How to read Rodin projects and elements programmatically

How to read a Rodin Project

You can access an existing Rodin project using RodinCore.getRodinDB().getRodinProject("your_project_name"). This returns a handle to an IRodinProject. This project may or may not exist. Call exists on the resulting project to be sure.

An other option is calling RodinCore.getRodinDB().getRodinProjects, which returns an array with of all existing IRodinProjects.

How to read a Machine or a Context

Machines and Contexts are accessed through IMachineRoot and IContextRoot respectively. Those roots are stored in IRodinFiles.

The following method returns all existing IMachineRoots of a project:

     public static IMachineRoot[] getMachineRootChildren(IRodinProject project) throws RodinDBException {
           ArrayList<IMachineRoot> result = new ArrayList<IMachineRoot>();
           for (IRodinElement element : project.getChildren()) {
                 if (element instanceof IRodinFile) {
                       IInternalElement root = ((IRodinFile) element).getRoot();
                       if (root instanceof IMachineRoot) {
                             result.add((IMachineRoot) root);
                       }
                 }
           }
           return result.toArray(new IMachineRoot[result.size()]);
     }

And this method returns all existing IContextRoots of a project:

     public static IContextRoot[] getContextRootChildren(IRodinProject project) throws RodinDBException {
           ArrayList<IContextRoot> result = new ArrayList<IContextRoot>();
           for (IRodinElement element : project.getChildren()) {
                 if (element instanceof IRodinFile) {
                       IInternalElement root = ((IRodinFile) element).getRoot();
                       if (root instanceof IContextRoot) {
                             result.add((IContextRoot) root);
                       }
                 }
           }
           return result.toArray(new IContextRoot[result.size()]);
     }

How to read Invariants, Events, Theorems etc.

Once you have obtained an IMachineRoot or an IContextRoot it is very easy to access its child elements. There exist functions such as getInvariants() to obtain an array of all existing IInvariants. If you just want a specific element call a function of the form getInvariant("your_invariant_name"). Again this only returns a handle and does not guarantee that the element exists.