author | jjg |
Mon, 15 Aug 2011 11:48:20 -0700 | |
changeset 10336 | 0bb1999251f8 |
parent 9035 | 1255eb81cc2f |
child 14014 | da3648e13e67 |
permissions | -rw-r--r-- |
2 | 1 |
/* |
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* Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package java.security; |
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import java.util.Enumeration; |
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import java.util.Map; |
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import java.util.HashMap; |
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import java.util.Hashtable; |
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import java.util.Collections; |
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import java.io.ObjectStreamField; |
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import java.io.ObjectOutputStream; |
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import java.io.ObjectInputStream; |
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import java.io.IOException; |
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/** |
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* The BasicPermission class extends the Permission class, and |
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* can be used as the base class for permissions that want to |
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* follow the same naming convention as BasicPermission. |
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* <P> |
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* The name for a BasicPermission is the name of the given permission |
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* (for example, "exit", |
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* "setFactory", "print.queueJob", etc). The naming |
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* convention follows the hierarchical property naming convention. |
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* An asterisk may appear by itself, or if immediately preceded by a "." |
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* may appear at the end of the name, to signify a wildcard match. |
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* For example, "*" and "java.*" are valid, while "*java", "a*b", |
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* and "java*" are not valid. |
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* <P> |
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* The action string (inherited from Permission) is unused. |
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* Thus, BasicPermission is commonly used as the base class for |
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* "named" permissions |
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* (ones that contain a name but no actions list; you either have the |
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* named permission or you don't.) |
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* Subclasses may implement actions on top of BasicPermission, |
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* if desired. |
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* <p> |
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* <P> |
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* @see java.security.Permission |
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* @see java.security.Permissions |
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* @see java.security.PermissionCollection |
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* @see java.lang.SecurityManager |
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* |
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* @author Marianne Mueller |
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* @author Roland Schemers |
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*/ |
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public abstract class BasicPermission extends Permission |
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implements java.io.Serializable |
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{ |
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private static final long serialVersionUID = 6279438298436773498L; |
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// does this permission have a wildcard at the end? |
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private transient boolean wildcard; |
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// the name without the wildcard on the end |
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private transient String path; |
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// is this permission the old-style exitVM permission (pre JDK 1.6)? |
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private transient boolean exitVM; |
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/** |
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* initialize a BasicPermission object. Common to all constructors. |
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* |
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*/ |
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private void init(String name) |
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{ |
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if (name == null) |
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throw new NullPointerException("name can't be null"); |
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int len = name.length(); |
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if (len == 0) { |
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throw new IllegalArgumentException("name can't be empty"); |
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} |
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char last = name.charAt(len - 1); |
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// Is wildcard or ends with ".*"? |
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if (last == '*' && (len == 1 || name.charAt(len - 2) == '.')) { |
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wildcard = true; |
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if (len == 1) { |
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path = ""; |
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} else { |
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path = name.substring(0, len - 1); |
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} |
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} else { |
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if (name.equals("exitVM")) { |
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wildcard = true; |
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path = "exitVM."; |
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exitVM = true; |
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} else { |
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path = name; |
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} |
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} |
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} |
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/** |
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* Creates a new BasicPermission with the specified name. |
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* Name is the symbolic name of the permission, such as |
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* "setFactory", |
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* "print.queueJob", or "topLevelWindow", etc. |
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* |
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* @param name the name of the BasicPermission. |
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* |
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* @throws NullPointerException if <code>name</code> is <code>null</code>. |
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* @throws IllegalArgumentException if <code>name</code> is empty. |
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*/ |
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public BasicPermission(String name) |
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{ |
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super(name); |
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init(name); |
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} |
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/** |
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* Creates a new BasicPermission object with the specified name. |
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* The name is the symbolic name of the BasicPermission, and the |
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* actions String is currently unused. |
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* |
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* @param name the name of the BasicPermission. |
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* @param actions ignored. |
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* |
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* @throws NullPointerException if <code>name</code> is <code>null</code>. |
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* @throws IllegalArgumentException if <code>name</code> is empty. |
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*/ |
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public BasicPermission(String name, String actions) |
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{ |
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super(name); |
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init(name); |
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} |
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/** |
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* Checks if the specified permission is "implied" by |
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* this object. |
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* <P> |
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* More specifically, this method returns true if:<p> |
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* <ul> |
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* <li> <i>p</i>'s class is the same as this object's class, and<p> |
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* <li> <i>p</i>'s name equals or (in the case of wildcards) |
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* is implied by this object's |
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* name. For example, "a.b.*" implies "a.b.c". |
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* </ul> |
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* |
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* @param p the permission to check against. |
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* |
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* @return true if the passed permission is equal to or |
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* implied by this permission, false otherwise. |
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*/ |
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public boolean implies(Permission p) { |
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if ((p == null) || (p.getClass() != getClass())) |
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return false; |
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BasicPermission that = (BasicPermission) p; |
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if (this.wildcard) { |
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if (that.wildcard) { |
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// one wildcard can imply another |
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return that.path.startsWith(path); |
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} else { |
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// make sure ap.path is longer so a.b.* doesn't imply a.b |
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return (that.path.length() > this.path.length()) && |
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that.path.startsWith(this.path); |
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} |
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} else { |
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if (that.wildcard) { |
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// a non-wildcard can't imply a wildcard |
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return false; |
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} |
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else { |
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return this.path.equals(that.path); |
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} |
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} |
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} |
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/** |
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* Checks two BasicPermission objects for equality. |
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* Checks that <i>obj</i>'s class is the same as this object's class |
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* and has the same name as this object. |
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* <P> |
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* @param obj the object we are testing for equality with this object. |
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* @return true if <i>obj</i>'s class is the same as this object's class |
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* and has the same name as this BasicPermission object, false otherwise. |
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*/ |
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public boolean equals(Object obj) { |
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if (obj == this) |
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return true; |
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if ((obj == null) || (obj.getClass() != getClass())) |
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return false; |
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BasicPermission bp = (BasicPermission) obj; |
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return getName().equals(bp.getName()); |
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} |
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/** |
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* Returns the hash code value for this object. |
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* The hash code used is the hash code of the name, that is, |
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* <code>getName().hashCode()</code>, where <code>getName</code> is |
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* from the Permission superclass. |
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* |
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* @return a hash code value for this object. |
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*/ |
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public int hashCode() { |
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return this.getName().hashCode(); |
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} |
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/** |
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* Returns the canonical string representation of the actions, |
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* which currently is the empty string "", since there are no actions for |
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* a BasicPermission. |
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* |
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* @return the empty string "". |
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*/ |
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public String getActions() |
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{ |
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return ""; |
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} |
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/** |
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* Returns a new PermissionCollection object for storing BasicPermission |
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* objects. |
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* |
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* <p>BasicPermission objects must be stored in a manner that allows them |
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* to be inserted in any order, but that also enables the |
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* PermissionCollection <code>implies</code> method |
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* to be implemented in an efficient (and consistent) manner. |
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* |
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* @return a new PermissionCollection object suitable for |
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* storing BasicPermissions. |
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*/ |
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public PermissionCollection newPermissionCollection() { |
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return new BasicPermissionCollection(this.getClass()); |
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} |
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/** |
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* readObject is called to restore the state of the BasicPermission from |
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* a stream. |
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*/ |
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private void readObject(ObjectInputStream s) |
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throws IOException, ClassNotFoundException |
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{ |
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s.defaultReadObject(); |
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// init is called to initialize the rest of the values. |
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init(getName()); |
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} |
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/** |
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* Returns the canonical name of this BasicPermission. |
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* All internal invocations of getName should invoke this method, so |
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* that the pre-JDK 1.6 "exitVM" and current "exitVM.*" permission are |
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* equivalent in equals/hashCode methods. |
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* |
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* @return the canonical name of this BasicPermission. |
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*/ |
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final String getCanonicalName() { |
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return exitVM ? "exitVM.*" : getName(); |
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} |
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} |
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/** |
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* A BasicPermissionCollection stores a collection |
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* of BasicPermission permissions. BasicPermission objects |
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* must be stored in a manner that allows them to be inserted in any |
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* order, but enable the implies function to evaluate the implies |
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* method in an efficient (and consistent) manner. |
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* |
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* A BasicPermissionCollection handles comparing a permission like "a.b.c.d.e" |
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* with a Permission such as "a.b.*", or "*". |
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* |
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* @see java.security.Permission |
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* @see java.security.Permissions |
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* @see java.security.PermissionsImpl |
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* |
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* |
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* @author Roland Schemers |
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* |
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* @serial include |
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*/ |
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307 |
final class BasicPermissionCollection |
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extends PermissionCollection |
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implements java.io.Serializable |
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{ |
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private static final long serialVersionUID = 739301742472979399L; |
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/** |
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* Key is name, value is permission. All permission objects in |
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* collection must be of the same type. |
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* Not serialized; see serialization section at end of class. |
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*/ |
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private transient Map<String, Permission> perms; |
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/** |
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* This is set to <code>true</code> if this BasicPermissionCollection |
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* contains a BasicPermission with '*' as its permission name. |
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* |
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* @see #serialPersistentFields |
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*/ |
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private boolean all_allowed; |
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328 |
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/** |
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330 |
* The class to which all BasicPermissions in this |
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* BasicPermissionCollection belongs. |
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* |
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* @see #serialPersistentFields |
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*/ |
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private Class<?> permClass; |
2 | 336 |
|
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/** |
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* Create an empty BasicPermissionCollection object. |
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* |
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*/ |
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342 |
public BasicPermissionCollection(Class<?> clazz) { |
2 | 343 |
perms = new HashMap<String, Permission>(11); |
344 |
all_allowed = false; |
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permClass = clazz; |
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} |
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347 |
||
348 |
/** |
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* Adds a permission to the BasicPermissions. The key for the hash is |
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350 |
* permission.path. |
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351 |
* |
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352 |
* @param permission the Permission object to add. |
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353 |
* |
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354 |
* @exception IllegalArgumentException - if the permission is not a |
|
355 |
* BasicPermission, or if |
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356 |
* the permission is not of the |
|
357 |
* same Class as the other |
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358 |
* permissions in this collection. |
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359 |
* |
|
360 |
* @exception SecurityException - if this BasicPermissionCollection object |
|
361 |
* has been marked readonly |
|
362 |
*/ |
|
363 |
||
364 |
public void add(Permission permission) |
|
365 |
{ |
|
366 |
if (! (permission instanceof BasicPermission)) |
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367 |
throw new IllegalArgumentException("invalid permission: "+ |
|
368 |
permission); |
|
369 |
if (isReadOnly()) |
|
370 |
throw new SecurityException("attempt to add a Permission to a readonly PermissionCollection"); |
|
371 |
||
372 |
BasicPermission bp = (BasicPermission) permission; |
|
373 |
||
374 |
// make sure we only add new BasicPermissions of the same class |
|
375 |
// Also check null for compatibility with deserialized form from |
|
376 |
// previous versions. |
|
377 |
if (permClass == null) { |
|
378 |
// adding first permission |
|
379 |
permClass = bp.getClass(); |
|
380 |
} else { |
|
381 |
if (bp.getClass() != permClass) |
|
382 |
throw new IllegalArgumentException("invalid permission: " + |
|
383 |
permission); |
|
384 |
} |
|
385 |
||
386 |
synchronized (this) { |
|
387 |
perms.put(bp.getCanonicalName(), permission); |
|
388 |
} |
|
389 |
||
390 |
// No sync on all_allowed; staleness OK |
|
391 |
if (!all_allowed) { |
|
392 |
if (bp.getCanonicalName().equals("*")) |
|
393 |
all_allowed = true; |
|
394 |
} |
|
395 |
} |
|
396 |
||
397 |
/** |
|
398 |
* Check and see if this set of permissions implies the permissions |
|
399 |
* expressed in "permission". |
|
400 |
* |
|
401 |
* @param p the Permission object to compare |
|
402 |
* |
|
403 |
* @return true if "permission" is a proper subset of a permission in |
|
404 |
* the set, false if not. |
|
405 |
*/ |
|
406 |
||
407 |
public boolean implies(Permission permission) |
|
408 |
{ |
|
409 |
if (! (permission instanceof BasicPermission)) |
|
410 |
return false; |
|
411 |
||
412 |
BasicPermission bp = (BasicPermission) permission; |
|
413 |
||
414 |
// random subclasses of BasicPermission do not imply each other |
|
415 |
if (bp.getClass() != permClass) |
|
416 |
return false; |
|
417 |
||
418 |
// short circuit if the "*" Permission was added |
|
419 |
if (all_allowed) |
|
420 |
return true; |
|
421 |
||
422 |
// strategy: |
|
423 |
// Check for full match first. Then work our way up the |
|
424 |
// path looking for matches on a.b..* |
|
425 |
||
426 |
String path = bp.getCanonicalName(); |
|
427 |
//System.out.println("check "+path); |
|
428 |
||
429 |
Permission x; |
|
430 |
||
431 |
synchronized (this) { |
|
432 |
x = perms.get(path); |
|
433 |
} |
|
434 |
||
435 |
if (x != null) { |
|
436 |
// we have a direct hit! |
|
437 |
return x.implies(permission); |
|
438 |
} |
|
439 |
||
440 |
// work our way up the tree... |
|
441 |
int last, offset; |
|
442 |
||
443 |
offset = path.length()-1; |
|
444 |
||
445 |
while ((last = path.lastIndexOf(".", offset)) != -1) { |
|
446 |
||
447 |
path = path.substring(0, last+1) + "*"; |
|
448 |
//System.out.println("check "+path); |
|
449 |
||
450 |
synchronized (this) { |
|
451 |
x = perms.get(path); |
|
452 |
} |
|
453 |
||
454 |
if (x != null) { |
|
455 |
return x.implies(permission); |
|
456 |
} |
|
457 |
offset = last -1; |
|
458 |
} |
|
459 |
||
460 |
// we don't have to check for "*" as it was already checked |
|
461 |
// at the top (all_allowed), so we just return false |
|
462 |
return false; |
|
463 |
} |
|
464 |
||
465 |
/** |
|
466 |
* Returns an enumeration of all the BasicPermission objects in the |
|
467 |
* container. |
|
468 |
* |
|
469 |
* @return an enumeration of all the BasicPermission objects. |
|
470 |
*/ |
|
471 |
||
472 |
public Enumeration<Permission> elements() { |
|
473 |
// Convert Iterator of Map values into an Enumeration |
|
474 |
synchronized (this) { |
|
475 |
return Collections.enumeration(perms.values()); |
|
476 |
} |
|
477 |
} |
|
478 |
||
479 |
// Need to maintain serialization interoperability with earlier releases, |
|
480 |
// which had the serializable field: |
|
481 |
// |
|
482 |
// @serial the Hashtable is indexed by the BasicPermission name |
|
483 |
// |
|
484 |
// private Hashtable permissions; |
|
485 |
/** |
|
486 |
* @serialField permissions java.util.Hashtable |
|
487 |
* The BasicPermissions in this BasicPermissionCollection. |
|
488 |
* All BasicPermissions in the collection must belong to the same class. |
|
489 |
* The Hashtable is indexed by the BasicPermission name; the value |
|
490 |
* of the Hashtable entry is the permission. |
|
491 |
* @serialField all_allowed boolean |
|
492 |
* This is set to <code>true</code> if this BasicPermissionCollection |
|
493 |
* contains a BasicPermission with '*' as its permission name. |
|
494 |
* @serialField permClass java.lang.Class |
|
495 |
* The class to which all BasicPermissions in this |
|
496 |
* BasicPermissionCollection belongs. |
|
497 |
*/ |
|
498 |
private static final ObjectStreamField[] serialPersistentFields = { |
|
499 |
new ObjectStreamField("permissions", Hashtable.class), |
|
500 |
new ObjectStreamField("all_allowed", Boolean.TYPE), |
|
501 |
new ObjectStreamField("permClass", Class.class), |
|
502 |
}; |
|
503 |
||
504 |
/** |
|
505 |
* @serialData Default fields. |
|
506 |
*/ |
|
507 |
/* |
|
508 |
* Writes the contents of the perms field out as a Hashtable for |
|
509 |
* serialization compatibility with earlier releases. all_allowed |
|
510 |
* and permClass unchanged. |
|
511 |
*/ |
|
512 |
private void writeObject(ObjectOutputStream out) throws IOException { |
|
513 |
// Don't call out.defaultWriteObject() |
|
514 |
||
515 |
// Copy perms into a Hashtable |
|
516 |
Hashtable<String, Permission> permissions = |
|
7970
af1579474d16
7008728: diamond conversion of basic security, permissions, authentication
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diff
changeset
|
517 |
new Hashtable<>(perms.size()*2); |
2 | 518 |
|
519 |
synchronized (this) { |
|
520 |
permissions.putAll(perms); |
|
521 |
} |
|
522 |
||
523 |
// Write out serializable fields |
|
524 |
ObjectOutputStream.PutField pfields = out.putFields(); |
|
525 |
pfields.put("all_allowed", all_allowed); |
|
526 |
pfields.put("permissions", permissions); |
|
527 |
pfields.put("permClass", permClass); |
|
528 |
out.writeFields(); |
|
529 |
} |
|
530 |
||
531 |
/** |
|
532 |
* readObject is called to restore the state of the |
|
533 |
* BasicPermissionCollection from a stream. |
|
534 |
*/ |
|
535 |
private void readObject(java.io.ObjectInputStream in) |
|
536 |
throws IOException, ClassNotFoundException |
|
537 |
{ |
|
538 |
// Don't call defaultReadObject() |
|
539 |
||
540 |
// Read in serialized fields |
|
541 |
ObjectInputStream.GetField gfields = in.readFields(); |
|
542 |
||
543 |
// Get permissions |
|
10336
0bb1999251f8
7064075: Security libraries don't build with javac -Xlint:all,-deprecation -Werror
jjg
parents:
9035
diff
changeset
|
544 |
// writeObject writes a Hashtable<String, Permission> for the |
0bb1999251f8
7064075: Security libraries don't build with javac -Xlint:all,-deprecation -Werror
jjg
parents:
9035
diff
changeset
|
545 |
// permissions key, so this cast is safe, unless the data is corrupt. |
0bb1999251f8
7064075: Security libraries don't build with javac -Xlint:all,-deprecation -Werror
jjg
parents:
9035
diff
changeset
|
546 |
@SuppressWarnings("unchecked") |
2 | 547 |
Hashtable<String, Permission> permissions = |
548 |
(Hashtable<String, Permission>)gfields.get("permissions", null); |
|
549 |
perms = new HashMap<String, Permission>(permissions.size()*2); |
|
550 |
perms.putAll(permissions); |
|
551 |
||
552 |
// Get all_allowed |
|
553 |
all_allowed = gfields.get("all_allowed", false); |
|
554 |
||
555 |
// Get permClass |
|
10336
0bb1999251f8
7064075: Security libraries don't build with javac -Xlint:all,-deprecation -Werror
jjg
parents:
9035
diff
changeset
|
556 |
permClass = (Class<?>) gfields.get("permClass", null); |
2 | 557 |
|
558 |
if (permClass == null) { |
|
559 |
// set permClass |
|
560 |
Enumeration<Permission> e = permissions.elements(); |
|
561 |
if (e.hasMoreElements()) { |
|
562 |
Permission p = e.nextElement(); |
|
563 |
permClass = p.getClass(); |
|
564 |
} |
|
565 |
} |
|
566 |
} |
|
567 |
} |