/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package com.opensymphony.xwork2.interceptor.annotations;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * <!-- START SNIPPET: description -->
 * Marks a action method that needs to be executed before the main action method.
 * <!-- END SNIPPET: description -->
 *
 * <p><u>Annotation usage:</u></p>
 *
 * <!-- START SNIPPET: usage -->
 * The Before annotation can be applied at method level.
 *
 * <!-- END SNIPPET: usage -->
 *
 * <p><u>Annotation parameters:</u></p>
 *
 * <!-- START SNIPPET: parameters -->
 * <table class='confluenceTable' summary=''>
 * <tr>
 * <th class='confluenceTh'> Parameter </th>
 * <th class='confluenceTh'> Required </th>
 * <th class='confluenceTh'> Default </th>
 * <th class='confluenceTh'> Notes </th>
 * </tr>
 * <tr>
 * <td class='confluenceTd'>priority</td>
 * <td class='confluenceTd'>no</td>
 * <td class='confluenceTd'>10</td>
 * <td class='confluenceTd'>Priority order of method execution</td>
 * </tr>
 * </table>
 * <!-- END SNIPPET: parameters -->
 *
 * <p><u>Example code:</u></p>
 *
 * <pre>
 * <!-- START SNIPPET: example -->
 * public class SampleAction extends ActionSupport {
 *
 *  &#64;Before
 *  public void isAuthorized() throws AuthenticationException {
 *    // authorize request, throw exception if failed
 *  }
 *
 *  public String execute() {
 *     // perform secure action
 *     return SUCCESS;
 *  }
 * }
 * <!-- END SNIPPET: example -->
 * </pre>
 *
 * @author Zsolt Szasz, zsolt at lorecraft dot com
 * @author Rainer Hermanns
 */
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD})
public @interface Before {
    int priority() default 10; 
}
