User Tools


[TODO: this doc must be rewriten: matchWith () is missing, the other types of extension should be explained]

Note for the developpers: the Extension framework has been refactored and an updated documentation is under progress.

What is an extension

An extension is a kind of plugin. It can be dynamically found, loaded and initialized.

An extension has a set of meta-information (author, version, description…)

An extension is compatible with a model or not.

Different type of extensions

Capsis supports the following extension

  • Data Extractor
  • Export
  • Intervener
  • Stand Viewer
  • Model Tool
  • Object Viewer
  • Filter

How to use an extension

Capsis search and propose automatically the available extension. To see the installed Extension, use the Graphical Extension Manager :

Tools → Extension Manager

For more information, see Graphical extension Manager

Interactive Mode

The available extensions will be automatically proposed in the dialog box, for instance in the intervention or in the export dialog.

Script Mode

In a script, an extension can be directly used, like other classes. However, to ensure a correct initialization, you should use specific methods.

Intervener thinner = new DHAThinner(DHAThinner.AGE, 50, 500);
step = sc.runIntervener(thinner, step, step.getScene ().getInterventionBase ());

For more information, see the script mode

How to implement an extension

Create a class

An extension is a class which implements Extension

public class MyExtension implements Extension {
   // Meta Infos
   public static final String NAME = "MyExtension";
   public static final String VERSION = "1.2";
   public static final String AUTHOR =  "F. de Coligny";
   public static final String DESCRIPTION = "MyExtension.description";
   public static final String SUBTYPE = "SpecificExtension";
   // ....

Before being able to use a new extension, the extension list cache must be updated. This can be done with the following command (in a terminal) :

Under Linux

sh -se

Under Windows

capsis -se


public class TplIOFormat implements IFormat, OFormat {
	static public String NAME = "TplIOFormat";
	static public String AUTHOR = "SDK";
	static public String DESCRIPTION = "IOFormat test";
	static public String VERSION = "1.0";
        /** Initialize Export with a model and a step */
	public void initExport(GModel m, Step s) throws Exception {
		// TODO Auto-generated method stub
	public GScene load(GModel model) throws Exception {
		// TODO Auto-generated method stub
		return null;
	public void save(String fileName) throws Exception {
		// TODO Auto-generated method stub
	public void activate() {
		// TODO Auto-generated method stub


public class TplInterverner implements Intervener {
	static public String name = "TplIntevener";
	static public String author = "SDK";
	static public String description = "Intervener test";
	static public String version = "1.0";
        int param;
        /** Default constructor */
        public TplInterverner() {};
        /** Specific constructor */
        public TplInterverner(int p) {
           param = p;
        /** Initialize the extension
         * @Param m
         * @Param s
         * @Param scene
         * @Param c
	public void init(GModel m, Step s, GScene scene, Collection c) {
		// TODO Auto-generated method stub
        /** Open the dialog box in interactive mode */
	public void initGUI() {
		// TODO Auto-generated method stub
	public Object apply() throws Exception {
		// TODO Auto-generated method stub
		return null;
	public boolean isReadyToApply() {
		// TODO Auto-generated method stub
		return false;
	public void activate() {
		// TODO Auto-generated method stub

Tuning the extensions compatibility through the Graphical Extension Manager


Access by menu Tools > Extension Manager. Display the list of the platform extensions (fig. 1). Possible customisation of the extensions compatibility by vetoes or with an exhaustive compatibility list for the considered model.

Choose the type of extension in the combo box, check the column names you want to see. Click or Ctrl-click on the column header to sort in ascending / descending order.

Select a line in the table to get the precise description of an extension, if an online help file is available for this extension, the green icon Help in the top right corner can show it.

Fig. 1. The Graphical Extension Manager showing the extensions of type “Data extractor”, Rdi / Time is compatible with the model Fagacées

Compatibility columns

When a new project is loaded in the project manager, a new column is added for the model linked to the project. If several projects are opened (fig. 2), there is a column per model (ex: 2 projects Ventoux and 1 project PP3 result in 2 columns: Ventoux and PP3).

Note: If the Graphical Extension Manager is already opened when opening / closing a project, use the “Update” button to refresh it.

The extensions of the platform can evaluate their compatibility with a built-in system dealing with a referent object. The type of this referent depends on the type of the extension. Thus for example, the Data extractors and the Memorizers have a referent of type GModel (compatible with a model), while the Data renderers have a referent of type Data extractor (compatible with another extension).

  • For the extensions with a referent of type GModel, the compatibility column contains check boxes, selected only if the extension is compatible with the model of the column.
  • For the extensions which compatibility is not of type GModel, the compatibility column is empty.

Fig. 2. Two compatibility columns: the Ventoux model is managed by Vetoes and PP3 is managed by List

A right click on the compatibility column of a model opens an Compatibility contextual menu to customise the compatibility for this model.

Built-in compatibility: the extensions evaluate their compatibility with their built-in compatibility evaluation system (default option).

Customisation with vetoes: vetoes can be set to desactivate some extensions for a considered model. This option is available for all the extensions (compatible with all kinds of referents). The extensions with a veto will not appear in the lists of extensions proposed to the end-user by the graphical user interface for the considered model.

When this option is activated, the text (Vetoes) is added in the column header, it is then possible to add / remove vetoes with the compatibility contextual menu. The vetoes are saved in a file extension.veto in the directory of the module (e.g. capsis4/bin/pp3/extension.veto). For the extensions with a veto, the text Veto appears in the compatibility column.

Customisation by list: creates an exhaustive list of extensions compatible with a given model. This option makes sure that new extensions developed by the community will not be added in the list of extensions for the considered model. This can be useful for distribution to end-users, by making a kind of stable profile.

When this option is activated, the text (List) is added in the column header and it is possible to use the Compatibility contextual menu to include / exclude extensions in the list. The list is saved in a file extension.list in the directory of the model (e.g. capsis4/bin/ventoux/extension.list). For the extensions in the list, the text Included appears in the compatibility column.

Note: for the vetoes and list management, it is possible to select several lines at the same time in the table by using Ctrl-click, Shift-click or Ctrl-A to select all.

The choice of the compatibility options (built-in, vetoes, list) is memorized at Capsis closing time and restored at next launch. When booting with the parameter -nooptions or when first booting on a new computer after an install, the following priorities are played for each model:

  1. look for a file extension.list,
  2. if not found, look for a file extension.veto,
  3. otherwise use the built-in compatibility system.
documentation/extensions.txt · Last modified: 2013/05/23 10:25 (external edit)