org.basex.query.func

Class StandardFunc

java.lang.Object

org.basex.data.ExprInfo

org.basex.query.expr.Expr

org.basex.query.expr.ParseExpr

org.basex.query.expr.Arr

org.basex.query.func.StandardFunc

Direct Known Subclasses:

FNAcc, FNAggr, FNContext, FNCrypto, FNDate, FNDb, FNFile, FNFormat, FNFt, FNFunc, FNGen, FNHof, FNHttp, FNId, FNIndex, FNInfo, FNJson, FNMap, FNMath, FNNode, FNNum, FNPat, FNQName, FNRepo, FNSeq, FNSimple, FNSql, FNStr, FNUtil, FNXslt, FNZip

public abstract class StandardFunc
extends Arr

Standard (built-in) functions.

Author:

BaseX Team 2005-12, BSD License, Christian Gruen

Nested Class Summary

Nested classes/interfaces inherited from class org.basex.query.expr.Expr

Expr.Use

Field Summary

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

expr

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

input, size, type

Method Summary

Methods

Modifier and Type	Method and Description
static Item	atom(Item it, InputInfo ii) Atomizes the specified item.
Expr	comp(QueryContext ctx) Compiles and optimizes the expression, assigns data types and cardinalities.
java.lang.String	description() Returns a string description of the expression.
boolean	isFunction(Function f) Checks if this expression is a certain function.
void	plan(Serializer ser) Serializes the expression tree.
java.lang.String	toString()

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

allAreValues, count, indexEquivalent, removable, remove, toString, uses

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

checkBln, checkColl, checkCreate, checkCtx, checkDbl, checkDBNode, checkEStr, checkEStr, checkIO, checkItem, checkItr, checkItr, checkMap, checkNode, checkNoEmpty, checkStr, checkType, checkUp, checkUp, checkWrite, compBln, ebv, item, iter, optPre, preEval, size, test, type, value

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

addText, compEbv, hasFreeVars, indexAccessible, isEmpty, isItem, isVacuous, isValue, iterable, markTailCalls, sameAs

Methods inherited from class org.basex.data.ExprInfo

info

Methods inherited from class java.lang.Object

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

Method Detail

comp

public final Expr comp(QueryContext ctx)
                throws QueryException

Description copied from class: Expr

Compiles and optimizes the expression, assigns data types and cardinalities.

Overrides:

comp in class Arr

Parameters:

ctx - query context

Returns:

optimized expression

Throws:

QueryException - query exception

atom

public static final Item atom(Item it,
        InputInfo ii)
                       throws QueryException

Atomizes the specified item.

Parameters:

it - input item

ii - input info

Returns:

atomized item

Throws:

QueryException - query exception

isFunction

public final boolean isFunction(Function f)

Description copied from class: Expr

Checks if this expression is a certain function.

Overrides:

isFunction in class Expr

Parameters:

f - function definition

Returns:

result of check

description

public final java.lang.String description()

Description copied from class: ExprInfo

Returns a string description of the expression. This method is only called by error messages. Contrary to the ExprInfo.toString() method, arguments are not included in the output.

Overrides:

description in class ExprInfo

Returns:

result of check

plan

public final void plan(Serializer ser)
                throws java.io.IOException

Description copied from class: ExprInfo

Serializes the expression tree.

Overrides:

plan in class Arr

Parameters:

ser - serializer

Throws:

java.io.IOException - I/O exception

toString

public final java.lang.String toString()

Specified by:

toString in class ExprInfo