org.basex.query.ft
Class FTNot

java.lang.Object
  extended by org.basex.query.ExprInfo
      extended by org.basex.query.expr.Expr
          extended by org.basex.query.ft.FTExpr
              extended by org.basex.query.ft.FTNot

public final class FTNot
extends FTExpr

FTUnaryNot expression.

Author:
Workgroup DBIS, University of Konstanz 2005-10, ISC License, Christian Gruen, Sebastian Gath

Nested Class Summary
 
Nested classes/interfaces inherited from class org.basex.query.expr.Expr
Expr.Use
 
Field Summary
 
Fields inherited from class org.basex.query.ft.FTExpr
expr
 
Constructor Summary
FTNot(FTExpr e)
          Constructor.
 
Method Summary
 FTItem atomic(QueryContext ctx)
          This method is called by the sequential full-text evaluation.
 FTExpr comp(QueryContext ctx)
          Optimizes and compiles the expression.
 boolean indexAccessible(IndexContext ic)
          Checks if an index can be used for query evaluation.
 FTIter iter(QueryContext ctx)
          This method is called by the index-based full-text evaluation.
 String toString()
           
 boolean usesExclude()
          Checks if sub expressions of a mild not operator do not violate the grammar.
 
Methods inherited from class org.basex.query.ft.FTExpr
color, indexEquivalent, plan, removable, remove, returned, uses
 
Methods inherited from class org.basex.query.expr.Expr
addText, checkCtx, checkDbl, checkItr, duplicates, e, ebv, i, sameAs, size, test, v
 
Methods inherited from class org.basex.query.ExprInfo
info, name
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

FTNot

public FTNot(FTExpr e)
Constructor.

Parameters:
e - expression
Method Detail

comp

public FTExpr comp(QueryContext ctx)
            throws QueryException
Description copied from class: Expr
Optimizes and compiles the expression.

Overrides:
comp in class FTExpr
Parameters:
ctx - query context
Returns:
optimized Expression
Throws:
QueryException - query exception

atomic

public FTItem atomic(QueryContext ctx)
              throws QueryException
Description copied from class: FTExpr
This method is called by the sequential full-text evaluation.

Specified by:
atomic in class FTExpr
Parameters:
ctx - query context
Returns:
resulting item
Throws:
QueryException - query exception

iter

public FTIter iter(QueryContext ctx)
            throws QueryException
Description copied from class: FTExpr
This method is called by the index-based full-text evaluation.

Specified by:
iter in class FTExpr
Parameters:
ctx - query context
Returns:
resulting item
Throws:
QueryException - query exception

indexAccessible

public boolean indexAccessible(IndexContext ic)
                        throws QueryException
Description copied from class: Expr
Checks if an index can be used for query evaluation.

Overrides:
indexAccessible in class Expr
Parameters:
ic - index context
Returns:
true if an index can be used
Throws:
QueryException - query exception

usesExclude

public boolean usesExclude()
Description copied from class: FTExpr
Checks if sub expressions of a mild not operator do not violate the grammar.

Returns:
result of check

toString

public String toString()
Specified by:
toString in class ExprInfo