It would be very useful if the deprecated classes, when used in the Spring beans configuration file, were flagged with a warning. Take the following for example:

<bean id="ourDataSource" class="oracle.jdbc.pool.OracleConnectionCacheImpl">
    <property name="URL" value="${dataSource.url}" />
    <property name="user" value="${dataSource.user}" />
    <property name="password" value="${dataSource.password}" />
</bean>

<bean id="simpleJdbcTemplate" class="org.springframework.jdbc.core.simple.SimpleJdbcTemplate">
    <constructor-arg index="0" ref="ourDataSource" />
</bean>

OracleConnectionCacheImpl is a deprecated class. But because the only place its appears – since the bean that uses it takes a DataSource – is in the beans configuration file, the developer is never alerted to using a deprecated class. And since it is not used until run time, he doesn't even get a compiler warning to alert him to the issue. So it would be useful for IDEA to flag this class entry with a warning like IDEA would in Java code:

class="oracle.jdbc.pool.-OracleConnectionCacheImpl-"