Add classgetter

src/me/libraryaddict/disguise/utilities/ClassGetter.java

@@ -0,0 +1,72 @@
+package me.libraryaddict.disguise.utilities;
+
+import org.bukkit.entity.Entity;
+
+import java.io.IOException;
+import java.net.URL;
+import java.security.CodeSource;
+import java.util.ArrayList;
+import java.util.Enumeration;
+import java.util.jar.JarEntry;
+import java.util.jar.JarFile;
+
+/**
+ * User: Austin Date: 4/22/13 Time: 11:47 PM (c) lazertester
+ */
+
+// Code for this taken and slightly modified from
+// https://github.com/ddopson/java-class-enumerator
+public class ClassGetter {
+
+    public static ArrayList<Class<?>> getClassesForPackage(String pkgname) {
+        ArrayList<Class<?>> classes = new ArrayList<Class<?>>();
+        // String relPath = pkgname.replace('.', '/');
+
+        // Get a File object for the package
+        CodeSource src = Entity.class.getProtectionDomain().getCodeSource();
+        if (src != null) {
+            URL resource = src.getLocation();
+            resource.getPath();
+            processJarfile(resource, pkgname, classes);
+        }
+        return classes;
+    }
+
+    private static Class<?> loadClass(String className) {
+        try {
+            return Class.forName(className);
+        } catch (ClassNotFoundException e) {
+            throw new RuntimeException("Unexpected ClassNotFoundException loading class '" + className + "'");
+        } catch (NoClassDefFoundError e) {
+            return null;
+        }
+    }
+
+    private static void processJarfile(URL resource, String pkgname, ArrayList<Class<?>> classes) {
+        String relPath = pkgname.replace('.', '/');
+        String resPath = resource.getPath().replace("%20", " ");
+        String jarPath = resPath.replaceFirst("[.]jar[!].*", ".jar").replaceFirst("file:", "");
+        JarFile jarFile;
+        try {
+            jarFile = new JarFile(jarPath);
+        } catch (IOException e) {
+            throw new RuntimeException("Unexpected IOException reading JAR File '" + jarPath
+                    + "'. Do you have strange characters in your folders? Such as #?", e);
+        }
+        Enumeration<JarEntry> entries = jarFile.entries();
+        while (entries.hasMoreElements()) {
+            JarEntry entry = entries.nextElement();
+            String entryName = entry.getName();
+            String className = null;
+            if (entryName.endsWith(".class") && entryName.startsWith(relPath)
+                    && entryName.length() > (relPath.length() + "/".length())) {
+                className = entryName.replace('/', '.').replace('\\', '.').replace(".class", "");
+            }
+            if (className != null) {
+                Class<?> c = loadClass(className);
+                if (c != null)
+                    classes.add(c);
+            }
+        }
+    }
+}