01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17: package org.apache.wicket.injection;
18:
19: import java.lang.reflect.Field;
20:
21: /**
22: * Factory object used by injector to generate values for fields of the object
23: * being injected.
24: *
25: * @author Igor Vaynberg (ivaynberg)
26: *
27: */
28: public interface IFieldValueFactory {
29: /**
30: * Returns the value the field will be set to
31: *
32: * @param field
33: * field being injected
34: * @param fieldOwner
35: * instance of object being injected
36: *
37: * @return new field value
38: */
39: Object getFieldValue(Field field, Object fieldOwner);
40:
41: /**
42: * Returns true if the factory can generate a value for the field, false
43: * otherwise.
44: *
45: * If this method returns false, getFieldValue() will not be called on this
46: * factory
47: *
48: * @param field
49: * field
50: * @return true if the factory can generate a value for the field, false
51: * otherwise
52: */
53: boolean supportsField(Field field);
54: }
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