import java.io.File;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

public class ResourceLoader {

private final String configFilePath;

private final Map<String, List<String>> resourceMap = new HashMap<>();

public ResourceLoader(String configFilePath) {

this.configFilePath = configFilePath;

loadResources();

}

private void loadResources() {

File configFile = new File(configFilePath);

if (!configFile.exists()) {

throw new IllegalArgumentException("Config file not found: " + configFilePath);

}

// Assuming config file is a simple key-value pair (e.g., key=resource1,resource2)

try {

java.io.BufferedReader reader = new java.io.FileReader(configFile);

String line;

while ((line = reader.readLine()) != null) {

String[] parts = line.split("=");

if (parts.length == 2) {

String key = parts[0].trim();

String resourcesStr = parts[1].trim();

List<String> resources = new ArrayList<>();

resources.addAll(List.of(resourcesStr.split(","))); // Split by comma

resourceMap.put(key, resources);

}

}

reader.close();

} catch (Exception e) {

throw new RuntimeException("Error loading resources from config file: " + e.getMessage(), e);

}

}

public List<String> getResources(String key) {

return resourceMap.getOrDefault(key, new ArrayList<>()); // Return empty list if key not found

}

public static void main(String[] args) {

//Example Usage:

String configPath = "config.txt";

// Create a sample config file for testing

File configFile = new File(configPath);

try {

java.io.FileWriter writer = new java.io.FileWriter(configFile);

writer.write("images=image1.png,image2.jpg\n");

writer.write("fonts=fontA.ttf,fontB.otf\n");

writer.close();

} catch (Exception e) {

System.err.println("Error creating sample config file: " + e.getMessage());

return;

}

ResourceLoader loader = new ResourceLoader(configPath);

List<String> images = loader.getResources("images");

System.out.println("Images: " + images); //Expected output: Images: [image1.png, image2.jpg]

List<String> fonts = loader.getResources("fonts");

System.out.println("Fonts: " + fonts); //Expected output: Fonts: [fontA.ttf, fontB.otf]

List<String> nonExistent = loader.getResources("nonExistent");

System.out.println("Non existent: " + nonExistent); //Expected output: Non existent: []

}

}