1 /*
2 * Copyright 2009-2010 Steve Chaloner
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package be.objectify.led;
17
18 import be.objectify.led.validation.ValidationFunction;
19
20 /**
21 * Object factories are used to convert string property values into objects of an specific type.
22 *
23 * @author Steve Chaloner
24 */
25 public interface ObjectFactory<T>
26 {
27 /**
28 * Creates an object based on propertyValue. If propertyValue is null
29 * or no object can be based on it, null should be returned.
30 *
31 * @param propertyValue the value of the property
32 * @return an object (probably) based on propertyValue, or null
33 */
34 T createObject(String propertyName,
35 String propertyValue);
36
37 /**
38 * Gets the class type this factory produces objects for.
39 *
40 * @return the class type
41 */
42 Class<T> getBoundClass();
43
44 /**
45 * Validations the value for the field.
46 *
47 * @param propertyName the name of the property
48 * @param propertyValue the value from the @{link PropertyContext}
49 * @param validationFunctions functions to validate the property value
50 * @throws be.objectify.led.validation.ValidationException if the property value isn't valid
51 */
52 public void validate(String propertyName,
53 String propertyValue,
54 ValidationFunction... validationFunctions);
55 }