Facade Pattern
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The facade pattern is used to simplifies to the complex system by providing a general interface or unified, which is a higher layer to these subsystems.
Benefit and use of the Facade Pattern
- Facade is used to reduce complexity of a system.
- It is reduce subsystem dependency, Decouple subsystems and improve portability.
- It is used to Make an entry point to your subsystems.
- Use in Minimization of the communication and dependency between subsystems.
- Also used in Security and performance consideration.
Example
//Create the interface
package r4r;
public interface general {
public void accessGeneral();
}
interface Special extends general {
public void accessSpecial();
}
interface Private extends general {
public void accessPrivate();
}
//Create the class and implement the interface
package r4r;
class GeneralInfo implements general {
public void accessGeneral() {
System.out.println("Hello this is General information");
}
}
class SpecialInfo implements Special{
public void accessSpecial() {
System.out.println("This is special infornation connected people");
}
public void accessGeneral() {}
}
class PrivateInfo extends SpecialInfo implements Private, Special {
public void accessPrivate() {
System.out.println("This is private information private people connected");
}
// public void accessSpecial() {
//System.out.println("Welcome");
// }
public void accessGeneral() {
System.out.println("General people now connected");
}
}
public class facadetest {
public static void main(String[] args)
{
GeneralInfo g1=new GeneralInfo();
SpecialInfo s1=new SpecialInfo();
PrivateInfo p1=new PrivateInfo();
p1.accessPrivate();
p1.accessGeneral();
p1.accessSpecial();
}
}
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