pathmappingrulerimpl.java.svn-base

EasyJWeb是基于java技术

package com.easyjf.web.core;

import java.util.HashMap;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import com.easyjf.web.IPathMappingRuler;

/**
 * 
 * <p>
 * Title: 简单的IPathMappingRuler默认实现示例
 * </p>
 * <p>
 * Description: 实现IPathMappingRuler接口，用于处理用户请求路径
 * </p>
 * <p>
 * Copyright: Copyright (c) 2006
 * </p>
 * <p>
 * Company: www.easyjf.com
 * </p>
 * 
 * @author stef_wu、大峡
 * @version 0.7
 */
public class PathMappingRulerImpl implements IPathMappingRuler {

	private String moduleName = "";

	private Map params = null;

	private String URIpath;// 包括应用名称，不带参数的全路径.其作用用来处理绝对路径及相对路径情况。

	private String servletPath;// 不带参数的路径，通过其进行Ruler转换。

	private String command;// 解析后的命令
	
	private String urlPattern="modern";

	public PathMappingRulerImpl() {

	}

	public PathMappingRulerImpl(HttpServletRequest request) {
		String servletPath = request.getPathInfo();// 这个得到的是应用的实际路径，也即?号后面的数据
		String uriPath = request.getRequestURI();// URI是访问网址后面的全路径，也即/开始后面的部分。但不包括?后面的数据
		if (servletPath == null)
			servletPath = request.getServletPath();// 这里主要防止pathInfo为null的情况，当用户在web.xml没有作/*的配置时，将会出现

		this.URIpath = uriPath;
		this.servletPath = servletPath;
		if(servletPath.endsWith(".ejf"))urlPattern=CLASSIC_PATTERN;		
		doPathParse();
	}

	/**
	 * @deprecated 使用PathMappingRulerImpl(HttpServletRequest)代替
	 * @param path
	 */
	public PathMappingRulerImpl(String path) {
		this.moduleName = "/" + path.substring(0, path.indexOf("."));
		this.command = path.substring(path.indexOf(".") + 1);
	}

	public String getModuleName() {
		return moduleName;
	}

	public Map getParams() {
		// TODO Auto-generated method stub
		return params;
	}

	private void doPathParse() {
		String path = this.servletPath;
		if (path == null || path.equals(""))
			return;
		if (path.charAt(0) == '/')
			path = path.substring(1);// 过滤掉第一个"/"符号
		String[] s = path.split("/");
		if (s != null) {
			if (s.length > 0)// 处理模板名称
			{
				moduleName = "/" + cancelEJFTag(s[0]);
			}
			if (s.length > 1)// 处理第二个参数
			{
				s[1] = cancelEJFTag(s[1]);
				if (!isParas(s[1]))// 称判断是否是属于参数,不是则直接赋值为命令
					command = s[1];
				else {
					if (params == null)
						params = new HashMap();
					String key = s[1].substring(0, s[1].indexOf("="));
					String value = s[1].substring(s[1].indexOf("=") + 1);
					params.put(key, value);
				}
			}
			if (s.length > 2)// 处理第三个参数
			{
				if (params == null)
					params = new HashMap();
				for (int i = 2; i < s.length; i++) {
					s[i] = cancelEJFTag(s[i]);
					String v = s[i];
					String key;
					String value;
					if (isParas(v)) {
						key = s[i].substring(0, s[i].indexOf("="));
						value = s[i].substring(s[i].indexOf("=") + 1);
					} else {
						key = getDefaultParamName(i - 2);
						value = s[i];
					}
					params.put(key, value);
				}
			}
		}
		/*
		 * if (path.lastIndexOf(".ejf") > 0) { moduleName =
		 * path.substring(0, path.lastIndexOf(".ejf")); }
		 * else { path = this.URIpath; if
		 * (path.indexOf("/ejf/") == 0) path =
		 * path.substring(4); int n = path.lastIndexOf('/');
		 * if (n > 0) { para = path.substring(n + 1);
		 * moduleName = path.substring(0, n); if
		 * (para.lastIndexOf('.') > 0) para =
		 * para.substring(0, para.lastIndexOf('.')); } } if
		 * (para != null && (!para.equals(""))) {
		 * this.hasPara = true; //this.paras =
		 * para.split("_"); }
		 */
	}

	/**
	 * 取消参数中结尾的.ejf
	 * 
	 * @param s
	 * @return
	 */
	protected String cancelEJFTag(String s) {
		if (s.toLowerCase().endsWith(".ejf"))
		{
			
			return s.substring(0, s.length() - 4);
		}			
		else
			return s;
	}

	protected String getDefaultParamName(int i) {
		String ret = "id";
		// 下面添加处理默认第二、第三个参数的名称
		if (i == 1)
			ret = "page";
		if (i == 2)
			ret = "other";
		return ret;
	}

	protected boolean isParas(String s) {
		return s.indexOf("=") > 0;// 包含=号的即为参数
	}

	public String getCommand() {
		return command;
	}

	public String getServletPath() {
		return servletPath;
	}

	public void setServletPath(String servletPath) {
		this.servletPath = servletPath;
	}

	public String getURIpath() {
		return URIpath;
	}

	public void setURIpath(String ipath) {
		URIpath = ipath;
	}

	public final void setModuleName(String moduleName) {
		this.moduleName = moduleName;
	}

	public final void setCommand(String command) {
		this.command = command;
	}

	public String getUrlPattern() {
		return urlPattern;
	}

	public void setUrlPattern(String urlPattern) {
		this.urlPattern = urlPattern;
	}

}