package org.nutz.mvc.impl;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
import org.nutz.lang.Lang;
import org.nutz.lang.Strings;
import org.nutz.log.Log;
import org.nutz.log.Logs;
import org.nutz.mvc.ActionChain;
import org.nutz.mvc.ActionChainMaker;
import org.nutz.mvc.ActionContext;
import org.nutz.mvc.ActionInfo;
import org.nutz.mvc.Mvcs;
import org.nutz.mvc.NutConfig;
import org.nutz.mvc.UrlMapping;
import org.nutz.mvc.annotation.BlankAtException;
public class UrlMappingImpl implements UrlMapping {
private static final Log log = Logs.get();
private Map<String, ActionInvoker> map;// 这个对象有点多余,考虑换成AtMap吧!!
private MappingNode<ActionInvoker> root;
public UrlMappingImpl() {
this.map = new HashMap<String, ActionInvoker>();
this.root = new MappingNode<ActionInvoker>();
}
public void add(ActionChainMaker maker, ActionInfo ai, NutConfig config) {
//检查所有的path
String[] paths = ai.getPaths();
for (int i = 0; i < paths.length; i++) {
String path = paths[i];
if (Strings.isBlank(path))
throw new BlankAtException(ai.getModuleType(), ai.getMethod());
if (path.charAt(0) != '/')
paths[i] = '/' + path;
}
ActionChain chain = maker.eval(config, ai);
for (String path : ai.getPaths()) {
// 尝试获取，看看有没有创建过这个 URL 调用者
ActionInvoker invoker = map.get(path);
// 如果没有增加过这个 URL 的调用者，为其创建备忘记录，并加入索引
if (null == invoker) {
invoker = new ActionInvoker();
map.put(path, invoker);
root.add(path, invoker);
// 记录一下方法与 url 的映射
config.getAtMap().addMethod(path, ai.getMethod());
} else if (!ai.isForSpecialHttpMethod()) {
log.debugf("Duplicate @At mapping ? path=" + path);
}
// 将动作链，根据特殊的 HTTP 方法，保存到调用者内部
if (ai.isForSpecialHttpMethod()) {
for (String httpMethod : ai.getHttpMethods())
invoker.addChain(httpMethod, chain);
}
// 否则，将其设置为默认动作链
else {
invoker.setDefaultChain(chain);
}
}
printActionMapping(ai);
// TODO 下面个IF要不要转换到NutLoading中去呢?
// 记录一个 @At.key
if (!Strings.isBlank(ai.getPathKey()))
config.getAtMap().add(ai.getPathKey(), ai.getPaths()[0]);
}
public ActionInvoker get(ActionContext ac) {
String path = Mvcs.getRequestPath(ac.getRequest());
ActionInvoker invoker = root.get(ac, path);
if (invoker != null) {
ActionChain chain = invoker.getActionChain(ac);
if (chain != null) {
if (log.isDebugEnabled()) {
log.debugf("Found mapping for [%s] path=%s : %s", ac.getRequest().getMethod(), path, chain);
}
return invoker;
}
}
if (log.isDebugEnabled())
log.debugf("Search mapping for path=%s : NOT Action match", path);
return null;
}
protected void printActionMapping(ActionInfo ai) {
/*
* 打印基本调试信息
*/
if (log.isDebugEnabled()) {
// 打印路径
String[] paths = ai.getPaths();
StringBuilder sb = new StringBuilder();
if (null != paths && paths.length > 0) {
sb.append(" '").append(paths[0]).append("'");
for (int i = 1; i < paths.length; i++)
sb.append(", '").append(paths[i]).append("'");
} else {
throw Lang.impossible();
}
// 打印方法名
Method method = ai.getMethod();
String str;
if (null != method)
str = String.format("%-30s : %-10s",Lang.simpleMetodDesc(method), method.getReturnType().getSimpleName());
else
throw Lang.impossible();
log.debugf( "%s >> %s | @Ok(%-5s) @Fail(%-5s) | by %d Filters | (I:%s/O:%s)",
Strings.alignLeft(sb, 30, ' '),
str,
ai.getOkView(),
ai.getFailView(),
(null == ai.getFilterInfos() ? 0 : ai.getFilterInfos().length),
ai.getInputEncoding(),
ai.getOutputEncoding());
}
}
}