jpublishviewhandler.java

Sequoia ERP是一个真正的企业级开源ERP解决方案。它提供的模块包括：电子商务应用(e-commerce), POS系统(point of sales),知识管理,存货与仓库管理

/*
 * $Id: JPublishViewHandler.java 5462 2005-08-05 18:35:48Z jonesde $
 *
 * Copyright (c) 2003 The Open For Business Project - www.ofbiz.org
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT
 * OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */
package org.ofbiz.webapp.view;

import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.Writer;
import javax.servlet.ServletContext;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.ofbiz.base.util.GeneralException;
import org.ofbiz.base.util.UtilJ2eeCompat;

/**
 * Handles JPublish type view rendering
 *
 * @author     <a href="mailto:[e-mail]">Andy Zeneski</a>
 * @version    $Rev: 5462 $
 * @since      2.1
 */
public class JPublishViewHandler implements ViewHandler {

    public static final String module = JPublishViewHandler.class.getName();
    
    protected ServletContext servletContext = null;
    protected JPublishWrapper wrapper = null;

    /**
     * @see org.ofbiz.webapp.view.ViewHandler#init(javax.servlet.ServletContext)
     */
    public void init(ServletContext context) throws ViewHandlerException {
        this.servletContext = context;
        this.wrapper = (JPublishWrapper) context.getAttribute("jpublishWrapper");
        if (this.wrapper == null) {
            this.wrapper = new JPublishWrapper(servletContext);            
        }

        // make sure it loaded
        if (this.wrapper == null)
            throw new ViewHandlerException("JPublishWrapper not created");
    }

    /**
     * @see org.ofbiz.webapp.view.ViewHandler#render(java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
     */
    public void render(String name, String page, String info, String contentType, String encoding, HttpServletRequest request, HttpServletResponse response) throws ViewHandlerException {
        Writer writer = null;
        try {
        	// use UtilJ2eeCompat to get this setup properly
        	boolean useOutputStreamNotWriter = false;
        	if (this.servletContext != null) {
        		useOutputStreamNotWriter = UtilJ2eeCompat.useOutputStreamNotWriter(this.servletContext);
        	}
        	if (useOutputStreamNotWriter) {
        		ServletOutputStream ros = response.getOutputStream();
                writer = new OutputStreamWriter(ros, "UTF-8");
        	} else {
                writer = response.getWriter();
        	}
            wrapper.render(page, request, response, writer, null, true);
        } catch (IOException e) {
            throw new ViewHandlerException("Problems with the response writer/output stream", e);
        } catch (GeneralException e) {
            throw new ViewHandlerException("Cannot render page", e);
        }
    }
}