[jboss-user] [EJB 3.0] - Re: Retrieve retrieve Entity Class mapping from jboss

[florian79]

I hava just a bad solution, but it would be greate to find something better:


  |     public static Class[] getClassesFromPackage(final String strPackageName) throws ClassNotFoundException
  |     {
  |         ArrayList<Class> classes = new ArrayList<Class>();
  |         // Get a File object for the package
  |         File directory = null;
  |         String[] files = null;
  |         try
  |         {
  |             ClassLoader cld = Thread.currentThread().getContextClassLoader();
  |             if (cld == null)
  |             {
  |                 throw new ClassNotFoundException("Can't get class loader.");
  |             }
  |             String path = strPackageName.replace('.', '/');
  |             //String path = '/' + pckgname.replace('.', '/');
  |             URL resource = cld.getResource(path);
  |             if (resource == null)
  |             {
  |                 throw new ClassNotFoundException("No resource for " + path);
  |             }
  |             if(resource.getPath().contains("!"))
  |             {
  |             	String[] arZipPath = resource.getPath().split("\\!");
  |             	if(arZipPath.length >= 1)
  |             	{
  |             		String strZipPath = arZipPath[0].substring(6);//cut up 'file:/'
  |             		try {
  | 						JarFile jarFile = new JarFile(new File(strZipPath));
  | 						List<String> lClassNames = new ArrayList<String>();
  | 						for ( Enumeration e = jarFile.entries(); e.hasMoreElements(); )
  | 						{
  | 							JarEntry target = (JarEntry) e.nextElement();
  | 							String strTargetName = target.getName();
  | 							if(strTargetName.endsWith(".class") && strTargetName.startsWith(path + "/") && !target.isDirectory())
  | 							{
  | 								String strClassName = strTargetName.substring(path.length()+1);
  | 								if(!strClassName.contains("/"))
  | 									lClassNames.add(strClassName);
  | 							}
  | 							
  | 						}
  | 						files = (String[])lClassNames.toArray(new String[lClassNames.size()]);
  | 					} 
  |             		catch (IOException e) 
  | 					{
  | 			            throw new ClassNotFoundException(strPackageName + " (" + strZipPath + ") does not appear to be a valid (JAR-) package");
  | 					}
  |             	}
  |             }
  |             else
  |             {
  |             	directory = new File(resource.getFile());
  |             	if (directory.exists())
  |                 {
  |                     // Get the list of the files contained in the package
  |                     files = directory.list();
  |                     Arrays.sort(files);
  |                 }
  |                 else
  |                 {
  |                     throw new ClassNotFoundException(strPackageName + " does not appear to be a valid package");
  |                 }
  |             }
  |         }
  |         catch (NullPointerException x)
  |         {
  |             throw new ClassNotFoundException(strPackageName + " (" + directory + ") does not appear to be a valid package");
  |         }
  |             for (int i = 0; i < files.length; i++)
  |             {
  |                 // we are only interested in .class files
  |                 if (files.endsWith(".class"))
  |                 {
  |                     // removes the .class extension
  |                     try 
  |                     {
  | 						classes.add(Class.forName(strPackageName + '.' + files.substring(0, files.length() - 6)));
  | 					} 
  |                     catch (Exception e) {}
  |                 }
  |             }
  |         
  |         Class[] classesA = new Class[classes.size()];
  |         classes.toArray(classesA);
  |         return classesA;
  |     }
  | 

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