- Parameters:
u
- use type to be checkedctx
- query context
- Returns:
- result of check
remove
public Expr remove(Var v)
- Description copied from class:
Expr
- Removes the specified variable in a sub expression.
- Overrides:
remove
in class Single
- Parameters:
v
- variable to be removed
- Returns:
- expression with removed variable
toString
public String toString()
- Specified by:
toString
in class ExprInfo