Ybadoo - Soluções em Software Livre
Tutoriais
Programação Orientada a Objetos

Para exercitar a utilização do padrão de projeto Abstract Factory, desenvolva uma fábrica de automóveis.

O cliente é um motorista.

Ele solicita à fábrica a criação de um automóvel que tem um motor e pneus.

O cliente entra no automóvel, liga o motor, e eventualmente fura um pneu.

A AbstractFactory cria automóveis (AbstractProduct) com os pneus e motores.

As ConcreteFactory são Volkswagen e Ford, que criam automóveis (ConcreteProduct) Gol e Ka, respectivamente.

Os pneus da Volkswagen são Goodyear, enquanto os pneus da Ford são Firestone.

O motor Volkswagen é AP, enquanto que a Ford usa CHT.

Quando o motorista entra no Gol ele faz um barulho BRUM!, enquanto que o Ka faz um barulho TREM!.

O motor AP faz um barulho AP Ligado, enquanto que o motor CHT faz um barulho CHT ligado.

O pneu Goodyear quando fura faz um barulho Chash!, enquanto que o pneu Firestone quando fura faz um barulho TCHEEE!.

 

Arquivo Motor.java

/**
 * Copyright (C) 2009/2018 - Cristiano Lehrer (cristiano@ybadoo.com.br)
 *                  Ybadoo - Solucoes em Software Livre (www.ybadoo.com.br)
 *
 * Permission is granted to copy, distribute and/or modify this document
 * under the terms of the GNU Free Documentation License, Version 1.3
 * or any later version published by the Free Software Foundation; with
 * no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
 * A copy of the license is included in the section entitled "GNU
 * Free Documentation License".
 */

package com.ybadoo.tutoriais.poo;

/**
 * AbstractProduct
 */
public interface Motor
{
  /**
   * Retornar o tipo do motor
   * 
   * @return tipo do motor
   */
  public String getTipo();

  /**
   * Ligar o motor
   * 
   * @return barulho ao ligar o motor
   */
  public String ligar();
}

Arquivo AP.java

/**
 * Copyright (C) 2009/2018 - Cristiano Lehrer (cristiano@ybadoo.com.br)
 *                  Ybadoo - Solucoes em Software Livre (www.ybadoo.com.br)
 *
 * Permission is granted to copy, distribute and/or modify this document
 * under the terms of the GNU Free Documentation License, Version 1.3
 * or any later version published by the Free Software Foundation; with
 * no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
 * A copy of the license is included in the section entitled "GNU
 * Free Documentation License".
 */

package com.ybadoo.tutoriais.poo;

/**
 * Product
 */
public class AP implements Motor
{
  /* (non-Javadoc)
   * @see Motor#getTipo()
   */
  public String getTipo()
  {
    return "AP";
  }

  /* (non-Javadoc)
   * @see Motor#ligar()
   */
  public String ligar()
  {
    return "AP Ligado";
  }
}

Arquivo CHT.java

/**
 * Copyright (C) 2009/2018 - Cristiano Lehrer (cristiano@ybadoo.com.br)
 *                  Ybadoo - Solucoes em Software Livre (www.ybadoo.com.br)
 *
 * Permission is granted to copy, distribute and/or modify this document
 * under the terms of the GNU Free Documentation License, Version 1.3
 * or any later version published by the Free Software Foundation; with
 * no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
 * A copy of the license is included in the section entitled "GNU
 * Free Documentation License".
 */

package com.ybadoo.tutoriais.poo;

/**
 * Product
 */
public class CHT implements Motor
{
  /* (non-Javadoc)
   * @see Motor#getTipo()
   */
  public String getTipo()
  {
    return "CHT";
  }

  /* (non-Javadoc)
   * @see Motor#ligar()
   */
  public String ligar()
  {
    return "CHT Ligado";
  }
}

Arquivo Pneus.java

/**
 * Copyright (C) 2009/2018 - Cristiano Lehrer (cristiano@ybadoo.com.br)
 *                  Ybadoo - Solucoes em Software Livre (www.ybadoo.com.br)
 *
 * Permission is granted to copy, distribute and/or modify this document
 * under the terms of the GNU Free Documentation License, Version 1.3
 * or any later version published by the Free Software Foundation; with
 * no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
 * A copy of the license is included in the section entitled "GNU
 * Free Documentation License".
 */

package com.ybadoo.tutoriais.poo;

/**
 * AbstractProduct
 */
public interface Pneus
{
  /**
   * Furar o pneu
   * 
   * @return barrulho quando o pneu fura
   */
  public String furar();

  /**
   * Retornar o fabricante do pneu
   * 
   * @return fabricante do pneu
   */
  public String getFabricante();
}

Arquivo Firestone.java

/**
 * Copyright (C) 2009/2018 - Cristiano Lehrer (cristiano@ybadoo.com.br)
 *                  Ybadoo - Solucoes em Software Livre (www.ybadoo.com.br)
 *
 * Permission is granted to copy, distribute and/or modify this document
 * under the terms of the GNU Free Documentation License, Version 1.3
 * or any later version published by the Free Software Foundation; with
 * no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
 * A copy of the license is included in the section entitled "GNU
 * Free Documentation License".
 */

package com.ybadoo.tutoriais.poo;

/**
 * Product
 */
public class Firestone implements Pneus
{
  /* (non-Javadoc)
   * @see Pneus#furar()
   */
  public String furar()
  {
    return "TCHEEE!";
  }

  /* (non-Javadoc)
   * @see Pneus#getFabricante()
   */
  public String getFabricante()
  {
    return "Firestone";
  }
}

Arquivo Goodyear.java

/**
 * Copyright (C) 2009/2018 - Cristiano Lehrer (cristiano@ybadoo.com.br)
 *                  Ybadoo - Solucoes em Software Livre (www.ybadoo.com.br)
 *
 * Permission is granted to copy, distribute and/or modify this document
 * under the terms of the GNU Free Documentation License, Version 1.3
 * or any later version published by the Free Software Foundation; with
 * no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
 * A copy of the license is included in the section entitled "GNU
 * Free Documentation License".
 */

package com.ybadoo.tutoriais.poo;

/**
 * Product
 */
public class Goodyear implements Pneus
{
  /* (non-Javadoc)
   * @see abstractFactory.Pneus#furar()
   */
  public String furar()
  {
    return "Chash!";
  }

  /* (non-Javadoc)
   * @see abstractFactory.Pneus#getFabricante()
   */
  public String getFabricante()
  {
    return "Goodyear";
  }
}

Arquivo Montadora.java

/**
 * Copyright (C) 2009/2018 - Cristiano Lehrer (cristiano@ybadoo.com.br)
 *                  Ybadoo - Solucoes em Software Livre (www.ybadoo.com.br)
 *
 * Permission is granted to copy, distribute and/or modify this document
 * under the terms of the GNU Free Documentation License, Version 1.3
 * or any later version published by the Free Software Foundation; with
 * no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
 * A copy of the license is included in the section entitled "GNU
 * Free Documentation License".
 */

package com.ybadoo.tutoriais.poo;

/**
 * AbstractFactory
 */
public abstract class Montadora
{
  /**
   * Retornar a fabrica concreta desejada
   * 
   * @param fabricante fabricante de automoveis
   * @return fabrica concreta
   */
  public static Montadora getFabricante(String fabricante)
  {
    if("Ford".equals(fabricante))
    {
      return new Ford();
    }

    return new Volkswagen();
  }

  /**
   * Retornar o motor do automovel
   * 
   * @return motor do automovel
   */
  public abstract Motor getMotor();

  /**
   * Retornar os pneus do automovel
   * 
   * @return pneus do automovel
   */
  public abstract Pneus getPneus();
}

Arquivo Ford.java

/**
 * Copyright (C) 2009/2018 - Cristiano Lehrer (cristiano@ybadoo.com.br)
 *                  Ybadoo - Solucoes em Software Livre (www.ybadoo.com.br)
 *
 * Permission is granted to copy, distribute and/or modify this document
 * under the terms of the GNU Free Documentation License, Version 1.3
 * or any later version published by the Free Software Foundation; with
 * no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
 * A copy of the license is included in the section entitled "GNU
 * Free Documentation License".
 */

package com.ybadoo.tutoriais.poo;

/**
 * ConcreteFactory
 */
public class Ford extends Montadora
{
  /* (non-Javadoc)
   * @see Montadora#getMotor()
   */
  public Motor getMotor()
  {
    return new CHT();
  }

  /* (non-Javadoc)
   * @see Montadora#getPneus()
   */
  public Pneus getPneus()
  {
    return new Firestone();
  }
}

Arquivo Volkswagen.java

/**
 * Copyright (C) 2009/2018 - Cristiano Lehrer (cristiano@ybadoo.com.br)
 *                  Ybadoo - Solucoes em Software Livre (www.ybadoo.com.br)
 *
 * Permission is granted to copy, distribute and/or modify this document
 * under the terms of the GNU Free Documentation License, Version 1.3
 * or any later version published by the Free Software Foundation; with
 * no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
 * A copy of the license is included in the section entitled "GNU
 * Free Documentation License".
 */

package com.ybadoo.tutoriais.poo;

/**
 * ConcreteFactory
 */
public class Volkswagen extends Montadora
{
  /* (non-Javadoc)
   * @see Montadora#getMotor()
   */
  public Motor getMotor()
  {
    return new AP();
  }

  /* (non-Javadoc)
   * @see Montadora#getPneus()
   */
  public Pneus getPneus()
  {
    return new Goodyear();
  }
}

Arquivo Cliente.java

/**
 * Copyright (C) 2009/2018 - Cristiano Lehrer (cristiano@ybadoo.com.br)
 *                  Ybadoo - Solucoes em Software Livre (www.ybadoo.com.br)
 *
 * Permission is granted to copy, distribute and/or modify this document
 * under the terms of the GNU Free Documentation License, Version 1.3
 * or any later version published by the Free Software Foundation; with
 * no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
 * A copy of the license is included in the section entitled "GNU
 * Free Documentation License".
 */

package com.ybadoo.tutoriais.poo;

/**
 * Client
 */
public class Cliente
{
  /**
   * Metodo principal da linguagem de programacao Java
   * 
   * @param args argumentos da linha de comando (nao utilizado)
   */
  public static void main(String[] args)
  {
    Montadora montadora = Montadora.getFabricante("Volkswagen");

    System.out.println("Volkswagen"); // Volkswagen

    Motor motor = montadora.getMotor();
    System.out.println(motor.getTipo()); // AP
    System.out.println(motor.ligar()); // AP Ligado

    Pneus pneus = montadora.getPneus();
    System.out.println(pneus.getFabricante()); // Goodyear
    System.out.println(pneus.furar()); // Chash!

    montadora = Montadora.getFabricante("Ford");

    System.out.println("Ford"); // Ford

    motor = montadora.getMotor();
    System.out.println(motor.getTipo()); // CHT
    System.out.println(motor.ligar()); // CHT Ligado

    pneus = montadora.getPneus();
    System.out.println(pneus.getFabricante()); // Firestone
    System.out.println(pneus.furar()); // TCHEEE!
  }
}