// Description of superclass and interfaces sections in class file of class c:
// 1. superclass d:
// if c is an interface then d is java.lang.Object
// if c == java.lang.Object then d is null (has index 0 in constant pool)
// if c is a class other than java.lang.Object then d is the declared superclass of c
// 2. interfaces S:
// if c is an interface then S is the set of interfaces c declares it extends
// if c is a class then S is the set of interfaces c declares it implements
private void processClassFile(DataInputStream in, String className) {
try {
int magicNum = in.readInt(); // 0xCAFEBABE
if (magicNum != 0xCAFEBABE) {
throw new ClassFormatError("bad magic number: " + Integer.toHexString(magicNum));
}
in.readUnsignedShort(); // read minor_version
in.readUnsignedShort(); // read major_version
int constant_pool_count = in.readUnsignedShort();
Object[] constant_pool = processConstantPool(in, constant_pool_count);
char access_flags = (char) in.readUnsignedShort(); // read access_flags
int self_index = in.readUnsignedShort();
int super_index = in.readUnsignedShort();
if (super_index == 0) {
assert (className.equals("java.lang.Object"));
classToDeclaredSuperclass.put(className, null);
clintToKind.put(className, TypeKind.CONCRETE_CLASS);
} else {
int c = (Integer) constant_pool[super_index];
Utf8 utf8 = (Utf8) constant_pool[c];
String superclassName = utf8.toString().replace('/', '.');
if (isInterface(access_flags)) {
assert (superclassName.equals("java.lang.Object"));
clintToKind.put(className, TypeKind.INTERFACE);
} else {
classToDeclaredSuperclass.put(className, superclassName);
if (isAbstract(access_flags)) clintToKind.put(className, TypeKind.ABSTRACT_CLASS);
else clintToKind.put(className, TypeKind.CONCRETE_CLASS);
}
}
int n_interfaces = (int) in.readUnsignedShort();
Set<String> interfaces = new ArraySet<String>(n_interfaces);
clintToDeclaredInterfaces.put(className, interfaces);
for (int i = 0; i < n_interfaces; ++i) {
int interface_index = in.readUnsignedShort();
int c = (Integer) constant_pool[interface_index];
Utf8 utf8 = (Utf8) constant_pool[c];
String interfaceName = utf8.toString().replace('/', '.');
interfaces.add(interfaceName);
}
in.close();
} catch (IOException ex) {
ex.printStackTrace();
System.exit(1);
}
}
