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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.expr.CFrag
public abstract class CFrag
Fragment constructor.
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 |
Method Summary | |
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boolean |
has(Expr.Flag flag)
Indicates if an expression has the specified compiler property. |
abstract ANode |
item(QueryContext ctx,
InputInfo ii)
Evaluates the expression and returns the resulting item or a null reference, if the expression yields an empty sequence. |
protected java.lang.String |
toString(java.lang.String pref)
Prints the array with the specified separator. |
Methods inherited from class org.basex.query.expr.Arr |
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accept, allAreValues, checkNoUp, checkUp, compile, copyAll, count, exprSize, indexEquivalent, inline, plan, removable |
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, iter, optPre, preEval, size, test, type, value |
Methods inherited from class org.basex.query.expr.Expr |
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addText, compEbv, copy, 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, description, info, planAttr, planElem, toString |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Method Detail |
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public abstract ANode 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 boolean has(Expr.Flag flag)
Expr
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.
has
in class Arr
flag
- flag to be found
protected java.lang.String toString(java.lang.String pref)
Arr
toString
in class Arr
pref
- separator
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