org.basex.query.up.expr
Class Delete
java.lang.Object
org.basex.data.ExprInfo
org.basex.query.expr.Expr
org.basex.query.expr.ParseExpr
org.basex.query.expr.Arr
org.basex.query.up.expr.Delete
public final class Delete
- extends Arr
Delete expression.
- Author:
- BaseX Team 2005-12, BSD License, Lukas Kircher
Nested classes/interfaces inherited from class org.basex.query.expr.Expr |
Expr.Flag |
Fields inherited from class org.basex.query.expr.Arr |
expr |
Methods inherited from class org.basex.query.expr.Arr |
accept, allAreValues, checkNoUp, checkUp, compile, copyAll, count, exprSize, indexEquivalent, inline, plan, removable, toString |
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, iter, optPre, preEval, size, test, type, value |
Methods inherited from class org.basex.query.expr.Expr |
addText, compEbv, copy, hasFreeVars, indexAccessible, inlineAll, isEmpty, isFunction, isItem, isVacuous, isValue, iterable, markTailCalls, optimize, sameAs, uses, visitAll |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Delete
public Delete(InputInfo ii,
Expr r)
- Constructor.
- Parameters:
ii
- input infor
- return expression
item
public Item item(QueryContext ctx,
InputInfo ii)
throws QueryException
- Description copied from class:
Expr
- Evaluates the expression and returns the resulting item or
a
null
reference, if the expression yields an empty sequence.
If this method is not overwritten, Expr.iter(org.basex.query.QueryContext)
must be implemented
by an expression, as it may be called by this method.
- Overrides:
item
in class ParseExpr
- Parameters:
ctx
- query contextii
- input info
- Returns:
- iterator
- Throws:
QueryException
- query exception
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 contextscp
- variable scope for creating new variablesvs
- mapping from old variable IDs to new variable copies
- Returns:
- copied expression
toString
public java.lang.String toString()
- Specified by:
toString
in class ExprInfo
has
public boolean has(Expr.Flag flag)
- Description copied from class:
Expr
- Indicates if an expression has the specified compiler property. This method is
called by numerous
Expr.compile(org.basex.query.QueryContext, org.basex.query.var.VarScope)
methods to test properties of sub-expressions.
It returns true
if at least one test is successful.
- Overrides:
has
in class Arr
- Parameters:
flag
- flag to be found
- Returns:
- result of check