/** Creates a {@link PluginPropertyField} based on the given field. */
private PluginPropertyField createPluginProperty(Field field, TypeToken<?> resolvingType)
throws UnsupportedTypeException {
TypeToken<?> fieldType = resolvingType.resolveType(field.getGenericType());
Class<?> rawType = fieldType.getRawType();
Name nameAnnotation = field.getAnnotation(Name.class);
Description descAnnotation = field.getAnnotation(Description.class);
String name = nameAnnotation == null ? field.getName() : nameAnnotation.value();
String description = descAnnotation == null ? "" : descAnnotation.value();
if (rawType.isPrimitive()) {
return new PluginPropertyField(name, description, rawType.getName(), true);
}
rawType = Primitives.unwrap(rawType);
if (!rawType.isPrimitive() && !String.class.equals(rawType)) {
throw new UnsupportedTypeException("Only primitive and String types are supported");
}
boolean required = true;
for (Annotation annotation : field.getAnnotations()) {
if (annotation.annotationType().getName().endsWith(".Nullable")) {
required = false;
break;
}
}
return new PluginPropertyField(
name, description, rawType.getSimpleName().toLowerCase(), required);
}
private List<ApplicationClass> inspectApplications(File artifactFile)
throws IOException, InvalidArtifactException {
List<ApplicationClass> apps = Lists.newArrayList();
Location artifactLocation = Locations.toLocation(artifactFile);
Manifest manifest = BundleJarUtil.getManifest(artifactLocation);
if (manifest == null) {
return apps;
}
Attributes manifestAttributes = manifest.getMainAttributes();
if (manifestAttributes == null) {
return apps;
}
// right now we force users to include the application main class as an attribute in their
// manifest,
// which forces them to have a single application class.
// in the future, we may want to let users do this or maybe specify a list of classes or
// a package that will be searched for applications, to allow multiple applications in a single
// artifact.
String mainClassName = manifestAttributes.getValue(ManifestFields.MAIN_CLASS);
if (mainClassName != null) {
try (CloseableClassLoader artifactClassLoader =
artifactClassLoaderFactory.createClassLoader(Locations.toLocation(artifactFile))) {
Object appMain = artifactClassLoader.loadClass(mainClassName).newInstance();
if (!(appMain instanceof Application)) {
throw new InvalidArtifactException(
String.format(
"Application main class is of invalid type: %s", appMain.getClass().getName()));
}
Application app = (Application) appMain;
TypeToken typeToken = TypeToken.of(app.getClass());
TypeToken<?> resultToken = typeToken.resolveType(Application.class.getTypeParameters()[0]);
Type configType;
// if the user parameterized their template, like 'xyz extends ApplicationTemplate<T>',
// we can deserialize the config into that object. Otherwise it'll just be a Config
if (resultToken.getType() instanceof Class) {
configType = resultToken.getType();
} else {
configType = Config.class;
}
apps.add(new ApplicationClass(mainClassName, "", schemaGenerator.generate(configType)));
} catch (ClassNotFoundException e) {
throw new InvalidArtifactException(
String.format("Could not find Application main class %s.", mainClassName));
} catch (UnsupportedTypeException e) {
throw new InvalidArtifactException(
String.format("Config for Application %s has an unsupported schema.", mainClassName));
} catch (InstantiationException | IllegalAccessException e) {
throw new InvalidArtifactException(
String.format("Could not instantiate Application class %s.", mainClassName), e);
}
}
return apps;
}