| /******************************************************************************* |
| * Copyright (c) 2003, 2004 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.osgi.framework.internal.protocol.reference; |
| |
| import java.io.*; |
| import java.net.URL; |
| import java.net.URLConnection; |
| |
| import org.eclipse.osgi.framework.adaptor.core.ReferenceInputStream; |
| |
| /** |
| * URLConnection for BundleClassLoader resources. |
| */ |
| |
| public class ReferenceURLConnection extends URLConnection { |
| protected URL reference; |
| |
| /** |
| * Constructor for a BundleClassLoader resource URLConnection. |
| * |
| * @param url URL for this URLConnection. |
| * @param bundleEntry BundleEntry that the URLConnection is associated. |
| */ |
| protected ReferenceURLConnection(URL url) { |
| super(url); |
| } |
| |
| /** |
| * Establishes the connection to the resource specified by this <code>URL</code> |
| * with this <code>method</code>, along with other options that can only be set before |
| * this connection is made. |
| * |
| * @see connected |
| * @see java.io.IOException |
| * @see URLStreamHandler |
| */ |
| public synchronized void connect() throws IOException { |
| if (!connected) { |
| URL ref = new URL(url.getPath()); |
| if (!new File(ref.getFile()).exists()) |
| throw new FileNotFoundException(); |
| reference = ref; |
| } |
| } |
| |
| /** |
| * Answers whether this connection supports input. |
| * |
| * @return boolean true if this connection supports input, false otherwise |
| * |
| * @see setDoInput() |
| * @see doInput |
| */ |
| public boolean getDoInput() { |
| return true; |
| } |
| |
| /** |
| * Answers whether this connection supports output. |
| * |
| * @return boolean true if this connection supports output, false otherwise |
| * |
| * @see setDoOutput() |
| * @see doOutput |
| */ |
| public boolean getDoOutput() { |
| return false; |
| } |
| |
| /** |
| * Creates an InputStream for reading from this URL Connection. |
| * It throws UnknownServiceException by default. |
| * This method should be overridden by its subclasses |
| * |
| * @return InputStream The InputStream to read from |
| * @exception IOException If an InputStream could not be created |
| * |
| * @see getContent() |
| * @see getOutputStream() |
| * @see java.io.InputStream |
| * @see java.io.IOException |
| * |
| */ |
| public InputStream getInputStream() throws IOException { |
| if (!connected) { |
| connect(); |
| } |
| |
| return new ReferenceInputStream(reference); |
| } |
| |
| } |