private void dropClassInternal(final String className) {
acquireSchemaWriteLock();
try {
if (getDatabase().getTransaction().isActive())
throw new IllegalStateException("Cannot drop a class inside a transaction");
if (className == null) throw new IllegalArgumentException("Class name is null");
getDatabase().checkSecurity(ORule.ResourceGeneric.SCHEMA, ORole.PERMISSION_DELETE);
final String key = className.toLowerCase();
final OClass cls = classes.get(key);
if (cls == null)
throw new OSchemaException("Class '" + className + "' was not found in current database");
if (!cls.getSubclasses().isEmpty())
throw new OSchemaException(
"Class '"
+ className
+ "' cannot be dropped because it has sub classes. Remove the dependencies before trying to drop it again");
checkEmbedded(getDatabase().getStorage());
for (OClass superClass : cls.getSuperClasses()) {
// REMOVE DEPENDENCY FROM SUPERCLASS
((OClassImpl) superClass).removeBaseClassInternal(cls);
}
deleteDefaultCluster(cls);
dropClassIndexes(cls);
classes.remove(key);
if (cls.getShortName() != null)
// REMOVE THE ALIAS TOO
classes.remove(cls.getShortName().toLowerCase());
removeClusterClassMap(cls);
} finally {
releaseSchemaWriteLock();
}
}
