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Roles are a powerful way for designing complex behaviours while keeping good practices such as Single Responsibility, Dependency Inversion and Interface Segregation.

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/*
 * *********************************************************************************************************************
 *
 * TheseFoolishThings: Miscellaneous utilities
 * http://tidalwave.it/projects/thesefoolishthings
 *
 * Copyright (C) 2009 - 2023 by Tidalwave s.a.s. (http://tidalwave.it)
 *
 * *********************************************************************************************************************
 *
 * 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
 *
 *     http://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.
 *
 * *********************************************************************************************************************
 *
 * git clone https://bitbucket.org/tidalwave/thesefoolishthings-src
 * git clone https://github.com/tidalwave-it/thesefoolishthings-src
 *
 * *********************************************************************************************************************
 */
package it.tidalwave.role.io;

import javax.annotation.Nonnull;
import java.io.IOException;
import java.io.InputStream;

/***********************************************************************************************************************
 *
 * The role of an object that can be unmarshalled.
 *
 * @stereotype Role
 *
 * @author  Fabrizio Giudici
 *
 **********************************************************************************************************************/
@FunctionalInterface
public interface Unmarshallable
  {
    public static final Class _Unmarshallable_ = Unmarshallable.class;

    /*******************************************************************************************************************
     *
     * Unmarshalls the object from the given {@link InputStream}.
     *
     * @param               the type of the returned value
     * @param   is             the {@code InputStream}
     * @return                 the unmarshalled object
     * @throws  IOException    when an error occurs
     *
     ******************************************************************************************************************/
    @SuppressWarnings("RedundantThrows")
    @Nonnull
    public  T unmarshal (@Nonnull InputStream is)
      throws IOException;
  }