[Solved][1.14.4] Get all files in specific folder

[Croa]

Currently, I have everything working in a dev environment where all java files are discovered in a certain folder and assigned to variables. My issue is locating the files in a compiled jar. Obviously, the path needs to change since the files are no longer java sources. I am unaware what exactly needs to be changed to what. I have searched for anything directory and path related, but have been unable to locate a solution so far. What steps do I need to take to find class files without importing? The entire purpose is to be modular so that any class (within the jar) in "com/zombe/zombecore/mods" can be removed or added.

 

modNums = Paths.get("src/main/java/com/zombe/zombecore/mods").toFile().exists() ? Paths.get("src/main/java/com/zombe/zombecore/mods").toFile().list().length : 0;//count the number of files in "com/zombe/zombecore/mods"
modFiles = Paths.get("src/main/java/com/zombe/zombecore/mods").toFile().listFiles();//list of files in the directory
try {
	for(int i =0; i < modNums; i++) {
		mod[i] = Class.forName("com.zombe.zombecore.mods."+modFiles[i].toString().substring(39, modFiles[i].toString().length()).replaceAll(".java", "").replaceAll(".class", ""));//assign each result to a class variable
	}
			
} catch (ClassNotFoundException e) {
	System.out.println(e);
}

 

Edited March 27, 2020 by Croa

[DaemonUmbra]

If you want to be modular then do it with jars instead of classes

[Croa]

If I am ultimately reading from another jar file, I still need a path to identify and assign each file to a variable. Do you have an example how this will work or even terms to begin a search? 

[TheGreyGhost]

Howdy

 

This might be promising?

https://stackoverflow.com/questions/17421590/iterate-over-folders-in-jar-file-directly

 

Java also has a stack of Reflection methods that would probably be suitable to iterate through a jar.

 

You might also get some clues from the Forge mod loading code, which (from a very quick look) appears to put a wrapper around a jar so that it appears to be a filesystem

see AbstractJarFileLocator

 

-TGG

[DaemonUmbra]

You do know what your mod can use the code of pretty much any properly labelled jar in the mods folder, right?

[Croa]

Thanks for your assistance Umbra and Ghost. Here is ultimately what I got to work.

try {
	URI uri = ZombeCore.class.getClassLoader().getResource("com/zombe/zombecore/mods").toURI();
	Path myPath;
	if (uri.getScheme().equals("modjar")) {
		System.out.println(" | Jar loaded | ");

		JarFile jarFile = new JarFile(Minecraft.getInstance().gameDir+"/mods/"+NAME+"-"+VERSION+".jar");
		final Enumeration<JarEntry> entries = jarFile.entries();

		while(entries.hasMoreElements()) {
			JarEntry entry = (JarEntry)entries.nextElement();
			String name = entry.getName();
			if(name.startsWith("com/zombe/zombecore/mods/Z") && name.endsWith(".class"))
				arrMods.add(Class.forName(name.replaceAll("/", ".").replaceAll(".class", "")));
		}
	} else {
		System.out.println(" | Source loaded | ");
		myPath = Paths.get(uri);
		Stream<Path> walk = Files.walk(myPath, 1);
		int temp = 0;
		for (Iterator<Path> it = walk.iterator(); it.hasNext();){
			if(temp ==0) {
				it.next(); temp = 1;
			}
			arrMods.add(Class.forName("com.zombe.zombecore.mods."+it.next().getFileName().toString().replaceAll(".class", "")));
		}walk.close();
	}

}catch (URISyntaxException e) {}catch (IOException e) {}catch (ClassNotFoundException e) {}