public void applyPropertiesTo(CFMetaData cfmd) throws RequestValidationException {
    cfmd.defaultValidator(defaultValidator)
        .keyValidator(keyValidator)
        .columnMetadata(getColumns())
        .setDense(isDense);

    cfmd.addColumnMetadataFromAliases(
        keyAliases, keyValidator, ColumnDefinition.Type.PARTITION_KEY);
    cfmd.addColumnMetadataFromAliases(
        columnAliases, comparator, ColumnDefinition.Type.CLUSTERING_KEY);
    if (valueAlias != null)
      cfmd.addColumnMetadataFromAliases(
          Collections.<ByteBuffer>singletonList(valueAlias),
          defaultValidator,
          ColumnDefinition.Type.COMPACT_VALUE);

    properties.applyToCFMetadata(cfmd);
  }
  public void announceMigration() throws RequestValidationException {
    CFMetaData meta = validateColumnFamily(keyspace(), columnFamily());
    CFMetaData cfm = meta.clone();

    CFDefinition cfDef = meta.getCfDef();
    CFDefinition.Name name = columnName == null ? null : cfDef.get(columnName);
    switch (oType) {
      case ADD:
        if (cfDef.isCompact)
          throw new InvalidRequestException("Cannot add new column to a compact CF");
        if (name != null) {
          switch (name.kind) {
            case KEY_ALIAS:
            case COLUMN_ALIAS:
              throw new InvalidRequestException(
                  String.format(
                      "Invalid column name %s because it conflicts with a PRIMARY KEY part",
                      columnName));
            case COLUMN_METADATA:
              throw new InvalidRequestException(
                  String.format(
                      "Invalid column name %s because it conflicts with an existing column",
                      columnName));
          }
        }

        AbstractType<?> type = validator.getType();
        if (type instanceof CollectionType) {
          if (!cfDef.isComposite)
            throw new InvalidRequestException(
                "Cannot use collection types with non-composite PRIMARY KEY");
          if (cfDef.cfm.isSuper())
            throw new InvalidRequestException(
                "Cannot use collection types with Super column family");

          Map<ByteBuffer, CollectionType> collections =
              cfDef.hasCollections
                  ? new HashMap<ByteBuffer, CollectionType>(cfDef.getCollectionType().defined)
                  : new HashMap<ByteBuffer, CollectionType>();

          collections.put(columnName.key, (CollectionType) type);
          ColumnToCollectionType newColType = ColumnToCollectionType.getInstance(collections);
          List<AbstractType<?>> ctypes =
              new ArrayList<AbstractType<?>>(((CompositeType) cfm.comparator).types);
          if (cfDef.hasCollections) ctypes.set(ctypes.size() - 1, newColType);
          else ctypes.add(newColType);
          cfm.comparator = CompositeType.getInstance(ctypes);
        }

        Integer componentIndex =
            cfDef.isComposite
                ? ((CompositeType) meta.comparator).types.size() - (cfDef.hasCollections ? 2 : 1)
                : null;
        cfm.addColumnDefinition(ColumnDefinition.regularDef(columnName.key, type, componentIndex));
        break;

      case ALTER:
        if (name == null)
          throw new InvalidRequestException(
              String.format("Column %s was not found in table %s", columnName, columnFamily()));

        switch (name.kind) {
          case KEY_ALIAS:
            AbstractType<?> newType = validator.getType();
            if (newType instanceof CounterColumnType)
              throw new InvalidRequestException(
                  String.format(
                      "counter type is not supported for PRIMARY KEY part %s", columnName));
            if (cfDef.hasCompositeKey) {
              List<AbstractType<?>> newTypes =
                  new ArrayList<AbstractType<?>>(((CompositeType) cfm.getKeyValidator()).types);
              newTypes.set(name.position, newType);
              cfm.keyValidator(CompositeType.getInstance(newTypes));
            } else {
              cfm.keyValidator(newType);
            }
            break;
          case COLUMN_ALIAS:
            assert cfDef.isComposite;
            List<AbstractType<?>> newTypes =
                new ArrayList<AbstractType<?>>(((CompositeType) cfm.comparator).types);
            newTypes.set(name.position, validator.getType());
            cfm.comparator = CompositeType.getInstance(newTypes);
            break;
          case VALUE_ALIAS:
            cfm.defaultValidator(validator.getType());
            break;
          case COLUMN_METADATA:
            ColumnDefinition column = cfm.getColumnDefinition(columnName.key);
            column.setValidator(validator.getType());
            break;
        }
        break;

      case DROP:
        if (cfDef.isCompact)
          throw new InvalidRequestException("Cannot drop columns from a compact CF");
        if (name == null)
          throw new InvalidRequestException(
              String.format("Column %s was not found in table %s", columnName, columnFamily()));

        switch (name.kind) {
          case KEY_ALIAS:
          case COLUMN_ALIAS:
            throw new InvalidRequestException(
                String.format("Cannot drop PRIMARY KEY part %s", columnName));
          case COLUMN_METADATA:
            ColumnDefinition toDelete = null;
            for (ColumnDefinition columnDef : cfm.regularColumns()) {
              if (columnDef.name.equals(columnName.key)) toDelete = columnDef;
            }
            assert toDelete != null;
            cfm.removeColumnDefinition(toDelete);
            break;
        }
        break;
      case OPTS:
        if (cfProps == null)
          throw new InvalidRequestException(
              String.format("ALTER COLUMNFAMILY WITH invoked, but no parameters found"));

        cfProps.validate();
        cfProps.applyToCFMetadata(cfm);
        break;
      case RENAME:
        for (Map.Entry<ColumnIdentifier, ColumnIdentifier> entry : renames.entrySet()) {
          ColumnIdentifier from = entry.getKey();
          ColumnIdentifier to = entry.getValue();
          cfm.renameColumn(from.key, from.toString(), to.key, to.toString());
        }
        break;
    }

    MigrationManager.announceColumnFamilyUpdate(cfm, false);
  }