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Problem with getting list of names of attached files in NotesDocument

I am getting sometimes problems with creating a list of names of the attached files in a NotesDocument. The custom message looks as followed:
AttachmentDominoDAO - General problem during reading attachment from
entry 39E411CEC4AD22F3C1258821003399EF in database mail.nsf.
fileObject.getName() returns null. Files found in document
[contract.pdf]
Here is the method that I am calling:
private Attachment loadFromEntry(ViewEntry entry) {
utils.printToConsole(this.getClass().getSimpleName().toString() + " - loadFromEntry(...) unid=" + entry.getUniversalID());
Attachment attachment = new Attachment();
try{
attachment.setUnid(entry.getUniversalID());
Document doc = entry.getDocument();
if (null != doc){
attachment.setCreated(doc.getCreated().toJavaDate());
if(doc.hasItem("$FILE")){
List<String> files = doc.getAttachmentNames();
for (int j = 0; j < files.size(); ++j) {
EmbeddedObject fileObject = doc.getAttachment(files.get(j));
if(null != fileObject.getName()) {
if(null != fileObject.getName()) {
attachment.setFile(fileObject.getName());
} else {
XspOpenLogUtil.logEvent(null, "Problem with reading attachment from entry " + entry.getUniversalID() + ", fileName.getName() returns " + fileObject.getName(), Level.SEVERE, null);
}
if(null != fileObject.getName() && !utils.Right(fileObject.getName(),".").isEmpty()) {
attachment.setExtension(utils.Right(fileObject.getName(),"."));
} else {
XspOpenLogUtil.logEvent(null, "Problem with reading attachment from entry " + entry.getUniversalID() + ", extension is empty for file " + fileObject.getName(), Level.SEVERE, null);
}
attachment.setSizeHuman(FileUtils.byteCountToDisplaySize(fileObject.getFileSize()));
if(fileObject.getFileSize() > 0) {
attachment.setSize(fileObject.getFileSize());
} else {
XspOpenLogUtil.logEvent(null, "Problem with reading attachment from entry " + entry.getUniversalID() + ", fileName.size() returns " + fileObject.getFileSize(), Level.SEVERE, null);
}
if(null != doc.getAuthors() && null != doc.getAuthors().firstElement()) {
attachment.setCreator(doc.getAuthors().firstElement());
} else {
XspOpenLogUtil.logEvent(null, "Problem with reading attachment from entry " + entry.getUniversalID() + ", doc.getAuthors().firstElement() returns " + doc.getAuthors().firstElement(), Level.SEVERE, null);
}
String fieldName = "type";
if (doc.hasItem(fieldName)) {
attachment.setType(fieldName);
}
}else {
XspOpenLogUtil.logEvent(null, "AttachmentDominoDAO - General problem during reading attachment from entry " + entry.getUniversalID() + " in database " + entry.getDocument().getParentDatabase().getFileName() + ". fileObject.getName() returns null. Files found in document " + doc.getAttachmentNames().toString(), Level.SEVERE, null);
}
}
}
}
}catch (Exception e) {
XspOpenLogUtil.logEvent(e, "General problem with reading attachment from entry " + entry.getUniversalID() + " in database " + entry.getDocument().getParentDatabase().getFileName(), Level.SEVERE, null);
}
return attachment;
}
One document can only contain one file. When I check the document there is only one attachment and the attachment mentioned in the error message.
Anyone has a suggestion how to fix this issue?
Note: in 99% of the cases the error does not occur.

If getName() returns null for an attachment, try using getSource() instead. As long as it's an actual attachment (as opposed to an OLE embedded object), then getSource() always returns the original file name.

NotesDocument.getAttachment does not find attachments that were created in rich text fields. It only finds attachments that were created directly in the document itself.
We used to call an attachment that is directly acceessed through the document a "V2 attachment" because that's the way things worked in Notes V2 -- over 30 years ago. Objects created through OLE launch properties on the form can also attach objects that are directly in the document instead of inside rich text. Since OLE and V2 are both relics of the deep, dark past, almost all attachments are created inside rich text fields these days.
Attachments that are inside rich text fields are accessed through the getEmbeddedObject method of the RichTextItem class.

Seperating ArrayList items to a regular keyword group

I started Java for plugin codding in minecraft. now I'm trying to add role names as prefix and show it in chat.
ArrayList<String> userRoles = new ArrayList<String>();
if(player.hasPermission("chat.rank.admin")){
userRoles.add("[Admin]");
} if(player.hasPermission("chat.rank.vip")) {
userRoles.add("[VIP]");
}
event.setFormat(userRoles<>(1) + " " + player.getDisplayName() + "§7: " + msg);
// In this line, the expected output is "[Admin] user: msg" or both [Admin] [VIP] user: msg"
// But it gives "([Admin],[VIP]) user: msg"
// I'm sure it has a simple solution but as I said, I'm new here. thanks from now

It seems like you are trying to create a list which only stores one value.
You might want to try creating a function that get the rank name of the player outside of your PlayerChatEvent listener.
Here's a demo code:
public String getPlayerRankName(Player p){
if (p.hasPermission("chat.rank.admin"))
return "[Admin]";
else if (p.hasPermission("chat.rank.vip"))
return "[VIP]";
else
return "";
}
And in your PlayerChatEvent event listener, call this function in your chat line:
event.setFormat(getPlayerRankName(event.getPlayer()) + " " + player.getDisplayName() + "§7: " + msg);

Youtube Search Command for JDA Discord Music Bot

I've been working on a Discord bot for a few days now.
Initially only with simpler commands etc. But slowly I also devoted myself to the topic of music bot.
I also use the YouTube Data API for this and everything works so far. However, I would now like to incorporate a Youtube Search Command or build it into another (Play Command). I already have half a search command.
So far you can do $play (song title)
and the first track found will be selected.
However, I want to be able to see the first 10 search results and then choose between them.
I have already figured out how to display the search results, but now I need a little help with how to enter a command, after you have already entered another.
So you enter: $play Faded
Then a normal EmbedBuilder comes up and shows you the search results, and then you can select the desired track by entering 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10.
This is the code:
public class PlayCommand implements ServerCommand {
private final YouTube youTube;
public PlayCommand() {
YouTube temp = null;
try {
temp = new YouTube.Builder(
GoogleNetHttpTransport.newTrustedTransport(),
JacksonFactory.getDefaultInstance(),
null
)
.setApplicationName("JDA Discord Bot")
.build();
} catch (Exception e) {
e.printStackTrace();
}
youTube = temp;
}
#Override
public void performCommand(List<String> args, Member m, TextChannel channel, Message message) throws RiotApiException {
String input = String.join(" ", args.subList(1, args.size() - 1));
if (!isUrl(input)) {
String ytSearched = searchYoutube(channel, input);
if (ytSearched == null) {
channel.sendMessage("Keine Ergebnisse!").queue();
return;
}
input = ytSearched;
}
PlayerManager manager = PlayerManager.getInstance();
manager.loadAndPlay(channel, input);
manager.getGuildMusicManager(channel.getGuild()).player.setVolume(100);
}
private boolean isUrl(String input) {
try {
new URL(input);
return true;
} catch (MalformedURLException ignored) {
return false;
}
}
#Nullable
private String searchYoutube(TextChannel channel, String input) {
String youtubeKey = "AIzaSyDoQ4OInMTYth7hdlWwQSIaHuxpxxv7eJs";
try {
List<SearchResult> results = youTube.search()
.list("id,snippet")
.setQ(input)
.setMaxResults(10L)
.setType("video")
.setFields("items(id/kind,id/videoId,snippet/title,snippet/thumbnails/default/url)")
.setKey(youtubeKey)
.execute()
.getItems();
if (!results.isEmpty()) {
String videoId = results.get(0).getId().getVideoId();
/*EmbedBuilder builder = new EmbedBuilder();
builder.setTitle("Suchergebnisse");
builder.setColor(Color.RED);
builder.setDescription( "1. " + results.get(0).getSnippet().getTitle() + "\n" +
"2. " + results.get(1).getSnippet().getTitle() + "\n" +
"3. " + results.get(2).getSnippet().getTitle() + "\n" +
"4. " + results.get(3).getSnippet().getTitle() + "\n" +
"5. " + results.get(4).getSnippet().getTitle() + "\n" +
"6. " + results.get(5).getSnippet().getTitle() + "\n" +
"7. " + results.get(6).getSnippet().getTitle() + "\n" +
"8. " + results.get(7).getSnippet().getTitle() + "\n" +
"9. " + results.get(8).getSnippet().getTitle() + "\n" +
"10. " + results.get(9).getSnippet().getTitle());
channel.sendMessage(builder.build()).queue();
*/
return "https://www.youtube.com/watch?v=" + videoId;
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}

I think you are looking for an EventWaiter.
With JDA-Utilities you can achieve what you want.
You just basically wait for an event, check if it's suitable for the use case of yours (eg: is a specific event, or contains a specific text)
Check out this stackoverflow answer about EventWaiter and adding it as an EventListener.
You would want to check if the received text for example is part of the youtube search result. Also don't forget about having a time limit for accepting answers.

getInt Function Doesn't Return Anything

I am currently trying to making a custom rules plugin (for minecraft) and I am trying to see if the player has something activated which I stored in the config file. It is in the listener class (which calls the config from the main). Here is my code:
#EventHandler
public void onEvent(AsyncPlayerChatEvent e) {
Player player = e.getPlayer();
if (config.getInt("EditingLine." + player.getName().toLowerCase()) == 1) {
int line = 0;
try {
line = Integer.parseInt(e.getMessage());
} catch (Exception b) {
player.sendMessage(ChatColor.RED + "Invalid Number.");
config.set("EditingLine." + player.getName().toLowerCase(), 0);
}
if (!(line == 0)) {
config.set("EditingLine." + player.getName().toLowerCase(), 0);
config.set("EditingText." + player.getName().toLowerCase(), 1);
e.setCancelled(true);
player.sendMessage(ChatColor.GRAY + "[" + ChatColor.GOLD + "Custom Rules" + ChatColor.GRAY + "]" + ChatColor.GREEN + " Enter the text you would now like on that line.");
}
}
}
The, config.getInt() function in the if then statement currently returns nothing. This may be happening because the config in the Listener Class is actually calling a custom made config, called 'playerdata.yml' and not the actual 'config.yml'. If there is any easier way to write this script, also let me know. I'm trying to make this as simple as I can.

The answer has been solved by merging my two configuration files together.

Crawling a URL in order to extract all the other URLs in that page

I am trying to crawl URLs in order to extract other URLs inside of each URL. To do such, I read the HTML code of the page, read each line of each, match it with a pattern and then extract the needed part as shown below:
public class SimpleCrawler {
static String pattern="https://www\\.([^&]+)\\.(?:com|net|org|)/([^&]+)";
static Pattern UrlPattern = Pattern.compile (pattern);
static Matcher UrlMatcher;
public static void main(String[] args) {
try {
URL url = new URL("https://stackoverflow.com/");
BufferedReader br = new BufferedReader(new InputStreamReader(url.openStream()));
while((String line = br.readLine())!=null){
UrlMatcher= UrlPattern.matcher(line);
if(UrlMatcher.find())
{
String extractedPath = UrlMatcher.group(1);
String extractedPath2 = UrlMatcher.group(2);
System.out.println("http://www."+extractedPath+".com"+extractedPath2);
}
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
However, there some issue with it which I would like to address them:
How is it possible to make either http and www or even both of them, optional? I have encountered many cases that there are links without either or both parts, so the regex will not match them.
According to my code, I make two groups, one between http until the domain extension and the second is whatever comes after it. This, however, causes two sub-problems:
2.1 Since it is HTML codes, the rest of the HTML tags that may come after the URL will be extracted to.
2.2 In the System.out.println("http://www."+extractedPath+".com"+extractedPath2); I cannot make sure if it shows right URL (regardless of previous issues) because I do not know which domain extension it is matched with.
Last but not least, I wonder how to match both http and https as well?

How about:
try {
boolean foundMatch = subjectString.matches(
"(?imx)^\n" +
"(# Scheme\n" +
" [a-z][a-z0-9+\\-.]*:\n" +
" (# Authority & path\n" +
" //\n" +
" ([a-z0-9\\-._~%!$&'()*+,;=]+#)? # User\n" +
" ([a-z0-9\\-._~%]+ # Named host\n" +
" |\\[[a-f0-9:.]+\\] # IPv6 host\n" +
" |\\[v[a-f0-9][a-z0-9\\-._~%!$&'()*+,;=:]+\\]) # IPvFuture host\n" +
" (:[0-9]+)? # Port\n" +
" (/[a-z0-9\\-._~%!$&'()*+,;=:#]+)*/? # Path\n" +
" |# Path without authority\n" +
" (/?[a-z0-9\\-._~%!$&'()*+,;=:#]+(/[a-z0-9\\-._~%!$&'()*+,;=:#]+)*/?)?\n" +
" )\n" +
"|# Relative URL (no scheme or authority)\n" +
" ([a-z0-9\\-._~%!$&'()*+,;=#]+(/[a-z0-9\\-._~%!$&'()*+,;=:#]+)*/? # Relative path\n" +
" |(/[a-z0-9\\-._~%!$&'()*+,;=:#]+)+/?) # Absolute path\n" +
")\n" +
"# Query\n" +
"(\\?[a-z0-9\\-._~%!$&'()*+,;=:#/?]*)?\n" +
"# Fragment\n" +
"(\\#[a-z0-9\\-._~%!$&'()*+,;=:#/?]*)?\n" +
"$");
} catch (PatternSyntaxException ex) {
// Syntax error in the regular expression
}

With one library. I used HtmlCleaner. It does the job.
you can find it at:
http://htmlcleaner.sourceforge.net/javause.php
another example (not tested) with jsoup:
http://jsoup.org/cookbook/extracting-data/example-list-links
rather readable.
You can enhance it, choose < A > tags or others, HREF, etc...
or be more precise with case (HreF, HRef, ...): for exercise
import org.htmlcleaner.*;
public static Vector<String> HTML2URLS(String _source)
{
Vector<String> result=new Vector<String>();
HtmlCleaner cleaner = new HtmlCleaner();
// Principal Node
TagNode node = cleaner.clean(_source);
// All nodes
TagNode[] myNodes =node.getAllElements(true);
int s=myNodes.length;
for (int pos=0;pos<s;pos++)
{
TagNode tn=myNodes[pos];
// all attributes
Map<String,String> mss=tn.getAttributes();
// Name of tag
String name=tn.getName();
// Is there href ?
String href="";
if (mss.containsKey("href")) href=mss.get("href");
if (mss.containsKey("HREF")) href=mss.get("HREF");
if (name.equals("a")) result.add(href);
if (name.equals("A")) result.add(href);
}
return result;
}