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/*******************************************************************************
* Copyright (c) 2008 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.equinox.internal.p2.reconciler.dropins;
import java.io.*;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Iterator;
import java.util.Properties;
import org.eclipse.equinox.internal.p2.update.*;
import org.eclipse.equinox.internal.provisional.p2.core.ProvisionException;
/**
* @since 1.0
*/
public class LinksManager {
private static final String EXTENSION_LINK = ".link"; //$NON-NLS-1$
private static final String PATH_PROPERTY = "path"; //$NON-NLS-1$
private static final String PLATFORM_PROTOCOL = "platform:"; //$NON-NLS-1$
private static final String ECLIPSE_FOLDER = "eclipse"; //$NON-NLS-1$
private String defaultPolicy;
private Configuration configuration;
private boolean dirty = false;
/*
* If one site has a MANAGED_ONLY policy, then newly discovered sites must also have
* the same thing. Otherwise, they will have a policy of USER_EXCLUDE.
*/
private String getDefaultPolicy() {
if (defaultPolicy == null) {
for (Iterator iter = configuration.getSites().iterator(); defaultPolicy == null && iter.hasNext();) {
if (Site.POLICY_MANAGED_ONLY.equals(((Site) iter.next()).getPolicy()))
defaultPolicy = Site.POLICY_MANAGED_ONLY;
}
defaultPolicy = Site.POLICY_USER_EXCLUDE;
}
return defaultPolicy;
}
/*
* Synchronize the given configuration file with the files that are in the specified links folder.
* If any extension locations from the links folder are missing from the file, then update
* the configuration.
*/
public void synchronize(File configurationFile, File linksFolder) throws ProvisionException {
// read the existing configuration from disk
configuration = ConfigurationParser.parse(configurationFile);
if (configuration == null)
return;
// get the list of extension locations from the links folder
linksFolder.listFiles(new FileFilter() {
public boolean accept(File file) {
if (file.isFile() && file.getName().endsWith(EXTENSION_LINK))
configure(file);
return false;
}
});
// write out a new file if there were any changes.
if (dirty)
ConfigurationWriter.save(configuration, configurationFile);
dirty = false;
}
/*
* Roughly copied from PlatformConfiguration#configureExternalLinkSite in
* Update Configurator.
*/
void configure(File location) {
String path = readExtension(location);
boolean updateable = true;
// parse out link information
if (path.startsWith("r ")) { //$NON-NLS-1$
updateable = false;
path = path.substring(2).trim();
} else if (path.startsWith("rw ")) { //$NON-NLS-1$
path = path.substring(3).trim();
} else {
path = path.trim();
}
URL url;
// make sure we have a valid link specification
try {
File siteFile = new File(path);
siteFile = new File(siteFile, ECLIPSE_FOLDER);
url = siteFile.toURL();
if (findConfiguredSite(url) != null)
// linked site is already known
return;
} catch (MalformedURLException e) {
// ignore bad links ...
e.printStackTrace();
return;
}
Site site = new Site();
site.setLinkFile(location.getAbsolutePath());
site.setEnabled(true);
site.setPolicy(getDefaultPolicy());
site.setUpdateable(updateable);
site.setUrl(url.toExternalForm());
configuration.add(site);
dirty = true;
}
/*
* Look through the list of sites already known to this configuration
* and determine if there is one with the given URL.
*/
private Site findConfiguredSite(URL url) {
String urlString = url.toExternalForm();
Site result = internalFindConfiguredSite(urlString);
if (result != null)
return result;
// try again with fixed URLs since they can be tricky
try {
urlString = Utils.decode(urlString, "UTF-8"); //$NON-NLS-1$
} catch (UnsupportedEncodingException e) {
// ignore
}
urlString = Utils.canonicalizeURL(urlString);
return internalFindConfiguredSite(urlString);
}
private Site internalFindConfiguredSite(String url) {
for (Iterator iter = configuration.getSites().iterator(); iter.hasNext();) {
Site site = (Site) iter.next();
String urlString = site.getUrl();
urlString = Utils.canonicalizeURL(urlString);
if (urlString.startsWith(PLATFORM_PROTOCOL))
continue;
if (urlString.equals(url))
return site;
}
return null;
}
/*
* Read the contents of a link file and return the path. May or may not include
* a prefix indicating read-only or read-write status.
*/
private String readExtension(File file) {
Properties props = new Properties();
InputStream input = null;
try {
input = new BufferedInputStream(new FileInputStream(file));
props.load(input);
} catch (IOException e) {
// TODO
e.printStackTrace();
return null;
} finally {
if (input != null)
try {
input.close();
} catch (IOException e) {
// ignore
}
}
return props.getProperty(PATH_PROPERTY);
}
}
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