--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/servlet/src/digilib/auth/AuthOpsImpl.java	Thu Jan 17 15:25:46 2002 +0100
@@ -0,0 +1,77 @@
+/*  AuthOps -- Authentication class implementation
+
+  Digital Image Library servlet components
+
+  Copyright (C) 2001, 2002 Robert Casties (robcast@mail.berlios.de)
+
+  This program 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 of the  License, or (at your
+  option) any later version.
+   
+  Please read license.txt for the full details. A copy of the GPL
+  may be found at http://www.gnu.org/copyleft/lgpl.html
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+*/
+
+package digilib.auth;
+
+import javax.servlet.http.HttpServletRequest;
+import java.util.*;
+
+import digilib.*;
+
+public abstract class AuthOpsImpl implements AuthOps {
+
+  protected Utils util;
+
+  public AuthOpsImpl() {
+    util = new Utils();
+    try {
+      init();
+    } catch (AuthOpException e) {
+    }
+  }
+
+  public AuthOpsImpl(Utils u) {
+    util = u;
+    try {
+      init();
+    } catch (AuthOpException e) {
+    }
+  }
+
+  public boolean isAuthRequired(String filepath, HttpServletRequest request) throws AuthOpException {
+    // check permissions
+    List rolesRequired = rolesForPath(filepath, request);
+    return (rolesRequired != null);
+  }
+
+  public boolean isAuthorized(String filepath, HttpServletRequest request) throws AuthOpException {
+    List rolesAllowed = rolesForPath(filepath, request);
+    return isRoleAuthorized(rolesAllowed, request);
+  }
+
+  public boolean isRoleAuthorized(List roles, HttpServletRequest request) {
+    ListIterator r = roles.listIterator();
+    String s = "";
+    while (r.hasNext()) {
+      s = (String)r.next();
+      util.dprintln(5, "Testing role: "+s);
+      if (request.isUserInRole(s)) {
+        util.dprintln(5, "Role Authorized");
+        return true;
+      }
+    }
+    return false;
+  }
+
+  public abstract void init() throws AuthOpException;
+
+  public abstract List rolesForPath(String filepath, HttpServletRequest request) throws AuthOpException;
+
+}