MATLAB BUILDER JA 2 Podręcznik Użytkownika Pobierz pdf (Strona 40)

2 Concepts

class before it is passed to the method. Java Builder can convert any

Java string, numeric type, or any multidimensional array of these types to

an appropriate

MWArray type, using its data convers ion rules. See “Data

Conversion Rules” on page 6-10 for a list of all the data types that are

supported along with their equ i valent types in MATLAB.

The conversio n rul es ap pl y no t only when calling your own methods, but

also when calling constructors and factory methods belonging to the

MWArray

classes.

Note There are some data types commonly used in MATLAB that are

not available as native Java types. Examples are cell arrays and arrays of

complex numbers. Represent these array types as instances of

MWCellArray

and MWNumericArray,respectively.

Understanding Function Signatures G enerated by

Java Builder

The Java programming language does not support optional function

arguments in the way that MATLAB does with

varargin and varargout.To

support this feature of MATLAB, Java Builde r always generates a basic set

of overlo aded Jav a methods when it encapsulates each MATLAB function.

Each of these overloaded Java methods has the same name as the original

M-function, but has a different number or type of arguments. Each overloaded

function corresponds to one of the possible signatures in MATLAB.

In general, a function with

N input arguments in MATLAB generates N+3

overloaded methods in Java. There is an overloaded method for each input

argument (

N).Theadditionalthreemethodshandle(1)thecaseofnoinput

arguments and (2) the mlx function signature.

Note In addition to handling optional function arguments, the overloaded

Java methods that wrap MATLAB functions handle data conversion. See

“Automatic Conversion to MATLAB Ty pes” on page 2-5 f or more details.

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MATLAB BUILDER JA 2 Podręcznik Użytkownika Strona 40