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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/java/security/AllPermission.java | |
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Diffstat (limited to 'libjava/classpath/java/security/AllPermission.java')
-rw-r--r-- | libjava/classpath/java/security/AllPermission.java | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/libjava/classpath/java/security/AllPermission.java b/libjava/classpath/java/security/AllPermission.java new file mode 100644 index 000000000..6adcd8c9c --- /dev/null +++ b/libjava/classpath/java/security/AllPermission.java @@ -0,0 +1,198 @@ +/* AllPermission.java -- Permission to do anything + Copyright (C) 1998, 2001, 2002, 2004, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.security; + +import gnu.java.util.EmptyEnumeration; + +import java.util.Collections; +import java.util.Enumeration; + +/** + * This class is a permission that implies all other permissions. Granting + * this permission effectively grants all others. Extreme caution should + * be exercised in granting this permission. + * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Eric Blake (ebb9@email.byu.edu) + * @see AccessController + * @see Permissions + * @see SecurityManager + * @since 1.1 + * @status updated to 1.4 + */ +public final class AllPermission extends Permission +{ + /** + * Compatible with JDK 1.1+. + */ + private static final long serialVersionUID = -2916474571451318075L; + + /** + * Create a new AllPermission object. + */ + public AllPermission() + { + super("*"); + } + + /** + * Create a new AllPermission object. The parameters are ignored, as all + * permission implies ALL PERMISSION. + * + * @param name ignored + * @param actions ignored + */ + public AllPermission(String name, String actions) + { + super("*"); + } + + /** + * This method always returns <code>true</code> to indicate that this + * permission always implies that any other permission is also granted. + * + * @param perm ignored + * @return true, the permission is implied + */ + public boolean implies(Permission perm) + { + return true; + } + + /** + * Checks an object for equality. All AllPermissions are equal. + * + * @param obj the <code>Object</code> to test for equality + */ + public boolean equals(Object obj) + { + return obj instanceof AllPermission; + } + + /** + * This method returns a hash code for this object. This returns 1. + * + * @return a hash value for this object + */ + public int hashCode() + { + return 1; + } + + /** + * This method returns the list of actions associated with this object. + * This will always be the empty string ("") for this class. + * + * @return the action list + */ + public String getActions() + { + return ""; + } + + /** + * Returns a PermissionCollection which can hold AllPermission. + * + * @return a permission collection + */ + public PermissionCollection newPermissionCollection() + { + return new AllPermissionCollection(); + } + + /** + * Implements AllPermission.newPermissionCollection, and obeys serialization + * of JDK. + * + * @author Eric Blake (ebb9@email.byu.edu) + */ + private static final class AllPermissionCollection extends PermissionCollection + { + /** + * Compatible with JDK 1.1+. + */ + private static final long serialVersionUID = -4023755556366636806L; + + /** + * Whether an AllPermission has been added to the collection. + * + * @serial if all permission is in the collection yet + */ + private boolean all_allowed; + + /** + * Add an AllPermission. + * + * @param perm the permission to add + * @throws IllegalArgumentException if perm is not an AllPermission + * @throws SecurityException if the collection is read-only + */ + public void add(Permission perm) + { + if (isReadOnly()) + throw new SecurityException(); + if (! (perm instanceof AllPermission)) + throw new IllegalArgumentException(); + all_allowed = true; + } + + /** + * Returns true if this collection implies a permission. + * + * @param perm the permission to check + * @return true if this collection contains an AllPermission + */ + public boolean implies(Permission perm) + { + return all_allowed; + } + + /** + * Returns an enumeration of the elements in the collection. + * + * @return the elements in the collection + */ + public Enumeration elements() + { + return all_allowed + ? Collections.enumeration(Collections.singleton(new AllPermission())) + : EmptyEnumeration.getInstance(); + } + } // class AllPermissionCollection +} // class AllPermission |