| /******************************************************************************* |
| * Copyright (c) 2003, 2012 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.osgi.storage.url.reference; |
| |
| import java.io.IOException; |
| import java.net.*; |
| |
| /** |
| * URLStreamHandler for reference protocol. A reference URL is used to hold a |
| * reference to a local file URL. A reference URL allows bundles to be installed |
| * by reference. This means the content of the bundle will not be copied. Instead |
| * the content of the bundle will be loaded from the reference location specified |
| * by the reference URL. The Framework only supports reference URLs that refer |
| * to a local file URL. For example: <p> |
| * <pre> |
| * reference:file:/eclipse/plugins/org.eclipse.myplugin_1.0.0/ |
| * reference:file:/eclispe/plugins/org.eclipse.mybundle_1.0.0.jar |
| * </pre> |
| */ |
| public class Handler extends URLStreamHandler { |
| |
| private final String installPath; |
| |
| public Handler(String installURL) { |
| super(); |
| if (installURL != null && installURL.startsWith("file:")) { //$NON-NLS-1$ |
| // this is the safest way to create a File object off a file: URL |
| this.installPath = installURL.substring(5); |
| } else { |
| this.installPath = null; |
| } |
| } |
| |
| /** |
| * @throws IOException |
| */ |
| @Override |
| protected URLConnection openConnection(URL url) throws IOException { |
| return new ReferenceURLConnection(url, installPath); |
| } |
| |
| @Override |
| protected void parseURL(URL url, String str, int start, int end) { |
| if (end < start) { |
| return; |
| } |
| String reference = (start < end) ? str.substring(start, end) : url.getPath(); |
| |
| setURL(url, url.getProtocol(), null, -1, null, null, reference, null, null); |
| } |
| |
| } |