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	/*
	* Copyright (c) 1998, 2015, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	package java.security;

	import java.security.*;
	import java.util.Enumeration;
	import java.util.Hashtable;
	import java.util.StringTokenizer;
	import sun.security.util.SecurityConstants;

	/**
	* The AllPermission is a permission that implies all other permissions.
	* <p>
	* <b>Note:</b> Granting AllPermission should be done with extreme care,
	* as it implies all other permissions. Thus, it grants code the ability
	* to run with security
	* disabled. Extreme caution should be taken before granting such
	* a permission to code. This permission should be used only during testing,
	* or in extremely rare cases where an application or applet is
	* completely trusted and adding the necessary permissions to the policy
	* is prohibitively cumbersome.
	*
	* @see java.security.Permission
	* @see java.security.AccessController
	* @see java.security.Permissions
	* @see java.security.PermissionCollection
	* @see java.lang.SecurityManager
	*
	*
	* @author Roland Schemers
	* @since 1.2
	*
	* @serial exclude
	*/

	public final class AllPermission extends Permission {

	private static final long serialVersionUID = -2916474571451318075L;

	/**
	* Creates a new AllPermission object.
	*/
	public AllPermission() {
	super("<all permissions>");
	}


	/**
	* Creates a new AllPermission object. This
	* constructor exists for use by the {@code Policy} object
	* to instantiate new Permission objects.
	*
	* @param name ignored
	* @param actions ignored.
	*/
	public AllPermission(String name, String actions) {
	this();
	}

	/**
	* Checks if the specified permission is "implied" by
	* this object. This method always returns true.
	*
	* @param p the permission to check against.
	*
	* @return return
	*/
	public boolean implies(Permission p) {
	return true;
	}

	/**
	* Checks two AllPermission objects for equality. Two AllPermission
	* objects are always equal.
	*
	* @param obj the object we are testing for equality with this object.
	* @return true if {@code obj} is an AllPermission, false otherwise.
	*/
	public boolean equals(Object obj) {
	return (obj instanceof AllPermission);
	}

	/**
	* Returns the hash code value for this object.
	*
	* @return a hash code value for this object.
	*/

	public int hashCode() {
	return 1;
	}

	/**
	* Returns the canonical string representation of the actions.
	*
	* @return the actions.
	*/
	public String getActions() {
	return "<all actions>";
	}

	/**
	* Returns a new PermissionCollection object for storing AllPermission
	* objects.
	*
	* @return a new PermissionCollection object suitable for
	* storing AllPermissions.
	*/
	public PermissionCollection newPermissionCollection() {
	return new AllPermissionCollection();
	}

	}

	/**
	* A AllPermissionCollection stores a collection
	* of AllPermission permissions. AllPermission objects
	* must be stored in a manner that allows them to be inserted in any
	* order, but enable the implies function to evaluate the implies
	* method in an efficient (and consistent) manner.
	*
	* @see java.security.Permission
	* @see java.security.Permissions
	*
	*
	* @author Roland Schemers
	*
	* @serial include
	*/

	final class AllPermissionCollection
	extends PermissionCollection
	implements java.io.Serializable
	{

	// use serialVersionUID from JDK 1.2.2 for interoperability
	private static final long serialVersionUID = -4023755556366636806L;

	private boolean all_allowed; // true if any all permissions have been added

	/**
	* Create an empty AllPermissions object.
	*
	*/

	public AllPermissionCollection() {
	all_allowed = false;
	}

	/**
	* Adds a permission to the AllPermissions. The key for the hash is
	* permission.path.
	*
	* @param permission the Permission object to add.
	*
	* @exception IllegalArgumentException - if the permission is not a
	* AllPermission
	*
	* @exception SecurityException - if this AllPermissionCollection object
	* has been marked readonly
	*/

	public void add(Permission permission) {
	if (! (permission instanceof AllPermission))
	throw new IllegalArgumentException("invalid permission: "+
	permission);
	if (isReadOnly())
	throw new SecurityException("attempt to add a Permission to a readonly PermissionCollection");

	all_allowed = true; // No sync; staleness OK
	}

	/**
	* Check and see if this set of permissions implies the permissions
	* expressed in "permission".
	*
	* @param permission the Permission object to compare
	*
	* @return always returns true.
	*/

	public boolean implies(Permission permission) {
	return all_allowed; // No sync; staleness OK
	}

	/**
	* Returns an enumeration of all the AllPermission objects in the
	* container.
	*
	* @return an enumeration of all the AllPermission objects.
	*/
	public Enumeration<Permission> elements() {
	return new Enumeration<>() {
	private boolean hasMore = all_allowed;

	public boolean hasMoreElements() {
	return hasMore;
	}

	public Permission nextElement() {
	hasMore = false;
	return SecurityConstants.ALL_PERMISSION;
	}
	};
	}
	}

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