Subversion Repositories openrisc

/* Copyright (C) 2005  Free Software Foundation

   This file is part of libgcj.

This software is copyrighted work licensed under the terms of the

Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for

details.  */

package gnu.gcj.runtime;

import java.io.File;

import java.io.FilenameFilter;

import java.io.IOException;

import java.net.URL;

import java.net.URLClassLoader;

import java.util.StringTokenizer;

/**

 * This is a URLClassLoader that has an extra helper method for

 * handling things like java.ext.dirs.

 */

class HelperClassLoader extends URLClassLoader

{

  HelperClassLoader()

  {

    super(new URL[0]);

  }

  HelperClassLoader(ClassLoader parent)

  {

    super(new URL[0], parent);

  }

  /**

   * This is a helper method that adds all the jar and zip files from

   * a given list of paths to this class loader.  The paths are taken

   * from a system property whose name is provided as an argument.

   */

  final void addDirectoriesFromProperty(String propName)

  {

    StringTokenizer st

      = new StringTokenizer (System.getProperty (propName, ""),

                             File.pathSeparator);

    try

      {

        while (st.hasMoreElements ())

          {

            String dirname = st.nextToken ();

            File dir = new File (dirname);

            if (dir.exists ())

              {

                if (! dirname.endsWith (File.separator))

                  dirname = dirname + File.separator;

                String files[] = dir.list (new FilenameFilter ()

                  {

                    public boolean accept (File dir, String name)

                    {

                      return name.endsWith (".jar") || name.endsWith (".zip");

                    }

                  });

                for (int i = files.length - 1; i >= 0; i--)

                  addURL(new URL("file", "", -1, dirname + files[i]));

              }

          }

      }

    catch (java.net.MalformedURLException x)

      {

        // This should never happen.

        throw new RuntimeException(x);

      }

  }

}