package org.nutz.mvc.adaptor.injector;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.nutz.ioc.Ioc;
import org.nutz.lang.Strings;
import org.nutz.mvc.Mvcs;
import org.nutz.mvc.adaptor.ParamInjector;
/**
* 通过注解 '@IocObj' 可以启用这个参数注入器。
* <p>
* 如果系统挂载了 Ioc 容器，则会为该参数赋值，否则则抛出一个运行时异常
* <p>
*
* @author zozoh(zozohtnt@gmail.com)
*
* @see org.nutz.mvc.annotation.IocObj
*/
public class IocObjInjector implements ParamInjector {
private String objName;
private Class<?> objType;
public IocObjInjector(Class<?> objType, String objName) {
this.objType = objType;
this.objName = objName;
}
public Object get(ServletContext sc, HttpServletRequest req, HttpServletResponse resp, Object refer) {
Ioc ioc = Mvcs.getIoc(sc);
if (null == ioc)
throw new RuntimeException("You need define @IocBy in main module!!!");
if (Strings.isBlank(objName))
return ioc.get(objType);
return ioc.get(objType, objName);
}
}