/*******************************************************************************
* 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;
}
}