package org.nutz.mvc.impl.processor;
import org.nutz.mvc.ActionContext;
import org.nutz.mvc.ActionInfo;
import org.nutz.mvc.NutConfig;
import org.nutz.mvc.ObjectInfo;
import org.nutz.mvc.Processor;
import org.nutz.mvc.impl.Loadings;
/**
* 抽象的Processor实现. 任何Processor实现都应该继承这个类,以获取正确的执行逻辑.
* <p/>
* @author zozoh(zozohtnt@gmail.com)
* @author wendal(wendal1985@gmail.com)
*
*/
public abstract class AbstractProcessor implements Processor {
private Processor next;
/**
* 建议覆盖这个方法,以便从NutConfig/ActionInfo获取需要的信息
*/
public void init(NutConfig config, ActionInfo ai) throws Throwable {
}
/**
* 设置下一个Processor
* <p/><b>一般情形下都不应该覆盖这个方法<b>
* @param next 下一个Processor,一般不为null
*/
public void setNext(Processor next) {
this.next = next;
}
/**
* 继续执行下一个Processor
* <p/><b>一般情形下都不应该覆盖这个方法<b>
* @param ac 执行方法的上下文
* @throws Throwable
*/
protected void doNext(ActionContext ac) throws Throwable {
if (null != next)
next.process(ac);
}
protected static <T> T evalObj(NutConfig config, ObjectInfo<T> info) {
return null == info ? null : Loadings.evalObj(config, info.getType(), info.getArgs());
}
protected void renderView(ActionContext ac) throws Throwable {
Processor p = next;
while (p != null) {
if (p instanceof ViewProcessor) {
p.process(ac);
return;
}
p = p.getNext();
}
}
public Processor getNext() {
return next;
}
}