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// Connection.java - Implementation of URLConnection for gcjlib
// protocol.
/* Copyright (C) 2003 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.java.net.protocol.gcjlib;
import java.io.InputStream;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import gnu.gcj.Core;
import gnu.gcj.runtime.SharedLibHelper;
import gnu.java.net.protocol.core.CoreInputStream;
/**
* @author Tom Tromey <tromey@redhat.com>
* @date January 10, 2003
*/
class Connection extends URLConnection
{
String solib;
String name;
Core core;
public Connection (URL url) throws MalformedURLException
{
super (url);
int index = url.getFile().indexOf ("!/");
if (index == -1)
throw new MalformedURLException ("couldn't find !/ in gcjlib URL");
name = url.getFile().substring (index + 2);
solib = url.getFile().substring (0, index);
}
public void connect() throws IOException
{
if (core != null)
return;
// We can't create a new SharedLibHelper here, since we don't know
// what parent class loader to use.
SharedLibHelper helper = SharedLibHelper.findHelper(solib);
if (helper == null)
throw new IOException("library not loaded: " + solib);
core = helper.findCore(name);
if (core == null)
throw new IOException("couldn't find core object: " + name);
}
public InputStream getInputStream() throws IOException
{
connect();
return new CoreInputStream(core);
}
public String getHeaderField(String field)
{
try
{
if (!connected)
connect();
if (field.equals("content-type"))
return guessContentTypeFromName(name);
else if (field.equals("content-length"))
return Long.toString(core.length);
}
catch (IOException e)
{
// Fall through.
}
return null;
}
}
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