/*
 * JDataGridBeanApplet.java
 *
 * Created on 2006Äê11ÔÂ11ÈÕ, ÏÂÎç8:18
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package com.zfqjava.swing;

import java.awt.BorderLayout;
import java.net.URL;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JApplet;

/**
 * <code>JDataGridApplet</code> provides a standard applet based
 * on the JDataGrid component.
 * <p>
 * <code>JDataGridApplet</code> support the following parameters:
 * <table>
 *   <tr>
 *     <th>Parameter Name</th><th>Parameter Value</th><th>Parameter Description</th>
 *   </tr>
 *   <tr>
 *     <td>openUrl</td><td>url</td><td>URL load data into datagrid</td>
 *   </tr>
 *   <tr>
 *     <td>saveUrl</td><td>url</td><td>URL save data from datagrid</td>
 *   </tr>
 *   <tr>
 *     <td>saveFormat</td><td>onew of xls, xml, txt, csv, html, htm, ser</td><td>The file format to save</td>
 *   </tr>
 *   <tr>
 *     <td>saveFileName</td><td>string</td><td>The File name to save, the default is the file name of open url</td>
 *   </tr>
 *   <tr>
 *     <td>downloadPath</td><td>url</td><td>The path to download the saved file, relative to current applet webpage</td>
 *   </tr>
 *   <tr>
 *     <td>licenseUrl</td><td>url</td><td>The path to load the license data</td>
 *   </tr>
 *  </table>
 *  <b>Note:</b> 
 *  <ul>
 *  <li>The parameter value "url" is the url you want to load or save data, 
 *  You should change it for your web server.</li>
 *  <li>If you have not specified the saveFormat, it will be the format of openUrl file, 
 *  if you have not specified the openUrl, it will not execute the save operation</li>
 *  </ul>
 * @author Administrator
 */
public class JDataGridBeanApplet extends JApplet {
    private static final Logger log = Logger.getLogger(JDataGridBeanApplet.class.getName());
    private URL openUrl;
    private URL saveUrl;
    private URL downloadPath;
    private String saveFileName;
    private String saveFormat;  
    private JDataGridBean bean;
    private URL licenseUrl;    
    /** Creates a new instance of JDataGridBeanApplet */
    public JDataGridBeanApplet() {
    }
    public void init() {   
        fetchParameters();
        readLicense();        
        getContentPane().setLayout(new BorderLayout());
        bean = createDataGridBean();
        getContentPane().add(bean, BorderLayout.CENTER);
        doOpen();
    }
    
    protected JDataGridBean createDataGridBean() {
        JDataGridBean bean = new JDataGridBean();
        return bean;
    }
    private void fetchParameters() {
        String openUrlString = getParameter("openUrl");
//        openUrlString = "products/datagrid/applet/test.xls";
        
        String saveUrlString = getParameter("saveUrl");
        String saveFileNameString = getParameter("saveFileName");
        String saveFormatString =  getParameter("saveFormat");
        String downloadPathString = getParameter("downloadPath");
        String licenseUrlString = getParameter("licenseUrl");
        
        URL url = this.getDocumentBase();        
        openUrl = AppletUtils.convertToAbsolute(url, openUrlString);
        saveUrl = AppletUtils.convertToAbsolute(url, saveUrlString);
        downloadPath = AppletUtils.convertToAbsoluteImpl(url, downloadPathString);
        licenseUrl = AppletUtils.convertToAbsolute(url, licenseUrlString);
        
        saveFileName = AppletUtils.getFileName(openUrl, saveFileNameString);
        saveFormat = AppletUtils.getFileFormat(saveFileName, saveFormatString);
        
//        saveFormat = checkSaveFormat(saveFormatString);
//        System.out.println("documentBase="+this.getDocumentBase());
//        System.out.println("codeBase="+this.getCodeBase());        
//        System.out.println("openUrl="+openUrl);
    }
    private void readLicense() {
        try {
            AppletUtils.readLicense(licenseUrl);
        } catch (Exception ex) {
            if(log.isLoggable(Level.FINEST)) {
                log.log(Level.FINEST, "readLicense failed", ex);
            }
        }
    }    
    public String[][] getParameterInfo() {
        String pinfo[][] = {
            {"openUrl", "url", "URL load data into datagrid, relative to current applet webpage"},
            {"saveUrl", "url", "URL save data from datagrid, relative to current applet webpage"},
            {"saveFormat", "xls, xml, txt, csv, html, htm, ser", "The file format to save, the default is the file format of open url"},
            {"saveFileName", "string", "The File name to save, the default is the file name of open url"},
            {"downloadPath", "url", "The path to download the saved file, relative to current applet webpage"},
            {"licenseUrl", "url", "The path to load the license data"}            
        };
        return pinfo;
    }    
    private void doOpen() {
        if(this.openUrl != null) {
            bean.doOpen(new URL[] {this.openUrl});
        }
    }
    private void doSave() {
        if(!DataGridUtils.isFormatSupported(this.saveFormat)) {
            if(log.isLoggable(Level.FINER)) {
                log.log(Level.FINER, "the saveFormat is not supported: " + this.saveFormat);
            }
            return;
        }
        String fileName = AppletUtils.generateRandomFileName(this.saveFileName,this.saveFormat);
        if(fileName == null) {
            if(log.isLoggable(Level.FINER)) {
                log.log(Level.FINER, "fileName is null, cannot execute save operation");
            }
            return;
        }
	URL urlObject = this.saveUrl;
	if(urlObject == null) {
            if(log.isLoggable(Level.FINER)) {
                log.log(Level.FINER, "saveUrl is null, cannot execute save operation");
            }
            return;
        }
        URL downloadUrl = AppletUtils.getURLforBase(downloadPath, fileName);
        bean.doSaveImpl(urlObject, fileName, downloadUrl);
    }    
    public void doDownload() {
        doSave();
    }    
}