FrameworkBeanFactory.java 文件源码

/**
 * Creates a bean factory.
 *
 * @param parentContext Parent application context, if any. When specified, any placeholder
 *            configurers found in the parent context will be registered in this bean factory.
 * @param parentBeanFactory The parent bean factory, if any.
 */
public FrameworkBeanFactory(ApplicationContext parentContext, BeanFactory parentBeanFactory) {
    super(parentBeanFactory);
    int i = 0;

    if (parentContext != null) {
        for (PlaceholderConfigurerSupport configurer : parentContext
                .getBeansOfType(PlaceholderConfigurerSupport.class, false, false).values()) {
            registerSingleton("_placeholderconfigurer" + ++i, configurer);
        }
    }
}