/*
* (non-Javadoc)
*
* @see com.orientechnologies.orient.core.metadata.schema.OSchema#dropClass(java.lang.String)
*/
public void dropClass(final String className) {
final ODatabaseDocumentInternal db = getDatabase();
final OStorage storage = db.getStorage();
final StringBuilder cmd;
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();
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");
cmd = new StringBuilder("drop class ");
cmd.append(className);
cmd.append(" unsafe");
if (isDistributedCommand()) {
final OAutoshardedStorage autoshardedStorage = (OAutoshardedStorage) storage;
OCommandSQL commandSQL = new OCommandSQL(cmd.toString());
commandSQL.addExcludedNode(autoshardedStorage.getNodeId());
db.command(commandSQL).execute();
dropClassInternal(className);
} else if (storage instanceof OStorageProxy) {
final OCommandSQL commandSQL = new OCommandSQL(cmd.toString());
db.command(commandSQL).execute();
reload();
} else dropClassInternal(className);
// FREE THE RECORD CACHE
getDatabase().getLocalCache().freeCluster(cls.getDefaultClusterId());
} finally {
releaseSchemaWriteLock();
}
}
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();
}
}