AnnotationBeanNameGenerator.java 文件源码

/**
 * Derive a bean name from one of the annotations on the class.
 * @param annotatedDef the annotation-aware bean definition
 * @return the bean name, or {@code null} if none is found
 */
protected String determineBeanNameFromAnnotation(AnnotatedBeanDefinition annotatedDef) {
    AnnotationMetadata amd = annotatedDef.getMetadata();
    Set<String> types = amd.getAnnotationTypes();
    String beanName = null;
    for (String type : types) {
        AnnotationAttributes attributes = AnnotationConfigUtils.attributesFor(amd, type);
        if (isStereotypeWithNameValue(type, amd.getMetaAnnotationTypes(type), attributes)) {
            Object value = attributes.get("value");
            if (value instanceof String) {
                String strVal = (String) value;
                if (StringUtils.hasLength(strVal)) {
                    if (beanName != null && !strVal.equals(beanName)) {
                        throw new IllegalStateException("Stereotype annotations suggest inconsistent " +
                                "component names: '" + beanName + "' versus '" + strVal + "'");
                    }
                    beanName = strVal;
                }
            }
        }
    }
    return beanName;
}