void validate(Binder binder) {
// TODO: Set source from Struts XML.
if (hasScope(interceptorClass)) {
binder.addError(
"Scoping interceptors is not currently supported."
+ " Please remove the scope annotation from "
+ interceptorClass.getName()
+ ".");
}
// Make sure it implements Interceptor.
if (!Interceptor.class.isAssignableFrom(interceptorClass)) {
binder.addError(
interceptorClass.getName() + " must implement " + Interceptor.class.getName() + ".");
}
}
private static void checkTypeAndAnnotations(Binder binder, Class<?> type) {
if (!type.isInterface()) {
binder.addError("Type %s must be an interface", type);
}
if (!Finders.class.isAssignableFrom(type)) {
binder.addError("Type %s must be annotated with %s", type, Finders.class);
}
for (Method method : type.getMethods()) {
if (!method.isAnnotationPresent(Finder.class)) {
binder.addError("Method %s must be annotated with %s", method, Finder.class);
}
if (method.getReturnType() != Iterator.class) {
binder.addError("Method %s must return an %s", method, Iterator.class);
} else if (!resultType(method).isInterface()) {
binder.addError("%s must be an interface on method %s", resultType(method), method);
}
}
}
public List<ProviderMethod<?>> getProviderMethods(Binder binder) {
System.out.println("end");
List<ProviderMethod<?>> result = Lists.newArrayList();
Multimap<Signature, Method> methodsBySignature = HashMultimap.create();
for (Class<?> c = delegate.getClass(); c != Object.class; c = c.getSuperclass()) {
for (Method method : c.getDeclaredMethods()) {
// private/static methods cannot override or be overridden by other methods, so there is no
// point in indexing them.
// Skip synthetic methods and bridge methods since java will automatically generate
// synthetic overrides in some cases where we don't want to generate an error (e.g.
// increasing visibility of a subclass).
if (((method.getModifiers() & (Modifier.PRIVATE | Modifier.STATIC)) == 0)
&& !method.isBridge()
&& !method.isSynthetic()) {
methodsBySignature.put(new Signature(method), method);
}
Optional<Annotation> annotation = isProvider(binder, method);
if (annotation.isPresent()) {
result.add(createProviderMethod(binder, method, annotation.get()));
}
}
}
// we have found all the providers and now need to identify if any were overridden
// In the worst case this will have O(n^2) in the number of @Provides methods, but that is only
// assuming that every method is an override, in general it should be very quick.
for (ProviderMethod<?> provider : result) {
Method method = provider.getMethod();
for (Method matchingSignature : methodsBySignature.get(new Signature(method))) {
// matching signature is in the same class or a super class, therefore method cannot be
// overridding it.
if (matchingSignature.getDeclaringClass().isAssignableFrom(method.getDeclaringClass())) {
continue;
}
// now we know matching signature is in a subtype of method.getDeclaringClass()
if (overrides(matchingSignature, method)) {
String annotationString =
provider.getAnnotation().annotationType() == Provides.class
? "@Provides"
: "@" + provider.getAnnotation().annotationType().getCanonicalName();
binder.addError(
"Overriding "
+ annotationString
+ " methods is not allowed."
+ "\n\t"
+ annotationString
+ " method: %s\n\toverridden by: %s",
method,
matchingSignature);
break;
}
}
}
return result;
}
private static <T> void bind(Binder binder, Class<T> type) {
ImmutableMap.Builder<Method, Call> methods = ImmutableMap.builder();
for (Method method : type.getMethods()) {
try {
Call call = new Call(method, binder.getProvider(Storage.class));
methods.put(method, call);
} catch (ParseException e) {
binder.addError("%s\n%s", method, e.getMessage());
}
}
binder.bind(type).toInstance(proxy(type, methods.build()));
}
private <T> ProviderMethod<T> createProviderMethod(
Binder binder, Method method, Annotation annotation) {
binder = binder.withSource(method);
Errors errors = new Errors(method);
// prepare the parameter providers
InjectionPoint point = InjectionPoint.forMethod(method, typeLiteral);
List<Dependency<?>> dependencies = point.getDependencies();
List<Provider<?>> parameterProviders = Lists.newArrayList();
for (Dependency<?> dependency : point.getDependencies()) {
parameterProviders.add(binder.getProvider(dependency));
}
@SuppressWarnings("unchecked") // Define T as the method's return type.
TypeLiteral<T> returnType = (TypeLiteral<T>) typeLiteral.getReturnType(method);
Key<T> key = getKey(errors, returnType, method, method.getAnnotations());
try {
key = scanner.prepareMethod(binder, annotation, key, point);
} catch (Throwable t) {
binder.addError(t);
}
Class<? extends Annotation> scopeAnnotation =
Annotations.findScopeAnnotation(errors, method.getAnnotations());
for (Message message : errors.getMessages()) {
binder.addError(message);
}
return ProviderMethod.create(
key,
method,
delegate,
ImmutableSet.copyOf(dependencies),
parameterProviders,
scopeAnnotation,
skipFastClassGeneration,
annotation);
}
/**
* Returns true if the method is a provider.
*
* <p>Synthetic bridge methods are excluded. Starting with JDK 8, javac copies annotations onto
* bridge methods (which always have erased signatures).
*/
private Optional<Annotation> isProvider(Binder binder, Method method) {
if (method.isBridge() || method.isSynthetic()) {
return Optional.absent();
}
Annotation annotation = null;
for (Class<? extends Annotation> annotationClass : scanner.annotationClasses()) {
Annotation foundAnnotation = method.getAnnotation(annotationClass);
if (foundAnnotation != null) {
if (annotation != null) {
binder.addError(
"More than one annotation claimed by %s on method %s."
+ " Methods can only have one annotation claimed per scanner.",
scanner, method);
return Optional.absent();
}
annotation = foundAnnotation;
}
}
return Optional.fromNullable(annotation);
}
@Override
protected void setup(Binder binder) {
RecipeConfig recipes = buildConfigObject(RecipeConfig.class);
Multibinder<HttpService> httpServices = Multibinder.newSetBinder(binder, HttpService.class);
httpServices.addBinding().to(RecipeHttpService.class).in(Scopes.SINGLETON);
if (recipes.getRecipes() == null) {
return;
}
boolean set_default = false;
for (String recipeConfig : recipes.getRecipes()) {
URI recipeUri;
try {
recipeUri = new URI(recipeConfig);
} catch (URISyntaxException e) {
throw Throwables.propagate(
new InvalidConfigurationException("The value of 'recipe' config must be an URI."));
}
String path = "/" + recipeUri.getHost() + recipeUri.getPath();
InputStream stream;
switch (recipeUri.getScheme()) {
case "file":
try {
stream = new FileInputStream(path);
} catch (FileNotFoundException e) {
throw Throwables.propagate(e);
}
break;
case "resources":
stream = getClass().getResourceAsStream(path);
if (stream == null) {
throw new IllegalArgumentException("Recipe file couldn't found: " + recipeUri);
}
break;
case "http":
case "https":
try {
stream = recipeUri.toURL().openStream();
} catch (IOException e) {
binder.addError("The value of 'recipe' property '%s' is not an URL");
return;
}
break;
default:
binder.addError(
"The scheme of 'recipe' %s is not valid", recipeConfig, recipeUri.getScheme());
return;
}
ObjectMapper mapper = new ObjectMapper(new YAMLFactory());
mapper.registerModule(
new SimpleModule() {
@Override
public void setupModule(SetupContext context) {
context.insertAnnotationIntrospector(new SwaggerAnnotationIntrospector_());
}
});
Recipe recipe;
try {
recipe = mapper.readValue(stream, Recipe.class);
} catch (IOException e) {
binder.addError("'recipes' file %s couldn't parsed: %s", recipeConfig, e.getMessage());
return;
}
switch (recipe.getStrategy()) {
case DEFAULT:
if (set_default) {
binder.addError("Only one recipe can use DEFAULT strategy.");
return;
}
binder.bind(Recipe.class).toInstance(recipe);
binder.bind(RecipeLoader.class).asEagerSingleton();
binder.bind(RecipeHandler.class).in(Scopes.SINGLETON);
set_default = true;
break;
case SPECIFIC:
Multibinder<InjectionHook> hooks = Multibinder.newSetBinder(binder, InjectionHook.class);
hooks.addBinding().toInstance(new RecipeLoaderSingle(recipe));
break;
default:
throw new IllegalStateException();
}
}
}
@Override
public void addError(Message message) {
binder.addError(message);
}
@Override
public void addError(Throwable t) {
binder.addError(t);
}
@Override
public void addError(String message, Object... arguments) {
binder.addError(message, arguments);
}