public final class FTContains extends Single
Constructor and Description |
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FTContains(Expr expr,
FTExpr ftexpr,
InputInfo info)
Constructor.
|
Modifier and Type | Method and Description |
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boolean |
accept(ASTVisitor visitor)
Traverses this expression, notifying the visitor of declared and used variables,
and checking the tree for other recursive properties.
|
Expr |
compile(QueryContext qc,
VarScope scp)
Compiles and optimizes the expression, assigns types and cardinalities.
|
Expr |
copy(QueryContext qc,
VarScope scp,
IntObjMap<Var> vs)
Copies an expression.
|
VarUsage |
count(Var var)
Checks how often a variable is used in this expression.
|
int |
exprSize()
Counts the number of expressions in this expression's sub-tree.
|
boolean |
has(Expr.Flag flag)
Indicates if an expression has the specified compiler property.
|
boolean |
indexAccessible(IndexInfo ii)
Checks if an expression can be rewritten to an index access.
|
Expr |
inline(QueryContext qc,
VarScope scp,
Var var,
Expr ex)
Inlines an expression into this one, replacing all references to the given variable.
|
Bln |
item(QueryContext qc,
InputInfo ii)
Evaluates the expression and returns the resulting item,
or a
null reference if the expression yields an empty sequence. |
void |
plan(FElem plan)
Creates an expression tree.
|
boolean |
removable(Var var)
Checks if the specified variable is replaceable by a context value.
|
String |
toString() |
atomItem, atomValue, checkAtomic, checkNoEmpty, checkNoEmpty, checkNoneUp, checkNoUp, checkType, compBln, copyType, ctxValue, ebv, iter, optPre, optPre, preEval, seqType, seqType, size, test, toArray, toArray, toAtomItem, toB64, toB64, toBin, toBin, toBoolean, toBoolean, toBytes, toBytes, toDouble, toDouble, toElem, toEmptyNode, toEmptyToken, toFloat, toFunc, toItem, toLong, toLong, toMap, toMap, toNode, toNode, toNumber, toQNm, toQNm, toToken, toToken, value
atomIter, data, hasFreeVars, inlineAll, isEmpty, isFunction, isVacuous, isValue, iterable, markTailCalls, optimize, optimizeEbv, sameAs, typeCheck, uses, visitAll
addPlan, addPlan, description, planAttr, planElem, toErrorString
public FTExpr ftexpr
public Bln item(QueryContext qc, InputInfo ii) throws QueryException
Expr
null
reference if the expression yields an empty sequence.
If this method is not overwritten, Expr.iter(QueryContext)
must be implemented by an
expression, as it may be called by this method.item
in class ParseExpr
qc
- query contextii
- input infonull
QueryException
- query exceptionpublic Expr compile(QueryContext qc, VarScope scp) throws QueryException
Expr
QueryContext.compile()
.compile
in class Single
qc
- query contextscp
- variable scopeQueryException
- query exceptionpublic boolean has(Expr.Flag flag)
Expr
true
if at least one test is successful.public boolean removable(Var var)
Expr
Preds.removable(org.basex.query.var.Var)
if one of the variables is used within a predicate.Path.removable(org.basex.query.var.Var)
if the variable occurs within the path.GFLWOR.compile(QueryContext, VarScope)
to rewrite where
clauses into predicates.public VarUsage count(Var var)
Expr
SwitchCase.countCases(org.basex.query.var.Var)
or (indirectly)
GFLWOR.inlineLets(org.basex.query.QueryContext, org.basex.query.var.VarScope)
.public Expr inline(QueryContext qc, VarScope scp, Var var, Expr ex) throws QueryException
Expr
GFLWOR.inlineLets(org.basex.query.QueryContext, org.basex.query.var.VarScope)
and For.toPredicate(org.basex.query.QueryContext, org.basex.query.var.VarScope, org.basex.query.expr.Expr)
,
and the variable reference is replaced in VarRef.inline(org.basex.query.QueryContext, org.basex.query.var.VarScope, org.basex.query.var.Var, org.basex.query.expr.Expr)
.inline
in class Single
qc
- query context for reoptimizationscp
- variable scope for reoptimizationvar
- variable to replaceex
- expression to inlinenull
otherwiseQueryException
- query exceptionpublic boolean accept(ASTVisitor visitor)
Expr
public int exprSize()
Expr
StaticFunc.inline(org.basex.query.QueryContext, org.basex.query.util.list.AnnList, org.basex.query.expr.Expr)
to check if an expression
is small enough to be inlined.public boolean indexAccessible(IndexInfo ii) throws QueryException
Expr
IndexInfo.expr
.
This method will be called by Path.index(org.basex.query.QueryContext, org.basex.query.value.Value)
.indexAccessible
in class Expr
ii
- index infoQueryException
- query exceptionpublic Expr copy(QueryContext qc, VarScope scp, IntObjMap<Var> vs)
Expr
public void plan(FElem plan)
ExprInfo
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