Package org.basex.query.func.map

Class MapEntry

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.MapEntry

public final class MapEntry
extends StandardFunc

Function implementation.

Author:

BaseX Team 2005-24, BSD License, Leo Woerteler

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
MapEntry()

Method Summary

Modifier and Type	Method	Description
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.
protected void	simplifyArgs(CompileContext cc)	Simplifies the types of all arguments.

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

arity, checkPerm, coerceFunc, coerceFunc, compileData, copy, dataLock, defined, description, embed, equals, has, hasCTX, hasUPD, hofIndex, invoke, optFirst, optFirst, optimize, refineFunc, serialize, test, toBaseUri, toBindings, toCollation, toCollation, toContent, toContent, toData, toDate, toDBNode, toEncodingOrNull, toEncodingOrNull, toFunction, toFunction, toFunctionOrNull, toGregorian, toIO, toIO, toMs, toName, toNodeOrAtomItem, toOptions, toOptions, toOptions, toPath, toPath, toSerializerOptions, toStr, toString, toXml, toZeroStr, vacuous

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

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

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

MapEntry

public MapEntry()

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)

Description copied from class: StandardFunc

Performs function-specific optimizations.

Overrides:

opt in class StandardFunc

Parameters:

cc - compilation context

Returns:

optimized or original expression

simplifyArgs

protected void simplifyArgs(CompileContext cc)
                     throws QueryException

Description copied from class: StandardFunc

Simplifies the types of all arguments. This function is overwritten by functions that rely on the original argument type.

Overrides:

simplifyArgs in class StandardFunc

Parameters:

cc - compilation context

Throws:

QueryException - query exception