jdk/src/share/classes/java/nio/file/LinkPermission.java
changeset 2057 3acf8e5e2ca0
child 2072 80dfe4469bbd
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/java/nio/file/LinkPermission.java	Sun Feb 15 12:25:54 2009 +0000
@@ -0,0 +1,107 @@
+/*
+ * Copyright 2007-2009 Sun Microsystems, Inc.  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.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package java.nio.file;
+
+import java.security.BasicPermission;
+
+/**
+ * The {@code Permission} class for link creation operations.
+ *
+ * <p> The following table provides a summary description of what the permission
+ * allows, and discusses the risks of granting code the permission.
+ *
+ * <table border=1 cellpadding=5
+ *        summary="Table shows permission target name, what the permission allows, and associated risks">
+ * <tr>
+ * <th>Permission Target Name</th>
+ * <th>What the Permission Allows</th>
+ * <th>Risks of Allowing this Permission</th>
+ * </tr>
+ * <tr>
+ *   <td>hard</td>
+ *   <td> Ability to add an existing file to a directory. This is sometimes
+ *   known as creating a link, or hard link. </td>
+ *   <td> Extreme care should be taken when granting this permission. It allows
+ *   linking to any file or directory in the file system thus allowing the
+ *   attacker to access to all files. </td>
+ * </tr>
+ * <tr>
+ *   <td>symbolic</td>
+ *   <td> Ability to create symbolic links. </td>
+ *   <td> Extreme care should be taken when granting this permission. It allows
+ *   linking to any file or directory in the file system thus allowing the
+ *   attacker to access to all files. </td>
+ * </tr>
+ * </table>
+ *
+ * @since 1.7
+ *
+ * @see Path#createLink
+ * @see Path#createSymbolicLink
+ */
+public final class LinkPermission extends BasicPermission {
+    static final long serialVersionUID = -1441492453772213220L;
+
+    private void checkName(String name) {
+        if (!name.equals("hard") && !name.equals("symbolic")) {
+            throw new IllegalArgumentException("name: " + name);
+        }
+    }
+
+    /**
+     * Constructs a {@code LinkPermission} with the specified name.
+     *
+     * @param   name
+     *          The name of the permission. It must be "hard" or "symbolic".
+     *
+     * @throws  IllegalArgumentException
+     *          If name is empty or invalid.
+     */
+    public LinkPermission(String name) {
+        super(name);
+        checkName(name);
+    }
+
+    /**
+     * Constructs a {@code LinkPermission} with the specified name.
+     *
+     * @param   name
+     *          The name of the permission; must be "hard" or "symbolic".
+     * @param   actions
+     *          The actions for the permission; must be the empty string or
+     *          {@code null}
+     *
+     * @throws  IllegalArgumentException
+     *          If name is empty or invalid.
+     */
+    public LinkPermission(String name, String actions) {
+        super(name);
+        checkName(name);
+        if (actions != null && actions.length() > 0) {
+            throw new IllegalArgumentException("actions: " + actions);
+        }
+    }
+}