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Facade Design Pattern

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Deepika Sahu answered on December 30, 2022 Popularity 10/10 Helpfulness 1/10

answer Facade Design Pattern

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Facade Design Pattern

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import javax.activation.DataSource;
 
public class ReportGeneratorFacade 
{
  public static void generateReport(ReportType type, DataSource dataSource, String location) 
  {
    if(type == null || dataSource == null) 
    {
      //throw some exception
    }
    //Create report
    Report report = new Report();
     
    report.setHeader(new ReportHeader());
    report.setFooter(new ReportFooter());
     
    //Get data from dataSource and set to ReportData object
     
    report.setData(new ReportData());
     
    //Write report
    ReportWriter writer = new ReportWriter();
    switch(type) 
    {
      case HTML:
        writer.writeHtmlReport(report, location);
        break;
         
      case PDF:
        writer.writePdfReport(report, location);
        break;
    }
  }
}

Popularity 10/10 Helpfulness 1/10 Language java

Source: howtodoinjava.com

Tags: facade java

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Contributed on Dec 30 2022

Deepika Sahu

0 Answers Avg Quality 2/10

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façade design pattern

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5. Façade:
The Façade pattern provides a simplified, higher-level interface to a set of interfaces in a subsystem. It hides the complexity of the subsystem.

Example in ReactJS:

Suppose you have a complex state management system, and you want to simplify its usage for a component.


// ComplexState.js
const ComplexState = () => {
  const [value, setValue] = useState(0);

  const increment = () => {
    setValue(value + 1);
  };

  const decrement = () => {
    setValue(value - 1);
  };

  return {
    value,
    increment,
    decrement,
  };
};

// Usage
const App = () => {
  const state = ComplexState();

  return (
    <div>
      <p>Value: {state.value}</p>
      <button onClick={state.increment}>Increment</button>
      <button onClick={state.decrement}>Decrement</button>
    </div>
  );
};

Popularity 10/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: facade fa

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Contributed on Sep 05 2023

Amjad Saeed

0 Answers Avg Quality 2/10

Facade pattern

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// SubsystemA with its own set of classes
public class SubsystemA
{
    public void OperationA()
    {
        Console.WriteLine("SubsystemA: OperationA");
    }
}

// SubsystemB with its own set of classes
public class SubsystemB
{
    public void OperationB()
    {
        Console.WriteLine("SubsystemB: OperationB");
    }
}

// SubsystemC with its own set of classes
public class SubsystemC
{
    public void OperationC()
    {
        Console.WriteLine("SubsystemC: OperationC");
    }
}

// Facade class providing a unified interface to the subsystems
public class Facade
{
    private readonly SubsystemA subsystemA;
    private readonly SubsystemB subsystemB;
    private readonly SubsystemC subsystemC;

    public Facade()
    {
        subsystemA = new SubsystemA();
        subsystemB = new SubsystemB();
        subsystemC = new SubsystemC();
    }

    // Simplified interface methods that use the subsystems internally
    public void Operation1()
    {
        Console.WriteLine("Facade: Operation1");
        subsystemA.OperationA();
        subsystemB.OperationB();
    }

    public void Operation2()
    {
        Console.WriteLine("Facade: Operation2");
        subsystemB.OperationB();
        subsystemC.OperationC();
    }
}

class Program
{
    static void Main()
    {
        // Client code interacts with the Facade, which internally interacts with the subsystems
        Facade facade = new Facade();
        facade.Operation1();
        facade.Operation2();
    }
}

Popularity 10/10 Helpfulness 1/10 Language csharp

Source: chat.openai.com

Tags: c# c

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Contributed on Jul 30 2023

mahnaz foroutan

0 Answers Avg Quality 2/10

Facade Design Pattern

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