/******************************************************************************

  * Classes.java - Class utilities.

  * 

  * PicMan - The BuckoSoft Picture Manager in Java

  * Copyright(c) 2008 - Dick Balaska

  * 

  */

 package com.buckosoft.PicMan.business.util;

 import java.io.File;

 import java.util.ArrayList;

 /** Class utilities.

  * @author Dick Balaska

  * @since 2008/09/20

  * @see <a href="http://cvs.buckosoft.com/Projects/java/PicMan/PicMan/src/com/buckosoft/PicMan/business/util/Classes.java">Classes.java</a>

  */

 public class Classes {

         /** List Classes inside a given package.

          * <br>

          * author Jon Peck http://jonpeck.com (adapted from http://www.javaworld.com/javaworld/javatips/jw-javatip113.html)

          * @param pckgname String name of a Package, EG "java.lang"

          * @return Class[] classes inside the root of the given package

          * @throws ClassNotFoundException if the Package is invalid

          */

         public static String[] getClasses(String pckgname) /*throws ClassNotFoundException*/ {

                 ArrayList<String> classes=new ArrayList<String>();

                 // Get a File object for the package

                 File directory=null;

                 try {

                         directory=new File(Thread.currentThread().getContextClassLoader().getResource('/'+pckgname.replace('.', '/')).getFile());

                 } catch(NullPointerException x) {

                         //throw new ClassNotFoundException(pckgname+" does not appear to be a valid package");

                 }

                 if(directory.exists()) {

                         // Get the list of the files contained in the package

                         String[] files=directory.list();

                         for(int i=0; i<files.length; i++) {

                                 // we are only interested in .class files

                                 if(files[i].endsWith(".class")) {

                                         // removes the .class extension

                                         //classes.add(Class.forName(pckgname+'.'+files[i].substring(0, files[i].length()-6)));

                                         classes.add(files[i].substring(0, files[i].length()-6));

                                 }

                         }

                 } else {

                         //throw new ClassNotFoundException(pckgname+" does not appear to be a valid package");

                 }

                 String[] ss = new String[classes.size()];

                 classes.toArray(ss);

                 return(ss);

         }        

 }