1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.myfaces.application.viewstate;
20
21 import javax.faces.context.FacesContext;
22
23 /**
24 *
25 */
26 abstract class KeyFactory<K>
27 {
28
29 /**
30 * Generates a unique key per session
31 */
32 public abstract K generateKey(FacesContext facesContext);
33
34 /**
35 * Encode a Key into a value that will be used as view state session token
36 */
37 public abstract String encode(K key);
38
39 /**
40 * Decode a view state session token into a key
41 */
42 public abstract K decode(String value);
43
44 }