org.eclipse.core.internal.registry.osgi.EquinoxUtils Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of aspectjtools Show documentation

AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based @AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step. This library is a superset of AspectJ weaver and hence also of AspectJ runtime.

There is a newer version: 1.9.22.1

Show newest version

/*******************************************************************************
 * Copyright (c) 2006, 2007 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.core.internal.registry.osgi;

import org.eclipse.osgi.service.environment.EnvironmentInfo;
import org.eclipse.osgi.service.resolver.PlatformAdmin;
import org.osgi.framework.*;

/**
 * The class contains a set of Equinox-specific helper methods. The methods were isolated
 * into separate class to prevent an attempt to load Equinox classes in a generic OSGi
 * environment.
 *
 * This class uses OSGi services.
 *
 * @since org.eclipse.equinox.registry 3.2.100
 */
public class EquinoxUtils {

	/**
	 * Get the command line arguments from the EnvironmentInfo service
	 */
	public static String[] getCommandLine(BundleContext context, ServiceReference ref) {
		if (ref == null)
			return null;
		try {
			EnvironmentInfo environmentInfo = (EnvironmentInfo) context.getService(ref);
			return environmentInfo == null ? null : environmentInfo.getNonFrameworkArgs();
		} finally {
			context.ungetService(ref);
		}
	}

	/**
	 * Get the time stamp from the PlatformAdmin service.
	 */
	public static long getContainerTimestamp(BundleContext context, ServiceReference ref) {
		if (ref == null)
			return -1;
		try {
			PlatformAdmin admin = (PlatformAdmin) context.getService(ref);
			return admin == null ? -1 : admin.getState(false).getTimeStamp();
		} finally {
			context.ungetService(ref);
		}
	}

	public static ServiceRegistration registerCommandProvider(BundleContext context) {
		// try to register the registry command provider
		try {
			// refer to the CommandProvider by name here so that even if VM
			// decides to pre-fetch all referred classes the expection will occur
			// inside the exception holder
			return context.registerService("org.eclipse.osgi.framework.console.CommandProvider", new RegistryCommandProvider(), null); //$NON-NLS-1$
		} catch (NoClassDefFoundError noClass) {
			// expected if CommandProvider is not available
		}
		return null;
	}

	/**
	 * Returns true if OSGi in not available
	 */
	public static boolean isActive(String bundleId) {
		// the try-catch block should take care
		try {
			org.osgi.framework.Bundle bundle = OSGIUtils.getDefault().getBundle(bundleId);
			if (bundle == null)
				return false; // should never happen
			return (bundle.getState() == Bundle.ACTIVE);
		} catch (NoClassDefFoundError noClass) {
			// expected if OSGi is not available; behave as if contributor is active
			return true;
		}
	}
}