Examples of org.erlide.engine.model.root.IErlElement

org.erlide.engine.model.root.IErlElement
Common protocol for all elements provided by the Erlang model. Erlang model elements are exposed to clients as handles to the actual underlying element. The Erlang model may hand out any number of handles for each element. Handles that refer to the same element are guaranteed to be equal, but not necessarily identical.
Methods annotated as "handle-only" do not require underlying elements to exist. Methods that require underlying elements to exist throw a ErlModelException when an underlying element is missing. ErlModelException.isDoesNotExist can be used to recognize this common special case.
@noimplement This interface is not intended to be implemented by clients. @author jakob

    public IErlFolder createFolder(final IFolder folder, final IErlElement parent) {
        if (folder == null) {
            return null;
        }
        final IErlFolder f = new ErlFolder(parent, folder);
        final IErlElement p = parent;
        if (p != null) {
            p.addChild(f);
        } else {
            // ErlLogger.warn("creating folder %s in null parent?!", folder
            // .getName());
        }
        return f;

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     *         <code>null</code> if unable to associate the given resource with a Erlang
     *         element
     */
    @Override
    public IErlElement create(final IResource resource) {
        IErlElement parent = null;
        final IContainer resourceParent = resource.getParent();
        if (resourceParent != null) {
            IErlElement element = findElement(resourceParent);
            if (element == null) {
                element = create(resourceParent);
            }
            if (element != null) {
                parent = element;

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            if (parentElement instanceof IFile) {
                parentElement = ErlangEngine.getInstance().getModel()
                        .findModule((IFile) parentElement);
            }
            if (parentElement instanceof IErlElement) {
                final IErlElement parent = (IErlElement) parentElement;
                parent.open(null);
                final Collection<IErlElement> children = parent.getChildren();
                return children.toArray();
            }
        } catch (final ErlModelException e) {
            ErlLogger.warn(e);
        }

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     */


    @Override
    public Object getParent(final Object element) {
        if (element instanceof IErlElement) {
            final IErlElement elt = (IErlElement) element;
            final IErlElement parent = elt.getParent();
            if (parent instanceof IErlModule || parent instanceof IErlProject) {
                final IErlElement e = parent;
                return e.getCorrespondingResource();
            }
        }
        return null;
    }

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        if (element instanceof IFile || element instanceof IErlModule) {
            // it was too slow to open all modules to find out;
            // empty modules aren't widely used anyway :-)
            return true;
        } else if (element instanceof IErlElement) {
            final IErlElement parent = (IErlElement) element;
            return parent.hasChildren();
        }
        return false;
    }

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    // IErlElement findElement(IResource resource);
    @Test
    public void findElement() throws Exception {
        final IProject workspaceProject = project.getWorkspaceProject();
        final IErlElement findElement = model.findElement(workspaceProject);
        final IErlElement findElement2 = model.findElement(module
                .getCorrespondingResource());
        final IErlElement findElement3 = model.findElement(workspaceProject
                .getFolder("no_way"));
        final IErlElement findElement4 = model.findElement(workspaceProject.getParent());
        final IErlElement parent = module.getParent();
        final IFolder folder = (IFolder) parent.getResource();
        final IErlElement findElement5 = model.findElement(folder);
        project.open(null);
        final IErlElement srcFolder = project.getChildNamed("src");
        assertEquals(project, findElement);
        assertEquals(module, findElement2);
        assertNull(findElement3);
        assertNull(findElement4);
        assertEquals(srcFolder, findElement5);

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    @Test
    public void findModule() throws Exception {
        final IErlModule module2 = createModule(project, "zz5.erl", "-module(z5z).\n");
        final IFile file = (IFile) module2.getResource();
        final IErlModule findModule = model.findModule(file);
        final IErlElement parent = module2.getParent();
        final IFolder folder = (IFolder) parent.getResource();
        IFile createFile = null;
        try {
            createFile = createFile(folder, "tt.erl", "-module(tt).\n");
            model.findModule(createFile);
            assertEquals(module2, findModule);

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    private int how = SORT_ON_NAME;


    @Override
    public int compare(final Viewer viewer, final Object o1, final Object o2) {
        if (o1 instanceof IErlElement && o2 instanceof IErlElement) {
            final IErlElement e1 = (IErlElement) o1;
            final IErlElement e2 = (IErlElement) o2;
            if (e1.getKind() == ErlElementKind.CLAUSE
                    && e2.getKind() == ErlElementKind.CLAUSE) {
                return comparePositions(viewer, (ISourceReference) o1,
                        (ISourceReference) o2);
            }
        }
        return super.compare(viewer, o1, o2);

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    @Override
    public int category(final Object element) {
        if (!(element instanceof IErlElement)) {
            return super.category(element);
        }
        final IErlElement e = (IErlElement) element;
        switch (how) {
        case SORT_ON_NAME:
            if (e.getKind() == ErlElementKind.FUNCTION) {
                return 1000;
            }
            return e.getKind().ordinal();
        case SORT_ON_EXPORT:
            if (e.getKind() == ErlElementKind.FUNCTION) {
                if (e instanceof IErlFunction) {
                    final IErlFunction f = (IErlFunction) e;
                    if (f.isExported()) {
                        return 500;
                    }
                }
                return 1000;
            }
            return e.getKind().ordinal();
        default:
            return super.category(element);
        }
    }

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        final IStructuredSelection structuredSelection = (IStructuredSelection) selection;
        for (final Object element : structuredSelection.toArray()) {
            if (!(element instanceof IResource)) {
                return;
            }
            final IErlElement erlElement = ErlangEngine.getInstance().getModel()
                    .findElement((IResource) element);
            final IErlProject project = ErlangEngine.getInstance().getModelUtilService()
                    .getProject(erlElement);
            if (project != null) {
                projects.add(project);

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