package gnu.crypto.assembly;

// ----------------------------------------------------------------------------
// Id: $
//
// Copyright (C) 2003, Free Software Foundation, Inc.
//
// This file is part of GNU Crypto.
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// ----------------------------------------------------------------------------

/**
 * <p>An enumeration type for specifying the operation type of a
 * {@link Transformer}.</p>
 *
 * <p>The possible values for this type are two:</p>
 * <ol>
 *    <li>PRE_PROCESSING: where the input data is first processed by the
 *    current {@link Transformer} before being passed to the rest of the chain;
 *    and</li>
 *    <li>POST_PROCESSING: where the input data is first passed to the rest of
 *    the chain, and the resulting bytes are then processed by the current
 *    {@link Transformer}.</li>
 * </ol>
 *
 * @version $Revision: 1.2 $
 */
public final class Operation {

   // Constants and variables
   // -------------------------------------------------------------------------

   public static final Operation PRE_PROCESSING = new Operation(1);
   public static final Operation POST_PROCESSING = new Operation(2);

   private int value;

   // Constructor(s)
   // -------------------------------------------------------------------------

   private Operation(int value) {
      super();

      this.value = value;
   }

   // Class methods
   // -------------------------------------------------------------------------

   // Instance methods
   // -------------------------------------------------------------------------

   public String toString() {
      return (this == PRE_PROCESSING ? "pre-processing" : "post-processing");
   }
}