| /******************************************************************************* |
| * Copyright (c) 2004, 2010 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.osgi.internal.module; |
| |
| import java.security.Permission; |
| import org.eclipse.osgi.service.resolver.*; |
| import org.osgi.framework.*; |
| |
| public class PermissionChecker { |
| private BundleContext context; |
| private boolean checkPermissions = false; |
| private ResolverImpl resolver; |
| |
| public PermissionChecker(BundleContext context, boolean checkPermissions, ResolverImpl resolver) { |
| this.context = context; |
| this.checkPermissions = checkPermissions && context != null; // only can check permissions if context is not null |
| this.resolver = resolver; |
| } |
| |
| /* |
| * checks the permission for a bundle to import/reqiure a constraint |
| * and for a bundle to export/provide a package/BSN |
| */ |
| public boolean checkPermission(VersionConstraint vc, BaseDescription bd) { |
| if (!checkPermissions) |
| return true; |
| // TODO could optimize out the producer permission check on export package |
| boolean success = false; |
| Permission producerPermission = null, consumerPermission = null; |
| Bundle producer = null, consumer = null; |
| int errorType = 0; |
| if (vc instanceof ImportPackageSpecification) { |
| errorType = ResolverError.IMPORT_PACKAGE_PERMISSION; |
| producer = context.getBundle(((ExportPackageDescription) bd).getExporter().getBundleId()); |
| producerPermission = new PackagePermission(bd.getName(), PackagePermission.EXPORTONLY); |
| consumerPermission = producer != null ? new PackagePermission(vc.getName(), producer, PackagePermission.IMPORT) : new PackagePermission(vc.getName(), PackagePermission.IMPORT); |
| } else { |
| boolean requireBundle = vc instanceof BundleSpecification; |
| errorType = requireBundle ? ResolverError.REQUIRE_BUNDLE_PERMISSION : ResolverError.FRAGMENT_BUNDLE_PERMISSION; |
| producerPermission = new BundlePermission(bd.getName(), requireBundle ? BundlePermission.PROVIDE : BundlePermission.HOST); |
| consumerPermission = new BundlePermission(vc.getName(), requireBundle ? BundlePermission.REQUIRE : BundlePermission.FRAGMENT); |
| producer = context.getBundle(((BundleDescription) bd).getBundleId()); |
| } |
| consumer = context.getBundle(vc.getBundle().getBundleId()); |
| if (producer != null && (producer.getState() & Bundle.UNINSTALLED) == 0) { |
| success = producer.hasPermission(producerPermission); |
| if (!success) { |
| switch (errorType) { |
| case ResolverError.IMPORT_PACKAGE_PERMISSION : |
| errorType = ResolverError.EXPORT_PACKAGE_PERMISSION; |
| break; |
| case ResolverError.REQUIRE_BUNDLE_PERMISSION : |
| case ResolverError.FRAGMENT_BUNDLE_PERMISSION : |
| errorType = errorType == ResolverError.REQUIRE_BUNDLE_PERMISSION ? ResolverError.PROVIDE_BUNDLE_PERMISSION : ResolverError.HOST_BUNDLE_PERMISSION; |
| break; |
| } |
| resolver.getState().addResolverError(vc.getBundle(), errorType, producerPermission.toString(), vc); |
| } |
| } |
| if (success && consumer != null && (consumer.getState() & Bundle.UNINSTALLED) == 0) { |
| success = consumer.hasPermission(consumerPermission); |
| if (!success) |
| resolver.getState().addResolverError(vc.getBundle(), errorType, consumerPermission.toString(), vc); |
| } |
| |
| return success; |
| } |
| |
| boolean checkPackagePermission(ExportPackageDescription export) { |
| if (!checkPermissions) |
| return true; |
| Bundle bundle = context.getBundle(export.getExporter().getBundleId()); |
| return bundle == null ? false : bundle.hasPermission(new PackagePermission(export.getName(), PackagePermission.EXPORTONLY)); |
| } |
| } |