01: /*
02: * Copyright 2002-2007 the original author or authors.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
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:
17: package org.springframework.beans.factory.annotation;
18:
19: import org.springframework.beans.factory.wiring.BeanWiringInfo;
20: import org.springframework.beans.factory.wiring.BeanWiringInfoResolver;
21: import org.springframework.util.Assert;
22: import org.springframework.util.ClassUtils;
23:
24: /**
25: * {@link org.springframework.beans.factory.wiring.BeanWiringInfoResolver} that
26: * uses the Configurable annotation to identify which classes need autowiring.
27: * The bean name to look up will be taken from the {@link Configurable} annotation
28: * if specified; otherwise the default will be the fully-qualified name of the
29: * class being configured.
30: *
31: * @author Rod Johnson
32: * @author Juergen Hoeller
33: * @since 2.0
34: * @see Configurable
35: * @see org.springframework.beans.factory.wiring.ClassNameBeanWiringInfoResolver
36: */
37: public class AnnotationBeanWiringInfoResolver implements
38: BeanWiringInfoResolver {
39:
40: public BeanWiringInfo resolveWiringInfo(Object beanInstance) {
41: Assert.notNull(beanInstance, "Bean instance must not be null");
42: Configurable annotation = beanInstance.getClass()
43: .getAnnotation(Configurable.class);
44: return (annotation != null ? buildWiringInfo(beanInstance,
45: annotation) : null);
46: }
47:
48: /**
49: * Build the BeanWiringInfo for the given Configurable annotation.
50: * @param beanInstance the bean instance
51: * @param annotation the Configurable annotation found on the bean class
52: * @return the resolved BeanWiringInfo
53: */
54: protected BeanWiringInfo buildWiringInfo(Object beanInstance,
55: Configurable annotation) {
56: if (!Autowire.NO.equals(annotation.autowire())) {
57: return new BeanWiringInfo(annotation.autowire().value(),
58: annotation.dependencyCheck());
59: } else {
60: if (!"".equals(annotation.value())) {
61: // explicitly specified bean name
62: return new BeanWiringInfo(annotation.value(), false);
63: } else {
64: // default bean name
65: return new BeanWiringInfo(
66: getDefaultBeanName(beanInstance), true);
67: }
68: }
69: }
70:
71: /**
72: * Determine the default bean name for the specified bean instance.
73: * <p>The default implementation returns the superclass name for a CGLIB
74: * proxy and the name of the plain bean class else.
75: * @param beanInstance the bean instance to build a default name for
76: * @return the default bean name to use
77: * @see org.springframework.util.ClassUtils#getUserClass(Class)
78: */
79: protected String getDefaultBeanName(Object beanInstance) {
80: return ClassUtils.getUserClass(beanInstance).getName();
81: }
82:
83: }
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