/*******************************************************************************
* Copyright (c) 2010, 2016 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.e4.ui.internal.css.swt;
import org.eclipse.e4.ui.internal.css.swt.definition.IColorAndFontProvider;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.service.log.LogService;
import org.osgi.service.packageadmin.PackageAdmin;
import org.osgi.util.tracker.ServiceTracker;
public class CSSActivator implements BundleActivator {
private static CSSActivator activator;
private BundleContext context;
private ServiceTracker<PackageAdmin, PackageAdmin> pkgAdminTracker;
private ServiceTracker<LogService, LogService> logTracker;
private ServiceTracker<IColorAndFontProvider, IColorAndFontProvider> colorAndFontProviderTracker;
public static CSSActivator getDefault() {
return activator;
}
public PackageAdmin getBundleAdmin() {
if (pkgAdminTracker == null) {
if (context == null) {
return null;
}
pkgAdminTracker = new ServiceTracker<PackageAdmin, PackageAdmin>(
context, PackageAdmin.class.getName(), null);
pkgAdminTracker.open();
}
return pkgAdminTracker.getService();
}
/**
* @param bundleName
* the bundle id
* @return A bundle if found, or <code>null</code>
*/
public Bundle getBundleForName(String bundleName) {
Bundle[] bundles = getBundleAdmin().getBundles(bundleName, null);
if (bundles == null) {
return null;
}
// Return the first bundle that is not installed or uninstalled
for (Bundle bundle : bundles) {
if ((bundle.getState() & (Bundle.INSTALLED | Bundle.UNINSTALLED)) == 0) {
return bundle;
}
}
return null;
}
@Override
public void start(BundleContext context) throws Exception {
activator = this;
this.context = context;
}
@Override
public void stop(BundleContext context) throws Exception {
if (pkgAdminTracker != null) {
pkgAdminTracker.close();
pkgAdminTracker = null;
}
if (logTracker != null) {
logTracker.close();
logTracker = null;
}
if (colorAndFontProviderTracker != null) {
colorAndFontProviderTracker.close();
colorAndFontProviderTracker = null;
}
this.context = null;
}
private LogService getLogger() {
if (logTracker == null) {
if (context == null) {
return null;
}
logTracker = new ServiceTracker<LogService, LogService>(context,
LogService.class.getName(), null);
logTracker.open();
}
return logTracker.getService();
}
public void log(int logError, String message) {
LogService logger = getLogger();
if (logger != null) {
logger.log(logError, message);
}
}
public void log(int logError, String message, Throwable e) {
LogService logger = getLogger();
if (logger != null) {
logger.log(logError, message, e);
}
}
public IColorAndFontProvider getColorAndFontProvider() {
if (colorAndFontProviderTracker == null) {
if (context == null) {
return null;
}
colorAndFontProviderTracker = new ServiceTracker<IColorAndFontProvider, IColorAndFontProvider>(
context,
IColorAndFontProvider.class.getName(), null);
colorAndFontProviderTracker.open();
}
return colorAndFontProviderTracker.getService();
}
}