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/*******************************************************************************
* Copyright (c) 2007 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.core;
import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Dictionary;
import java.util.Hashtable;
import org.eclipse.core.runtime.Path;
import org.eclipse.equinox.p2.core.location.AgentLocation;
import org.eclipse.osgi.framework.log.FrameworkLog;
import org.eclipse.osgi.service.datalocation.Location;
import org.osgi.framework.*;
import org.osgi.util.tracker.ServiceTracker;
public class Activator implements BundleActivator {
public static final String ID = "org.eclipse.equinox.p2.core"; //$NON-NLS-1$
public static Location agentDataLocation = null;
public static BundleContext context;
private static final String DEFAULT_AGENT_LOCATION = "p2"; //$NON-NLS-1$
public static Location downloadLocation = null;
private static Activator instance;
// Data mode constants for user, configuration and data locations.
private static final String NO_DEFAULT = "@noDefault"; //$NON-NLS-1$
private static final String NONE = "@none"; //$NON-NLS-1$
private static final String OSGI_INSTALL_AREA = "osgi.install.area"; //$NON-NLS-1$
private static final String PROP_AGENT_DATA_AREA = "eclipse.p2.data.area"; //$NON-NLS-1$
private static final String PROP_CONFIG_DIR = "osgi.configuration.area"; //$NON-NLS-1$
private static final String PROP_USER_DIR = "user.dir"; //$NON-NLS-1$
private static final String PROP_USER_HOME = "user.home"; //$NON-NLS-1$
public static final String READ_ONLY_AREA_SUFFIX = ".readOnly"; //$NON-NLS-1$
private static final String VAR_CONFIG_DIR = "@config.dir"; //$NON-NLS-1$
private static final String VAR_USER_DIR = "@user.dir"; //$NON-NLS-1$
private static final String VAR_USER_HOME = "@user.home"; //$NON-NLS-1$
private ServiceRegistration agentLocationRegistration = null;
ServiceTracker logTracker;
/**
* NOTE: This method is copied from LocationHelper in org.eclipse.osgi
* due to access restrictions.
*/
private static URL adjustTrailingSlash(URL url, boolean trailingSlash) throws MalformedURLException {
String file = url.getFile();
if (trailingSlash == (file.endsWith("/"))) //$NON-NLS-1$
return url;
file = trailingSlash ? file + "/" : file.substring(0, file.length() - 1); //$NON-NLS-1$
return new URL(url.getProtocol(), url.getHost(), file);
}
/**
* Builds a URL with the given specification
* NOTE: This method is copied from LocationHelper in org.eclipse.osgi
* due to access restrictions.
*
* @param spec the URL specification
* @param trailingSlash flag to indicate a trailing slash on the spec
* @return a URL
*/
private static URL buildURL(String spec, boolean trailingSlash) {
if (spec == null)
return null;
boolean isFile = spec.startsWith("file:"); //$NON-NLS-1$
try {
if (isFile)
return adjustTrailingSlash(new File(spec.substring(5)).toURL(), trailingSlash);
return new URL(spec);
} catch (MalformedURLException e) {
// if we failed and it is a file spec, there is nothing more we can do
// otherwise, try to make the spec into a file URL.
if (isFile)
return null;
try {
return adjustTrailingSlash(new File(spec).toURL(), trailingSlash);
} catch (MalformedURLException e1) {
return null;
}
}
}
/**
* Returns the framework log, or null if not available
*/
public static FrameworkLog getFrameworkLog() {
//protect against concurrent shutdown
Activator a = instance;
if (a == null)
return null;
ServiceTracker tracker = a.getLogTracker();
if (tracker == null)
return null;
return (FrameworkLog) tracker.getService();
}
private static String substituteVar(String source, String var, String prop) {
String value = Activator.context.getProperty(prop);
if (value == null)
value = ""; //$NON-NLS-1$
return value + source.substring(var.length());
}
private Location buildLocation(String property, URL defaultLocation, boolean readOnlyDefault, boolean addTrailingSlash) {
String location = Activator.context.getProperty(property);
// the user/product may specify a non-default readOnly setting
String userReadOnlySetting = Activator.context.getProperty(property + READ_ONLY_AREA_SUFFIX);
boolean readOnly = (userReadOnlySetting == null ? readOnlyDefault : Boolean.valueOf(userReadOnlySetting).booleanValue());
// if the instance location is not set, predict where the workspace will be and
// put the instance area inside the workspace meta area.
if (location == null)
return new BasicLocation(property, defaultLocation, readOnly);
// handle ../ entries in the middle of the location
location = new Path(location).toOSString();
String trimmedLocation = location.trim();
if (trimmedLocation.equalsIgnoreCase(NONE))
return null;
if (trimmedLocation.equalsIgnoreCase(NO_DEFAULT))
return new BasicLocation(property, null, readOnly);
if (trimmedLocation.startsWith(VAR_USER_HOME)) {
String base = substituteVar(location, VAR_USER_HOME, PROP_USER_HOME);
location = new File(base).getAbsolutePath();
} else if (trimmedLocation.startsWith(VAR_USER_DIR)) {
String base = substituteVar(location, VAR_USER_DIR, PROP_USER_DIR);
location = new File(base).getAbsolutePath();
} else if (trimmedLocation.startsWith(VAR_CONFIG_DIR)) {
//note the config dir system property is already a URL
location = substituteVar(location, VAR_CONFIG_DIR, PROP_CONFIG_DIR);
}
URL url = buildURL(location, addTrailingSlash);
BasicLocation result = null;
if (url != null) {
result = new BasicLocation(property, null, readOnly);
result.setURL(url, false);
}
return result;
}
private ServiceTracker getLogTracker() {
if (logTracker != null)
return logTracker;
//lazy init if the bundle has been started
if (context == null)
return null;
logTracker = new ServiceTracker(context, FrameworkLog.class.getName(), null);
logTracker.open();
return logTracker;
}
public void start(BundleContext aContext) throws Exception {
instance = this;
Activator.context = aContext;
URL defaultLocation = new URL(aContext.getProperty(OSGI_INSTALL_AREA) + DEFAULT_AGENT_LOCATION + '/');
agentDataLocation = buildLocation(PROP_AGENT_DATA_AREA, defaultLocation, false, true);
Dictionary locationProperties = new Hashtable();
if (defaultLocation != null) {
locationProperties.put("type", PROP_AGENT_DATA_AREA); //$NON-NLS-1$
agentLocationRegistration = aContext.registerService(new String[] {Location.class.getName(), AgentLocation.class.getName()}, agentDataLocation, locationProperties);
}
}
public void stop(BundleContext aContext) throws Exception {
instance = null;
if (agentLocationRegistration != null)
agentLocationRegistration.unregister();
if (logTracker != null) {
logTracker.close();
logTracker = null;
}
Activator.context = null;
}
}
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