| /******************************************************************************* |
| * Copyright (c) 2011, 2013 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.equinox.internal.region; |
| |
| import org.eclipse.osgi.service.resolver.BundleDescription; |
| import org.osgi.framework.Bundle; |
| import org.osgi.framework.wiring.BundleRevision; |
| |
| /** |
| * Isolates all equinox specific code to a specific class to allow the equinox packages to be optional. |
| */ |
| public class EquinoxStateHelper { |
| static final Worker equinoxSupport; |
| |
| static { |
| Worker result = null; |
| try { |
| Class.forName("org.eclipse.osgi.service.resolver.BundleDescription"); //$NON-NLS-1$ |
| result = new Worker(); |
| } catch (ClassNotFoundException e) { |
| // nothing |
| } |
| equinoxSupport = result; |
| } |
| |
| static final class Worker { |
| final Long getBundleId(BundleRevision revision) { |
| if (revision instanceof BundleDescription) { |
| return ((BundleDescription) revision).getBundleId(); |
| } |
| return null; |
| } |
| } |
| |
| public static final long getBundleId(BundleRevision revision) { |
| // For testability, use the bundle revision's bundle before casting to BundleDescription. |
| Bundle bundle = revision.getBundle(); |
| if (bundle != null) { |
| return bundle.getBundleId(); |
| } |
| // Note that this bit of code is never useful at runtime since the framework never uses BundleDescriptions. |
| // It is only useful if the region hooks are used with the old Equinox State API |
| Long result = equinoxSupport == null ? null : equinoxSupport.getBundleId(revision); |
| if (result == null) |
| throw new RuntimeException(String.format("Cannot determine bundle id of BundleRevision '%s'", revision)); //$NON-NLS-1$ |
| return result; |
| } |
| |
| } |