How to install SJDB

[DEMnetwork]

How to install SJDB:

There are a few methods to install SJDB

Maven

Step 1: Include SJDB to your pom.xml file:

<dependency>
  <groupId>io.github.demnetwork</groupId>
  <artifactId>sjdb</artifactId>
  <version>1.0.0</version>
</dependency>

Step 2: Install via command line:

mvn install 

Classpath

Step 1: Download SJDB here

Step 2: Add sjdb.jar to your project's classpath . This involves adding it to your IDE's project settings or specifying it on the command line when compiling and running your Java code (see examples below).

Step 3: Complie & Execute code:

• Compilation:

javac -cp "path/to/sjdb-1.0.0.jar:." YourClass.java

• Execution:

java -cp "path/to/sjdb-1.0.0.jar:." YourClass

Reflection

Step 1: Download SJDB here

Step 2: Move your SJDB to ./SJDB/ (optional)

Step 3: Create the code(the snippet below supposes the sjdb.jar is at ./SJDB/sjdb.jar):

import java.io.*;
import java.lang.reflect.*;
import java.net.*;
import java.util.*;

public class Main {

        private static int bn = 0;

        public static void main(String[] args) throws Exception {
                File f = new File("./SJDB/sjdb.jar"); // Get File Object
                if (!f.exists()) {
                    throw new Error("Cannot find SJDB jar file"); // Throw error if file is not found
                }
                URLClassLoader cl = new URLClassLoader(new URL[] { f.toURI().toURL() }); // Create a class loader
                Class<?> runtimeClass = cl.loadClass("io.github.demnetwork.sjdb.internal.SJDBRuntime"); // Get the SJDBRuntime class
                bn = ((Integer) runtimeClass.getMethod("getBuildNumber").invoke(null)).intValue(); // Get the Build Number from SJDBRuntime
                if (bn != 1) {
                    cl.close(); // Close URLClassLoader
                    throw new Error("Incompatible SJDB Version."); // Throw error due to incompatible version
                }
                //Load classes
                Class<?> databaseManagerClazz = cl.loadClass("io.github.demnetwork.sjdb.DatabaseManager"); // Example: Loads Database manager class
                //Do something
                Object databaseManager = databaseManagerClazz.getConstructor().newInstance(); // Example: Creation of DatabaseManager instance
                Object dataBase = databaseManagerClazz.getMethod("access", String.class, String.class, String.class).invoke(databaseManager, "path/to/database.sdb", "Username", "password"); // Access the database
        }
}

Step 4 Compile & Execute:

• Compile:

javac Main.java

• Execution:

java Main