A utility class for loading and listing classes from a package.

ClassUtils.java

package org.odysseus.util;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

/**
 * A utility class for classes.
 * 
 * @author Jimmy Frix
 */
public class ClassUtils {

    /**
     * Finds all of the classes from a specified package, loads them, and adds them to a list to
     * return.
     * 
     * @param packageName
     *            The package to list the classes from.
     * @return The list of classes from the package.
     * @throws ClassNotFoundException
     */
    public static List<Class<?>> listClassesFromPackage(String packageName)
            throws ClassNotFoundException {
        List<Class<?>> list = new ArrayList<>();
        File file = new File("./bin/" + packageName.replace('.', '/') + "/");
        if (file.exists() && file.isDirectory()) {
            for (File f : file.listFiles()) {
                if (f.getName().endsWith(".class")) {
                    list.add(Class.forName(packageName + "."
                            + f.getName().substring(0, f.getName().length() - 6)));
                }
            }
        }
        return list;
    }

    /**
     * Loads all classes for a specified package.
     * 
     * @param packageName
     *            The package to loads the classes from.
     * @throws ClassNotFoundException
     */
    public static void loadClassesFromPackage(String packageName) throws ClassNotFoundException {
        File file = new File("./bin/" + packageName.replace('.', '/') + "/");
        if (file.exists() && file.isDirectory()) {
            for (File f : file.listFiles()) {
                if (f.getName().endsWith(".class")) {
                    Class.forName(packageName + "."
                            + f.getName().substring(0, f.getName().length() - 6));
                }
            }
        }
    }

}