Using ExecutionContext to dynamically set bean property

[gomdolyi]

I just started to use spring batch and pretty new at this and I need help. What I'm trying to do is to use ExecutionContext to dynamically set the properties (sql query) in the bean. Something like following:

 <bean id="chunkReader" class="org.springframework.batch.item.database.JdbcCursorItemReader">
	<property name="sql" value="#{executionContext[sqlName]}" />
</bean>

The sql query and other bean properties will be pulled from the database

Is it possible?
If so where would I declare this ExecutionContext and populate it?

If not is there other way to set this dynamically on the runtime without using the .properties file?

Thanks

[Dave Syer]

If the sql query string is in backend storage somewhere you can just write a service that pulls it out and refer to it in your bean property value (e.g. #{queryService.sql}). This doesn't look like a Spring Batch requirement, so maybe I'm missing something?