Spring injection by name example

SpringInjectionExample.java

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.util.Assert;

public abstract class InjectableProperty implements InitializingBean, ApplicationContextAware
{
    private String beanName;

    private ApplicationContext context;

    @Override
    public void afterPropertiesSet() throws Exception
    {
        Assert.notNull(beanName, "beanName must not be null");

        if (context.containsBean(beanName))
        {
            setBean(context.getBean(beanName));
        }
    }

    @Override
    public void setApplicationContext(ApplicationContext applicationContext)
        throws BeansException
    {
        this.context = applicationContext;
    }

    protected abstract void setBean(Object bean);
}

public class MyClass extends InjectableProperty
{
    private Object property;

    @Override
    protected void setBean(Object bean)
    {
        property = bean;
    }
}