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/**
 * Executes HBase DDL operations.
 */
public interface HBaseDDLExecutor {

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

  /**
   * Enable the specified table.
   *
   * @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
   * @throws NotFoundException if the specified table does not exist
   */
  void enableTable(String namespace, String name) throws IOException;

  /**
   * Disable the specified table.
   *
   * @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
   * @throws NotFoundException if the specified table does not exist
   */
  void disableTable(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 NotFoundException if the specified table does not exist
   * @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 NotFoundException if the specified table does not exist
   * @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 NotFoundException if the namespace for the specified table does not exist
   * @throws IllegalStateException if the specified table is not disabled
   */
  void deleteTableIfExists(String namespace, String name) throws IOException;
}
 
/**
 * Describes an HBase Table.
 */
public class TableDescriptor {
  private final String namespace;
  private final String name;
  private final Map<String, ColumnFamilyDescriptor> families;
  private final Collection<CoprocessorDescriptor> coprocessors;
  private final Map<String, String> properties;
}
 
/**
 * Describes an HBase table CoProcessor.
 */
public class CoprocessorDescriptor {
  private final String classname;
  private final String path;
  private final int priority;
  private final Map<String, String> properties;
}

/**
 * Describes an HBase table column family.
 */
public class ColumnFamilyDescriptor {
  private final int maxVersions;
  private final CompressionType compressionType;
  private final BloomType bloomType;
  private final Map<String, String> properties;
}

/**
 * Types of column family compression.
 */
public enum CompressionType {
  LZO, SNAPPY, GZIP, NONE
}
 
/**
 * Types of column family bloom filters.
 */
public enum BloomType {
  ROW, ROWCOL, NONE
}