--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.security.acl/share/classes/java/security/acl/AclEntry.java Sun Aug 17 15:54:13 2014 +0100
@@ -0,0 +1,154 @@
+/*
+ * Copyright (c) 1996, 2013, 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.acl;
+
+import java.util.Enumeration;
+import java.security.Principal;
+
+/**
+ * This is the interface used for representing one entry in an Access
+ * Control List (ACL).<p>
+ *
+ * An ACL can be thought of as a data structure with multiple ACL entry
+ * objects. Each ACL entry object contains a set of permissions associated
+ * with a particular principal. (A principal represents an entity such as
+ * an individual user or a group). Additionally, each ACL entry is specified
+ * as being either positive or negative. If positive, the permissions are
+ * to be granted to the associated principal. If negative, the permissions
+ * are to be denied. Each principal can have at most one positive ACL entry
+ * and one negative entry; that is, multiple positive or negative ACL
+ * entries are not allowed for any principal.
+ *
+ * Note: ACL entries are by default positive. An entry becomes a
+ * negative entry only if the
+ * {@link #setNegativePermissions() setNegativePermissions}
+ * method is called on it.
+ *
+ * @see java.security.acl.Acl
+ *
+ * @author Satish Dharmaraj
+ */
+public interface AclEntry extends Cloneable {
+
+ /**
+ * Specifies the principal for which permissions are granted or denied
+ * by this ACL entry. If a principal was already set for this ACL entry,
+ * false is returned, otherwise true is returned.
+ *
+ * @param user the principal to be set for this entry.
+ *
+ * @return true if the principal is set, false if there was
+ * already a principal set for this entry.
+ *
+ * @see #getPrincipal
+ */
+ public boolean setPrincipal(Principal user);
+
+ /**
+ * Returns the principal for which permissions are granted or denied by
+ * this ACL entry. Returns null if there is no principal set for this
+ * entry yet.
+ *
+ * @return the principal associated with this entry.
+ *
+ * @see #setPrincipal
+ */
+ public Principal getPrincipal();
+
+ /**
+ * Sets this ACL entry to be a negative one. That is, the associated
+ * principal (e.g., a user or a group) will be denied the permission set
+ * specified in the entry.
+ *
+ * Note: ACL entries are by default positive. An entry becomes a
+ * negative entry only if this {@code setNegativePermissions}
+ * method is called on it.
+ */
+ public void setNegativePermissions();
+
+ /**
+ * Returns true if this is a negative ACL entry (one denying the
+ * associated principal the set of permissions in the entry), false
+ * otherwise.
+ *
+ * @return true if this is a negative ACL entry, false if it's not.
+ */
+ public boolean isNegative();
+
+ /**
+ * Adds the specified permission to this ACL entry. Note: An entry can
+ * have multiple permissions.
+ *
+ * @param permission the permission to be associated with
+ * the principal in this entry.
+ *
+ * @return true if the permission was added, false if the
+ * permission was already part of this entry's permission set.
+ */
+ public boolean addPermission(Permission permission);
+
+ /**
+ * Removes the specified permission from this ACL entry.
+ *
+ * @param permission the permission to be removed from this entry.
+ *
+ * @return true if the permission is removed, false if the
+ * permission was not part of this entry's permission set.
+ */
+ public boolean removePermission(Permission permission);
+
+ /**
+ * Checks if the specified permission is part of the
+ * permission set in this entry.
+ *
+ * @param permission the permission to be checked for.
+ *
+ * @return true if the permission is part of the
+ * permission set in this entry, false otherwise.
+ */
+ public boolean checkPermission(Permission permission);
+
+ /**
+ * Returns an enumeration of the permissions in this ACL entry.
+ *
+ * @return an enumeration of the permissions in this ACL entry.
+ */
+ public Enumeration<Permission> permissions();
+
+ /**
+ * Returns a string representation of the contents of this ACL entry.
+ *
+ * @return a string representation of the contents.
+ */
+ public String toString();
+
+ /**
+ * Clones this ACL entry.
+ *
+ * @return a clone of this ACL entry.
+ */
+ public Object clone();
+}