| /******************************************************************************* |
| * Copyright (c) 2003, 2006 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-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.FilePath; |
| import org.eclipse.osgi.framework.internal.core.FrameworkProperties; |
| import org.eclipse.osgi.framework.internal.core.ReferenceInputStream; |
| |
| /** |
| * URLConnection for the reference protocol. |
| */ |
| |
| public class ReferenceURLConnection extends URLConnection { |
| protected URL reference; |
| |
| protected ReferenceURLConnection(URL url) { |
| super(url); |
| } |
| |
| public synchronized void connect() throws IOException { |
| if (!connected) { |
| // TODO assumes that reference URLs are always based on file: URLs. |
| // There are not solid usecases to the contrary. Yet. |
| // Construct the ref URL carefully so as to preserve UNC paths etc. |
| File file = new File(url.getPath().substring(5)); |
| URL ref; |
| if (!file.isAbsolute()) { |
| String installPath = getInstallPath(); |
| if (installPath != null) |
| file = makeAbsolute(installPath, file); |
| } |
| ref = file.toURL(); |
| if (!file.exists()) |
| throw new FileNotFoundException(file.toString()); |
| reference = ref; |
| } |
| } |
| |
| public boolean getDoInput() { |
| return true; |
| } |
| |
| public boolean getDoOutput() { |
| return false; |
| } |
| |
| public InputStream getInputStream() throws IOException { |
| if (!connected) { |
| connect(); |
| } |
| |
| return new ReferenceInputStream(reference); |
| } |
| |
| private String getInstallPath() { |
| String installURL = FrameworkProperties.getProperty("osgi.install.area"); //$NON-NLS-1$ |
| if (installURL == null) |
| return null; |
| if (!installURL.startsWith("file:")) //$NON-NLS-1$ |
| return null; |
| // this is the safest way to create a File object off a file: URL |
| return installURL.substring(5); |
| } |
| |
| private static File makeAbsolute(String base, File relative) { |
| if (relative.isAbsolute()) |
| return relative; |
| return new File(new FilePath(base + relative.getPath()).toString()); |
| } |
| } |