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java.lang.Objectorg.basex.data.ExprInfo
org.basex.query.expr.Expr
org.basex.query.expr.ParseExpr
org.basex.query.expr.Arr
org.basex.query.func.DynFuncCall
public final class DynFuncCall
Dynamic function call.
Nested Class Summary |
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Nested classes/interfaces inherited from class org.basex.query.expr.Expr |
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Expr.Flag |
Field Summary |
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Fields inherited from class org.basex.query.expr.Arr |
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expr |
Fields inherited from class org.basex.query.expr.ParseExpr |
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info, size, type |
Constructor Summary | |
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DynFuncCall(InputInfo ii,
Expr fun,
Expr[] arg)
Function constructor. |
Method Summary | |
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Expr |
compile(QueryContext ctx,
VarScope scp)
Compiles and optimizes the expression, assigns data types and cardinalities. |
Expr |
copy(QueryContext ctx,
VarScope scp,
IntObjMap<Var> vs)
Copies an expression. |
java.lang.String |
description()
Returns a string description of the expression. |
Item |
item(QueryContext ctx,
InputInfo ii)
Evaluates the expression and returns the resulting item or a null reference, if the expression yields an empty sequence. |
Iter |
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()
|
Value |
value(QueryContext ctx)
Evaluates the expression and returns the resulting value. |
Methods inherited from class org.basex.query.expr.Arr |
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accept, allAreValues, checkNoUp, checkUp, copyAll, count, exprSize, has, indexEquivalent, inline, removable, toString |
Methods inherited from class org.basex.query.expr.ParseExpr |
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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, optPre, preEval, size, test, type |
Methods inherited from class org.basex.query.expr.Expr |
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addText, compEbv, copy, hasFreeVars, indexAccessible, inlineAll, isEmpty, isFunction, isItem, isVacuous, isValue, iterable, markTailCalls, optimize, sameAs, uses, visitAll |
Methods inherited from class org.basex.data.ExprInfo |
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addPlan, addPlan, info, planAttr, planElem |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public DynFuncCall(InputInfo ii, Expr fun, Expr[] arg)
ii
- input infofun
- function expressionarg
- argumentsMethod Detail |
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public Expr compile(QueryContext ctx, VarScope scp) throws QueryException
Expr
compile
in class Arr
ctx
- query contextscp
- variable scope
QueryException
- query exceptionpublic Item item(QueryContext ctx, InputInfo ii) throws QueryException
Expr
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.
item
in class ParseExpr
ctx
- query contextii
- input info
QueryException
- query exceptionpublic Value value(QueryContext ctx) throws QueryException
Expr
value
in class ParseExpr
ctx
- query context
QueryException
- query exceptionpublic Iter iter(QueryContext ctx) throws QueryException
Expr
Expr.item(org.basex.query.QueryContext, org.basex.util.InputInfo)
must be implemented
by an expression, as it may be called by this method.
iter
in class ParseExpr
ctx
- query context
QueryException
- query exceptionpublic Expr copy(QueryContext ctx, VarScope scp, IntObjMap<Var> vs)
Expr
copy
in class Expr
ctx
- query contextscp
- variable scope for creating new variablesvs
- mapping from old variable IDs to new variable copies
public void plan(FElem plan)
ExprInfo
plan
in class Arr
plan
- root elementpublic java.lang.String description()
ExprInfo
ExprInfo.toString()
method,
arguments are not included in the output.
description
in class ExprInfo
public java.lang.String toString()
toString
in class ExprInfo
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