Package org.basex.query.func.map

Class MapBuild

java.lang.Object

org.basex.query.expr.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.map.MapBuild

public final class MapBuild
extends StandardFunc

Function implementation.

Author:

BaseX Team 2005-24, BSD License, Christian Gruen

Field Summary

Fields inherited from class org.basex.query.func.StandardFunc

definition

Fields inherited from class org.basex.query.expr.Arr

exprs

Fields inherited from class org.basex.query.expr.ParseExpr

exprType, info

Constructor Summary

Constructors

Constructor	Description
MapBuild()

Method Summary

Modifier and Type	Method	Description
int	hofIndex()	Returns the index of a single higher-order function parameter.
XQMap	item(QueryContext qc, InputInfo ii)	Evaluates the expression and returns the resulting item, or Empty.VALUE if the expression yields an empty sequence.
protected Expr	opt(CompileContext cc)	Performs function-specific optimizations.

Methods inherited from class org.basex.query.func.StandardFunc

arity, checkPerm, coerce, coerce, compileData, copy, dataLock, defined, description, embed, equals, has, hasCTX, hasUPD, optFirst, optFirst, optimize, refineFunc, serialize, simplifyArgs, toBaseUri, toBindings, toBoolean, toCollation, toCollation, toContent, toContent, toData, toDate, toDBNode, toEncodingOrNull, toEncodingOrNull, toFunction, toFunction, toFunctionOrNull, toIO, toIO, toMs, toName, toNodeOrAtomItem, toOptions, toOptions, toPath, toPath, toStr, toString, toXml, toZeroStr, vacuous, variadic

Methods inherited from class org.basex.query.expr.Arr

accept, allAreValues, arg, args, checkUp, compile, copyAll, count, exprSize, flatten, inline, inlineable, mayBePositional, removeEmpty, simplifyAll

Methods inherited from class org.basex.query.expr.ParseExpr

adoptType, atomValue, checkAllUp, checkNoneUp, checkNoUp, checkType, checkType, checkUp, copyType, ctxValue, data, info, iter, refineType, sc, seqType, size, test, toArray, toArray, toAtomItem, toBin, toBin, toBinOrNull, toBoolean, toBoolean, toBooleanOrFalse, toBytes, toBytes, toDouble, toDouble, toElem, toElem, toEnum, toFloat, toFunction, toLong, toLong, toLong, toMap, toMap, toNode, toNode, toNodeOrNull, toNumber, toNumber, toNumberOrNull, toQNm, toQNmOrNull, toRecord, toString, toString, toStringOrNull, toToken, toToken, toTokenOrNull, toZeroToken, value

Methods inherited from class org.basex.query.expr.Expr

arg, atomItem, atomIter, ddo, funcType, hasFreeVars, indexAccessible, info, isSimple, markTailCalls, mergeEbv, optimizePos, simplify, simplifyFor, typeCheck, uses, visitAll

Methods inherited from class org.basex.query.expr.ExprInfo

toErrorString, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

MapBuild

public MapBuild()

Method Detail

item

public XQMap item(QueryContext qc,
                  InputInfo ii)
           throws QueryException

Description copied from class: Expr

Evaluates the expression and returns the resulting item, or Empty.VALUE if the expression yields an empty sequence. If this method is not implemented, Expr.value(QueryContext) must be implemented instead.

Overrides:

item in class ParseExpr

Parameters:

qc - query context

ii - input info (can be null); required for those Value instances that have no input info)

Returns:

item or Empty.VALUE

Throws:

QueryException - query exception

opt

protected Expr opt(CompileContext cc)
            throws QueryException

Description copied from class: StandardFunc

Performs function-specific optimizations.

Overrides:

opt in class StandardFunc

Parameters:

cc - compilation context

Returns:

optimized or original expression

Throws:

QueryException - query exception

hofIndex

public int hofIndex()

Description copied from class: StandardFunc

Returns the index of a single higher-order function parameter.

Overrides:

hofIndex in class StandardFunc

Returns:

index, -1 if no HOF parameter exists, or Integer#MAX_VALUE if the number cannot be returned or if multiple HOF parameters exist