Package org.basex.query.func.fn
Class FnTrace
- java.lang.Object
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- org.basex.query.expr.ExprInfo
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- org.basex.query.expr.Expr
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- org.basex.query.expr.ParseExpr
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- org.basex.query.expr.Arr
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- org.basex.query.func.StandardFunc
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- org.basex.query.func.fn.FnTrace
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- Direct Known Subclasses:
ProfDump
public class FnTrace extends StandardFunc
Function implementation.- Author:
- BaseX Team 2005-23, BSD License, Christian Gruen
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Field Summary
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Fields inherited from class org.basex.query.func.StandardFunc
definition, sc
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Constructor Summary
Constructors Constructor Description FnTrace()
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
ddo()
Indicates if this expression returns items in document order without duplicates.protected Expr
opt(CompileContext cc)
Performs function specific optimizations.static void
trace(byte[] value, byte[] label, QueryContext qc)
Dumps the specified info to standard error or the info view of the GUI.Value
value(QueryContext qc)
Evaluates the expression and returns the resulting value.-
Methods inherited from class org.basex.query.func.StandardFunc
checkPerm, coerceFunc, compileData, copy, dataLock, defined, description, embed, equals, has, optFirst, optFirst, optimize, serialize, simplifyArgs, toBaseUri, toBindings, toCollation, toCollationOrDefault, toContent, toContent, toData, toDate, toDBNode, toEncodingOrNull, toFunction, toFunction, toIO, toIO, toMs, toName, toNodeOrAtomItem, toOptions, toOptions, toPath, toPath, toStr, toString, toXml, toZeroStr, updating, vacuous
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Methods inherited from class org.basex.query.expr.Arr
accept, allAreValues, arg, args, checkUp, compile, copyAll, count, exprSize, flatten, inline, inlineable, mayBePositional, removeEmpty, simplifyAll
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Methods inherited from class org.basex.query.expr.ParseExpr
adoptType, atomValue, checkAllUp, checkNoEmpty, checkNoEmpty, checkNoneUp, checkNoUp, checkType, checkType, checkUp, copyType, ctxValue, data, ebv, info, item, iter, refineType, seqType, size, test, toArray, toArray, toAtomItem, toB64, toB64, toB64OrNull, toBin, toBin, toBoolean, toBoolean, toBooleanOrFalse, toBytes, toBytes, toDouble, toDouble, toElem, toElem, toFloat, toFunction, toItem, toItem, toLong, toLong, toMap, toMap, toNode, toNode, toNodeOrNull, toNumber, toNumberOrNull, toQNm, toQNmOrNull, toString, toString, toStringOrNull, toToken, toToken, toTokenOrNull, toZeroToken
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Methods inherited from class org.basex.query.expr.Expr
arg, atomItem, atomIter, funcType, hasFreeVars, indexAccessible, isSimple, markTailCalls, mergeEbv, optimizePos, simplify, simplifyFor, typeCheck, uses, visitAll
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Methods inherited from class org.basex.query.expr.ExprInfo
toErrorString, toString
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Method Detail
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value
public Value value(QueryContext qc) throws QueryException
Description copied from class:Expr
Evaluates the expression and returns the resulting value. If this method is not implemented,Expr.item(QueryContext, InputInfo)
must be implemented instead.- Overrides:
value
in classParseExpr
- Parameters:
qc
- query context- Returns:
- value
- Throws:
QueryException
- query exception
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opt
protected Expr opt(CompileContext cc)
Description copied from class:StandardFunc
Performs function specific optimizations.- Overrides:
opt
in classStandardFunc
- Parameters:
cc
- compilation context- Returns:
- optimized or original expression
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ddo
public boolean ddo()
Description copied from class:Expr
Indicates if this expression returns items in document order without duplicates.
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trace
public static void trace(byte[] value, byte[] label, QueryContext qc)
Dumps the specified info to standard error or the info view of the GUI.- Parameters:
value
- traced valuelabel
- additional label to display (may benull
)qc
- query context
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