MATLAB Object-Oriented Programming

DefaultAsset Class Code

classdef DefaultAsset < financial.Assets

% file: +financial.@DefaultAsset/DefaultAsset.m

properties (SetAccess = private)

Type = "DefaultAsset"

end

methods

function obj = DefaultAsset

obj.Description = 'Place holder';

end

function value = getCurrentValue(~)

value = 0;

end

end

end

Operating on an Assets Array

The Assets class defines these methods to operate on heterogeneous arrays of asset

objects:

• pie — Creates a pie chart showing the mix of asset types in the array.


• makeReport — Uses the MATLAB table object to display a table of asset
  information.

To operate on a heterogeneous array, a method must be defined for the class of the

heterogeneous array and must be sealed. In this case, the class of heterogeneous arrays

is always the Assets class. MATLAB does not use the class of the individual elements of

the heterogeneous array when dispatching to methods.

makeReport Method Code

The Assets class makeReport method builds a table using the common properties and

getCurrentValue method for each object in the array.

function makeReport(obj)

numMembers = length(obj);

descs = cell(1,numMembers);

types(numMembers) = "";

values(numMembers) = 0;

for k = 1:numMembers

descs{k} = obj(k).Description;

20 Designing Related Classes