/*
* (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 OClass doCreateClass(
final String className, final int[] clusterIds, int retry, OClass... superClasses)
throws ClusterIdsAreEmptyException {
OClass result;
final ODatabaseDocumentInternal db = getDatabase();
final OStorage storage = db.getStorage();
StringBuilder cmd = null;
getDatabase().checkSecurity(ORule.ResourceGeneric.SCHEMA, ORole.PERMISSION_CREATE);
acquireSchemaWriteLock();
try {
final String key = className.toLowerCase();
if (classes.containsKey(key) && retry == 0)
throw new OSchemaException("Class " + className + " already exists in current database");
if (!isDistributedCommand()) checkClustersAreAbsent(clusterIds);
cmd = new StringBuilder("create class ");
// if (getDatabase().getStorage().getConfiguration().isStrictSql())
// cmd.append('`');
cmd.append(className);
// if (getDatabase().getStorage().getConfiguration().isStrictSql())
// cmd.append('`');
List<OClass> superClassesList = new ArrayList<OClass>();
if (superClasses != null && superClasses.length > 0) {
boolean first = true;
for (OClass superClass : superClasses) {
// Filtering for null
if (superClass != null) {
if (first) cmd.append(" extends ");
else cmd.append(", ");
cmd.append(superClass.getName());
first = false;
superClassesList.add(superClass);
}
}
}
if (clusterIds != null) {
if (clusterIds.length == 1 && clusterIds[0] == -1) cmd.append(" abstract");
else {
cmd.append(" cluster ");
for (int i = 0; i < clusterIds.length; ++i) {
if (i > 0) cmd.append(',');
else cmd.append(' ');
cmd.append(clusterIds[i]);
}
}
}
if (isDistributedCommand()) {
createClassInternal(className, clusterIds, superClassesList);
final OAutoshardedStorage autoshardedStorage = (OAutoshardedStorage) storage;
OCommandSQL commandSQL = new OCommandSQL(cmd.toString());
commandSQL.addExcludedNode(autoshardedStorage.getNodeId());
final Object res = db.command(commandSQL).execute();
} else if (storage instanceof OStorageProxy) {
db.command(new OCommandSQL(cmd.toString())).execute();
reload();
} else createClassInternal(className, clusterIds, superClassesList);
result = classes.get(className.toLowerCase());
// WAKE UP DB LIFECYCLE LISTENER
for (Iterator<ODatabaseLifecycleListener> it = Orient.instance().getDbLifecycleListeners();
it.hasNext(); ) it.next().onCreateClass(getDatabase(), result);
} finally {
releaseSchemaWriteLock();
}
return result;
}