private static boolean lookForInterface(
java.lang.Class<?> klass, String className, Set<java.lang.Class<?>> alreadyVisited) {
if (klass.getName().equals(className)) return true;
// did we already visit this type?
if (!alreadyVisited.add(klass)) return false;
// first see if it satisfies it directly
SatisfiedTypes satisfiesAnnotation = klass.getAnnotation(SatisfiedTypes.class);
if (satisfiesAnnotation != null) {
for (String satisfiedType : satisfiesAnnotation.value()) {
satisfiedType = declClassName(satisfiedType);
int i = satisfiedType.indexOf('<');
if (i > 0) {
satisfiedType = satisfiedType.substring(0, i);
}
try {
if (lookForInterface(
java.lang.Class.forName(satisfiedType, true, klass.getClassLoader()),
className,
alreadyVisited)) {
return true;
}
} catch (ClassNotFoundException e) {
throw new RuntimeException(e);
}
}
}
// now look at this class's interfaces
for (java.lang.Class<?> intrface : klass.getInterfaces()) {
if (lookForInterface(intrface, className, alreadyVisited)) return true;
}
// no luck
return false;
}
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);
}
/**
* Get the package for the specified class. The class's class loader is used to find the package
* instance corresponding to the specified class. If the class loader is the bootstrap class
* loader, which may be represented by {@code null} in some implementations, then the set of
* packages loaded by the bootstrap class loader is searched to find the package.
*
* <p>Packages have attributes for versions and specifications only if the class loader created
* the package instance with the appropriate attributes. Typically those attributes are defined in
* the manifests that accompany the classes.
*
* @param class the class to get the package of.
* @return the package of the class. It may be null if no package information is available from
* the archive or codebase.
*/
static Package getPackage(Class<?> c) {
String name = c.getName();
int i = name.lastIndexOf('.');
if (i != -1) {
name = name.substring(0, i);
ClassLoader cl = c.getClassLoader();
if (cl != null) {
return cl.getPackage(name);
} else {
return getSystemPackage(name);
}
} else {
return null;
}
}
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);
}