3 files changed, 177 insertions, 0 deletions
diff --git a/libjava/gnu/gcj/protocol/jar/Connection.java b/libjava/gnu/gcj/protocol/jar/Connection.java
new file mode 100644
index 0000000..4d7421b
--- /dev/null
+++ b/libjava/gnu/gcj/protocol/jar/Connection.java
@@ -0,0 +1,86 @@
+/* Copyright (C) 1999  Cygnus Solutions
+
+   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.protocol.jar;
+
+import java.net.URL;
+import java.net.JarURLConnection;
+import java.net.URLStreamHandler;
+import java.net.MalformedURLException;
+import java.net.ProtocolException;
+import java.io.IOException;
+import java.util.jar.JarFile;
+import java.util.Hashtable;
+
+/**
+ * Written using on-line Java Platform 1.2 API Specification.
+ * Status: Needs a way to download jar files and store them in the local file
+ * system.  I don't know how to do that in a portable way.  For now, it can only handle 
+ * connections to a jar:file: url's.
+ *
+ * @author Kresten Krab Thorup <krab@gnu.org>
+ * @date Aug 10, 1999.
+ */
+
+
+
+public class Connection extends JarURLConnection 
+{
+  static Hashtable file_cache = new Hashtable();
+  private JarFile jarfile;
+
+  public Connection(URL url)
+    throws MalformedURLException
+  {
+    super(url);
+  }
+
+  public synchronized JarFile getJarFile() throws java.io.IOException
+  {
+    if (!connected)
+      connect();
+
+    if (! doInput)
+      throw new ProtocolException("Can't open JarFile if doInput is false");
+
+    if (jarfile != null)
+      return jarfile;
+
+    URL jarFileURL = getJarFileURL ();
+
+    if (jarFileURL.getProtocol ().equals ("file")
+	&& jarFileURL.getHost ().equals (""))
+      {
+	if (getUseCaches())
+	  {
+	    jarfile = (JarFile) file_cache.get(jarFileURL);
+	    if (jarFileURL == null)
+	      {
+		jarfile = new JarFile (jarFileURL.getFile ());
+		file_cache.put (jarFileURL, jarfile);
+	      }
+	  }
+	else
+	  jarfile = new JarFile (jarFileURL.getFile ());
+      }
+    else
+      {
+	/*
+	  FIXME: Here we need to download and cache the jar
+	  file in the local file system!  Stupid design.  Why
+	  can't we just create a JarFile from a bag of bytes?
+	*/
+
+	throw new java.io.IOException("cannot create jar file from " +
+				      jarFileURL);
+      }
+
+    return jarfile;
+  }
+
+}
diff --git a/libjava/gnu/gcj/protocol/jar/Handler.java b/libjava/gnu/gcj/protocol/jar/Handler.java
new file mode 100644
index 0000000..f9feb7d
--- /dev/null
+++ b/libjava/gnu/gcj/protocol/jar/Handler.java
@@ -0,0 +1,29 @@
+// Handler.java - URLStreamHandler for file protocol.
+
+/* Copyright (C) 1999  Cygnus Solutions
+
+   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.protocol.jar;
+
+import java.net.URL;
+import java.net.URLConnection;
+import java.net.URLStreamHandler;
+import java.io.IOException;
+
+/**
+ * @author Kresten Krab Thorup <krab@gnu.org>
+ * @date August 13, 1999.
+ */
+
+public class Handler extends URLStreamHandler
+{
+  protected URLConnection openConnection(URL url) throws IOException
+  {
+    return new Connection(url);
+  }
+}
diff --git a/libjava/gnu/gcj/runtime/VMClassLoader.java b/libjava/gnu/gcj/runtime/VMClassLoader.java
new file mode 100644
index 0000000..bfdb3627
--- /dev/null
+++ b/libjava/gnu/gcj/runtime/VMClassLoader.java
@@ -0,0 +1,62 @@
+/* Copyright (C) 1999  Cygnus Solutions
+
+   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.  */
+
+/* Author: Kresten Krab Thorup <krab@gnu.org>  */
+
+package gnu.gcj.runtime;
+
+import java.io.*;
+import java.util.StringTokenizer;
+import java.net.URL;
+
+final class VMClassLoader extends java.net.URLClassLoader
+{
+  private VMClassLoader ()
+  {	
+    super (init());
+  }
+
+  private static URL[] init() 
+  {
+    StringTokenizer st
+	= new StringTokenizer (System.getProperty ("java.class.path", "."),
+			       System.getProperty ("path.separator", ":"));
+
+    java.util.Vector p = new java.util.Vector();
+    while (st.hasMoreElements ()) 
+      {  
+	String e = st.nextToken ();
+	try
+	  {
+	    if (e.endsWith(".jar") || e.endsWith (".zip"))
+	      p.addElement(new URL("jar", "", -1, "file:///"+e+"!/"));
+	    else if (e.endsWith ("/"))
+	      p.addElement (new URL("file", "", -1, e));
+	    else if (new File (e).isDirectory ())
+	      p.addElement (new URL("file", "", -1, e + "/"));
+	    else
+	      /* Ignore path element. */;
+	  } 
+	catch (java.net.MalformedURLException x)
+	  {
+	    /* Ignore this path element */
+	  }
+      }
+
+    URL[] urls = new URL[p.size()];
+    p.copyInto (urls);
+    return urls;
+  }
+
+  /** This is overridden to search the internal hash table, which 
+   * will only search existing linked-in classes.   This will make
+   * the default implementation of loadClass (in ClassLoader) work right.
+   */
+  protected final native Class findSystemClass(String name) 
+    throws java.lang.ClassNotFoundException, java.lang.LinkageError;
+}