public int compare(Field a, Field b) {
if (a == b) return 0;
else if (a == null) return -1;
else if (b == null) return 1;
else if (a.equals(b)) return 0;
int cmp = a.getName().compareTo(b.getName());
if (cmp != 0) return cmp;
cmp = a.getDeclaringClass().getName().compareTo(b.getDeclaringClass().getName());
if (cmp != 0) return cmp;
return a.getType().getName().compareTo(b.getType().getName());
}
/** Calculates a MD5 digest of the class. */
public String getDigest() {
try {
if (_className == null || "".equals(_className)) return "";
DynamicClassLoader loader =
(DynamicClassLoader) Thread.currentThread().getContextClassLoader();
ClassLoader tmpLoader = loader.getNewTempClassLoader();
Class cl = Class.forName(_className, false, tmpLoader);
if (cl == null) return "";
MessageDigest digest = MessageDigest.getInstance("MD5");
addDigest(digest, cl.getName());
addDigest(digest, cl.getModifiers());
Class superClass = cl.getSuperclass();
if (superClass != null) addDigest(digest, superClass.getName());
Class[] interfaces = cl.getInterfaces();
for (int i = 0; i < interfaces.length; i++) addDigest(digest, interfaces[i].getName());
Field[] fields = cl.getDeclaredFields();
Arrays.sort(fields, new FieldComparator());
if (_checkFields) {
for (Field field : fields) {
if (Modifier.isPrivate(field.getModifiers()) && !_checkPrivate) continue;
if (Modifier.isProtected(field.getModifiers()) && !_checkProtected) continue;
addDigest(digest, field.getName());
addDigest(digest, field.getModifiers());
addDigest(digest, field.getType().getName());
addDigest(digest, field.getAnnotations());
}
}
Method[] methods = cl.getDeclaredMethods();
Arrays.sort(methods, new MethodComparator());
for (int i = 0; i < methods.length; i++) {
Method method = methods[i];
if (Modifier.isPrivate(method.getModifiers()) && !_checkPrivate) continue;
if (Modifier.isProtected(method.getModifiers()) && !_checkProtected) continue;
if (Modifier.isStatic(method.getModifiers()) && !_checkStatic) continue;
addDigest(digest, method.getName());
addDigest(digest, method.getModifiers());
addDigest(digest, method.getName());
Class[] param = method.getParameterTypes();
for (int j = 0; j < param.length; j++) addDigest(digest, param[j].getName());
addDigest(digest, method.getReturnType().getName());
Class[] exn = method.getExceptionTypes();
for (int j = 0; j < exn.length; j++) addDigest(digest, exn[j].getName());
addDigest(digest, method.getAnnotations());
}
byte[] digestBytes = new byte[256];
int len = digest.digest(digestBytes, 0, digestBytes.length);
return digestToBase64(digestBytes, len);
} catch (Exception e) {
log.log(Level.FINER, e.toString(), e);
return "";
}
}