ServletSpringContext.java

package org.atomhopper.servlet;

import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.web.context.support.WebApplicationContextUtils;

import javax.servlet.ServletContext;

/*
 * @author John Hopper
 */
public class ServletSpringContext implements ApplicationContextAware, ApplicationContextAdapter {

    private ApplicationContext applicationContext;

    @Override
    public synchronized void setApplicationContext(ApplicationContext ac) {
        if (applicationContext == null) {
            applicationContext = ac;
        }
    }

    @Override
    public synchronized void usingServletContext(ServletContext context) {
        if (applicationContext == null) {
            applicationContext = WebApplicationContextUtils.getRequiredWebApplicationContext(context);
        }
    }

    @Override
    public <T> T fromContext(Class<T> classToCastTo) {
        return applicationContext.getBean(classToCastTo);
    }

    @Override
    public <T> T fromContext(String refName, Class<T> classToCastTo) {
        return applicationContext.getBean(refName, classToCastTo);
    }
}