87 lines
2.0 KiB
Java
87 lines
2.0 KiB
Java
/* Copyright (C) 1999 Free Software Foundation
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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package gnu.gcj.protocol.jar;
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import java.net.URL;
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import java.net.JarURLConnection;
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import java.net.URLStreamHandler;
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import java.net.MalformedURLException;
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import java.net.ProtocolException;
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import java.io.IOException;
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import java.util.jar.JarFile;
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import java.util.Hashtable;
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/**
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* Written using on-line Java Platform 1.2 API Specification.
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* Status: Needs a way to download jar files and store them in the local file
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* system. I don't know how to do that in a portable way. For now, it can only handle
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* connections to a jar:file: url's.
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*
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* @author Kresten Krab Thorup <krab@gnu.org>
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* @date Aug 10, 1999.
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*/
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public class Connection extends JarURLConnection
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{
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static Hashtable file_cache = new Hashtable();
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private JarFile jarfile;
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public Connection(URL url)
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throws MalformedURLException
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{
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super(url);
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}
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public synchronized JarFile getJarFile() throws java.io.IOException
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{
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if (!connected)
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connect();
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if (! doInput)
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throw new ProtocolException("Can't open JarFile if doInput is false");
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if (jarfile != null)
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return jarfile;
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URL jarFileURL = getJarFileURL ();
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if (jarFileURL.getProtocol ().equals ("file")
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&& jarFileURL.getHost ().equals (""))
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{
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if (getUseCaches())
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{
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jarfile = (JarFile) file_cache.get(jarFileURL);
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if (jarfile == null)
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{
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jarfile = new JarFile (jarFileURL.getFile ());
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file_cache.put (jarFileURL, jarfile);
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}
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}
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else
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jarfile = new JarFile (jarFileURL.getFile ());
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}
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else
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{
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/*
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FIXME: Here we need to download and cache the jar
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file in the local file system! Stupid design. Why
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can't we just create a JarFile from a bag of bytes?
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*/
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throw new java.io.IOException("cannot create jar file from " +
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jarFileURL);
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}
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return jarfile;
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}
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}
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