Spring static Bean loader to load beans outside the Servlet or Sprign context

BeanLoader.java

import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Service;

@Service
public final class BeanLoader implements ApplicationContextAware
{
    private static BeanLoader instance;

    private ApplicationContext applicationContext;

    private BeanLoader()
    {
    }

    public static BeanLoader getInstance()
    {
        if (instance == null)
        {
            instance = new BeanLoader();
        }
        return instance;
    }

    public <T> T getBean(final Class<T> beanClass)
    {
        if (applicationContext == null)
        {
            throw new IllegalStateException("ApplicationContext has not been set. BeanLoader must be configured in Spring'sapplication context in order to be used.");
        }
        return BeanFactoryUtils.beanOfType(applicationContext, beanClass);
    }

    @SuppressWarnings("unchecked")
    public <T> T getBean(final String beanName, final Class<T> expectedClass)
    {
        if (applicationContext == null)
        {
            throw new IllegalStateException("ApplicationContext has not been set. BeanLoader must be configured in Spring'sapplication context in order to be used.");
        }
        return (T) applicationContext.getBean(beanName);
    }

    @Override
    public void setApplicationContext(final ApplicationContext applicationContext)
    {
        this.applicationContext = applicationContext;
    }
}