Ejemplo n.º 1
0
  /*
   * (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();
    }
  }
Ejemplo n.º 2
0
  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();
    }
  }