+++ /dev/null
-/* java.lang.reflect.AccessibleObject
- Copyright (C) 2001 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., 59 Temple Place, Suite 330, Boston, MA
-02111-1307 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.lang.reflect;
-
-/**
- * This class is the superclass of various reflection classes, and
- * allows sufficiently trusted code to bypass normal restrictions to
- * do necessary things like invoke private methods outside of the
- * class during Serialization. If you don't have a good reason
- * to mess with this, don't try. Fortunately, there are adequate
- * security checks before you can set a reflection object as accessible.
- *
- * @author Tom Tromey <tromey@cygnus.com>
- * @author Eric Blake <ebb9@email.byu.edu>
- * @see Field
- * @see Constructor
- * @see Method
- * @see ReflectPermission
- * @since 1.2
- * @status updated to 1.4
- */
-public class AccessibleObject
-{
- /**
- * True if this object is marked accessible, which means the reflected
- * object bypasses normal security checks. <em>NOTE</em>Don't try messing
- * with this by reflection. You'll mess yourself up.
- */
- // default visibility for use by inherited classes
- boolean flag = false;
-
- /**
- * Only the three reflection classes that extend this can create an
- * accessible object. This is not serializable for security reasons.
- */
- protected AccessibleObject()
- {
- }
-
- /**
- * Return the accessibility status of this object.
- *
- * @return true if this object bypasses security checks
- */
- public boolean isAccessible()
- {
- return flag;
- }
-
- /**
- * Convenience method to set the flag on a number of objects with a single
- * security check. If a security manager exists, it is checked for
- * <code>ReflectPermission("suppressAccessChecks")</code>.<p>
- *
- * If <code>flag</code> is true, and the initial security check succeeds,
- * this can still fail if a forbidden object is encountered, leaving the
- * array half-modified. At the moment, the forbidden members are:<br>
- * <ul>
- * <li>Any Constructor for java.lang.Class</li>
- * <li>Any AccessibleObject for java.lang.reflect.AccessibleObject
- * (this is not specified by Sun, but it closes a big security hole
- * where you can use reflection to bypass the security checks that
- * reflection is supposed to provide)</li>
- * </ul>
- * (Sun has not specified others, but good candidates might include
- * ClassLoader, String, and such. However, the more checks we do, the
- * slower this method gets).
- *
- * @param array the array of accessible objects
- * @param flag the desired state of accessibility, true to bypass security
- * @throws NullPointerException if array is null
- * @throws SecurityException if the request is denied
- * @see SecurityManager#checkPermission(java.security.Permission)
- * @see RuntimePermission
- */
- public static void setAccessible(AccessibleObject[] array, boolean flag)
- {
- checkPermission();
- for (int i = 0; i < array.length; i++)
- array[i].secureSetAccessible(flag);
- }
-
- /**
- * Sets the accessibility flag for this reflection object. If a security
- * manager exists, it is checked for
- * <code>ReflectPermission("suppressAccessChecks")</code>.<p>
- *
- * If <code>flag</code> is true, and the initial security check succeeds,
- * this will still fail for a forbidden object. At the moment, the
- * forbidden members are:<br>
- * <ul>
- * <li>Any Constructor for java.lang.Class</li>
- * <li>Any AccessibleObject for java.lang.reflect.AccessibleObject
- * (this is not specified by Sun, but it closes a big security hole
- * where you can use reflection to bypass the security checks that
- * reflection is supposed to provide)</li>
- * </ul>
- * (Sun has not specified others, but good candidates might include
- * ClassLoader, String, and such. However, the more checks we do, the
- * slower this method gets).
- *
- * @param flag the desired state of accessibility, true to bypass security
- * @throws NullPointerException if array is null
- * @throws SecurityException if the request is denied
- * @see SecurityManager#checkPermission(java.security.Permission)
- * @see RuntimePermission
- */
- public void setAccessible(boolean flag)
- {
- checkPermission();
- secureSetAccessible(flag);
- }
-
- /**
- * Performs the specified security check, for
- * <code>ReflectPermission("suppressAccessChecks")</code>.
- *
- * @throws SecurityException if permission is denied
- */
- private static final void checkPermission()
- {
- SecurityManager sm = System.getSecurityManager();
- if (sm != null)
- sm.checkPermission(new ReflectPermission("suppressAccessChecks"));
- }
-
- /**
- * Performs the actual accessibility change, this must always be invoked
- * after calling checkPermission.
- *
- * @param flag the desired status
- * @throws SecurityException if flag is true and this is one of the
- * forbidden members mentioned in {@link setAccessible(boolean)}.
- */
- private final void secureSetAccessible(boolean flag)
- {
- if (flag &&
- ((this instanceof Constructor
- && ((Constructor) this).getDeclaringClass() == Class.class)
- || ((Member) this).getDeclaringClass() == AccessibleObject.class))
- throw new SecurityException("Cannot make object accessible: " + this);
- this.flag = flag;
- }
-}
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