| /******************************************************************************* |
| * Copyright (c) 2004, 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.core.internal.runtime; |
| |
| import java.io.*; |
| import java.net.URL; |
| import java.net.UnknownServiceException; |
| import org.eclipse.core.internal.boot.PlatformURLConnection; |
| import org.eclipse.core.internal.boot.PlatformURLHandler; |
| import org.eclipse.osgi.service.datalocation.Location; |
| import org.eclipse.osgi.util.NLS; |
| |
| public class PlatformURLConfigConnection extends PlatformURLConnection { |
| private static final String FILE_PROTOCOL = "file"; //$NON-NLS-1$ |
| private static boolean isRegistered = false; |
| public static final String CONFIG = "config"; //$NON-NLS-1$ |
| |
| private boolean parentConfiguration = false; |
| |
| /* |
| * Constructor for the class. |
| */ |
| public PlatformURLConfigConnection(URL url) { |
| super(url); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.equinox.internal.url.PlatformURLConnection#resolve() |
| */ |
| protected URL resolve() throws IOException { |
| String spec = url.getFile().trim(); |
| if (spec.startsWith("/")) //$NON-NLS-1$ |
| spec = spec.substring(1); |
| if (!spec.startsWith(CONFIG)) |
| throw new IOException(NLS.bind(CommonMessages.url_badVariant, url.toString())); |
| String path = spec.substring(CONFIG.length() + 1); |
| // resolution takes parent configuration into account (if it exists) |
| Activator activator = Activator.getDefault(); |
| if (activator == null) |
| throw new IOException(CommonMessages.activator_not_available); |
| Location localConfig = activator.getConfigurationLocation(); |
| Location parentConfig = localConfig.getParentLocation(); |
| // assume we will find the file locally |
| URL localURL = new URL(localConfig.getURL(), path); |
| if (!FILE_PROTOCOL.equals(localURL.getProtocol()) || parentConfig == null) |
| // we only support cascaded file: URLs |
| return localURL; |
| File localFile = new File(localURL.getPath()); |
| if (localFile.exists()) |
| // file exists in local configuration |
| return localURL; |
| // try to find in the parent configuration |
| URL parentURL = new URL(parentConfig.getURL(), path); |
| if (FILE_PROTOCOL.equals(parentURL.getProtocol())) { |
| // we only support cascaded file: URLs |
| File parentFile = new File(parentURL.getPath()); |
| if (parentFile.exists()) { |
| // parent has the location |
| parentConfiguration = true; |
| return parentURL; |
| } |
| } |
| return localURL; |
| } |
| |
| public static void startup() { |
| // register connection type for platform:/config handling |
| if (isRegistered) |
| return; |
| PlatformURLHandler.register(CONFIG, PlatformURLConfigConnection.class); |
| isRegistered = true; |
| } |
| |
| /* (non-Javadoc) |
| * @see java.net.URLConnection#getOutputStream() |
| */ |
| public OutputStream getOutputStream() throws IOException { |
| if (parentConfiguration || Activator.getDefault() == null || Activator.getDefault().getConfigurationLocation().isReadOnly()) |
| throw new UnknownServiceException(NLS.bind(CommonMessages.url_noOutput, url)); |
| //This is not optimal but connection is a private instance variable in the super-class. |
| URL resolved = getResolvedURL(); |
| if (resolved != null) { |
| String fileString = resolved.getFile(); |
| if (fileString != null) { |
| File file = new File(fileString); |
| String parent = file.getParent(); |
| if (parent != null) |
| new File(parent).mkdirs(); |
| return new FileOutputStream(file); |
| } |
| } |
| return null; |
| } |
| } |