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