com.jsqlboxdemo.dispatcher.Dispatcher.java Source code

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Here is the source code for com.jsqlboxdemo.dispatcher.Dispatcher.java

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/*
 * Copyright 2016 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by
 * applicable law or agreed to in writing, software distributed under the
 * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
 * OF ANY KIND, either express or implied. See the License for the specific
 * language governing permissions and limitations under the License.
 */
package com.jsqlboxdemo.dispatcher;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.PageContext;

import org.apache.commons.lang.StringUtils;

import com.github.drinkjava2.jbeanbox.BeanBox;
import com.github.drinkjava2.jwebbox.WebBox;

/**
 * This is a Dispatcher servlet, use jWebBox as controller
 * 
 * @author Yong Zhu
 * @since 1.7.0
 */
@SuppressWarnings("all")
public class Dispatcher {
    public static void dispach(PageContext pageContext) throws Exception {
        HttpServletRequest request = (HttpServletRequest) pageContext.getRequest();
        String uri = StringUtils.substringBefore(request.getRequestURI(), ".");
        String contextPath = request.getContextPath();

        if (!StringUtils.isEmpty(contextPath))
            uri = StringUtils.substringAfter(uri, contextPath);
        if (StringUtils.isEmpty(uri) || "/".equals(uri))
            uri = "/home";

        String[] paths = StringUtils.split(uri, "/");
        String[] pathParams;
        String resource = null;
        String operation = null;

        if (paths.length >= 2) {// /team/add/100...
            resource = paths[0];
            operation = paths[1];
            pathParams = new String[paths.length - 2];
            for (int i = 2; i < paths.length; i++)
                pathParams[i - 2] = paths[i];
        } else { // /home_default
            resource = paths[0];
            pathParams = new String[0];
        }

        if (operation == null)
            operation = "default";
        StringBuilder controller = new StringBuilder("com.jsqlboxdemo.controller.").append(resource).append("$")
                .append(resource).append("_").append(operation);
        if ("POST".equals(request.getMethod()))
            controller.append("_post");

        WebBox box;
        try {
            Class boxClass = Class.forName(controller.toString());
            box = BeanBox.getPrototypeBean(boxClass);
        } catch (Exception e) {
            throw new ClassNotFoundException("There is no WebBox classs '" + controller + "' found.");
        }
        request.setAttribute("pathParams", pathParams);
        box.show(pageContext);
    }

}