1 // Copyright 2008 Thiago H. de Paula Figueiredo
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 package br.com.arsmachina.tapestrycrud.encoder;
16
17 import org.apache.tapestry5.EventContext;
18
19 /**
20 * Interface that encapsulates the Tapestry 5 activation context logic for objects of a given type.
21 *
22 * @author Thiago H. de Paula Figueiredo
23 * @param <T> the entity class related to this encoder.
24 */
25 public interface ActivationContextEncoder<T> {
26
27 /**
28 * Given an object, returns its activation context value.
29 *
30 * @param object an {@link EventContext}.
31 * @return an {@link Object}. It must be null if <code>object</code> is null.
32 */
33 public Object toActivationContext(T object);
34
35 /**
36 * Given an activation context value, returns its object.
37 *
38 * @param value an {@link EventContext}.
39 * @return a {@link T}.
40 */
41 public T toObject(EventContext value);
42
43 }