MATLAB BUILDER JA 2 User's Guide download pdf (Page 41)

How Does MATLAB Builder for Java H andle Data?

Understanding MATLAB Function Signatures

As background, recall that the generic MATLAB function has the following

structure:

function [Out1, Out2, ..., varargout]=foo(In1, In2, ..., varargin)

To the left of the equal sign, the function specifies a set of explicit and optional

return arguments.

To the right of the equal sign, the function lists explicit input arguments

followed by one or more optional arguments.

Each argument represents a MATLAB type. When you include the

varargin

or varargout argument, you can specify an arbitrary number of inputs or

outputs beyond the ones that are explicitly declared.

Overloaded Methods in Java That Encapsulate M-Code

When MATLAB B uilde r for Java encapsulates your M-code, it creates a set of

overloaded methods that implement the MATLAB functions. Each of these

overloaded methods corresponds to a call to the generic MATLAB function for

each combination of the possible number and type of input arguments.

In addition to these m ethods encapsulating input arguments, Java Builder

creates another method, which represents the output arguments, or return

values, of the MATLAB function. This additional overloaded method takes

care of return values for the encapsulated MATLAB function. This method

of encapsu lating the in formation about return values simulates the

mlx

interface in the MATLAB Compiler.

These overloaded methods are called the standard interface (encapsulating

input arguments) and the m lx interface (encapsulating return values). See

“Programming Interfaces Generated by JavaBuilder”onpage6-14fordetails.

ReturningDatafromMATLABtoJava

All data returned from a method coded in MATLAB is passed as an instance

of the appropriate

MWArray subclass. For example, a MATLAB cell a rray is

returned to the Java application as a n

MWCellArray object.

2-7

1 2 ... 36 37 38 39 40 41 42 43 44 45 46 ... 291 292

No comments

MATLAB BUILDER JA 2 User's Guide Page 41