Examples with ExternalDataHandler org.odk.collect.android.external.ExternalDataHandler used on opensource projects

Example 1 with ExternalDataHandler

use of org.odk.collect.android.external.ExternalDataHandler in project collect by opendatakit.

the class FormLoaderTask method doInBackground.

/**
 * Initialize {@link FormEntryController} with {@link FormDef} from binary or
 * from XML. If given an instance, it will be used to fill the {@link FormDef}.
 */
@Override
protected FECWrapper doInBackground(String... path) {
    errorMsg = null;
    final String formPath = path[0];
    final File formXml = new File(formPath);
    final FormDef formDef = createFormDefFromCacheOrXml(formXml);
    if (errorMsg != null || formDef == null) {
        return null;
    }
    // set paths to /sdcard/odk/forms/formfilename-media/
    final String formFileName = formXml.getName().substring(0, formXml.getName().lastIndexOf("."));
    final File formMediaDir = new File(formXml.getParent(), formFileName + "-media");
    externalDataManager = new ExternalDataManagerImpl(formMediaDir);
    // add external data function handlers
    ExternalDataHandler externalDataHandlerPull = new ExternalDataHandlerPull(externalDataManager);
    formDef.getEvaluationContext().addFunctionHandler(externalDataHandlerPull);
    try {
        loadExternalData(formMediaDir);
    } catch (Exception e) {
        Timber.e(e, "Exception thrown while loading external data");
        errorMsg = e.getMessage();
        return null;
    }
    if (isCancelled()) {
        // that means that the user has cancelled, so no need to go further
        return null;
    }
    // create FormEntryController from formdef
    final FormEntryModel fem = new FormEntryModel(formDef);
    final FormEntryController fec = new FormEntryController(fem);
    boolean usedSavepoint = false;
    try {
        Timber.i("Initializing form.");
        final long start = System.currentTimeMillis();
        usedSavepoint = initializeForm(formDef, fec);
        Timber.i("Form initialized in %.3f seconds.", (System.currentTimeMillis() - start) / 1000F);
    } catch (RuntimeException e) {
        Timber.e(e);
        if (e.getCause() instanceof XPathTypeMismatchException) {
            // this is a case of
            // https://bitbucket.org/m
            // .sundt/javarosa/commits/e5d344783e7968877402bcee11828fa55fac69de
            // the data are imported, the survey will be unusable
            // but we should give the option to the user to edit the form
            // otherwise the survey will be TOTALLY inaccessible.
            Timber.w("We have a syntactically correct instance, but the data threw an " + "exception inside JR. We should allow editing.");
        } else {
            errorMsg = e.getMessage();
            return null;
        }
    }
    // Remove previous forms
    ReferenceManager.instance().clearSession();
    processItemSets(formMediaDir);
    // This should get moved to the Application Class
    if (ReferenceManager.instance().getFactories().length == 0) {
        // this is /sdcard/odk
        ReferenceManager.instance().addReferenceFactory(new FileReferenceFactory(Collect.ODK_ROOT));
    }
    // Set jr://... to point to /sdcard/odk/forms/filename-media/
    ReferenceManager.instance().addSessionRootTranslator(new RootTranslator("jr://images/", "jr://file/forms/" + formFileName + "-media/"));
    ReferenceManager.instance().addSessionRootTranslator(new RootTranslator("jr://image/", "jr://file/forms/" + formFileName + "-media/"));
    ReferenceManager.instance().addSessionRootTranslator(new RootTranslator("jr://audio/", "jr://file/forms/" + formFileName + "-media/"));
    ReferenceManager.instance().addSessionRootTranslator(new RootTranslator("jr://video/", "jr://file/forms/" + formFileName + "-media/"));
    final FormController fc = new FormController(formMediaDir, fec, instancePath == null ? null : new File(instancePath));
    if (xpath != null) {
        // we are resuming after having terminated -- set index to this
        // position...
        FormIndex idx = fc.getIndexFromXPath(xpath);
        fc.jumpToIndex(idx);
    }
    if (waitingXPath != null) {
        FormIndex idx = fc.getIndexFromXPath(waitingXPath);
        fc.setIndexWaitingForData(idx);
    }
    data = new FECWrapper(fc, usedSavepoint);
    return data;
}