org.basex.query.func.map

Class MapMerge

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.MapMerge

public final class MapMerge
extends StandardFunc

Function implementation.

Author:

BaseX Team 2005-19, BSD License, Leo Woerteler

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	MapMerge.MergeOptions Merge options.

Field Summary

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

definition, sc, UNROLL_LIMIT

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 and Description
MapMerge()

Method Summary

Modifier and Type	Method and Description
Item	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

args, checkAdmin, checkArity, checkArity, checkCreate, checkData, checkPath, checkPath, coerceFunc, copy, ctxArg, dataLock, dateTimeToMs, description, equals, has, isVacuous, optFirst, optimize, plan, preEval, serialize, toBaseUri, toBindings, toCollation, toDBNode, toEncoding, toNodeOrAtomItem, toOptions, toPath, toPath, toQuery, toQuery, toString

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

accept, allAreValues, checkUp, compile, copyAll, count, emptyExpr, exprSize, inline, inline, inlineable, toString

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

adoptType, atomValue, checkAllUp, checkNoEmpty, checkNoEmpty, checkNoneUp, checkNoUp, checkType, checkType, checkUp, copyType, ctxValue, ebv, iter, seqType, size, test, toArray, toArray, toAtomItem, toB64, toB64, toBin, toBin, toBoolean, toBoolean, toBytes, toBytes, toDouble, toDouble, toElem, toEmptyNode, toEmptyToken, toFloat, toFunc, toItem, toItem, toLong, toLong, toMap, toMap, toNode, toNode, toNumber, toNumber, toQNm, toQNm, toToken, toToken, toTokenOrNull, value

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

atomItem, atomIter, data, funcType, hasFreeVars, indexAccessible, inlineAll, isSimple, iterable, markTailCalls, merge, optimizeEbv, typeCheck, uses, visitAll

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

toErrorString

Methods inherited from class java.lang.Object

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

Constructor Detail

MapMerge

public MapMerge()

Method Detail

item

public Item 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 (only required by Seq instances, which 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:

evaluated item

Throws:

QueryException - query exception