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/*******************************************************************************
* Copyright (c) 2006, 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.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;
}
}
}
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