* This class handles the response from a TRANS2_QUERY_FS_INFORMATION request,
 * returning various file system information levels such as volume size and attributes.
 */
public class Trans2QueryFSInformationResponse extends SmbComTransactionResponse {

    private final int informationLevel;
    private FileSystemInformation info;

    /**

import jcifs.util.Strings;

/**
 * Represents the FILE_BOTH_DIR_INFORMATION structure used in SMB directory enumeration operations.
 * This structure contains comprehensive file information including timestamps, attributes, sizes,
 * short name (8.3 format), and full filename for directory entries.
 */
public class FileBothDirectoryInfo implements FileEntry, Decodable {

    private int nextEntryOffset;
    private int fileIndex;

import jcifs.internal.smb2.ServerMessageBlock2Request;
import jcifs.internal.smb2.Smb2Constants;
import jcifs.internal.util.SMBUtil;

/**
 * SMB2 Set Info request message. This command is used to modify file attributes,
 * security information, or other metadata on the server.
 *
 * @author mbechler
 *
 */
public class Smb2SetInfoRequest extends ServerMessageBlock2Request<Smb2SetInfoResponse> implements RequestWithFileId {

     * @param th
     *            the tree handle to use
     * @param wildcard
     *            wildcard pattern for filtering servers
     * @param searchAttributes
     *            attributes to search for
     * @param filter
     *            optional resource name filter
     * @throws CIFSException
     *            if enumeration fails
     */

        DirContext context;
        UnknownHostException uhe = null;

        try {
            context = new InitialDirContext();
            for ( ;; ) {
                try {
                    Attributes attributes = context.getAttributes(
                        "dns:/_ldap._tcp.dc._msdcs." + name,
                        new String[] { "SRV" }
                    );
                    return name;

// we assume the value returned by the LDAP server is canonical. Additionally,
// the attribute type names in the DN are lower-cased.
//
// Return values:
//
// If the DN is found, the normalized (string) value and any requested
// attributes are returned and error is nil.
//
// If the DN is not found, a nil result and error are returned.
//

     * Complete this operation immediately with an oplock break if it would break an oplock
     */
    public static final int FILE_COMPLETE_IF_OPLOCKED = 0x100;
    /**
     * The client does not understand extended attributes
     */
    public static final int FILE_NO_EA_KNOWLEDGE = 0x200;
    /**
     * Open a remote instance of the file
     */
    public static final int FILE_OPEN_REMOTE_INSTANCE = 0x400;
    /**

  /**
   * Replaces all parameters with the given attribute with parameters using the given
   * values. If there are no values, any existing parameters with the given attribute are removed.
   *
   * @throws IllegalArgumentException if either {@code attribute} or {@code values} is invalid
   * @since 24.0
   */
  public MediaType withParameters(String attribute, Iterable<String> values) {
    checkNotNull(attribute);

And these models are all sharing a lot of the data and duplicating attribute names and types.

We could do better.

We can declare a `UserBase` model that serves as a base for our other models. And then we can make subclasses of that model that inherit its attributes (type declarations, validation, etc).

All the data conversion, validation, documentation, etc. will still work as normally.

              // Ignore this attribute, it isn't recognizable as a date.
            }
          }

          attributeName.equals("max-age", ignoreCase = true) -> {
            try {
              deltaSeconds = parseMaxAge(attributeValue)
              persistent = true
            } catch (_: NumberFormatException) {
              // Ignore this attribute, it isn't recognizable as a max age.
            }