systemcomposer.interface.FunctionElement

Function in client-server interface

Since R2022a

Description

A FunctionElement object describes the attributes of a function in a client-server interface systemcomposer.interface.ServiceInterface.

Creation

Create a function element using the addElement function.

element = addElement(serviceInterface,"f0")

Properties

Interface — Parent service interface of function element

service interface object

Parent service interface of function element, specified as a systemcomposer.interface.ServiceInterface object.

Name — Function element name

character vector | string

Function element name, specified as a character vector or string.

Example: "newFunctionElement"

Data Types: char | string

Asynchronous — Whether function element is asynchronous

1 (true) | 0 (false)

Whether function element is asynchronous, specified as 1 (true) or 0 (false).

Data Types: logical

FunctionPrototype — Function prototype

character vector | string

Function prototype to define input and output arguments, specified as a character vector or string.

Example: "[y1,y2]=f1(u1,u2)"

Data Types: char | string

FunctionArguments — Function arguments

array of function argument objects

Function arguments, specified as an array of systemcomposer.interface.FunctionArgument objects.

ExternalUID — Unique external identifier

character vector

Unique external identifier, specified as a character vector. The external ID is preserved over the lifespan of the element and through all operations that preserve the UUID.

Data Types: char

UUID — Universal unique identifier

character vector

Universal unique identifier, specified as a character vector.

Example: '91d5de2c-b14c-4c76-a5d6-5dd0037c52df'

Data Types: char

Object Functions

setName	Set name for value type, function argument, interface, or element
setFunctionPrototype	Set prototype for function element
getFunctionArgument	Get function argument on function element
setAsynchronous	Set function element as asynchronous
destroy	Remove model element
applyStereotype	Apply stereotype to architecture model element
getStereotypes	Get stereotypes applied on element of architecture model
changeStereotype	Change currently applied stereotype to new stereotype in its stereotype hierarchy
removeStereotype	Remove stereotype from model element
hasStereotype	Find if element has stereotype applied
hasProperty	Find if element has property
setProperty	Set property value corresponding to stereotype applied to element
getProperty	Get property value corresponding to stereotype applied to element
getPropertyValue	Get value of architecture property
getStereotypeProperties	Get stereotype property names on element
getEvaluatedPropertyValue	Get evaluated value of property from element

Examples

Get Function Argument

Create a new model.

model = systemcomposer.createModel("archModel","SoftwareArchitecture");
systemcomposer.openModel("archModel");

Create a service interface.

interface = addServiceInterface(model.InterfaceDictionary,"newServiceInterface");

Create a function element.

element = addElement(interface,"newFunctionElement");

Set a function prototype to add function arguments.

setFunctionPrototype(element,"y=f0(u)")

Get a function argument.

argument = getFunctionArgument(element,"y")

argument = 

  FunctionArgument with properties:

      Interface: [1×1 systemcomposer.interface.ServiceInterface]
        Element: [1×1 systemcomposer.interface.FunctionElement]
           Name: 'y'
           Type: [1×1 systemcomposer.ValueType]
     Dimensions: '1'
    Description: ''
           UUID: '018b4e55-fa8f-4250-ac2b-df72bf620feb'
    ExternalUID: ''

More About

Definitions

Term	Definition	Application	More Information
Software architecture	A software architecture is a specialization of an architecture for software-based systems, including the description of software compositions, component functions, and their scheduling.	Use software architectures in System Composer™ to author software architecture models composed of software components, ports, and interfaces. Design your software architecture model, define the execution order of your component functions, simulate your design in the architecture level, and generate code.	Author Software Architectures Simulate and Deploy Software Architectures
Software component	A software component is a specialization of a component for software entities, including its interfaces.	Implement a Simulink® export-function, rate-based, or JMAAB model as a software component, simulate the software architecture model, and generate code.	Implement Behaviors for Architecture Model Simulation Create Software Architecture from Component
Software composition	A software composition is a diagram of software components and connectors that represents a composite software entity, such as a module or application.	Encapsulate functionality by aggregating or nesting multiple software components or compositions.	Model Software Architecture of Throttle Position Control System
Function	A function is an entry point where a transfer of program control occurs and can be defined in a software component.	You can apply stereotypes to functions in software architectures, edit sample times, and specify the function period using the Functions Editor.	Author and Extend Functions for Software Architectures
Function element	A function element describes the attributes of a function in a client-server interface.	Edit the function prototype on a function element to change the number and names of inputs and outputs of the function. Edit function element properties as you would edit other interface element properties. Function argument types can include built-in types as well as bus objects. You can specify function elements to support: Synchronous execution — When the client calls the server, the function runs immediately and returns the output arguments to the client. Asynchronous execution — When the client makes a request to call the server, the function is executed asynchronously based on the priority order defined in the Functions Editor and Schedule Editor and returns the output arguments to the client.	systemcomposer.interface.FunctionElement
Function argument	A function argument describes the attributes of an input or output argument in a function element.	You can set the properties of a function argument in the Interface Editor just as you would other value types: Type, Dimensions, Units, Complexity, Minimum, Maximum, and Description.	systemcomposer.interface.FunctionArgument
Service interface	A service interface defines the functional interface between client and server components. Each service interface consists of one or more function elements.	Once you have defined a service interface in the Interface Editor, you can assign it to client and server ports using the Property Inspector. You can also use the Property Inspector to assign stereotypes to service interfaces.	Service Interfaces Overview systemcomposer.interface.ServiceInterface
Server	A server is a component that defines and provides a function.	A server component is where the function is defined. You can implement function behavior in a Simulink export-function model.	Service Interfaces Overview
Client	A client is a component that sends a request to the server.	A client component is where the function is called. The implementation of function call behavior is dependent on the synchronicity of the function execution.	Service Interfaces Overview
Class diagram	A class diagram is a graphical representation of a static structural model that displays unique architecture types of the software components optionally with software methods and properties.	Class diagrams capture one instance of each referenced model and show relationships between them. A component diagram view can be optionally represented as a class diagram for a software architecture model.	Class Diagram View of Software Architectures

Term	Definition	Application	More Information
Data dictionary	A data dictionary is a repository of data relevant to your model. The Architectural Data section of a data dictionary stores shared definitions used in Simulink and architecture model interfaces, such as port interfaces, data types, and system wide constants. For more information, see What Is a Data Dictionary?	You can save local interfaces on a System Composer model to the Architectural Data section of a Simulink data dictionary using the Interface Editor. In addition to the Interface Editor, you can also use the Architectural Data Editor to manage and modify interfaces and value types.	Manage Interfaces with Data Dictionaries Reference Data Dictionaries Store Shared Data in Architectural Data Section
Data interface	A data interface defines the kind of information that flows through a port. The same interface can be assigned to multiple ports. A data interface can be composite, meaning that it can include data elements that describe the properties of an interface signal.	Data interfaces represent the information that is shared through a connector and enters or exits a component through a port. Use the Interface Editor to create and manage data interfaces and data elements and store them in a data dictionary for reuse between models.	Create Architecture Model with Interfaces and Requirement Links Define Port Interfaces Between Components
Data element	A data element describes a portion of an interface, such as a communication message, a calculated or measured parameter, or other decomposition of that interface.	Data interfaces are decomposed into data elements that can represent pins or wires in a connector or harness, messages transmitted across a bus, and data structures shared between components.	Create Interfaces Assign Interfaces to Ports
Value type	A value type can be used as a port interface to define the atomic piece of data that flows through that port and has a top-level type, dimension, unit, complexity, minimum, maximum, and description.	You can also assign the type of data elements in data interfaces to value types. Add value types to data dictionaries using the Interface Editor so that you can reuse the value types as interfaces or data elements.	Create Value Types as Interfaces
Owned interface	An owned interface is an interface that is local to a specific port and not shared in a data dictionary or the model dictionary.	Create an owned interface to represent a value type or data interface that is local to a port.	Define Owned Interfaces Local to Ports
Adapter	An adapter connects two components with incompatible port interfaces by mapping between the two interfaces. An adapter can act as a unit delay, rate transition, or merge. You can also use an adapter for bus creation. Use the Adapter block to implement an adapter.	With an adapter, on the Interface Adapter dialog box, you can: create and edit mappings between input and output interfaces, apply an interface conversion UnitDelay to break an algebraic loop, apply an interface conversion RateTransition to reconcile different sample time rates for reference models, apply an interface conversion Merge to merge two or more message or signal lines, and when output interfaces are undefined, you can use input interfaces in bus creation mode to author owned output interfaces.	Interface Adapter Adapter

Version History

Introduced in R2022a