bundles/org.eclipse.osgi/osgi/src/org/osgi/framework/AdaptPermission.java - equinox/rt.equinox.framework - Git at Google

 /*
  * Copyright (c) OSGi Alliance (2010, 2021). All Rights Reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package org.osgi.framework;

 import java.io.IOException;
 import java.io.NotSerializableException;
 import java.io.ObjectInputStream;
 import java.io.ObjectOutputStream;
 import java.io.ObjectStreamField;
 import java.security.AccessController;
 import java.security.BasicPermission;
 import java.security.Permission;
 import java.security.PermissionCollection;
 import java.security.PrivilegedAction;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.Enumeration;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;

 /**
  * A bundle's authority to adapt an object to a type.
  *
  * <p>
  * {@code AdaptPermission} has one action: {@code adapt}.
  *
  * @ThreadSafe
  * @author $Id$
  */
 public final class AdaptPermission extends BasicPermission {

 	private static final long						serialVersionUID	= 1L;

 	/**
 	 * The action string {@code initiate}.
 	 */
 	public final static String						ADAPT				= "adapt";

 	private final static int						ACTION_ADAPT		= 0x00000001;
 	private final static int						ACTION_ALL			= ACTION_ADAPT;
 	final static int								ACTION_NONE			= 0;

 	/**
 	 * The actions mask.
 	 */
 	transient int									action_mask;

 	/**
 	 * The actions in canonical form.
 	 *
 	 * @serial
 	 */
 	private volatile String							actions				= null;

 	/**
 	 * The bundle used by this AdaptPermission.
 	 */
 	transient final Bundle							bundle;

 	/**
 	 * This holds a Filter matching object used to evaluate the filter in
 	 * implies.
 	 */
 	transient Filter								filter;

 	/**
 	 * This map holds the properties of the permission, used to match a filter
 	 * in implies. This is not initialized until necessary, and then cached in
 	 * this object.
 	 */
 	private transient volatile Map<String, Object>	properties;

 	/**
 	 * Creates a new granted {@code AdaptPermission} object.
 	 *
 	 * This constructor must only be used to create a permission that is going
 	 * to be checked.
 	 * <p>
 	 * Examples:
 	 *
 	 * <pre>
 	 * (adaptClass=com.acme.*)
 	 * (&amp;(signer=\*,o=ACME,c=US)(adaptClass=com.acme.*))
 	 * (signer=\*,o=ACME,c=US)
 	 * </pre>
 	 *
 	 * <p>
 	 * When a signer key is used within the filter expression the signer value
 	 * must escape the special filter chars ('*', '(', ')').
 	 * <p>
 	 * The name is specified as a filter expression. The filter gives access to
 	 * the following attributes:
 	 * <ul>
 	 * <li>signer - A Distinguished Name chain used to sign the exporting
 	 * bundle. Wildcards in a DN are not matched according to the filter string
 	 * rules, but according to the rules defined for a DN chain.</li>
 	 * <li>location - The location of the exporting bundle.</li>
 	 * <li>id - The bundle ID of the exporting bundle.</li>
 	 * <li>name - The symbolic name of the exporting bundle.</li>
 	 * <li>adaptClass - The name of the type to which an object can be adapted.</li>
 	 * </ul>
 	 * Filter attribute names are processed in a case sensitive manner.
 	 *
 	 * @param filter A filter expression. Filter attribute names are processed
 	 *        in a case sensitive manner. A special value of {@code "*"} can be
 	 *        used to match all adaptations.
 	 * @param actions {@code adapt}.
 	 * @throws IllegalArgumentException If the filter has an invalid syntax.
 	 */
 	public AdaptPermission(String filter, String actions) {
 		this(parseFilter(filter), parseActions(actions));
 	}

 	/**
 	 * Creates a new requested {@code AdaptPermission} object to be used by the
 	 * code that must perform {@code checkPermission}. {@code AdaptPermission}
 	 * objects created with this constructor cannot be added to an
 	 * {@code AdaptPermission} permission collection.
 	 *
 	 * @param adaptClass The name of the type to which an object can be adapted.
 	 * @param adaptableBundle The bundle associated with the object being
 	 *        adapted.
 	 * @param actions {@code adapt}.
 	 */
 	public AdaptPermission(String adaptClass, Bundle adaptableBundle, String actions) {
 		super(adaptClass);
 		setTransients(null, parseActions(actions));
 		this.bundle = adaptableBundle;
 		if (adaptClass == null) {
 			throw new NullPointerException("adaptClass must not be null");
 		}
 		if (adaptableBundle == null) {
 			throw new NullPointerException("adaptableBundle must not be null");
 		}
 	}

 	/**
 	 * Package private constructor used by AdaptPermissionCollection.
 	 *
 	 * @param filter name filter
 	 * @param mask action mask
 	 */
 	AdaptPermission(Filter filter, int mask) {
 		super((filter == null) ? "*" : filter.toString());
 		setTransients(filter, mask);
 		this.bundle = null;
 	}

 	/**
 	 * Called by constructors and when deserialized.
 	 *
 	 * @param filter Permission's filter or {@code null} for wildcard.
 	 * @param mask action mask
 	 */
 	private void setTransients(Filter filter, int mask) {
 		this.filter = filter;
 		if ((mask == ACTION_NONE) || ((mask & ACTION_ALL) != mask)) {
 			throw new IllegalArgumentException("invalid action string");
 		}
 		this.action_mask = mask;
 	}

 	/**
 	 * Parse action string into action mask.
 	 *
 	 * @param actions Action string.
 	 * @return action mask.
 	 */
 	private static int parseActions(String actions) {
 		boolean seencomma = false;

 		int mask = ACTION_NONE;

 		if (actions == null) {
 			return mask;
 		}

 		char[] a = actions.toCharArray();

 		int i = a.length - 1;
 		if (i < 0)
 			return mask;

 		while (i != -1) {
 			char c;

 			// skip whitespace
 			while ((i != -1) && ((c = a[i]) == ' ' || c == '\r' || c == '\n' || c == '\f' || c == '\t'))
 				i--;

 			// check for the known strings
 			int matchlen;

 			if (i >= 4 && (a[i - 4] == 'a' || a[i - 4] == 'A')
 					&& (a[i - 3] == 'd' || a[i - 3] == 'D')
 					&& (a[i - 2] == 'a' || a[i - 2] == 'A')
 					&& (a[i - 1] == 'p' || a[i - 1] == 'P')
 					&& (a[i] == 't' || a[i] == 'T')) {
 				matchlen = 5;
 				mask |= ACTION_ADAPT;

 			} else {
 				// parse error
 				throw new IllegalArgumentException("invalid actions: " + actions);
 			}

 			// make sure we didn't just match the tail of a word
 			// like "ackbarfadapt". Also, skip to the comma.
 			seencomma = false;
 			while (i >= matchlen && !seencomma) {
 				switch (a[i - matchlen]) {
 					case ',' :
 						seencomma = true;
 						/* FALLTHROUGH */
 					case ' ' :
 					case '\r' :
 					case '\n' :
 					case '\f' :
 					case '\t' :
 						break;
 					default :
 						throw new IllegalArgumentException("invalid permission: " + actions);
 				}
 				i--;
 			}

 			// point i at the location of the comma minus one (or -1).
 			i -= matchlen;
 		}

 		if (seencomma) {
 			throw new IllegalArgumentException("invalid actions: " + actions);
 		}

 		return mask;
 	}

 	/**
 	 * Parse filter string into a Filter object.
 	 *
 	 * @param filterString The filter string to parse.
 	 * @return a Filter for this bundle.
 	 * @throws IllegalArgumentException If the filter syntax is invalid.
 	 */
 	private static Filter parseFilter(String filterString) {
 		filterString = filterString.trim();
 		if (filterString.equals("*")) {
 			return null;
 		}
 		try {
 			return FrameworkUtil.createFilter(filterString);
 		} catch (InvalidSyntaxException e) {
 			throw new IllegalArgumentException("invalid filter", e);
 		}
 	}

 	/**
 	 * Determines if the specified permission is implied by this object.
 	 *
 	 * <p>
 	 * This method checks that the filter of the target is implied by the adapt
 	 * class name of this object. The list of {@code AdaptPermission} actions
 	 * must either match or allow for the list of the target object to imply the
 	 * target {@code AdaptPermission} action.
 	 * <p>
 	 *
 	 * @param p The requested permission.
 	 * @return {@code true} if the specified permission is implied by this
 	 *         object; {@code false} otherwise.
 	 */
 	@Override
 	public boolean implies(Permission p) {
 		if (!(p instanceof AdaptPermission)) {
 			return false;
 		}
 		AdaptPermission requested = (AdaptPermission) p;
 		if (bundle != null) {
 			return false;
 		}
 		// if requested permission has a filter, then it is an invalid argument
 		if (requested.filter != null) {
 			return false;
 		}
 		return implies0(requested, ACTION_NONE);
 	}

 	/**
 	 * Internal implies method. Used by the implies and the permission
 	 * collection implies methods.
 	 *
 	 * @param requested The requested AdaptPermission which has already be
 	 *        validated as a proper argument. The requested AdaptPermission must
 	 *        not have a filter expression.
 	 * @param effective The effective actions with which to start.
 	 * @return {@code true} if the specified permission is implied by this
 	 *         object; {@code false} otherwise.
 	 */
 	boolean implies0(AdaptPermission requested, int effective) {
 		/* check actions first - much faster */
 		effective |= action_mask;
 		final int desired = requested.action_mask;
 		if ((effective & desired) != desired) {
 			return false;
 		}
 		/* Get filter */
 		Filter f = filter;
 		if (f == null) {
 			// it's "*"
 			return true;
 		}
 		return f.matches(requested.getProperties());
 	}

 	/**
 	 * Returns the canonical string representation of the
 	 * {@code AdaptPermission} actions.
 	 *
 	 * <p>
 	 * Always returns present {@code AdaptPermission} actions in the following
 	 * order: {@code adapt}.
 	 *
 	 * @return Canonical string representation of the {@code AdaptPermission}
 	 *         actions.
 	 */
 	@Override
 	public String getActions() {
 		String result = actions;
 		if (result == null) {
 			actions = result = ADAPT;
 		}
 		return result;
 	}

 	/**
 	 * Returns a new {@code PermissionCollection} object suitable for storing
 	 * {@code AdaptPermission} objects.
 	 *
 	 * @return A new {@code PermissionCollection} object.
 	 */
 	@Override
 	public PermissionCollection newPermissionCollection() {
 		return new AdaptPermissionCollection();
 	}

 	/**
 	 * Determines the equality of two {@code AdaptPermission} objects.
 	 *
 	 * This method checks that specified permission has the same name and
 	 * {@code AdaptPermission} actions as this {@code AdaptPermission} object.
 	 *
 	 * @param obj The object to test for equality with this
 	 *        {@code AdaptPermission} object.
 	 * @return {@code true} if {@code obj} is a {@code AdaptPermission}, and has
 	 *         the same name and actions as this {@code AdaptPermission} object;
 	 *         {@code false} otherwise.
 	 */
 	@Override
 	public boolean equals(Object obj) {
 		if (obj == this) {
 			return true;
 		}

 		if (!(obj instanceof AdaptPermission)) {
 			return false;
 		}

 		AdaptPermission cp = (AdaptPermission) obj;

 		return (action_mask == cp.action_mask) && getName().equals(cp.getName()) && ((bundle == cp.bundle) || ((bundle != null) && bundle.equals(cp.bundle)));
 	}

 	/**
 	 * Returns the hash code value for this object.
 	 *
 	 * @return A hash code value for this object.
 	 */
 	@Override
 	public int hashCode() {
 		int h = 31 * 17 + getName().hashCode();
 		h = 31 * h + getActions().hashCode();
 		if (bundle != null) {
 			h = 31 * h + bundle.hashCode();
 		}
 		return h;
 	}

 	/**
 	 * WriteObject is called to save the state of this permission object to a
 	 * stream. The actions are serialized, and the superclass takes care of the
 	 * name.
 	 */
 	private synchronized void writeObject(java.io.ObjectOutputStream s) throws IOException {
 		if (bundle != null) {
 			throw new NotSerializableException("cannot serialize");
 		}
 		// Write out the actions. The superclass takes care of the name
 		// call getActions to make sure actions field is initialized
 		if (actions == null)
 			getActions();
 		s.defaultWriteObject();
 	}

 	/**
 	 * readObject is called to restore the state of this permission from a
 	 * stream.
 	 */
 	private synchronized void readObject(java.io.ObjectInputStream s) throws IOException, ClassNotFoundException {
 		// Read in the action, then initialize the rest
 		s.defaultReadObject();
 		setTransients(parseFilter(getName()), parseActions(actions));
 	}

 	/**
 	 * Called by {@link AdaptPermission#implies(Permission)}. This method is
 	 * only called on a requested permission which cannot have a filter set.
 	 *
 	 * @return a map of properties for this permission.
 	 */
 	private Map<String, Object> getProperties() {
 		Map<String, Object> result = properties;
 		if (result != null) {
 			return result;
 		}
 		final Map<String, Object> map = new HashMap<>(5);
 		map.put("adaptClass", getName());
 		if (bundle != null) {
 			AccessController.doPrivileged((PrivilegedAction<Void>) () -> {
 				map.put("id", Long.valueOf(bundle.getBundleId()));
 				map.put("location", bundle.getLocation());
 				String name = bundle.getSymbolicName();
 				if (name != null) {
 					map.put("name", name);
 				}
 				SignerProperty signer = new SignerProperty(bundle);
 				if (signer.isBundleSigned()) {
 					map.put("signer", signer);
 				}
 				return null;
 			});
 		}
 		return properties = map;
 	}
 }

 /**
  * Stores a set of {@code AdaptPermission} permissions.
  *
  * @see java.security.Permission
  * @see java.security.Permissions
  * @see java.security.PermissionCollection
  */

 final class AdaptPermissionCollection extends PermissionCollection {
 	static final long						serialVersionUID	= -3350758995234427603L;
 	/**
 	 * Collection of permissions.
 	 *
 	 * @serial
 	 * @GuardedBy this
 	 */
 	private Map<String, AdaptPermission>	permissions;

 	/**
 	 * Boolean saying if "*" is in the collection.
 	 *
 	 * @serial
 	 * @GuardedBy this
 	 */
 	private boolean							all_allowed;

 	/**
 	 * Create an empty AdaptPermissions object.
 	 */
 	public AdaptPermissionCollection() {
 		permissions = new HashMap<>();
 		all_allowed = false;
 	}

 	/**
 	 * Adds a permission to this permission collection.
 	 *
 	 * @param permission The {@code AdaptPermission} object to add.
 	 * @throws IllegalArgumentException If the specified permission is not a
 	 *         {@code AdaptPermission} instance or was constructed with a Bundle
 	 *         object.
 	 * @throws SecurityException If this {@code AdaptPermissionCollection}
 	 *         object has been marked read-only.
 	 */
 	@Override
 	public void add(final Permission permission) {
 		if (!(permission instanceof AdaptPermission)) {
 			throw new IllegalArgumentException("invalid permission: " + permission);
 		}
 		if (isReadOnly()) {
 			throw new SecurityException("attempt to add a Permission to a " + "readonly PermissionCollection");
 		}

 		final AdaptPermission ap = (AdaptPermission) permission;
 		if (ap.bundle != null) {
 			throw new IllegalArgumentException("cannot add to collection: " + ap);
 		}

 		final String name = ap.getName();
 		synchronized (this) {
 			Map<String, AdaptPermission> pc = permissions;
 			final AdaptPermission existing = pc.get(name);
 			if (existing != null) {
 				final int oldMask = existing.action_mask;
 				final int newMask = ap.action_mask;
 				if (oldMask != newMask) {
 					pc.put(name, new AdaptPermission(existing.filter, oldMask | newMask));

 				}
 			} else {
 				pc.put(name, ap);
 			}

 			if (!all_allowed) {
 				if (name.equals("*")) {
 					all_allowed = true;
 				}
 			}
 		}
 	}

 	/**
 	 * Determines if the specified permissions implies the permissions expressed
 	 * in {@code permission}.
 	 *
 	 * @param permission The Permission object to compare with this
 	 *        {@code AdaptPermission} object.
 	 * @return {@code true} if {@code permission} is a proper subset of a
 	 *         permission in the set; {@code false} otherwise.
 	 */
 	@Override
 	public boolean implies(final Permission permission) {
 		if (!(permission instanceof AdaptPermission)) {
 			return false;
 		}
 		final AdaptPermission requested = (AdaptPermission) permission;
 		/* if requested permission has a filter, then it is an invalid argument */
 		if (requested.filter != null) {
 			return false;
 		}

 		int effective = AdaptPermission.ACTION_NONE;

 		Collection<AdaptPermission> perms;
 		synchronized (this) {
 			Map<String, AdaptPermission> pc = permissions;
 			/* short circuit if the "*" Permission was added */
 			if (all_allowed) {
 				AdaptPermission ap = pc.get("*");
 				if (ap != null) {
 					effective |= ap.action_mask;
 					final int desired = requested.action_mask;
 					if ((effective & desired) == desired) {
 						return true;
 					}
 				}
 			}
 			perms = pc.values();
 		}
 		/* iterate one by one over filteredPermissions */
 		for (AdaptPermission perm : perms) {
 			if (perm.implies0(requested, effective)) {
 				return true;
 			}
 		}
 		return false;
 	}

 	/**
 	 * Returns an enumeration of all {@code AdaptPermission} objects in the
 	 * container.
 	 *
 	 * @return Enumeration of all {@code AdaptPermission} objects.
 	 */
 	@Override
 	public synchronized Enumeration<Permission> elements() {
 		List<Permission> all = new ArrayList<>(permissions.values());
 		return Collections.enumeration(all);
 	}

 	/* serialization logic */
 	private static final ObjectStreamField[]	serialPersistentFields	= {new ObjectStreamField("permissions", HashMap.class), new ObjectStreamField("all_allowed", Boolean.TYPE)};

 	private synchronized void writeObject(ObjectOutputStream out) throws IOException {
 		ObjectOutputStream.PutField pfields = out.putFields();
 		pfields.put("permissions", permissions);
 		pfields.put("all_allowed", all_allowed);
 		out.writeFields();
 	}

 	private synchronized void readObject(java.io.ObjectInputStream in) throws IOException, ClassNotFoundException {
 		ObjectInputStream.GetField gfields = in.readFields();
 		@SuppressWarnings("unchecked")
 		HashMap<String, AdaptPermission> p = (HashMap<String, AdaptPermission>) gfields.get("permissions", null);
 		permissions = p;
 		all_allowed = gfields.get("all_allowed", false);
 	}
 }
	/*
	* Copyright (c) OSGi Alliance (2010, 2021). All Rights Reserved.
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	package org.osgi.framework;

	import java.io.IOException;
	import java.io.NotSerializableException;
	import java.io.ObjectInputStream;
	import java.io.ObjectOutputStream;
	import java.io.ObjectStreamField;
	import java.security.AccessController;
	import java.security.BasicPermission;
	import java.security.Permission;
	import java.security.PermissionCollection;
	import java.security.PrivilegedAction;
	import java.util.ArrayList;
	import java.util.Collection;
	import java.util.Collections;
	import java.util.Enumeration;
	import java.util.HashMap;
	import java.util.List;
	import java.util.Map;

	/**
	* A bundle's authority to adapt an object to a type.
	*
	* <p>
	* {@code AdaptPermission} has one action: {@code adapt}.
	*
	* @ThreadSafe
	* @author $Id$
	*/
	public final class AdaptPermission extends BasicPermission {

	private static final long serialVersionUID = 1L;

	/**
	* The action string {@code initiate}.
	*/
	public final static String ADAPT = "adapt";

	private final static int ACTION_ADAPT = 0x00000001;
	private final static int ACTION_ALL = ACTION_ADAPT;
	final static int ACTION_NONE = 0;

	/**
	* The actions mask.
	*/
	transient int action_mask;

	/**
	* The actions in canonical form.
	*
	* @serial
	*/
	private volatile String actions = null;

	/**
	* The bundle used by this AdaptPermission.
	*/
	transient final Bundle bundle;

	/**
	* This holds a Filter matching object used to evaluate the filter in
	* implies.
	*/
	transient Filter filter;

	/**
	* This map holds the properties of the permission, used to match a filter
	* in implies. This is not initialized until necessary, and then cached in
	* this object.
	*/
	private transient volatile Map<String, Object> properties;

	/**
	* Creates a new granted {@code AdaptPermission} object.
	*
	* This constructor must only be used to create a permission that is going
	* to be checked.
	* <p>
	* Examples:
	*
	* <pre>
	* (adaptClass=com.acme.*)
	* (&(signer=\,o=ACME,c=US)(adaptClass=com.acme.))
	* (signer=\*,o=ACME,c=US)
	* </pre>
	*
	* <p>
	* When a signer key is used within the filter expression the signer value
	* must escape the special filter chars ('*', '(', ')').
	* <p>
	* The name is specified as a filter expression. The filter gives access to
	* the following attributes:
	* <ul>
	* <li>signer - A Distinguished Name chain used to sign the exporting
	* bundle. Wildcards in a DN are not matched according to the filter string
	* rules, but according to the rules defined for a DN chain.</li>
	* <li>location - The location of the exporting bundle.</li>
	* <li>id - The bundle ID of the exporting bundle.</li>
	* <li>name - The symbolic name of the exporting bundle.</li>
	* <li>adaptClass - The name of the type to which an object can be adapted.</li>
	* </ul>
	* Filter attribute names are processed in a case sensitive manner.
	*
	* @param filter A filter expression. Filter attribute names are processed
	* in a case sensitive manner. A special value of {@code "*"} can be
	* used to match all adaptations.
	* @param actions {@code adapt}.
	* @throws IllegalArgumentException If the filter has an invalid syntax.
	*/
	public AdaptPermission(String filter, String actions) {
	this(parseFilter(filter), parseActions(actions));
	}

	/**
	* Creates a new requested {@code AdaptPermission} object to be used by the
	* code that must perform {@code checkPermission}. {@code AdaptPermission}
	* objects created with this constructor cannot be added to an
	* {@code AdaptPermission} permission collection.
	*
	* @param adaptClass The name of the type to which an object can be adapted.
	* @param adaptableBundle The bundle associated with the object being
	* adapted.
	* @param actions {@code adapt}.
	*/
	public AdaptPermission(String adaptClass, Bundle adaptableBundle, String actions) {
	super(adaptClass);
	setTransients(null, parseActions(actions));
	this.bundle = adaptableBundle;
	if (adaptClass == null) {
	throw new NullPointerException("adaptClass must not be null");
	}
	if (adaptableBundle == null) {
	throw new NullPointerException("adaptableBundle must not be null");
	}
	}

	/**
	* Package private constructor used by AdaptPermissionCollection.
	*
	* @param filter name filter
	* @param mask action mask
	*/
	AdaptPermission(Filter filter, int mask) {
	super((filter == null) ? "*" : filter.toString());
	setTransients(filter, mask);
	this.bundle = null;
	}

	/**
	* Called by constructors and when deserialized.
	*
	* @param filter Permission's filter or {@code null} for wildcard.
	* @param mask action mask
	*/
	private void setTransients(Filter filter, int mask) {
	this.filter = filter;
	if ((mask == ACTION_NONE) \|\| ((mask & ACTION_ALL) != mask)) {
	throw new IllegalArgumentException("invalid action string");
	}
	this.action_mask = mask;
	}

	/**
	* Parse action string into action mask.
	*
	* @param actions Action string.
	* @return action mask.
	*/
	private static int parseActions(String actions) {
	boolean seencomma = false;

	int mask = ACTION_NONE;

	if (actions == null) {
	return mask;
	}

	char[] a = actions.toCharArray();

	int i = a.length - 1;
	if (i < 0)
	return mask;

	while (i != -1) {
	char c;

	// skip whitespace
	while ((i != -1) && ((c = a[i]) == ' ' \|\| c == '\r' \|\| c == '\n' \|\| c == '\f' \|\| c == '\t'))
	i--;

	// check for the known strings
	int matchlen;

	if (i >= 4 && (a[i - 4] == 'a' \|\| a[i - 4] == 'A')
	&& (a[i - 3] == 'd' \|\| a[i - 3] == 'D')
	&& (a[i - 2] == 'a' \|\| a[i - 2] == 'A')
	&& (a[i - 1] == 'p' \|\| a[i - 1] == 'P')
	&& (a[i] == 't' \|\| a[i] == 'T')) {
	matchlen = 5;
	mask \|= ACTION_ADAPT;

	} else {
	// parse error
	throw new IllegalArgumentException("invalid actions: " + actions);
	}

	// make sure we didn't just match the tail of a word
	// like "ackbarfadapt". Also, skip to the comma.
	seencomma = false;
	while (i >= matchlen && !seencomma) {
	switch (a[i - matchlen]) {
	case ',' :
	seencomma = true;
	/* FALLTHROUGH */
	case ' ' :
	case '\r' :
	case '\n' :
	case '\f' :
	case '\t' :
	break;
	default :
	throw new IllegalArgumentException("invalid permission: " + actions);
	}
	i--;
	}

	// point i at the location of the comma minus one (or -1).
	i -= matchlen;
	}

	if (seencomma) {
	throw new IllegalArgumentException("invalid actions: " + actions);
	}

	return mask;
	}

	/**
	* Parse filter string into a Filter object.
	*
	* @param filterString The filter string to parse.
	* @return a Filter for this bundle.
	* @throws IllegalArgumentException If the filter syntax is invalid.
	*/
	private static Filter parseFilter(String filterString) {
	filterString = filterString.trim();
	if (filterString.equals("*")) {
	return null;
	}
	try {
	return FrameworkUtil.createFilter(filterString);
	} catch (InvalidSyntaxException e) {
	throw new IllegalArgumentException("invalid filter", e);
	}
	}

	/**
	* Determines if the specified permission is implied by this object.
	*
	* <p>
	* This method checks that the filter of the target is implied by the adapt
	* class name of this object. The list of {@code AdaptPermission} actions
	* must either match or allow for the list of the target object to imply the
	* target {@code AdaptPermission} action.
	* <p>
	*
	* @param p The requested permission.
	* @return {@code true} if the specified permission is implied by this
	* object; {@code false} otherwise.
	*/
	@Override
	public boolean implies(Permission p) {
	if (!(p instanceof AdaptPermission)) {
	return false;
	}
	AdaptPermission requested = (AdaptPermission) p;
	if (bundle != null) {
	return false;
	}
	// if requested permission has a filter, then it is an invalid argument
	if (requested.filter != null) {
	return false;
	}
	return implies0(requested, ACTION_NONE);
	}

	/**
	* Internal implies method. Used by the implies and the permission
	* collection implies methods.
	*
	* @param requested The requested AdaptPermission which has already be
	* validated as a proper argument. The requested AdaptPermission must
	* not have a filter expression.
	* @param effective The effective actions with which to start.
	* @return {@code true} if the specified permission is implied by this
	* object; {@code false} otherwise.
	*/
	boolean implies0(AdaptPermission requested, int effective) {
	/* check actions first - much faster */
	effective \|= action_mask;
	final int desired = requested.action_mask;
	if ((effective & desired) != desired) {
	return false;
	}
	/* Get filter */
	Filter f = filter;
	if (f == null) {
	// it's "*"
	return true;
	}
	return f.matches(requested.getProperties());
	}

	/**
	* Returns the canonical string representation of the
	* {@code AdaptPermission} actions.
	*
	* <p>
	* Always returns present {@code AdaptPermission} actions in the following
	* order: {@code adapt}.
	*
	* @return Canonical string representation of the {@code AdaptPermission}
	* actions.
	*/
	@Override
	public String getActions() {
	String result = actions;
	if (result == null) {
	actions = result = ADAPT;
	}
	return result;
	}

	/**
	* Returns a new {@code PermissionCollection} object suitable for storing
	* {@code AdaptPermission} objects.
	*
	* @return A new {@code PermissionCollection} object.
	*/
	@Override
	public PermissionCollection newPermissionCollection() {
	return new AdaptPermissionCollection();
	}

	/**
	* Determines the equality of two {@code AdaptPermission} objects.
	*
	* This method checks that specified permission has the same name and
	* {@code AdaptPermission} actions as this {@code AdaptPermission} object.
	*
	* @param obj The object to test for equality with this
	* {@code AdaptPermission} object.
	* @return {@code true} if {@code obj} is a {@code AdaptPermission}, and has
	* the same name and actions as this {@code AdaptPermission} object;
	* {@code false} otherwise.
	*/
	@Override
	public boolean equals(Object obj) {
	if (obj == this) {
	return true;
	}

	if (!(obj instanceof AdaptPermission)) {
	return false;
	}

	AdaptPermission cp = (AdaptPermission) obj;

	return (action_mask == cp.action_mask) && getName().equals(cp.getName()) && ((bundle == cp.bundle) \|\| ((bundle != null) && bundle.equals(cp.bundle)));
	}

	/**
	* Returns the hash code value for this object.
	*
	* @return A hash code value for this object.
	*/
	@Override
	public int hashCode() {
	int h = 31 * 17 + getName().hashCode();
	h = 31 * h + getActions().hashCode();
	if (bundle != null) {
	h = 31 * h + bundle.hashCode();
	}
	return h;
	}

	/**
	* WriteObject is called to save the state of this permission object to a
	* stream. The actions are serialized, and the superclass takes care of the
	* name.
	*/
	private synchronized void writeObject(java.io.ObjectOutputStream s) throws IOException {
	if (bundle != null) {
	throw new NotSerializableException("cannot serialize");
	}
	// Write out the actions. The superclass takes care of the name
	// call getActions to make sure actions field is initialized
	if (actions == null)
	getActions();
	s.defaultWriteObject();
	}

	/**
	* readObject is called to restore the state of this permission from a
	* stream.
	*/
	private synchronized void readObject(java.io.ObjectInputStream s) throws IOException, ClassNotFoundException {
	// Read in the action, then initialize the rest
	s.defaultReadObject();
	setTransients(parseFilter(getName()), parseActions(actions));
	}

	/**
	* Called by {@link AdaptPermission#implies(Permission)}. This method is
	* only called on a requested permission which cannot have a filter set.
	*
	* @return a map of properties for this permission.
	*/
	private Map<String, Object> getProperties() {
	Map<String, Object> result = properties;
	if (result != null) {
	return result;
	}
	final Map<String, Object> map = new HashMap<>(5);
	map.put("adaptClass", getName());
	if (bundle != null) {
	AccessController.doPrivileged((PrivilegedAction<Void>) () -> {
	map.put("id", Long.valueOf(bundle.getBundleId()));
	map.put("location", bundle.getLocation());
	String name = bundle.getSymbolicName();
	if (name != null) {
	map.put("name", name);
	}
	SignerProperty signer = new SignerProperty(bundle);
	if (signer.isBundleSigned()) {
	map.put("signer", signer);
	}
	return null;
	});
	}
	return properties = map;
	}
	}

	/**
	* Stores a set of {@code AdaptPermission} permissions.
	*
	* @see java.security.Permission
	* @see java.security.Permissions
	* @see java.security.PermissionCollection
	*/

	final class AdaptPermissionCollection extends PermissionCollection {
	static final long serialVersionUID = -3350758995234427603L;
	/**
	* Collection of permissions.
	*
	* @serial
	* @GuardedBy this
	*/
	private Map<String, AdaptPermission> permissions;

	/**
	* Boolean saying if "*" is in the collection.
	*
	* @serial
	* @GuardedBy this
	*/
	private boolean all_allowed;

	/**
	* Create an empty AdaptPermissions object.
	*/
	public AdaptPermissionCollection() {
	permissions = new HashMap<>();
	all_allowed = false;
	}

	/**
	* Adds a permission to this permission collection.
	*
	* @param permission The {@code AdaptPermission} object to add.
	* @throws IllegalArgumentException If the specified permission is not a
	* {@code AdaptPermission} instance or was constructed with a Bundle
	* object.
	* @throws SecurityException If this {@code AdaptPermissionCollection}
	* object has been marked read-only.
	*/
	@Override
	public void add(final Permission permission) {
	if (!(permission instanceof AdaptPermission)) {
	throw new IllegalArgumentException("invalid permission: " + permission);
	}
	if (isReadOnly()) {
	throw new SecurityException("attempt to add a Permission to a " + "readonly PermissionCollection");
	}

	final AdaptPermission ap = (AdaptPermission) permission;
	if (ap.bundle != null) {
	throw new IllegalArgumentException("cannot add to collection: " + ap);
	}

	final String name = ap.getName();
	synchronized (this) {
	Map<String, AdaptPermission> pc = permissions;
	final AdaptPermission existing = pc.get(name);
	if (existing != null) {
	final int oldMask = existing.action_mask;
	final int newMask = ap.action_mask;
	if (oldMask != newMask) {
	pc.put(name, new AdaptPermission(existing.filter, oldMask \| newMask));

	}
	} else {
	pc.put(name, ap);
	}

	if (!all_allowed) {
	if (name.equals("*")) {
	all_allowed = true;
	}
	}
	}
	}

	/**
	* Determines if the specified permissions implies the permissions expressed
	* in {@code permission}.
	*
	* @param permission The Permission object to compare with this
	* {@code AdaptPermission} object.
	* @return {@code true} if {@code permission} is a proper subset of a
	* permission in the set; {@code false} otherwise.
	*/
	@Override
	public boolean implies(final Permission permission) {
	if (!(permission instanceof AdaptPermission)) {
	return false;
	}
	final AdaptPermission requested = (AdaptPermission) permission;
	/* if requested permission has a filter, then it is an invalid argument */
	if (requested.filter != null) {
	return false;
	}

	int effective = AdaptPermission.ACTION_NONE;

	Collection<AdaptPermission> perms;
	synchronized (this) {
	Map<String, AdaptPermission> pc = permissions;
	/* short circuit if the "" Permission was added /
	if (all_allowed) {
	AdaptPermission ap = pc.get("*");
	if (ap != null) {
	effective \|= ap.action_mask;
	final int desired = requested.action_mask;
	if ((effective & desired) == desired) {
	return true;
	}
	}
	}
	perms = pc.values();
	}
	/* iterate one by one over filteredPermissions */
	for (AdaptPermission perm : perms) {
	if (perm.implies0(requested, effective)) {
	return true;
	}
	}
	return false;
	}

	/**
	* Returns an enumeration of all {@code AdaptPermission} objects in the
	* container.
	*
	* @return Enumeration of all {@code AdaptPermission} objects.
	*/
	@Override
	public synchronized Enumeration<Permission> elements() {
	List<Permission> all = new ArrayList<>(permissions.values());
	return Collections.enumeration(all);
	}

	/* serialization logic */
	private static final ObjectStreamField[] serialPersistentFields = {new ObjectStreamField("permissions", HashMap.class), new ObjectStreamField("all_allowed", Boolean.TYPE)};

	private synchronized void writeObject(ObjectOutputStream out) throws IOException {
	ObjectOutputStream.PutField pfields = out.putFields();
	pfields.put("permissions", permissions);
	pfields.put("all_allowed", all_allowed);
	out.writeFields();
	}

	private synchronized void readObject(java.io.ObjectInputStream in) throws IOException, ClassNotFoundException {
	ObjectInputStream.GetField gfields = in.readFields();
	@SuppressWarnings("unchecked")
	HashMap<String, AdaptPermission> p = (HashMap<String, AdaptPermission>) gfields.get("permissions", null);
	permissions = p;
	all_allowed = gfields.get("all_allowed", false);
	}
	}