private String getClassLevelUrlPath(TypeElement cls) {
RestApiMountPoint mountPoint = cls.getAnnotation(RestApiMountPoint.class);
String path = mountPoint == null ? "/" : mountPoint.value();
RequestMapping clsAnno = cls.getAnnotation(RequestMapping.class);
if (clsAnno == null || clsAnno.value().length == 0) {
return path;
} else if (clsAnno.value().length == 1) {
return Utils.joinPaths(path, clsAnno.value()[0]);
} else {
throw new IllegalStateException(
String.format(
"The RequestMapping annotation of class %s has multiple value strings. Only zero or one value is supported",
cls.getQualifiedName()));
}
}
public TypeVisitorImpl(
DeclaredType type,
List<? extends TypeMirror> typeArguments,
Collection<DeclaredType> typeRecursionGuard) {
TypeElement elem = (TypeElement) type.asElement();
_typeRecursionGuard = typeRecursionGuard;
_type = type;
List<? extends TypeParameterElement> generics = elem.getTypeParameters();
for (int i = 0; i < generics.size(); i++) {
DeclaredType value =
(typeArguments.isEmpty() || !(typeArguments.get(i) instanceof DeclaredType))
? null
: (DeclaredType) typeArguments.get(i);
_typeArguments.put(generics.get(i).getSimpleName(), value);
}
}
@Override
public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
for (TypeElement te : ElementFilter.typesIn(roundEnv.getRootElements())) {
if (isSimpleName(te, "InvalidSource")) {
for (Element c : te.getEnclosedElements()) {
for (AnnotationMirror am : c.getAnnotationMirrors()) {
Element ate = am.getAnnotationType().asElement();
if (isSimpleName(ate, "ExpectInterfaces")) {
checkInterfaces((TypeElement) c, getValue(am));
} else if (isSimpleName(ate, "ExpectSupertype")) {
checkSupertype((TypeElement) c, getValue(am));
}
}
}
}
}
return true;
}
private boolean isInstanceOf(TypeMirror typeMirror, Class type) {
if (!(typeMirror instanceof DeclaredType)) {
return false;
}
if (typeMirror.toString().startsWith(type.getName())) {
return true;
}
DeclaredType declaredType = (DeclaredType) typeMirror;
TypeElement typeElement = (TypeElement) declaredType.asElement();
for (TypeMirror iface : typeElement.getInterfaces()) {
if (isInstanceOf(iface, type)) {
return true;
}
}
return isInstanceOf(typeElement.getSuperclass(), type);
}
private JsonType buildType(DeclaredType declaredType, TypeElement element) {
if (_typeRecursionGuard.contains(declaredType)) {
return new JsonRecursiveObject(element.getSimpleName().toString());
}
JsonObject json = new JsonObject();
buildTypeContents(json, element);
return json; // we've already added to the cache; short-circuit to handle recursion
}
@Override
public JsonType visitDeclared(DeclaredType declaredType, Void o) {
if (isJsonPrimitive(declaredType)) {
// 'primitive'-ish things
return new JsonPrimitive(declaredType.toString());
} else if (isInstanceOf(declaredType, Collection.class)) {
if (declaredType.getTypeArguments().size() == 0) {
return new JsonArray(new JsonPrimitive(Object.class.getName()));
} else {
TypeMirror elem = declaredType.getTypeArguments().get(0);
return new JsonArray(elem.accept(this, o));
}
} else if (isInstanceOf(declaredType, Map.class)) {
if (declaredType.getTypeArguments().size() == 0) {
return new JsonDict(
new JsonPrimitive(Object.class.getName()), new JsonPrimitive(Object.class.getName()));
} else {
TypeMirror key = declaredType.getTypeArguments().get(0);
TypeMirror val = declaredType.getTypeArguments().get(1);
return new JsonDict(key.accept(this, o), val.accept(this, o));
}
} else {
TypeElement element = (TypeElement) declaredType.asElement();
if (element.getKind() == ElementKind.ENUM) {
List<String> enumConstants = new ArrayList();
for (Element e : element.getEnclosedElements()) {
if (e.getKind() == ElementKind.ENUM_CONSTANT) {
enumConstants.add(e.toString());
}
}
JsonPrimitive primitive =
new JsonPrimitive(String.class.getName()); // TODO is this always a string?
primitive.setRestrictions(enumConstants);
return primitive;
} else {
return buildType(declaredType, element);
}
}
}
private void buildTypeContents(JsonObject o, TypeElement element) {
if ("org.springframework.web.servlet.ModelAndView"
.equals(element.getQualifiedName().toString())) {
return;
}
if (element.getSuperclass().getKind() != TypeKind.NONE) {
// an interface's superclass is TypeKind.NONE
DeclaredType sup = (DeclaredType) element.getSuperclass();
if (!isJsonPrimitive(sup)) {
buildTypeContents(o, (TypeElement) sup.asElement());
}
}
for (Element e : element.getEnclosedElements()) {
if (e instanceof ExecutableElement) {
addFieldFromBeanMethod(o, (ExecutableElement) e);
}
}
}
private RequestMethod getRequestMethod(
ExecutableElement executableElement, TypeElement cls, RequestMapping anno) {
if (anno.method().length != 1) {
throw new IllegalStateException(
String.format(
"The RequestMapping annotation for %s.%s is not parseable. Exactly one request method (GET/POST/etc) is required.",
cls.getQualifiedName(), executableElement.getSimpleName()));
} else {
return anno.method()[0];
}
}
private void addFieldFromBeanMethod(JsonObject o, ExecutableElement executableElement) {
if (!isJsonBeanGetter(executableElement)) {
return;
}
TypeMirror type = executableElement.getReturnType();
String methodName = executableElement.getSimpleName().toString();
int trimLength = methodName.startsWith("is") ? 2 : 3;
String beanName = methodName.substring(trimLength + 1, methodName.length());
beanName = methodName.substring(trimLength, trimLength + 1).toLowerCase() + beanName;
// loop over the element's generic types, and build a concrete list from the owning context
List<DeclaredType> concreteTypes = new ArrayList();
// replace variables with the current concrete manifestation
if (type instanceof TypeVariable) {
type = getDeclaredTypeForTypeVariable((TypeVariable) type);
if (type == null) {
return; // couldn't find a replacement -- must be a generics-capable type with no generics
// info
}
}
String docComment = processingEnv.getElementUtils().getDocComment(executableElement);
if (type instanceof DeclaredType) {
TypeElement element = (TypeElement) ((DeclaredType) type).asElement();
for (TypeParameterElement generic : element.getTypeParameters()) {
concreteTypes.add(_typeArguments.get(generic.getSimpleName()));
}
Collection<DeclaredType> types = new HashSet<DeclaredType>(_typeRecursionGuard);
types.add(_type);
o.addField(beanName, newJsonType((DeclaredType) type, concreteTypes, types))
.setCommentText(docComment);
} else {
o.addField(beanName, newJsonType(type)).setCommentText(docComment);
}
}
private void checkSupertype(TypeElement te, String expect) {
System.err.println("check supertype: " + te + " -- " + expect);
String found = asString(te.getSuperclass());
checkEqual("supertype", te, found, expect);
}
private void checkInterfaces(TypeElement te, String expect) {
System.err.println("check interfaces: " + te + " -- " + expect);
String found = asString(te.getInterfaces(), ", ");
checkEqual("interfaces", te, found, expect);
}