private static boolean classExtendsClass(java.lang.Class<?> klass, String className) {
if (klass == null) return false;
if (klass.getName().equals(className)) return true;
if ((className.equals("ceylon.language.Basic"))
&& klass != java.lang.Object.class
&& !isSubclassOfString(klass)
// && klass!=java.lang.String.class
&& !klass.isAnnotationPresent(Class.class)
&& (!klass.isInterface() || !klass.isAnnotationPresent(Ceylon.class))) {
// TODO: this is broken for a Java class that
// extends a Ceylon class
return true;
}
Class classAnnotation = klass.getAnnotation(Class.class);
if (classAnnotation != null) {
String superclassName = declClassName(classAnnotation.extendsType());
int i = superclassName.indexOf('<');
if (i > 0) {
superclassName = superclassName.substring(0, i);
}
if (superclassName.isEmpty()) {
return false;
}
try {
return classExtendsClass(
java.lang.Class.forName(superclassName, true, klass.getClassLoader()), className);
} catch (ClassNotFoundException e) {
throw new RuntimeException(e);
}
}
return classExtendsClass(klass.getSuperclass(), className);
}
/**
* Returns all the annotations of this class. If there are no annotations then an empty array is
* returned.
*
* @return a copy of the array containing this class' annotations.
* @see #getDeclaredAnnotations()
*/
public Annotation[] getAnnotations() {
/*
* We need to get the annotations declared on this class, plus the
* annotations from superclasses that have the "@Inherited" annotation
* set. We create a temporary map to use while we accumulate the
* annotations and convert it to an array at the end.
*
* It's possible to have duplicates when annotations are inherited.
* We use a Map to filter those out.
*
* HashMap might be overkill here.
*/
HashMap<Class, Annotation> map = new HashMap<Class, Annotation>();
Annotation[] declaredAnnotations = getDeclaredAnnotations();
for (int i = declaredAnnotations.length - 1; i >= 0; --i) {
map.put(declaredAnnotations[i].annotationType(), declaredAnnotations[i]);
}
for (Class<?> sup = getSuperclass(); sup != null; sup = sup.getSuperclass()) {
declaredAnnotations = sup.getDeclaredAnnotations();
for (int i = declaredAnnotations.length - 1; i >= 0; --i) {
Class<?> clazz = declaredAnnotations[i].annotationType();
if (!map.containsKey(clazz) && clazz.isAnnotationPresent(Inherited.class)) {
map.put(clazz, declaredAnnotations[i]);
}
}
}
/* convert annotation values from HashMap to array */
Collection<Annotation> coll = map.values();
return coll.toArray(new Annotation[coll.size()]);
}
private static boolean classSatisfiesInterface(
java.lang.Class<?> klass, String className, Set<java.lang.Class<?>> alreadyVisited) {
if (klass == null || klass == ceylon.language.Anything.class) return false;
if ((className.equals("ceylon.language.Identifiable"))
&& klass != java.lang.Object.class
// && klass!=java.lang.String.class
&& !klass.isAnnotationPresent(Ceylon.class)) {
// TODO: this is broken for a Java class that
// extends a Ceylon class
return true;
}
if (className.equals("ceylon.language.Identifiable") && isSubclassOfString(klass)) {
return false;
}
// try the interfaces
if (lookForInterface(klass, className, alreadyVisited)) return true;
// try its superclass
Class classAnnotation = klass.getAnnotation(Class.class);
String superclassName;
if (classAnnotation != null) {
superclassName = declClassName(classAnnotation.extendsType());
int i = superclassName.indexOf('<');
if (i > 0) {
superclassName = superclassName.substring(0, i);
}
} else {
// Maybe the class didn't have an extends, so implictly Basic
superclassName = "ceylon.language.Basic";
}
if (!superclassName.isEmpty()) {
try {
return classSatisfiesInterface(
java.lang.Class.forName(superclassName, true, klass.getClassLoader()),
className,
alreadyVisited);
} catch (ClassNotFoundException e) {
throw new RuntimeException(e);
}
}
return classSatisfiesInterface(klass.getSuperclass(), className, alreadyVisited);
}
@Override
public <A extends Annotation> A getAnnotation(Class<A> annotationType) {
if (annotationType == null) {
throw new NullPointerException("annotationType == null");
}
A annotation = getDeclaredAnnotation(annotationType);
if (annotation != null) {
return annotation;
}
if (annotationType.isAnnotationPresent(Inherited.class)) {
for (Class<?> sup = getSuperclass(); sup != null; sup = sup.getSuperclass()) {
annotation = sup.getDeclaredAnnotation(annotationType);
if (annotation != null) {
return annotation;
}
}
}
return null;
}
