main/java/FolderModel.java

/*
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

import javax.mail.*;
import java.util.Date;
import javax.swing.table.AbstractTableModel;

/**
 * Maps the messages in a Folder to the Swing's Table Model
 *
 * @author  Christopher Cotton
 * @author  Bill Shannon
 */

public class FolderModel extends AbstractTableModel {

    Folder  folder;
    Message[]   messages;

    String[]    columnNames = { "Date", "From", "Subject"};
    Class[] columnTypes = { String.class, String.class, String.class };

    public void setFolder(Folder what) throws MessagingException {
    if (what != null) {

        // opened if needed
        if (!what.isOpen()) {
        what.open(Folder.READ_WRITE);
        }

        // get the messages
        messages = what.getMessages();
        cached = new String[messages.length][];
    } else {
        messages = null;
        cached = null;
    }
    // close previous folder and switch to new folder
    if (folder != null)
        folder.close(true);
    folder = what;
    fireTableDataChanged();
    }

    public Message getMessage(int which) {
    return messages[which];
    }

    //---------------------
    // Implementation of the TableModel methods
    //---------------------

    public String getColumnName(int column) {
    return columnNames[column];
    }

    public Class getColumnClass(int column) {
    return columnTypes[column];
    }


    public int getColumnCount() {
    return columnNames.length;
    }

    public int getRowCount() {
    if (messages == null)
        return 0;

    return messages.length;
    }

    public Object getValueAt(int aRow, int aColumn) {
    switch(aColumn) {
    case 0: // date
    case 1: // From     String[] what = getCachedData(aRow);
    case 2: // Subject
        String[] what = getCachedData(aRow);
        if (what != null) {
        return what[aColumn];
        } else {
        return "";
        }

    default:
        return "";
    }
    }

    protected static String[][] cached;

    protected String[] getCachedData(int row) {
    if (cached[row] == null) {
        try{
        Message m = messages[row];

        String[] theData = new String[4];

        // Date
        Date date = m.getSentDate();
        if (date == null) {
            theData[0] = "Unknown";
        } else {
            theData[0] = date.toString();
        }

        // From
        Address[] adds = m.getFrom();
        if (adds != null && adds.length != 0) {
            theData[1] = adds[0].toString();
        } else {
            theData[1] = "";
        }

        // Subject
        String subject = m.getSubject();
        if (subject != null) {
            theData[2] = subject;
        } else {
            theData[2] = "(No Subject)";
        }

        cached[row] = theData;
        }
        catch (MessagingException e) {
        e.printStackTrace();
        }
    }

    return cached[row];
    }
}