it.tidalwave.role.ui.PresentationModelAggregate Maven / Gradle / Ivy

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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.ui;

import javax.annotation.Nonnull;
import java.util.Collection;
import java.util.Optional;
import it.tidalwave.role.Aggregate;
import lombok.AccessLevel;
import lombok.RequiredArgsConstructor;
import lombok.ToString;

/***********************************************************************************************************************
 *
 * A specialisation of {@link Aggregate}{@code } which offers a convenience method for aggregating
 * its contained objects.
 *
 * @author  Fabrizio Giudici
 * @since 3.2-ALPHA-3
 *
 **********************************************************************************************************************/
@RequiredArgsConstructor(access = AccessLevel.PRIVATE) @ToString
public class PresentationModelAggregate implements Aggregate
  {
    @Nonnull
    private final Aggregate delegate;

    /*******************************************************************************************************************
     *
     * Creates a new, empty instance.
     *
     * @return          the new instance
     *
     ******************************************************************************************************************/
    @Nonnull
    public static PresentationModelAggregate newInstance()
      {
        return new PresentationModelAggregate(Aggregate.newInstance());
      }

    /*******************************************************************************************************************
     *
     * Adds another {@link PresentationModel} with the given roles, associated to the given name. With a plain
     * {@link Aggregate}{@code } the code would be:
     *
     *      *   Aggregate<PresentationModel> aggregate = Aggregate.newInstance()
     *            .with("name", PresentationModel.of("", r(role1, role2, role3));
     * 
     *
     * The simplified code is:
     *
     *      *   Aggregate<PresentationModel> aggregate = PresentationModelAggregate.newInstance()
     *            .withPmOf("name", r(role1, role2, role3));
     * 
     *
     * @param   name    the name of the {@code PresentationModel}
     * @param   roles   the roles
     * @return          the new {@code PresentationModel}
     *
     ******************************************************************************************************************/
    @Nonnull
    public PresentationModelAggregate withPmOf (@Nonnull final String name, @Nonnull final Collection