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diff --git a/libjava/java/security/ProtectionDomain.java b/libjava/java/security/ProtectionDomain.java
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+/* ProtectionDomain.java -- A security domain
+   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., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+As a special exception, if you link this library with other files to
+produce an executable, this library does not by itself cause the
+resulting executable to be covered by the GNU General Public License.
+This exception does not however invalidate any other reasons why the
+executable file might be covered by the GNU General Public License. */
+
+package java.security;
+
+/**
+ * This class represents a group of classes, along with the permissions
+ * they are granted.  The classes are identified by a <code>CodeSource</code>.
+ * Thus, any class loaded from the specified <code>CodeSource</code> is
+ * treated as part of this domain.  The set of permissions is represented
+ * by a <code>PermissionCollection</code>.
+ * <p>
+ * Every class in the system will belong to one and only one
+ * <code>ProtectionDomain</code>.
+ *
+ * @version 0.0
+ *
+ * @author Aaron M. Renn (arenn@urbanophile.com)
+ */
+public class ProtectionDomain
+{
+  private static final String linesep = System.getProperty("line.separator");
+
+  /**
+   * This is the <code>CodeSource</code> for this protection domain
+   */
+  private CodeSource code_source;
+
+  /**
+   * This is the set of permissions granted to this domain
+   */
+  private PermissionCollection perms;
+
+  /**
+   * This method initializes a new instance of <code>ProtectionDomain</code>
+   * representing the specified <code>CodeSource</code> and permission set.
+   * No permissions may be added to the <code>PermissionCollection</code>
+   * and this contructor will call the <code>setReadOnly</code> method on
+   * the specified permission set.
+   *
+   * @param code_source The <code>CodeSource</code> for this domain
+   * @param perms The permission set for this domain
+   *
+   * @see java.security.PermissionCollection#setReadOnly()
+   */
+  public ProtectionDomain(CodeSource code_source, PermissionCollection perms)
+  {
+    this.code_source = code_source;
+    this.perms = perms;
+    if (perms != null)
+      perms.setReadOnly();
+  }
+
+  /**
+     * This method returns the <code>CodeSource</code> for this domain.
+     *
+     * @return This domain's <code>CodeSource</code>.
+   */
+  public final CodeSource getCodeSource()
+  {
+    return code_source;
+  }
+
+  /**
+   * This method returns the set of permissions granted to this domain.
+   *
+   * @return The permission set for this domain
+   */
+  public final PermissionCollection getPermissions()
+  {
+    return perms;
+  }
+
+  /**
+   * This method tests whether or not the specified <code>Permission</code> is
+   * implied by the set of permissions granted to this domain.
+   *
+   * @param perm The <code>Permission</code> to test.
+   *
+   * @return <code>true</code> if the specified <code>Permission</code> is implied for this domain, <code>false</code> otherwise.
+   */
+  public boolean implies(Permission perm)
+  {
+    PermissionCollection pc = getPermissions();
+    if (pc == null)
+      return (false);
+
+    return (pc.implies(perm));
+  }
+
+  /**
+   * This method returns a <code>String</code> representation of this
+   * object.  It will print the <code>CodeSource</code> and 
+   * permission set associated with this domain.
+   *
+   * @return A <code>String</code> representation of this object.
+   */
+  public String toString()
+  {
+    StringBuffer sb = new StringBuffer("");
+
+    sb.append(super.toString() + " (" + linesep);
+    sb.append(code_source.toString());
+    sb.append(perms.toString());
+    sb.append(")" + linesep);
+
+    return sb.toString();
+  }
+}