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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.StandardFunc
org.basex.query.func.FNSeq
public final class FNSeq
Sequence functions.
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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FNSeq(InputInfo ii,
Function f,
Expr... e)
Constructor. |
Method Summary | |
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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. |
protected Expr |
opt(QueryContext ctx)
Performs function specific optimizations. |
Methods inherited from class org.basex.query.func.StandardFunc |
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atom, bindings, cache, checkData, checkFile, compile, copy, dataLock, dateTimeToMs, description, encoding, has, isFunction, isVacuous, oneOf, optimize, plan, toString |
Methods inherited from class org.basex.query.expr.Arr |
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accept, allAreValues, checkNoUp, checkUp, copyAll, count, exprSize, 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, value |
Methods inherited from class org.basex.query.expr.Expr |
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addText, compEbv, copy, hasFreeVars, indexAccessible, inlineAll, isEmpty, isItem, isValue, iterable, markTailCalls, 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 FNSeq(InputInfo ii, Function f, Expr... e)
ii
- input infof
- function definitione
- argumentsMethod Detail |
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public 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 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 exceptionprotected Expr opt(QueryContext ctx) throws QueryException
StandardFunc
opt
in class StandardFunc
ctx
- query context
QueryException
- query exception
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