From 7b3df49422968e9ac284304874cbdfe436894d84 Mon Sep 17 00:00:00 2001
From: rileyJones <rileyjones109@gmail.com>
Date: Thu, 27 Jul 2017 14:33:08 -0700
Subject: [PATCH] Jar Plugin Loader

---
 src/org/nwapw/abacus/plugin/ClassFinder.java | 65 ++++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100644 src/org/nwapw/abacus/plugin/ClassFinder.java

diff --git a/src/org/nwapw/abacus/plugin/ClassFinder.java b/src/org/nwapw/abacus/plugin/ClassFinder.java
new file mode 100644
index 0000000..c914f3d
--- /dev/null
+++ b/src/org/nwapw/abacus/plugin/ClassFinder.java
@@ -0,0 +1,65 @@
+package org.nwapw.abacus.plugin;
+
+import java.io.BufferedInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Enumeration;
+import java.util.HashMap;
+import java.util.jar.JarEntry;
+import java.util.jar.JarFile;
+import java.util.zip.ZipInputStream;
+
+public class ClassFinder extends ClassLoader{
+
+    ArrayList<Class> classes;
+
+    public ClassFinder(){
+        super(ClassFinder.class.getClassLoader());
+        classes=new ArrayList();
+    }
+    public Class loadClass(String className) throws ClassNotFoundException{
+        return findClass(className);
+    }
+    public ArrayList<String> loadClass(File jarLocation) throws ClassNotFoundException, IOException{
+        return addJar(jarLocation);
+    }
+    public ArrayList<String> addJar(File jarLocation) throws IOException {
+        JarFile jarFolder = new JarFile(jarLocation);
+        Enumeration jarList = jarFolder.entries();
+        HashMap classSize = new HashMap();
+        HashMap classContent = new HashMap();
+        ArrayList<String> classNames = new ArrayList();
+        JarEntry tempJar;
+        ZipInputStream zipStream = new ZipInputStream(new BufferedInputStream(new FileInputStream(jarLocation)));
+        while(jarList.hasMoreElements()){
+            tempJar = (JarEntry)jarList.nextElement();
+            zipStream.getNextEntry();
+            if(!tempJar.isDirectory()) {
+                if (tempJar.getName().substring(tempJar.getName().indexOf('.')).equals(".class") && (tempJar.getName().length() < 9 || !tempJar.getName().substring(0, 9).equals("META-INF/"))) {
+                    int size = (int)tempJar.getSize();
+                    classSize.put(tempJar.getName(),new Integer((int)tempJar.getSize()));
+                    byte[] bytes = new byte[size];
+                    zipStream.read(bytes,0,size);
+                    classContent.put(tempJar.getName(),bytes);
+                    classNames.add(tempJar.getName());
+                }
+            }
+        }
+        jarFolder.close();
+        for(String name:classNames) {
+            classes.add(super.defineClass(name, (byte[]) classContent.get(name), 0, (int) classSize.get(name)));
+        }
+        return classNames;
+    }
+    public ArrayList<Class> getClasses(){
+        return classes;
+    }
+    public Class getClass(int number){
+        return classes.get(number);
+    }
+    public void delClasses(){
+        classes=new ArrayList();
+    }
+}
\ No newline at end of file