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   * Copyright (c) 2008-2010 Oracle and/or its affiliates. All rights reserved.
   * The contents of this file are subject to the terms of either the GNU
   * General Public License Version 2 only ("GPL") or the Common Development
   * and Distribution License("CDDL") (collectively, the "License").  You
   * may not use this file except in compliance with the License.  You can
  * obtain a copy of the License at
  * or packager/legal/LICENSE.txt.  See the License for the specific
  * language governing permissions and limitations under the License.
  * When distributing the software, include this License Header Notice in each
  * file and include the License file at packager/legal/LICENSE.txt.
  * GPL Classpath Exception:
  * Oracle designates this particular file as subject to the "Classpath"
  * exception as provided by Oracle in the GPL Version 2 section of the License
  * file that accompanied this code.
  * Modifications:
  * If applicable, add the following below the License Header, with the fields
  * enclosed by brackets [] replaced by your own identifying information:
  * "Portions Copyright [year] [name of copyright owner]"
  * Contributor(s):
  * If you wish your version of this file to be governed by only the CDDL or
  * only the GPL Version 2, indicate your decision by adding "[Contributor]
  * elects to include this software in this distribution under the [CDDL or GPL
  * Version 2] license."  If you don't indicate a single choice of license, a
  * recipient has the option to distribute your version of this file under
  * either the CDDL, the GPL Version 2 or to extend the choice of license to
  * its licensees as provided above.  However, if you add GPL Version 2 code
  * and therefore, elected the GPL Version 2 license, then the option applies
  * only if the new code is made subject to such option by the copyright
  * holder.
 package javax.servlet.annotation;
This annotation is used within the ServletSecurity annotation to represent the security constraints to be applied to all HTTP protocol methods for which a corresponding HttpMethodConstraint element does NOT occur within the ServletSecurity annotation.

Servlet 3.0
 public @interface HttpConstraint {

The default authorization semantic. This value is insignificant when rolesAllowed returns a non-empty array, and should not be specified when a non-empty array is specified for rolesAllowed.

the EmptyRoleSemantic to be applied when rolesAllowed returns an empty (that is, zero-length) array.
     EmptyRoleSemantic value() default .;

The data protection requirements (i.e., whether or not SSL/TLS is required) that must be satisfied by the connections on which requests arrive.

the TransportGuarantee indicating the data protection that must be provided by the connection.
The names of the authorized roles. Duplicate role names appearing in rolesAllowed are insignificant and may be discarded during runtime processing of the annotation. The String "*" has no special meaning as a role name (should it occur in rolesAllowed).

an array of zero or more role names. When the array contains zero elements, its meaning depends on the EmptyRoleSemantic returned by the value method. If value returns DENY, and rolesAllowed returns a zero length array, access is to be denied independent of authentication state and identity. Conversely, if value returns PERMIT, it indicates that access is to be allowed independent of authentication state and identity. When the array contains the names of one or more roles, it indicates that access is contingent on membership in at least one of the named roles (independent of the EmptyRoleSemantic returned by the value method).
    String[] rolesAllowed() default {};
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