Java Class Find getClassesInDirectory(File directory, String packageName, ClassLoader classLoader)

Description

get Classes In Directory

License

Apache License

Declaration

private static List<Class<?>> getClassesInDirectory(File directory, String packageName, ClassLoader classLoader)
            throws UnsupportedEncodingException 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.io.File;

import java.io.UnsupportedEncodingException;

import java.net.URL;
import java.net.URLDecoder;
import java.util.ArrayList;

import java.util.List;

public class Main {
    private static List<Class<?>> getClassesInDirectory(File directory, String packageName, ClassLoader classLoader)
            throws UnsupportedEncodingException {
        List<Class<?>> classes = new ArrayList<Class<?>>();
        // Capture all the .class files in this directory
        // Get the list of the files contained in the package
        String[] files = directory.list();
        for (String currentFile : files) {
            // we are only interested in .class files
            if (currentFile.endsWith(".class")) {
                // removes the .class extension
                // CHECKSTYLE:OFF
                try {
                    String className = packageName + '.' + currentFile.substring(0, currentFile.length() - 6);
                    classes.add(loadClass(className, classLoader));
                } catch (Throwable e) {
                    // do nothing. this class hasn't been found by the loader, and we don't care.
                }// w w w . j  av  a 2  s .c o m
                // CHECKSTYLE:ON
            } else {
                // It's another package
                String subPackageName = packageName + '.' + currentFile;
                // Ask for all resources for the path
                URL resource = classLoader.getResource(subPackageName.replace('.', '/'));
                File subDirectory = new File(URLDecoder.decode(resource.getPath(), "UTF-8"));
                List<Class<?>> classesForSubPackage = getClassesInDirectory(subDirectory, subPackageName,
                        classLoader);
                classes.addAll(classesForSubPackage);
            }
        }
        return classes;
    }

    private static Class<?> loadClass(String className, ClassLoader classLoader) throws ClassNotFoundException {
        return Class.forName(className, true, classLoader);
    }
}

Related

1. getClasses(String pack)
2. getClasses(String pkgname, boolean flat)
3. getClassesAsList(String pckgname, Class type)
4. getClassesDir(Class classWithinDir)
5. getClassesExtending(Class rootClass, String pattern)
6. getClassesLocation(Class cls)
7. getClassesWithInterface(String packageName, Class interfaceClazz)