org.basex.query.xquery.util
Class Functions

java.lang.Object
  org.basex.query.xquery.util.Functions

public final class Functions
extends java.lang.Object

Global expression context.

Author:

Workgroup DBIS, University of Konstanz 2005-07, ISC License, Christian Gruen

Constructor Summary

Functions()

Method Summary

int	add(XQContext ctx, Func func) Adds a local function.
void	check() Checks if all functions have been correctly initialized.
void	comp(XQContext ctx) Compiles the functions.
void	error(QNm name) Finds similar function names for throwing an error message.
Func	get(int id) Returns the function with the specified id.
Expr	get(XQContext ctx, QNm name, Expr[] args) Returns the specified function.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Functions

public Functions()

Method Detail

add

public int add(XQContext ctx,
               Func func)
        throws XQException

Adds a local function.

Parameters:

ctx - query context

func - function instance

Returns:

function id

Throws:

XQException - evaluation exception

check

public void check()
           throws XQException

Checks if all functions have been correctly initialized.

Throws:

XQException - xquery exception

comp

public void comp(XQContext ctx)
          throws XQException

Compiles the functions.

Parameters:

ctx - xquery context

Throws:

XQException - xquery exception

error

public void error(QNm name)
           throws XQException

Finds similar function names for throwing an error message.

Parameters:

name - function name

Throws:

XQException - xquery exception

get

public Func get(int id)

Returns the function with the specified id.

Parameters:

id - function id

Returns:

function

get

public Expr get(XQContext ctx,
                QNm name,
                Expr[] args)
         throws XQException

Returns the specified function.

Parameters:

ctx - query context

name - name of the function

args - optional arguments

Returns:

function instance

Throws:

XQException - evaluation exception