initialize dependency object dynamiclly in dependency injection? - spring-mvc

Question

To initialize dependency object we put an entry of bean in '/WEB-INF/springmvc-servlet.xml' as:
<bean id="carManager" class="springmvc.service.CarManager">
<property name="carList">
<list>
<ref bean="car1"/>
<ref bean="car2"/>
</list>
</property>
</bean>
for reference bean "car1" and car2" we have entry is:
<bean id="car1" class="springmvc.model.Car">
<property name="id" value="1"/>
<property name="brand" ref="brand1"/>
<property name="model" value="SL 500"/>
<property name="price" value="40000"/>
</bean>
<bean id="car2" class="springmvc.model.Car">
<property name="id" value="2"/>
<property name="brand" ref="brand2"/>
<property name="model" value="607"/>
<property name="price" value="35000"/>
</bean>
so my question is can we prepare "car1" and "car2" bean dynamically. for example in "car1" bean i want car list whoes value is above 40000 so for that i have to take data from DB so how can i call my service or DB query to prepare such bean is it possible?

Answer 1

You can implement BeanDefinitionParser and override appropriate method in it.
and use
BeanDefinitionBuilder messageProcessorBuilder = BeanDefinitionBuilder.genericBeanDefinition(MessagingPostProcessor.class);
messageProcessorBuilder.addConstructorArgValue(StringUtils.split(packageNames, ","));
registry.registerBeanDefinition(MessagingPostProcessor.class.getName(), messageProcessorBuilder.getBeanDefinition());