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Diffstat (limited to 'libjava/java/security/Permission.java')
| -rw-r--r-- | libjava/java/security/Permission.java | 187 |
1 files changed, 0 insertions, 187 deletions
diff --git a/libjava/java/security/Permission.java b/libjava/java/security/Permission.java deleted file mode 100644 index 48f4d52..0000000 --- a/libjava/java/security/Permission.java +++ /dev/null @@ -1,187 +0,0 @@ -/* Permission.java -- The superclass for all permission objects - Copyright (C) 1998, 2001, 2002, 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 java.io.Serializable; - -/** - * This class is the abstract superclass of all classes that implement - * the concept of a permission. A permission consists of a permission name - * and optionally a list of actions that relate to the permission. The - * actual meaning of the name of the permission is defined only in the - * context of a subclass. It may name a resource to which access permissions - * are granted (for example, the name of a file) or it might represent - * something else entirely. Similarly, the action list only has meaning - * within the context of a subclass. Some permission names may have no - * actions associated with them. That is, you either have the permission - * or you don't. - * - * <p>The most important method in this class is <code>implies</code>. This - * checks whether if one has this permission, then the specified - * permission is also implied. As a conceptual example, consider the - * permissions "Read All Files" and "Read File foo". The permission - * "Read All Files" implies that the caller has permission to read the - * file foo. - * - * <p><code>Permission</code>'s must be immutable - do not change their - * state after creation. - * - * @author Aaron M. Renn (arenn@urbanophile.com) - * @see Permissions - * @see PermissionCollection - * @since 1.1 - * @status updated to 1.4 - */ -public abstract class Permission implements Guard, Serializable -{ - /** - * Compatible with JDK 1.1+. - */ - private static final long serialVersionUID = -5636570222231596674L; - - /** - * This is the name assigned to this permission object. - * - * @serial the name of the permission - */ - private String name; - - /** - * Create an instance with the specified name. - * - * @param name the permission name - */ - public Permission(String name) - { - this.name = name; - } - - /** - * This method implements the <code>Guard</code> interface for this class. - * It calls the <code>checkPermission</code> method in - * <code>SecurityManager</code> with this <code>Permission</code> as its - * argument. This method returns silently if the security check succeeds - * or throws an exception if it fails. - * - * @param obj the <code>Object</code> being guarded - ignored by this class - * @throws SecurityException if the security check fails - * @see GuardedObject - * @see SecurityManager#checkPermission(Permission) - */ - public void checkGuard(Object obj) - { - SecurityManager sm = System.getSecurityManager(); - if (sm != null) - sm.checkPermission(this); - } - - /** - * This method tests whether this <code>Permission</code> implies that the - * specified <code>Permission</code> is also granted. - * - * @param perm the <code>Permission</code> to test against - * @return true if perm is implied by this - */ - public abstract boolean implies(Permission perm); - - /** - * Check to see if this object equals obj. Use <code>implies</code>, rather - * than <code>equals</code>, when making access control decisions. - * - * @param obj the object to compare to - */ - public abstract boolean equals(Object obj); - - /** - * This method returns a hash code for this <code>Permission</code>. It - * must satisfy the contract of <code>Object.hashCode</code>: it must be - * the same for all objects that equals considers to be the same. - * - * @return a hash value - */ - public abstract int hashCode(); - - /** - * Get the name of this <code>Permission</code>. - * - * @return the name - */ - public final String getName() - { - return name; - } - - /** - * This method returns the list of actions for this <code>Permission</code> - * as a <code>String</code>. The string should be in canonical order, for - * example, both <code>new FilePermission(f, "write,read")</code> and - * <code>new FilePermission(f, "read,write")</code> have the action list - * "read,write". - * - * @return the action list for this <code>Permission</code> - */ - public abstract String getActions(); - - /** - * This method returns an empty <code>PermissionCollection</code> object - * that can store permissions of this type, or <code>null</code> if no - * such collection is defined. Subclasses must override this to provide - * an appropriate collection when one is needed to accurately calculate - * <code>implies</code>. - * - * @return a new <code>PermissionCollection</code> - */ - public PermissionCollection newPermissionCollection() - { - return null; - } - - /** - * This method returns a <code>String</code> representation of this - * <code>Permission</code> object. This is in the format: - * <code>'(' + getClass().getName() + ' ' + getName() + ' ' + getActions - * + ')'</code>. - * - * @return this object as a <code>String</code> - */ - public String toString() - { - return '(' + getClass().getName() + ' ' + getName() + ' ' - + getActions() + ')'; - } -} // class Permission |