1 files changed, 86 insertions, 0 deletions
diff --git a/libjava/gnu/gcj/protocol/jar/Connection.java b/libjava/gnu/gcj/protocol/jar/Connection.java
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+++ b/libjava/gnu/gcj/protocol/jar/Connection.java
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+/* 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;
+  }
+
+}