Patron Factory

.idea/vcs.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file

src/main/java/org/example/designpatterns/factory/App.java

+package org.example.designpatterns.factory;
+
+import org.example.designpatterns.factory.interfaces.IConnection;
+
+public class App {
+
+    public static void main(String[] args) {
+        ConnectionFactory factory = new ConnectionFactory();
+
+        IConnection cx1 = factory.getConnection("MYSQL");
+        cx1.conectar();
+        cx1.desconectar();
+
+        IConnection cx2 = factory.getConnection("POSTGRE");
+        cx2.conectar();
+        cx2.desconectar();
+
+        IConnection cx3 = factory.getConnection("H2");
+        cx3.conectar();
+        cx3.desconectar();
+    }
+}

src/main/java/org/example/designpatterns/factory/ConnectionFactory.java

+package org.example.designpatterns.factory;
+
+import org.example.designpatterns.factory.interfaces.IConnection;
+import org.example.designpatterns.factory.interfaces.impl.ConnectionMySQL;
+import org.example.designpatterns.factory.interfaces.impl.ConnectionPostgreSQL;
+import org.example.designpatterns.factory.interfaces.impl.ConnectionVacia;
+
+public class ConnectionFactory {
+
+    public IConnection getConnection(String motor) {
+        if (motor == null)
+            return new ConnectionVacia();
+        if (motor.equalsIgnoreCase("MYSQL"))
+            return new ConnectionMySQL();
+        else if (motor.equalsIgnoreCase("POSTGRE"))
+            return new ConnectionPostgreSQL();
+        return new ConnectionVacia();
+    }
+}

src/main/java/org/example/designpatterns/factory/interfaces/IConnection.java

+package org.example.designpatterns.factory.interfaces;
+
+public interface IConnection {
+
+    void conectar();
+    void desconectar();
+}

src/main/java/org/example/designpatterns/factory/interfaces/impl/ConnectionMySQL.java

+package org.example.designpatterns.factory.interfaces.impl;
+
+import org.example.designpatterns.factory.interfaces.IConnection;
+
+public class ConnectionMySQL implements IConnection {
+
+    private String host;
+    private String puerto;
+    private String usuario;
+    private String password;
+
+    public ConnectionMySQL() {
+        this.host = "localhost";
+        this.puerto = "3306";
+        this.usuario = "root";
+        this.password = "Jp0nt32023";
+    }
+
+    @Override
+    public void conectar() {
+        System.out.println("Se conécto a MySQL");
+    }
+
+    @Override
+    public void desconectar() {
+        System.out.println("Se desconécto de MySQL");
+    }
+
+    @Override
+    public String toString() {
+        return "ConnectionMySQL{" +
+                "host='" + host + '\'' +
+                ", puerto='" + puerto + '\'' +
+                ", usuario='" + usuario + '\'' +
+                ", password='" + password + '\'' +
+                '}';
+    }
+}

src/main/java/org/example/designpatterns/factory/interfaces/impl/ConnectionPostgreSQL.java

+package org.example.designpatterns.factory.interfaces.impl;
+
+import org.example.designpatterns.factory.interfaces.IConnection;
+
+public class ConnectionPostgreSQL implements IConnection {
+
+    private String host;
+    private String puerto;
+    private String usuario;
+    private String password;
+
+    public ConnectionPostgreSQL() {
+        this.host = "localhost";
+        this.puerto = "5433";
+        this.usuario = "postgres";
+        this.password = "Jp0nt32023";
+    }
+
+    @Override
+    public void conectar() {
+        System.out.println("Se conécto a PostgreSQL");
+    }
+
+    @Override
+    public void desconectar() {
+        System.out.println("Se desconécto de PostgreSQL");
+    }
+
+    @Override
+    public String toString() {
+        return "ConnectionPostgreSQL{" +
+                "host='" + host + '\'' +
+                ", puerto='" + puerto + '\'' +
+                ", usuario='" + usuario + '\'' +
+                ", password='" + password + '\'' +
+                '}';
+    }
+}

src/main/java/org/example/designpatterns/factory/interfaces/impl/ConnectionVacia.java

+package org.example.designpatterns.factory.interfaces.impl;
+
+import org.example.designpatterns.factory.interfaces.IConnection;
+
+public class ConnectionVacia implements IConnection {
+    @Override
+    public void conectar() {
+        System.out.println("No se especificó proveedor");
+    }
+
+    @Override
+    public void desconectar() {
+        System.out.println("No se especificó proveedor");
+    }
+}