com.scriptbasic.utility.functions

Class UtilityFunctions

java.lang.Object

com.scriptbasic.utility.functions.UtilityFunctions

public class UtilityFunctions
extends Object

Static methods in this class are registered in the interpreter when the interpreter starts. The interpreter calls the static method MethodRegisterUtility#registerFunctions(MethodRegistry) and that function registers the methods in this class with their own name so that BASIC programs can call the functions like BASIC built in functions.

Author:

Peter Verhas date July 15, 2012

Method Summary

Methods

Modifier and Type	Method and Description
static byte[]	byteBuffer(int len) Create a new byte buffer of length len.
static Long	getByte(byte[] buffer, Long i)
static byte[]	getStringBytes(String s)
static Boolean	isDefined(Object s)
static Boolean	isUndef(Object s)
static Long	length(Object arg)
static Object	newObject(String klass) This method can be used to call the default (parameter less) constructor of a class.
static void	setByte(byte[] buffer, Long i, Long v)
static String	stringifyBuffer(byte[] buffer)
static Object	undef() This function returns the undef value.

Methods inherited from class java.lang.Object

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

Method Detail

newObject

public static Object newObject(String klass)
                        throws ClassNotFoundException,
                               InstantiationException,
                               IllegalAccessException

This method can be used to call the default (parameter less) constructor of a class. This, of course, can only be used for classes that have parameter-less constructor.

Parameters:

klass - the class to instantiate

Returns:

the new object instance

Throws:

ClassNotFoundException

InstantiationException

IllegalAccessException

undef

public static Object undef()

This function returns the undef value.

Returns:

isUndef

public static Boolean isUndef(Object s)

Parameters:

s -

Returns:

true if the parameter is undefined

isDefined

public static Boolean isDefined(Object s)

Parameters:

s -

Returns:

true if the parameter is defined (not isUndef).

byteBuffer

public static byte[] byteBuffer(int len)

Create a new byte buffer of length len.

Parameters:

len - the length of the buffer allocated.

Returns:

the new buffer

getByte

public static Long getByte(byte[] buffer,
           Long i)

setByte

public static void setByte(byte[] buffer,
           Long i,
           Long v)
                    throws BasicRuntimeException

Throws:

BasicRuntimeException

getStringBytes

public static byte[] getStringBytes(String s)
                             throws UnsupportedEncodingException

Throws:

UnsupportedEncodingException

stringifyBuffer

public static String stringifyBuffer(byte[] buffer)
                              throws UnsupportedEncodingException

Throws:

UnsupportedEncodingException

length

public static Long length(Object arg)