Proper way to inject parent class dependencies with Spring annotations
inversion-of-control, java, spring, spring-ioc
Solution
Not necessarily the answer you were looking for, but I would do this with an intermediary super class.
public abstract class AbstractDao extends NamedParameterJdbcDaoSupport {
@Autowired
public void setDataSource(DataSource dataSource) {
super.setDataSource(dataSource);
}
}
@Component
public class Dao extends AbstractDao {
}
Problem
I have following code - Dao.java ``` @Component public class Dao extends NamedParameterJdbcDaoSupport { } ``` dbContext.xml ``` <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="${db.driver}" /> <property name="url" value="${db.jdbc.url}" /> <property name="username" value="${db.user}" /> <property name="password" value="${db.password}" /> </bean> ``` applicationContext.xml ``` <context:component-scan base-package="com.kshitiz" /> ``` The problem is that `NamedParameterJdbcDaoSupport` needs data source in order to work. Since this is a property of the super class and not my own class the only way I could think of to make it work is - ``` @Component public class Dao extends NamedParameterJdbcDaoSupport { @Autowired public void setDataSource(DataSource dataSource) { super.setDataSource(dataSource); } } ``` This is pretty ugly. Can I specify that I want to autowire all the properties of my bean? Something like - ``` @Component(default-autowire="byType") public class Dao extends NamedParameterJdbcDaoSupport { } ``` Is this possible in Spring? Alternatively what is the most elegant way to inject super class dependencies? Edit: I already know this can be done using XML which I am presently using. I'd like to know the best that can be done using annotations only.