Added class finder using package name.

src/main/java/com/realtimetech/reflection/classfile/ClassFinder.java

@@ -0,0 +1,49 @@
+package com.realtimetech.reflection.classfile;
+
+import java.io.File;
+import java.io.IOException;
+import java.net.URL;
+import java.util.Enumeration;
+import java.util.LinkedList;
+import java.util.List;
+
+public class ClassFinder {
+	private static void recursiveSearch(File directory, String packageName, List<Class<?>> resultClasses) throws ClassNotFoundException {
+		if (directory.exists()) {
+			File[] files = directory.listFiles();
+			for (File file : files) {
+				if (file.isDirectory()) {
+					recursiveSearch(file, packageName + "." + file.getName(), resultClasses);
+				} else if (file.getName().endsWith(".class")) {
+					resultClasses.add(Class.forName(packageName + '.' + file.getName().substring(0, file.getName().length() - 6)));
+				}
+			}
+		}
+	}
+
+	public static Class<?>[] getClassInPackages(Class<?> packageInClass) throws IOException {
+		return getClassInPackages(packageInClass.getPackageName());
+	}
+
+	public static Class<?>[] getClassInPackages(String packageName) throws IOException {
+		String path = packageName.replace('.', '/');
+		Enumeration<URL> resources = ClassFinder.class.getClassLoader().getResources(path);
+		List<File> directories = new LinkedList<File>();
+
+		while (resources.hasMoreElements()) {
+			URL resource = resources.nextElement();
+			directories.add(new File(resource.getFile()));
+		}
+
+		LinkedList<Class<?>> resultClasses = new LinkedList<Class<?>>();
+
+		for (File directory : directories) {
+			try {
+				recursiveSearch(directory, packageName, resultClasses);
+			} catch (ClassNotFoundException e) {
+			}
+		}
+
+		return resultClasses.toArray(new Class<?>[resultClasses.size()]);
+	}
+}