org.basex.query.path
Class MixedPath
java.lang.Object
org.basex.data.ExprInfo
org.basex.query.expr.Expr
org.basex.query.expr.ParseExpr
org.basex.query.path.Path
org.basex.query.path.MixedPath
public final class MixedPath
- extends Path
Mixed path expression.
- Author:
- BaseX Team 2005-12, BSD License, Christian Gruen
Nested classes/interfaces inherited from class org.basex.query.expr.Expr |
Expr.Flag |
Fields inherited from class org.basex.query.path.Path |
root, steps |
Methods inherited from class org.basex.query.path.Path |
accept, addPreds, checkUp, compile, count, exprSize, get, has, inline, optimize, plan, 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, 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, iterable, markTailCalls, sameAs, uses, visitAll |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
MixedPath
public MixedPath(InputInfo ii,
Expr r,
Expr... s)
- Constructor.
- Parameters:
ii
- input infor
- root expression; can be a null
references
- axis steps
compilePath
protected Expr compilePath(QueryContext ctx,
VarScope scp)
throws QueryException
- Description copied from class:
Path
- Compiles the location path.
- Specified by:
compilePath
in class Path
- Parameters:
ctx
- query contextscp
- variable scope
- Returns:
- optimized expression
- Throws:
QueryException
- query exception
iter
public Iter iter(QueryContext ctx)
throws QueryException
- 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.
- Overrides:
iter
in class ParseExpr
- Parameters:
ctx
- query context
- Returns:
- resulting item
- 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
removable
public boolean removable(Var v)
- Description copied from class:
Expr
- Checks if the specified variable is replaceable by a context item.
The following tests might return false:
This method is called by
GFLWOR.compile(org.basex.query.QueryContext, org.basex.query.var.VarScope)
to rewrite where clauses
into predicates.
- Overrides:
removable
in class Path
- Parameters:
v
- variable to be replaced
- Returns:
- result of check