org.basex.query.gflwor
Class OrderBy.Key

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.expr.Single
                  extended by org.basex.query.gflwor.OrderBy.Key
Enclosing class:
OrderBy

public static class OrderBy.Key
extends Single

Sort key.

Author:
BaseX Team 2005-12, BSD License, Leo Woerteler

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.expr.Single
expr
 
Fields inherited from class org.basex.query.expr.ParseExpr
info, size, type
 
Constructor Summary
OrderBy.Key(InputInfo ii, Expr k, boolean dsc, boolean lst, Collation cl)
          Constructor.
 
Method Summary
 OrderBy.Key copy(QueryContext ctx, VarScope scp, IntObjMap<Var> vs)
          Copies an expression.
 int exprSize()
          Counts the number of expressions in this expression's sub-tree.
 void plan(FElem plan)
          Creates an expression tree.
 java.lang.String toString()
           
 
Methods inherited from class org.basex.query.expr.Single
accept, checkUp, compile, count, has, inline, 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, item, iter, optPre, preEval, size, test, type, value
 
Methods inherited from class org.basex.query.expr.Expr
addText, compEbv, copy, hasFreeVars, indexAccessible, indexEquivalent, inlineAll, isEmpty, isFunction, isItem, isVacuous, isValue, iterable, markTailCalls, optimize, 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

OrderBy.Key

public OrderBy.Key(InputInfo ii,
                   Expr k,
                   boolean dsc,
                   boolean lst,
                   Collation cl)
Constructor.

Parameters:
ii - input info
k - sort key expression
dsc - descending order
lst - empty least
cl - collation
Method Detail

copy

public OrderBy.Key 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 Expr
Parameters:
ctx - query context
scp - variable scope for creating new variables
vs - mapping from old variable IDs to new variable copies
Returns:
copied expression

plan

public void plan(FElem plan)
Description copied from class: ExprInfo
Creates an expression tree.

Overrides:
plan in class Single
Parameters:
plan - root element

toString

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

exprSize

public int exprSize()
Description copied from class: Expr
Counts the number of expressions in this expression's sub-tree.

Overrides:
exprSize in class Single
Returns:
number of expressions