org.basex.query.ft
Class FTNot

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

public final class FTNot
extends FTExpr

FTUnaryNot expression.

Author:
BaseX Team 2005-12, BSD License, Christian Gruen, Sebastian Gath

Nested Class Summary
 
Nested classes/interfaces inherited from class org.basex.query.expr.Expr
Expr.Flag
 
Field Summary
 
Fields inherited from class org.basex.query.ft.FTExpr
expr
 
Fields inherited from class org.basex.query.expr.ParseExpr
info, size, type
 
Constructor Summary
FTNot(InputInfo ii, FTExpr e)
          Constructor.
 
Method Summary
 FTExpr compile(QueryContext ctx, VarScope scp)
          Compiles and optimizes the expression, assigns data types and cardinalities.
 FTExpr copy(QueryContext ctx, VarScope scp, IntObjMap<Var> vs)
          Copies an expression.
 boolean indexAccessible(IndexCosts ic)
          Checks if an expression can be rewritten to an index access.
 FTNode item(QueryContext ctx, InputInfo ii)
          This method is called by the sequential full-text evaluation.
 FTIter iter(QueryContext ctx)
          This method is called by the index-based full-text evaluation.
 java.lang.String toString()
           
 boolean usesExclude()
          Checks if sub expressions of a mild not operator violate the grammar.
 
Methods inherited from class org.basex.query.ft.FTExpr
accept, checkUp, count, exprSize, has, indexEquivalent, inline, optimize, plan, removable
 
Methods inherited from class org.basex.query.expr.ParseExpr
checkAdmin, checkAllUp, checkBinary, checkBln, checkColl, checkCreate, checkCtx, checkDbl, checkDBNode, checkEStr, checkEStr, checkFunc, checkItem, checkItr, checkItr, checkMap, checkNode, checkNode, checkNode, checkNoEmpty, checkNoneUp, checkNoUp, checkQNm, checkStr, checkStr, checkStrBin, checkType, checkWrite, compBln, copyType, ebv, optPre, preEval, size, test, type, value
 
Methods inherited from class org.basex.query.expr.Expr
addText, compEbv, copy, hasFreeVars, inlineAll, isEmpty, isFunction, isItem, isVacuous, isValue, iterable, markTailCalls, sameAs, uses, visitAll
 
Methods inherited from class org.basex.data.ExprInfo
addPlan, addPlan, description, info, planAttr, planElem
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

FTNot

public FTNot(InputInfo ii,
             FTExpr e)
Constructor.

Parameters:
ii - input info
e - expression
Method Detail

compile

public FTExpr compile(QueryContext ctx,
                      VarScope scp)
               throws QueryException
Description copied from class: Expr
Compiles and optimizes the expression, assigns data types and cardinalities.

Overrides:
compile in class FTExpr
Parameters:
ctx - query context
scp - variable scope
Returns:
optimized expression
Throws:
QueryException - query exception

item

public FTNode item(QueryContext ctx,
                   InputInfo ii)
            throws QueryException
Description copied from class: FTExpr
This method is called by the sequential full-text evaluation.

Specified by:
item in class FTExpr
Parameters:
ctx - query context
ii - input info
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(IndexCosts ic)
                        throws QueryException
Description copied from class: Expr
Checks if an expression can be rewritten to an index access. If this method is implemented, Expr.indexEquivalent(org.basex.query.util.IndexCosts) must be implemented as well.

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

copy

public FTExpr copy(QueryContext ctx,
                   VarScope scp,
                   IntObjMap<Var> vs)
Description copied from class: Expr
Copies an expression. Will be useful for inlining functions, or for copying static queries.

Specified by:
copy in class FTExpr
Parameters:
ctx - query context
scp - variable scope for creating new variables
vs - mapping from old variable IDs to new variable copies
Returns:
copied expression

usesExclude

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

Returns:
result of check

toString

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