org.basex.query.expr
Class RangeAccess

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.Simple
                  extended by org.basex.query.expr.IndexAccess
                      extended by org.basex.query.expr.RangeAccess

public final class RangeAccess
extends IndexAccess

This index class retrieves range values from the index.

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

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.ParseExpr
info, size, type
 
Method Summary
 Expr copy(QueryContext ctx, VarScope scp, IntObjMap<Var> vs)
          Copies an expression.
 AxisIter iter(QueryContext ctx)
          Evaluates the expression and returns an iterator on the resulting items.
 void plan(FElem plan)
          Creates an expression tree.
 java.lang.String toString()
           
 
Methods inherited from class org.basex.query.expr.IndexAccess
iterable
 
Methods inherited from class org.basex.query.expr.Simple
accept, checkUp, compile, count, exprSize, 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, 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, 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
 

Method Detail

iter

public AxisIter iter(QueryContext ctx)
Description copied from class: Expr
Evaluates the expression and returns an iterator on the resulting items. If this method is not overwritten, Expr.item(org.basex.query.QueryContext, org.basex.util.InputInfo) must be implemented by an expression, as it may be called by this method.

Specified by:
iter in class IndexAccess
Parameters:
ctx - query context
Returns:
resulting item

copy

public Expr 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 Simple
Parameters:
plan - root element

toString

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