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/* 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.Enumeration;
import java.util.HashSet;
import java.util.StringTokenizer;
/**
* This is a helper for the bootstrap class loader. It is a
* URLClassLoader so that we can read a class path and re-use all the
* existing code for finding classes, extracting them from jars, etc.
* However, it is never called the way that an ordinary ClassLoader is
* called. For instance, loadClass() is never used.
*/
public final class BootClassLoader extends URLClassLoader
{
BootClassLoader(String libdir)
{
super(new URL[0]);
// Add the contents of the endorsed directories.
StringTokenizer st
= new StringTokenizer (System.getProperty ("java.endorsed.dirs", ""),
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]));
}
}
String w3clib = (libdir + File.separator
+ System.mapLibraryName ("w3c-gcj"));
addURL(new URL("gcjlib", "", -1, w3clib));
String saxlib = (libdir + File.separator
+ System.mapLibraryName ("sax-gcj"));
addURL(new URL("gcjlib", "", -1, saxlib));
}
catch (java.net.MalformedURLException x)
{
// This should never happen.
throw new RuntimeException(x);
}
}
public Class bootLoadClass(String name)
throws ClassNotFoundException
{
Class c = findLoadedClass(name);
if (c == null)
{
try
{
// We could hack URLClassLoader to make this more
// efficient, if it mattered.
c = findClass(name);
}
catch (ClassNotFoundException _)
{
c = null;
}
}
return c;
}
public URL bootGetResource(String name)
{
return findResource(name);
}
public Enumeration bootGetResources(String name) throws IOException
{
return findResources(name);
}
}
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