GitLab

Goal

Until now we assumed that each Port has the type Q, but EMAM supports other basic types:

• Q for rational numbers, converted to double
• N for natural numbers, converted to int
• Z for whole numbers, also converted to int
• B for boolean values, converted to bool
• (C for complex, you can ignore this)

You can get the Type-String of a port with port.getTypeReference().getName().

Example code in Freemarker:

<#list model.getOutgoingPorts() as port>
    <#switch  port.getTypeReference().getName()>
        <#case "Q">
        // double
        <#break>
        <#case "N">
        //int
        <#break>
        <#case "Z">
        //int
        <#break>
        <#default>
            //error
    </#switch>
</#list>

Suggestion

Write/parse the values in standard String form

• Q -> 1.5
• N -> 1
• Z -> -1
• B -> false

Alternative

You can convert the whole number types(Z,N) by rounding a double:

//Subscriber
*port_ = (int) round(value);
//Publisher
string value = to_string(1.0 * component->${pub.getName()});

Make sure that the pointer to port_ has the right type(int* in this case)

You can convert the boolean type(B) by checking a threshold:

//Subscriber
*port_ = (value > 1.0e-10);
//Publisher
string value = to_string(component->${pub.getName()} ? 1.0 : 0.0);

Make sure that the pointer to port_ has the right type(bool* in this case)

Alternative:

Deliverables

Adapt your templates, so that all generated publish and callback methods support the Port Types Q, B, Z, and N. You might have to generated multiple Callback classes(e.g. CallbackQ.cpp/.hpp, CallbackN.cpp/.hpp,...) or think of an other approach.