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/**
 * Interface providing the HBase DDL operations.
 */
public interface HBaseDDLExecutor extends Closeable {
  /**
   * Initialize the {@link HBaseDDLExecutor}.
   * @param context the context for the executor
   */
  void initialize(HBaseDDLExecutorContext context);

  /**
   * Create the specified namespace if it does not exist.
   *
   * @param name the namespace to create
   * @throws IOException if a remote or network exception occurs
   */
  boolean createNamespaceIfNotExists(String name) throws IOException;

  /**
   * Delete the specified namespace if it exists.
   *
   * @param name the namespace to delete
   * @throws IOException if a remote or network exception occurs
   * @throws IllegalStateException if there are tables in the namespace
   */
  void deleteNamespaceIfExists(String name) throws IOException;

  /**
   * Create the specified table if it does not exist.
   *
   * @param descriptor the descriptor for the table to create
   * @param splitKeys the initial split keys for the table
   * @throws IOException if a remote or network exception occurs
   */
  void createTableIfNotExists(TableDescriptor descriptor, @Nullable byte[][] splitKeys)
    throws IOException;

  /**
   * Enable the specified table if it is disabled.
   *
   * @param namespace the namespace of the table to enable
   * @param name the name of the table to enable
   * @throws IOException if a remote or network exception occurs
   */
  void enableTableIfDisabled(String namespace, String name) throws IOException;

  /**
   * Disable the specified table if it is enabled.
   *
   * @param namespace the namespace of the table to disable
   * @param name the name of the table to disable
   * @throws IOException if a remote or network exception occurs
   */
  void disableTableIfEnabled(String namespace, String name) throws IOException;

  /**
   * Modify the specified table. The table must be disabled.
   *
   * @param namespace the namespace of the table to modify
   * @param name the name of the table to modify
   * @param descriptor the descriptor for the table
   * @throws IOException if a remote or network exception occurs
   * @throws IllegalStateException if the specified table is not disabled
   */
  void modifyTable(String namespace, String name, TableDescriptor descriptor) throws IOException;

  /**
   * Truncate the specified table. The table must be disabled.
   *
   * @param namespace the namespace of the table to truncate
   * @param name the name of the table to truncate
   * @throws IOException if a remote or network exception occurs
   * @throws IllegalStateException if the specified table is not disabled
   */
  void truncateTable(String namespace, String name) throws IOException;

  /**
   * Delete the table if it exists. The table must be disabled.
   *
   * @param namespace the namespace of the table to delete
   * @param name the table to delete
   * @throws IOException if a remote or network exception occurs
   * @throws IllegalStateException if the specified table is not disabled
   */
  void deleteTableIfExists(String namespace, String name) throws IOException;
 
  /**
   * Grant permissions on a table to users or groups.
   *
   * @param namespace the namespace of the table
   * @param name the name of the table
   * @param permissions A map from user name to the permissions for that user, given as a string containing
   *                    only the characters 'a' (Admin), 'c' (Create), 'r' (Read), 'w' (Write), and 'x' (Execute).
   * @throws IOException if anything goes wrong
   */
  void grantPermissions(String namespace, String name, Map<String, String> permissions) throws IOException;
}