1 files changed, 43 insertions, 18 deletions
diff --git a/libjava/java/security/GuardedObject.java b/libjava/java/security/GuardedObject.java
index 2aa13e1..f07d811 100644
--- a/libjava/java/security/GuardedObject.java
+++ b/libjava/java/security/GuardedObject.java
@@ -1,5 +1,5 @@
 /* GuardedObject.java -- An object protected by a Guard
-   Copyright (C) 1998 Free Software Foundation, Inc.
+   Copyright (C) 1998, 2002 Free Software Foundation, Inc.
 
 This file is part of GNU Classpath.
 
@@ -38,38 +38,50 @@ exception statement from your version. */
 package java.security;
 
 import java.io.Serializable;
+import java.io.IOException;
+import java.io.ObjectOutputStream;
 
 /**
  * This class is an object that is guarded by a <code>Guard</code> object.
- * The object that is being guarded is retrieved by a call to the only 
+ * The object that is being guarded is retrieved by a call to the only
  * method in this class - <code>getObject</code>.  That method returns the
- * guarded <code>Object</code> after first checking with the 
+ * guarded <code>Object</code> after first checking with the
  * <code>Guard</code>.  If the <code>Guard</code> disallows access, an
  * exception will be thrown.
  *
- * @version 0.0
- *
- * @author Aaron M. Renn (arenn@urbanophile.com)
+ * @author Aaron M. Renn <arenn@urbanophile.com>
+ * @since 1.1
+ * @status updated to 1.4
  */
 public class GuardedObject implements Serializable
 {
   /**
+   * Compatible with JDK 1.1+.
+   */
+  private static final long serialVersionUID = -5240450096227834308L;
+
+  /**
    * This is the Guard that is protecting the object.
+   *
+   * @serial the guard
    */
-  private Guard guard;
+  private final Guard guard;
 
   /**
    * This is the object that is being guarded.
+   *
+   * @serial the protected object
    */
-  private Object object;
+  private final Object object;
 
   /**
    * This method initializes a new instance of <code>GuardedObject</code>
    * that protects the specified <code>Object</code> using the specified
-   * <code>Guard</code>
+   * <code>Guard</code>. A null guard means there are no restrictions on
+   * accessing the object.
    *
-   * @param object The <code>Object</code> to guard
-   * @param guard The <code>Guard</code> that is protecting the object.
+   * @param object the <code>Object</code> to guard
+   * @param guard the <code>Guard</code> that is protecting the object
    */
   public GuardedObject(Object object, Guard guard)
   {
@@ -78,18 +90,31 @@ public class GuardedObject implements Serializable
   }
 
   /**
-   * This method first call the <code>checkGuard</code> method on the 
-   * <code>Guard</code> object protecting the guarded object.  If the 
+   * This method first call the <code>checkGuard</code> method on the
+   * <code>Guard</code> object protecting the guarded object.  If the
    * <code>Guard</code> disallows access, an exception is thrown, otherwise
    * the <code>Object</code> is returned.
    *
    * @return The object being guarded
+   * @throws SecurityException if access is denied
+   */
+  public Object getObject()
+  {
+    if (guard != null)
+      guard.checkGuard(object);
+    return object;
+  }
+
+  /**
+   * Ensures that serialization is legal, by checking the guard.
    *
-   * @exception SecurityException If the <code>Guard</code> disallows access to the object.
+   * @param s the stream to write to
+   * @throws IOException if the underlying stream fails
    */
-  public Object getObject() throws SecurityException
+  private void writeObject(ObjectOutputStream s) throws IOException
   {
-    guard.checkGuard(object);
-    return (object);
+    if (guard != null)
+      guard.checkGuard(object);
+    s.defaultWriteObject();
   }
-}
+} // class GuardedObject