AbstractBeanFactory.java 文件源码

/**
 * Evaluate the given String as contained in a bean definition,
 * potentially resolving it as an expression.
 * @param value the value to check
 * @param beanDefinition the bean definition that the value comes from
 * @return the resolved value
 * @see #setBeanExpressionResolver
 */
protected Object evaluateBeanDefinitionString(String value, BeanDefinition beanDefinition) {
    if (this.beanExpressionResolver == null) {
        return value;
    }
    Scope scope = (beanDefinition != null ? getRegisteredScope(beanDefinition.getScope()) : null);
    return this.beanExpressionResolver.evaluate(value, new BeanExpressionContext(this, scope));
}