package org.nutz.mvc.adaptor;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import org.nutz.lang.Mirror;
import org.nutz.mvc.adaptor.convertor.ArrayParamConvertor;
import org.nutz.mvc.adaptor.convertor.DateParamConvertor;
import org.nutz.mvc.adaptor.convertor.StringParamConvertor;
import org.nutz.mvc.adaptor.extractor.BaseParamExtractor;
import org.nutz.mvc.adaptor.extractor.MapParamExtractor;
public abstract class Params {
/**
* 构造参数转换器
*
* @param type
* 要转换的目标类型
* @param datefmt
* 如果目标类型是 DateTime 类似的类型，可以声明一个特殊转换格式，<br>
* 如果为 null 表示用 Times.D 函数自动猜测
*/
public static ParamConvertor makeParamConvertor(Class<?> type,
String datefmt) {
if (type.isArray())
return new ArrayParamConvertor(type.getComponentType());
Mirror<?> mirror = Mirror.me(type);
if (mirror.isDateTimeLike()) {
return new DateParamConvertor(type, datefmt);
}
return new StringParamConvertor();
}
/**
* 构造参数提取器
*/
@SuppressWarnings("unchecked")
public static ParamExtractor makeParamExtractor(HttpServletRequest req,
Object refer) {
if (refer != null && Map.class.isAssignableFrom(refer.getClass())) {
return new MapParamExtractor(req, (Map<String, Object>) refer);
}
return new BaseParamExtractor(req);
}
}