emailclient.java

BEA WebLogic Server 8.1大全 = BEA webLogic server 8.1 unleashed (美) Mark Artiges等著 袁毅 ... [等] 译 eng

/* 
 * WebLogic Server Unleashed
 * 
 */


package com.wlsunleashed.xml.sax;

import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import java.util.Vector;

import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.border.LineBorder;

import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.XMLReaderFactory;

import com.wlsunleashed.xml.sax.email.EMail;
import com.wlsunleashed.xml.sax.email.EMailAddress;


/**
 * This class Creates a *simple* e-mail parsing client.
 * 
 * @version 1.0
 */
public class EMailClient extends JFrame {
    /** The default parser class */
    private String DEFAULT_PARSER = 
        "weblogic.apache.xerces.parsers.SAXParser";

    /** DOCUMENT ME! */
    private String xmlFile = "";

    /**
     * Constructor for EMailClient.
     * 
     * @param title The title of the application
     * @param xmlFile The xml file to be used
     * 
     * @throws SAXException Thrown when any SAX Parsing exception occurs
     * @throws IOException Thrown when any IO exception occurs
     */
    public EMailClient(String title, String xmlFile)
                throws SAXException, IOException {
        super(title);
        this.xmlFile = xmlFile;

        JPanel mainPanel = new JPanel();
        populatePanel(mainPanel);
        getContentPane().setLayout(new FlowLayout());
        getContentPane().add(mainPanel);
        setSize(400, 300);
    }

    /**
     * The entry point to the application
     * 
     * @param args The arguments to the invocation
     */
    public static void main(String[] args) {
        if (args.length != 1) {
            System.out.println("Usage EMailClient <EMail document>.xml");

            System.exit(1);	
        }

        try {
            EMailClient anEmailClient = new EMailClient(
                                                "Email Client (Using SAX Parser)", 
                                                args[0]);
            anEmailClient.setVisible(true);
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    /**
     * Populates the header panel with the contents of the EMail.
     * 
     * @param headerPanel JPanel to be populated
     * @param anEmail EMail : The email object
     */
    private void populatePanel(JPanel headerPanel, EMail anEmail) {
        Vector toAddresses = anEmail.getToAddresses();
        Vector ccAddresses = anEmail.getCcAddresses();
        int numLines = 5 + toAddresses.size() + ccAddresses.size();
        GridBagConstraints gbc = new GridBagConstraints();
        GridBagLayout gbl = new GridBagLayout();
        gbl.columnWidths = new int[] { 30, 70 };
        gbl.rowHeights = new int[numLines];

        for (int i = 0; i < numLines; i++) {
            gbl.rowHeights[i] = 1;
        }

        headerPanel.setLayout(gbl);
        gbc.anchor = GridBagConstraints.NORTHWEST;


        // From address
        gbc.gridy = 0;
        gbc.gridx = 0;
        headerPanel.add(new JLabel("From:"), gbc);
        gbc.gridx = 1;
        headerPanel.add(new JLabel(anEmail.getFromAddress().getDisplayableId()), 
                        gbc);


        // To addresses
        gbc.gridy++;
        gbc.gridx = 0;
        headerPanel.add(new JLabel("To:"), gbc);
        gbc.gridy--;

        for (int i = 0; i < toAddresses.size(); i++) {
            EMailAddress anAddress = (EMailAddress) toAddresses.get(i);
            gbc.gridy++;
            gbc.gridx = 1;
            headerPanel.add(new JLabel(anAddress.getDisplayableId()), gbc);
        }

        // CC Addresses
        if (ccAddresses.size() > 0) {
            gbc.gridy++;
            gbc.gridx = 0;
            headerPanel.add(new JLabel("Cc:"), gbc);
            gbc.gridy--;

            for (int i = 0; i < ccAddresses.size(); i++) {
                EMailAddress anAddress = (EMailAddress) ccAddresses.get(i);
                gbc.gridy++;
                gbc.gridx = 1;
                headerPanel.add(new JLabel(anAddress.getDisplayableId()), gbc);
            }
        }


        // Options : Read Receipt		
        gbc.gridy++;
        gbc.gridx = 0;
        headerPanel.add(new JLabel("Read Receipt "), gbc);

        JCheckBox aCheckBox = new JCheckBox("");
        aCheckBox.setEnabled(false);

        if (anEmail.getOptions().isReadReceipt()) {
            aCheckBox.setSelected(true);
        } else {
            aCheckBox.setSelected(false);
        }

        gbc.gridx = 1;
        headerPanel.add(aCheckBox, gbc);


        // Options : Importance
        gbc.gridy++;
        gbc.gridx = 0;
        headerPanel.add(new JLabel("Importance: "), gbc);
        gbc.gridx = 1;
        headerPanel.add(new JLabel(anEmail.getOptions().getImportance()), gbc);


        // Subject 
        gbc.gridy++;
        gbc.gridx = 0;
        headerPanel.add(new JLabel("Subject: "), gbc);
        gbc.gridx = 1;
        headerPanel.add(new JLabel(anEmail.getSubject()), gbc);


        // Body of the EMAil
        gbc.gridy += 3;
        gbc.gridx = 0;
        headerPanel.add(new JLabel("Body: "), gbc);
        gbc.gridx = 1;

        JTextArea textArea = new JTextArea(anEmail.getBody(), 5, 25);
        textArea.setLineWrap(true);
        textArea.setEditable(false);
        textArea.setBorder(new LineBorder(Color.black));

        JScrollPane aScrollPane = new JScrollPane(textArea);
        aScrollPane.setVerticalScrollBarPolicy(
                JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
        aScrollPane.setHorizontalScrollBarPolicy(
                JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
        headerPanel.add(aScrollPane, gbc);

        gbc.gridy++;
        gbc.gridx = 0;

        JButton aButton = new JButton("Close");
        aButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent event) {
                System.exit(0);
            }
        });

        headerPanel.add(aButton, gbc);
    }

    /**
     * Method populatePanel Populates the created panel
     * 
     * @param headerPanel The header panel
     * 
     * @throws SAXException Thrown when any SAX exception occurs
     * @throws IOException Thrown when any IO Exception occurs
     */
    private void populatePanel(JPanel headerPanel)
                        throws SAXException, IOException {
        // Create an XML Reader 
        XMLReader aReader = XMLReaderFactory.createXMLReader(DEFAULT_PARSER);
        aReader.setContentHandler(new EMailContentHandler());
        aReader.setErrorHandler(new EMailErrorHandler());

        // Parse the input source
        InputSource inputSource = new InputSource(xmlFile);
        aReader.parse(inputSource);

        EMail anEmail = ((EMailContentHandler) aReader.getContentHandler()).getEMail();
        populatePanel(headerPanel, anEmail);
    }
}