1 files changed, 77 insertions, 0 deletions
diff --git a/bundles/org.eclipse.osgi/container/src/org/eclipse/osgi/internal/permadmin/BundlePermissions.java b/bundles/org.eclipse.osgi/container/src/org/eclipse/osgi/internal/permadmin/BundlePermissions.java
new file mode 100644
index 000000000..5ade23ff0
--- /dev/null
+++ b/bundles/org.eclipse.osgi/container/src/org/eclipse/osgi/internal/permadmin/BundlePermissions.java
@@ -0,0 +1,77 @@
+/*******************************************************************************
+ * Copyright (c) 2008, 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.permadmin;
+
+import java.security.Permission;
+import java.security.PermissionCollection;
+import java.util.Enumeration;
+import java.util.NoSuchElementException;
+import org.osgi.framework.Bundle;
+
+public final class BundlePermissions extends PermissionCollection {
+	private static final long serialVersionUID = -5443618108312606612L;
+
+	// Note that this forces the Enumeration inner class to be loaded as soon as possible (see bug 119069)  
+	static final Enumeration<Permission> EMPTY_ENUMERATION = new Enumeration<Permission>() {
+		public boolean hasMoreElements() {
+			return false;
+		}
+
+		public Permission nextElement() {
+			throw new NoSuchElementException();
+		}
+	};
+
+	private final Bundle bundle;
+	private final SecurityAdmin securityAdmin;
+	private final PermissionInfoCollection impliedPermissions;
+	private final PermissionInfoCollection restrictedPermissions;
+
+	public BundlePermissions(Bundle bundle, SecurityAdmin securityAdmin, PermissionInfoCollection impliedPermissions, PermissionInfoCollection restrictedPermissions) {
+		this.bundle = bundle;
+		this.securityAdmin = securityAdmin;
+		this.impliedPermissions = impliedPermissions;
+		this.restrictedPermissions = restrictedPermissions;
+		setReadOnly(); // collections are managed with ConditionalPermissionAdmin
+	}
+
+	public void add(Permission permission) {
+		throw new SecurityException();
+	}
+
+	public Enumeration<Permission> elements() {
+		// TODO return an empty enumeration for now; 
+		// It does not seem possible to do this properly with multiple exports and conditional permissions.
+		// When looking to fix this be sure the Enumeration class is loaded as soon as possible (see bug 119069)
+		return EMPTY_ENUMERATION;
+	}
+
+	public boolean implies(Permission permission) {
+		// first check implied permissions
+		if ((impliedPermissions != null) && impliedPermissions.implies(permission))
+			return true;
+		// We must be allowed by the restricted permissions to have any hope of passing the check
+		if ((restrictedPermissions != null) && !restrictedPermissions.implies(permission))
+			return false;
+		return securityAdmin.checkPermission(permission, this);
+	}
+
+	public Bundle getBundle() {
+		return bundle;
+	}
+
+	void clearPermissionCache() {
+		if (impliedPermissions != null)
+			impliedPermissions.clearPermissionCache();
+		if (restrictedPermissions != null)
+			restrictedPermissions.clearPermissionCache();
+	}
+}