content: /*
   * Copyright 2014-2025 Real Logic Limited.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   * https://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.agrona.sbe;
  
  import org.agrona.DirectBuffer;
  
  /**
   * A flyweight for decoding an SBE message from a buffer.
   */
  public interface MessageDecoderFlyweight extends MessageFlyweight, DecoderFlyweight
  {
      /**
       * Wrap a buffer containing an encoded message for decoding.
       *
       * @param buffer            containing the encoded message.
       * @param offset            in the buffer at which the decoding should begin.
       * @param actingBlockLength the root block length the decoder should act on.
       * @param actingVersion     the version of the encoded message.
       * @return the {@link MessageDecoderFlyweight} for fluent API design.
       */
      MessageDecoderFlyweight wrap(DirectBuffer buffer, int offset, int actingBlockLength, int actingVersion);
  
      /**
       * Populate the supplied {@link StringBuilder} with the string representation of the message.
       *
       * @param builder destination for the string representation.
       * @return the supplied builder for a fluent API.
       */
      StringBuilder appendTo(StringBuilder builder);
  
      /**
       * Gets the total length of this flyweight by moving from the end of the block though all the variable
       * length fields.
       *
       * @return the total decoded length for the flyweight.
       */
      default int sbeDecodedLength()
      {
          throw new UnsupportedOperationException("not implemented by this version of SBE");
      }
  }
  