JavaMail 1.6.2 Source Code Files

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 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * or LICENSE.txt.  See the License for the specific
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 * file and include the License file at LICENSE.txt.
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 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 * Modifications:
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package com.sun.mail.imap.protocol;

import java.util.List;
import java.util.ArrayList;

 * This class holds the 'start' and 'end' for a range of messages.
public class MessageSet {

    public int start;
    public int end;

    public MessageSet() { }

    public MessageSet(int start, int end) {
	this.start = start;
	this.end = end;

     * Count the total number of elements in a MessageSet
     * @return	how many messages in this MessageSet
    public int size() {
	return end - start + 1;

     * Convert an array of integers into an array of MessageSets
     * @param	msgs	the messages
     * @return		array of MessageSet objects
    public static MessageSet[] createMessageSets(int[] msgs) {
	List<MessageSet> v = new ArrayList<>();
	int i,j;

	for (i=0; i < msgs.length; i++) {
	    MessageSet ms = new MessageSet();
	    ms.start = msgs[i];

	    // Look for contiguous elements
	    for (j=i+1; j < msgs.length; j++) {
		if (msgs[j] != msgs[j-1] +1)
	    ms.end = msgs[j-1];
	    i = j-1; // i gets incremented @ top of the loop
	return v.toArray(new MessageSet[v.size()]);	

     * Convert an array of MessageSets into an IMAP sequence range
     * @param	msgsets	the MessageSets
     * @return		IMAP sequence string
    public static String toString(MessageSet[] msgsets) {
	if (msgsets == null || msgsets.length == 0) // Empty msgset
	    return null; 

	int i = 0;  // msgset index
	StringBuilder s = new StringBuilder();
	int size = msgsets.length;
	int start, end;

	for (;;) {
	    start = msgsets[i].start;
	    end = msgsets[i].end;

	    if (end > start)
	    else // end == start means only one element
	    i++; // Next MessageSet
	    if (i >= size) // No more MessageSets
	return s.toString();

     * Count the total number of elements in an array of MessageSets
    public static int size(MessageSet[] msgsets) {
	int count = 0;

	if (msgsets == null) // Null msgset
	    return 0; 

	for (int i=0; i < msgsets.length; i++)
	    count += msgsets[i].size();
	return count;



Or download all of them as a single archive file:

File name: javax.mail-1.6.2-sources.jar
File size: 851487 bytes
Release date: 2018-08-29


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