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1 files changed, 153 insertions, 0 deletions

diff --git a/libjava/classpath/java/security/acl/Acl.java b/libjava/classpath/java/security/acl/Acl.java
new file mode 100644
index 000000000..10a59fdf5
--- /dev/null
+++ b/libjava/classpath/java/security/acl/Acl.java
@@ -0,0 +1,153 @@
+/* Acl.java -- An access control list
+   Copyright (C) 1998 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.acl;
+
+import java.security.Principal;
+import java.util.Enumeration;
+
+/**
+ * A Java access control list (ACL) is a group of individual ACL entries.
+ * These entries consist of a <code>Principal</code> and a list of
+ * permissions this <code>Principal</code> is either granted or denied.
+ * A given <code>Principal</code> can have at most one positive ACL entry
+ * (i.e., one that grants permissions) and one negative ACL entry (i.e., one
+ * that denies permissions).  If a given permission is both granted and
+ * denied, the ACL treats it as if it were never granted or denied.  If
+ * both a <code>Principal</code> and a <code>Group</code> to which the
+ * <code>Principal</code> belongs have an ACL entry, the permissions for
+ * the individual <code>Principal</code> take precedence over the
+ * permissions of the <code>Group</code> if there is a conflict.
+ * <p>
+ * Additionally, the ACL interface extends the <code>Owner</code> interface
+ * and so an ACL has owners.  Actions which modify the ACL are restricted
+ * to owners.
+ *
+ * @version 0.0
+ *
+ * @author Aaron M. Renn (arenn@urbanophile.com)
+ */
+public interface Acl extends Owner
+{
+
+  /**
+   * This method returns the name of this ACL.
+   *
+   * @return The name of this ACL
+   */
+  String getName();
+
+  /**
+   * This method sets the name of the ACL
+   *
+   * @param caller The <code>Principal</code> requesting the action.
+   * @param name The new name for this ACL.
+   *
+   * @exception NotOwnerException If the caller is not an owner of this ACL.
+   */
+  void setName(Principal caller, String name)
+    throws NotOwnerException;
+
+  /**
+   * This method adds the specified entry to the ACL
+   *
+   * @param caller The <code>Principal</code> requesting the addition
+   * @param entry The ACL entry to add
+   *
+   * @return <code>true</code> if the entry was added, <code>false</code>
+   * if there is already an entry of the same type for the
+   * <code>Principal</code>.
+   *
+   * @exception NotOwnerException If the caller is not an owner of this ACL.
+   */
+  boolean addEntry(Principal caller, AclEntry entry)
+    throws NotOwnerException;
+
+  /**
+   * This method delets the specified entry from the ACL
+   *
+   * @param caller The <code>Principal</code> requesting the deletion.
+   * @param entry The ACL entry to delete
+   *
+   * @return <code>true</code> if the entry was deleted, or <code>false</code>
+   * if this entry was not part of the ACL to begin with
+   *
+   * @exception NotOwnerException If the caller is not an owner of this ACL.
+   */
+  boolean removeEntry(Principal caller, AclEntry entry)
+    throws NotOwnerException;
+
+  /**
+   * This method returns a list of all the entries in the ACL as an
+   * <code>Enumeration</code>.
+   *
+   * @return An enumeration of the ACL entries
+   */
+  Enumeration<AclEntry> entries();
+
+  /**
+   * This method tests whether or not the specified <code>Principal</code>
+   * has the specified <code>Permission</code>
+   *
+   * @param user The <code>Principal</code> to test
+   * @param perm The <code>Permission</code> to test for
+   *
+   * @return <code>true</code> if the user has been granted the permission,
+   * <code>false</code> otherwise
+   */
+  boolean checkPermission(Principal user, Permission perm);
+
+  /**
+   * This method returns a list of <code>Permission</code>'s that are granted
+   * to a particular <code>Principal</code>.  This includes any permissions
+   * that are granted to <code>Group</code>'s to which the <code>Principal</code>
+   * belongs unless they are overridden by a negative ACL.  This permission
+   * list is returned as an <code>Enumeration</code>.
+   *
+   * @param user The <code>Principal</code> to retrieve permissions for.
+   *
+   * @return A list of permissions for the <code>Principal</code>.
+   */
+  Enumeration<Permission> getPermissions(Principal user);
+
+  /**
+   * This method returns the ACL as a <code>String</code>
+   *
+   * @return A <code>String</code> representation of this ACL
+   */
+  String toString();
+}