I need your help about method for 'Seperating Keypad'
Hi~ I'm a logic user.
I used to be a PC version logic platinum user.
And, I'm moving to Mac OS.
So, I bought Logic Express.
I just want to set up 'my style keycommand'.
Especially, seperating numbers on keyboard and keypad.
(For example, number 1 on keyboard to 'Screen01' and number 1 on keypad to 'Rewind'.)
My equipments are is Macbook air and USB keyboard(A1243-109key)
I bought this extra keyboard for more convenient use at home.
and, have done all through the Manual.
Preference < Keycommand < option < preset < US with numeric Keypad selecting (if only 109 key) < Learn by key position & Pressing number 1 on keypad.
But, doesn't work.
Only with message like 'already assigned to the Screen01, will you really change?'
In short, keypad can't be seperated.
Can you help me?
1. Do I have to adjust keyboard to Mac before loading Logic?
2. Is the seperating impossible in case of Macbook + normal Keyboard?
3. Can you guess what is the problem?
I need your cooperation~
Thank you~
Please post this in Portal forum. This is Reports forum
Similar Messages
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Philipp Weckerle,I need your help~~about extensions for dreamweaver
I have installed oc4j and oracle extensions for Macromedia dreamweaver.http://localhost:23791/portalTempalte/portaTemplate can been seen,but there are something error with connection to the DB.
the portalTemplate.xml like this:
<?xml version = '1.0' standalone = 'yes'?>
<portalTemplate>
<username>portal</username>
<password>Qvj9I0Kb</password>
<host>ocsinfra.taiji.com.cn</host>
<port>1521</port>
<sid>asdb</sid>
</portalTemplate>
what's wrong with it ? Or something eles i will do ?
Can you send me a mail if you are not busy ? Thanks a lot.
shang.<[email protected]>Please post this in Portal forum. This is Reports forum
-
Beginner in java and need your help about DES
hello,
I m a new guy in java programming and learn from many books.I m making a website and portal right now and dying need your help about DES.my portal (using java) requires somebody to make a login name and a password.I m done with the server and client things and rite now stuck with this "DES" stuff.
so I make some conditions and algorithm below..
1. when a user login,the password is encrypted.at this point,cleartext(id) and encryption (M,N) are involve.
2. then the key is changed based on algorithm.
3.the key changed by key(id) is received and the original text should be encrypted.
the algorithm
1. the original text x1.x2.x3.x4.x5.x6.x7.x8 (64 bits)
2. encypt the password
a. Each character is changed into an int type by the ASCII code, and let the 1st bit be an odd number parity bit.
b.The 1st bit of the 1st character in (IP) is set to '1', and the 8th bit of the 8th character as '64'.
c.the rest (IP) is like this
1 2 3 4 5 6 7 8
0 # 58 50 42 34 26 18 10 2
8 # 60 52 44 36 28 20 12 4
16 # 62 54 46 38 30 22 14 6
24 # 64 46 48 40 32 24 16 8
32 # 57 49 41 33 25 17 9 1
40 # 59 51 43 35 27 19 11 3
48 # 61 53 45 37 29 21 13 5
56 # 63 55 47 39 31 23 15 7
d. and lastly,from above,,it should be done like this
1 2 3 4 5 6 7
0 # 40 8 48 16 56 24 64 32
8 # 39 7 27 15 55 23 53 31
16 # 38 6 26 14 54 22 52 30
24 # 37 5 25 13 53 21 51 29
32 # 36 4 24 12 52 20 50 28
40 # 35 3 23 11 51 19 49 27
48 # 34 2 21 10 50 18 48 26
56 # 33 1 20 9 49 17 47 25
e. key y1,y2,y3,y4,y5,y6,y7,y8 (64bit)
f. generate the key based on ID
a. Each character is changed into an int type by the ASCII code, and let the 1st bit be an even number parity bit.
b.the process is repeat again.
anybody has an idea to help me with the sample program?
thanks in advance...just ask about a simple program how to receive a
password from somebody and change it to a key..and
then confirm it with DES.Once again I have a problem understanding what you are asking.
Are you trying to use the password as a key to encrypt some 'standard thing' and place this encrypted value in a database? If so then look in the JCE for 'password based encryption' such as PBEWithMD5AndDes. This seems back to front to me but I can see nothing wrong with the approach since the 'standard thing' you would encrypt is in effect a key. If this is for a commercial application then I would find a security expert to evaluate your proposal!
In my experience it is more normal to encrypt the user's password with DES and store the result in the database. To do this just look in the JCE for DES encryption and consider using DES with CBC and PKCS5 padding. Also, consider encrypting the concatenation of the user's 'user name' with the password as this will (almost certainly) avoid having two encrypted values in the database that are the same even if two users have the same password.
For both of these you might consider using Base64 or Hex to turn you encrpted bytes into ASCII characters before trying to store them in your DB. -
Need some help with method for calendar
Hi all,
I've got to design a claendar for college but I'm not allowed use any one the Java calendar classes so I've but up a number of methods to get the start days of months etc.
At the moment I'm trying to get a method working tha will loop around 12 times and assign the days in the month to a string array for printing later in another function but to test I'm printing to screen.
At the moment when I get the days to print on screen It shows me the days for Janurary similar to below 12 times and I've been looking at it so long I can't see the wood for the trees and I was just wondering if someone can point out when I'm going wrong here.
1 2 3 4 5 6
7 8 9 10 11 12 13
14 15 16 17 18 19 20
21 22 23 24 25 26 27
28 29 30 31
The data for the start days and total number of days in a month are held in arrays in seperate methods as well.
With the following code I'm just getting the days for Jan to print out 12 times.
I thnik the the problem is with the first part of the while loop It does not appear to be looping throught the DaysIn and TopLeft arrays as if I manually change the value of the variable l = 1; I get the days for Feb to print out.
static int [] DaysIn (int y) // return correct day in month
int [] LDays = {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}; // leap year.
int [] Days = {31, 28, 31, 30, 31, 31, 31, 30, 30, 31, 30, 31};
if (y%4==0 && (y%100!=0 || y%400==0)) // test if y is a leap year. y is gotten from print cal.
return LDays;
else
return Days;
static int [] TopLeft (int y) // find the starting position of the days in a month for printing
int [] k = StartDay(y);
int [] TopLeft = new int [12];
int t = 0;
while (t!=12)
TopLeft[t] = 1- k[t];
t++;
return TopLeft;
static String [] DispMonthDays(int y) // Method to supply the days of a month in grid form needs work.
int k = 0; // int to take the topleft value for each month
int DIM = 0; // int to take the total days in each month
String MonthD=""; // empty string
String [] MonthDay = new String [6];
int l= 0;
While(l!=12)
k = TopLeft(y)[l]; // Believe problem lies at these two lines
DIM = DaysIn(y)[l]; //
while (k != 42)
if (k < 1){MonthD = MonthD + " "+" "+" ";}
else if (k >=1 && k <=9){MonthD = MonthD + " "+ k +" ";}
else if (k >= 10 && k <= DIM){MonthD = MonthD + k + " ";}
else if(k > DIM){MonthD = MonthD +" ";}
k++;
MonthDay[0] = MonthD.substring(0,20);
MonthDay[1] = MonthD.substring(21,41);
MonthDay[2] = MonthD.substring(42,62);
MonthDay[3] = MonthD.substring(63,83);
MonthDay[4] = MonthD.substring(84,104);
MonthDay[5] = MonthD.substring(105,106);
l++;}
return MonthDay;
static void PrintCal(int y) // function to hand off year and print cal
int upstep=0;
int count=0;
while (count !=12)
while (upstep!=6)
System.out.print(DispMonthDays(y)[upstep]);System.out.println();
upstep++;
upstep=0;
count++;
}Any help greatly appreciatedGiven the previous valid comment here is my code again.
I'm running the code on the console
// Months of year
static final String [] MNames = {"January ", "February ", "March ",
"April ", "May ", "June ",
"July ", "August ", "September ",
"October ", "November ", "December "};
static int [] daysIn (int y) // see if y is a leap year and return correct day in month
int [] LDays = {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}; // leap year.
int [] Days = {31, 28, 31, 30, 31, 31, 31, 30, 30, 31, 30, 31};
if (y%4==0 && (y%100!=0 || y%400==0)) // test if y is a leap year. y is gotten from printCal.
return LDays;
else
return Days;
static int [] startDay(int y) // Find First Day of a month
int [] z = daysIn(y);
int firstDay =((y-1900)*365 +(y-1901)/4)%7;
int x = 0;
int [] startDay = new int [12];
while (x!=12)
if (x==0)
{startDay[0] = firstDay; firstDay = (firstDay+z[0])%7;}
else
{startDay[x] = firstDay; firstDay = (firstDay+z[x])%7;}
x++;
return startDay;
static int [] topLeft (int y) // find the starting position of the days in a month for printing
int [] k = startDay(y);
int [] topLeft = new int [12];
int t = 0;
while (t!=12)
topLeft[t] = 1- k[t];
t++;
return topLeft;
static String [] dispMonthDays(int y) // Method to supply the days of a month in grid form needs work.
int k = 0; // int to take the topleft value for each month
int dim = 0; // int to take the total days in each month
String monthD=""; // empty string
String [] monthDay = new String [6]; // String Array to take the results of MonthD and be returned 12 tmes
int loopThrough= 0; // int variable to progress through the topLeft and daysIn arrays
while(loopThrough !=12)
k = topLeft(y)[loopThrought]; // Not being moved through as far as I can see
dim = daysIn(y)[loopThrough];
while (k != 42)
if (k < 1){monthD = monthD + " "+" "+" ";}
else if (k >=1 && k <=9){monthD = monthD + " "+ k +" ";}
else if (k >= 10 && k <= dim){monthD = monthD + k + " ";}
else if(k > dim){monthD = monthD +" ";}
k++;}
monthDay[0] = monthD.substring(0,20);
monthDay[1] = monthD.substring(21,41);
monthDay[2] = monthD.substring(42,62);
monthDay[3] = monthD.substring(63,83);
monthDay[4] = monthD.substring(84,104);
monthDay[5] = monthD.substring(105,106);
l++;
return monthDay;
static void printCal(int y) // function to hand off year and print cal amended for testing to see if dispMonthDays is working
int count=0;
int upstep=0; // int variable to return the monthDay
while (count !=12)
while (upstep!=6)
System.out.print(dispMonthDays(y)[upstep]);
upstep++;
upstep=0;
count++;
public static void main (String [] args)
Scanner input = new Scanner (System.in);
System.out.print("Enter a year: "); int year = input.nextInt();
printCal(year);
I still think the problem is with the first loop in dispMonthDays -
I need Your Help for CAF/EU/GP/API Guided Procedures
Hi everyone, I need your help about Guided procedures CAF API, I am developing an WEB DYNPRO Callable Object for Guided Procedures, but I need to get the task name of the running proceess on Guided Procedure once time a user initiated it, if is possible? Do you have an examples?
Thenk you very muchHi,
Yes you can retrieve the task name of the running process. Here is what you need to do.
1. Get the process instance - IGPRuntimeManager - > getInstance()
2. Get the IGPActivityInstance(s) from the process instance - processInstance.getChildrenInformation().
3. Optionaly check if these child activities are Blocks or Actions. If Block drill further to get the Actions using getChildrenInformation().
4. Retreive the IGPActionInstance(s) from the Block Activities.
5. Get the IGPActivity object for these Actions using IGPActionInstance.getTemplate() method.
6. This object will have a method getTitle() which will retrive you the activity name.
Hope this helps.
Thanks
Kiran -
Some question about 9iAs R1.2.2 & R2, need your help:
Some question about 9iAs R1.2.2 & R2, need your help:
Since 2000, we has used 9iAS Core (R1.2.2) to publish our website. The platform is Suns Solaris (SPARC). The database is Oracle 8i. But there are so many questions:
1. The Web Cache cant be installed well
2. The web pages use JSP to query database with SQL show errors when we refresh the page a few times. The error will disappear after restarting the 9iAS or refreshing the page again. On the other hand, the same pages dont show error on resin. The error is java.sql.SQLException : Closed Connection: next. I supposed that the connection of database has some hidden troubles, but I can find it, could you give me some advice.
Now I have installed 9iAS R2, But when I visited the manage page, I found that a password is needed to visit the web cache manage page. I dont think I have set the password, and then I cant control the web cache. I want to know is a default password occurred? If not, what is the password.The default password for Web Cache is: administrator
See walkthrough on the sample code page: http://otn.oracle.com/sample_code/products/ias/content.html
HTH,
Ashesh Parekh
Oracle9iAS product management -
Hi I forgot my security question how I can rest becouse I was going APP this massage pop of in the app page I benn buying app in this iPod may time they are say for first time you are buying apps in iPod pls I need your help to resist my security question
The Three Best Alternatives for Security Questions and Rescue Mail
1. Send Apple an email request at: Apple - Support - iTunes Store - Contact Us.
2. Call Apple Support in your country: Customer Service: Contact Apple support.
3. Rescue email address and how to reset Apple ID security questions.
A substitute for using the security questions is to use 2-step verification:
Two-step verification FAQ Get answers to frequently asked questions about two-step verification for Apple ID. -
hi i have an ipad mini and i have not used it for 2 month or more. Today i have tried to use it i came across with a problem. my Ipad is blocked and it asks me to wait 23,401,418 what should i do need your help. thanks
Have you charged ipad Try a Reboot press & hold power button & menu button hold both down until you see Apple Logo You may need to do this more than once. Bsydd uk
-
having problem buying online.need your help since it's my first time here.apple is asking for my billing address but when i enter my address here in qatar,it's saying i should enter a valid zip code within the u.s.does it mean i can't buy online even if it wil be shipped within u.s. only?
To buy in for delivery in Qatar, you should be starting from the Apple Qatar site:
http://www.apple.com/qa/
Do you have an Apple-ID? if you do, then you should not have to enter your Address again, and may be able to sidestep the US Zip Code issue. -
Dear Iphone fans,
Recently, somehow I can't hear sounds when talking on my iphone4 either when calling or being called. When asking them later, they said they can hear me but my sound become very low and unclear. And I can't hear a thing at that time. Could anyone tell me how I could fix the problem.
I've bought this one for half a year. I need your help~
Thank you in advance.Dear Iphone fans,
Recently, somehow I can't hear sounds when talking on my iphone4 either when calling or being called. When asking them later, they said they can hear me but my sound become very low and unclear. And I can't hear a thing at that time. Could anyone tell me how I could fix the problem.
I've bought this one for half a year. I need your help~
Thank you in advance. -
I Need Your Help With My IPod Touch 4 I Would Like To Have Music To Listen To&I Would Like To Know How To Get Internet For My Apple IPod Touch 4 So I Can Have Music To Listen To.Thank You,Donna Spinner
Connect to your home wi-fi network.
Click Support at the top of this page, then click Manuals.
Select the ipod touch manual. -
please , i need youre help ! im from Mexico and i dont speak inglish well but ill try explain me... i buy a cs5 students edicion but i lost my paswoord for the instalacion can you helpe me ? how can i recuperade my paswoord
Creative SuitesFind your serial number quickly
Mylenium -
I Need your help ,pls. I can't use my iPhone . It can't on and off , no display anymore.
Hello Apple_Addict22,
Thank you for your question. iOS 7 requires iTunes 11.1. First, I recommend trying to obtain the update by going to the iTunes menu and selecting Check for Updates.
iTunes: How to install the latest version
http://support.apple.com/kb/ht5654
If you continue to get the message that iTunes is up to date, you can download the latest version of iTunes here:
Download iTunes
http://www.apple.com/itunes/download/
Once the file downloads, double click on the installation file that downloaded to initiate the installation.
Best,
Sheila M. -
HI ALL SINCE TWO DAYS I AM DOWNLOADING VIBER BUT I AM NOT HAVING MY ACCESS CODE AND EVERY TIME I DELETE THE APPLICATION AND DOWNLOADING IT AGAIN BUT ALWAYS THE SAME RESULT PLEASE I NEED YOUR HELP FOR THE ACCESS CODE.MY PHONE NUMBER IS 0022996969896.THANKS IN ADVANCE
try this website this should help you http://helpme.viber.com/index.php?/Knowledgebase/List/Index/1/iphone
-
Need your help on performance issue please
Hello everyone!
I need your help to understand an effect I notice with a Thread class I built. I currently work on enhancement of my application Playlist Editor (see http://www.lightdev.com/page74.htm) and a new release will be available soon.
Among other extensions the new release will have a title filter function which is based on audio data that is recursively read from ID3 tags of files found in a given root directory. The data collection is done by a CollectionThread class which reads into a data model class AudioDataModel and the entire process works fine, no problem with that.
However, when my application is started for the first time the CollectionThread runs approximately 3 minutes to collect data from approximately 4300 audio files on an Intel Pentium M 1,4 GHz, 512 MB RAM, Windows XP SP2. When the application is shut down and started again, it takes only a few seconds to do the same task for all subsequent launches.
I already tried to start the application with java option -Xms40m to increase initial heap size. This increases performance in general but the effect is still the same, i.e. first run lasts significantly longer than subsequent runs.
I also tried to build a pool mechanism which creates many empty objects in the data model and then releases them to contain the actual data at is being read in but this did not lead to better performance.
It must have to do with how Java (or Windows?) allocates and caches memory. I wonder whether there is a way to pre-allocate memory or if there are any other ideas to improve performance so that the process always only takes seconds instead of minutes?
I attach the key classes to this message. Any help or ideas is much appreciated!
Thanks a lot a best regards
Ulrich
PS: You can use the news subscription service at
http://www.lightdev.com/dynTemplate.php4?id=80&dynPage=subscribe.php4 to be informed when the new release of Playlist Editor is available.
All classes posted here do not need debugging, they already have proven to run error free. The classes are only posted for information for the interested reader - no need to go through all the stuff in detail - only if it interests you.
My application calls class CollectionThread wich is a subclass of InfoThread. CollectionThread recursively goes through a directory and file structure and stores found ID3 tag information in instances of class ID3v11Tag which in turn gets stored in one instance of class AudioDataModel. All classes are shown below.
This is the mentioned CollectionThread
* Light Development Playlist Editor
* Copyright (C) 2004 Ulrich Hilger
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
package com.lightdev.app.playlisteditor.data;
import com.lightdev.lib.util.InfoThread;
import java.io.File;
* A class to collect audio data from a given storage location.
* <p>
* <code>CollectionThread</code> uses ID3 tag information to gain data.
* </p>
* <p>See <a href="http://www.id3.org">http://www.id3.org</a> for details about
* ID3 tags.</p>
* @author Ulrich Hilger
* @author Light Development
* @author <a href="http://www.lightdev.com">http://www.lightdev.com</a>
* @author <a href="mailto:[email protected]">[email protected]</a>
* @author published under the terms and conditions of the
* GNU General Public License,
* for details see file gpl.txt in the distribution
* package of this software as well as any licensing notes
* inside this documentation
* @version 1, October 13, 2004
public class CollectionThread extends InfoThread {
* constructor
* @param model AudioDataModel the data model to collect data to
public CollectionThread(AudioDataModel model) {
this.model = model;
* constructor, creates a new empty AudioDataModel
public CollectionThread() {
this(new AudioDataModel());
* set the data model to collect data to
* @param model AudioDataModel the model to collect data to
public void setModel(AudioDataModel model) {
this.model = model;
* get the data model associated to this thread
* @return AudioDataModel the data model
public AudioDataModel getModel() {
return model;
* set the directory to collect data from
* @param rootDir File the directory to collect data from
public void setRootDirectory(File rootDir) {
this.rootDir = rootDir;
* do te actual work of this thread, i.e. iterate through a given directory
* structure and collect audio data
* @return boolean true, if work is left
protected boolean work() {
boolean workIsLeft = true;
maxValue = -1;
filesProcessed = 0;
if(getStatus() < STATUS_HALT_PENDING) {
countElements(rootDir.listFiles());
if(getStatus() < STATUS_HALT_PENDING) {
workIsLeft = collect(rootDir.listFiles());
return workIsLeft;
* count the elements in a given file array including its subdirectories
* @param files File[]
private void countElements(File[] files) {
int i = 0;
while (i < files.length && getStatus() < STATUS_HALT_PENDING) {
File file = files;
if (file.isDirectory()) {
countElements(file.listFiles());
i++;
maxValue++;
* recursively read data into model
* @param files File[] the file array representing the content of a given directory
private boolean collect(File[] files) {
int i = 0;
while(i < files.length && getStatus() < STATUS_HALT_PENDING) {
File file = files[i];
if(file.isDirectory()) {
collect(file.listFiles());
else if(file.getName().toLowerCase().endsWith("mp3")) {
try {
model.addTrack(file);
catch(Exception e) {
fireThreadException(e);
i++;
filesProcessed++;
fireThreadProgress(filesProcessed);
return (i<files.length);
/** the directory to collect data from */
private File rootDir;
/** the data model to collect data to */
private AudioDataModel model;
/** the number of files this thread processed so far while it is running */
private long filesProcessed = 0;
This is class InfoThread
* Light Development Java Library
* Copyright (C) 2003, 2004 Ulrich Hilger
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
package com.lightdev.lib.util;
import java.util.Vector;
import java.util.Enumeration;
* Abstract class <code>InfoThread</class> implements a status and listener concept.
* An <code>InfoThread</code> object actively informs all objects registered as listeners about
* status changes, progress and possible exceptions. This way the status of a running
* thread does not require a polling mechanism to be monitored.
* <p>
* <code>InfoThread</code> implements the following working scheme
* </p>
* @author Ulrich Hilger
* @author Light Development
* @author <a href="http://www.lightdev.com">http://www.lightdev.com</a>
* @author <a href="mailto:[email protected]">[email protected]</a>
* @author published under the terms and conditions of the
* GNU General Public License,
* for details see file gpl.txt in the distribution
* package of this software
* @version Version 1, October 13, 2004
public abstract class InfoThread extends Thread {
* construct an <code>InfoThread</code> object
* <p>This class is meant to be used when a <code>Thread</code> object is needed that actively
* informs other objects about its status</code>. It is a good idea therefore to register
* one or more listeners with instances of this class before doing anything
* else.</p>
* @see addInfoThreadListener
public InfoThread() {
* set the amount of time this thread shall idle after it is through with one
* work cycle and before a next work cycle is started. This influences the time
* other threads have for their work.
* @param millis long the number of milliseconds to idle after one work cycle
public void setIdleMillis(long millis) {
idleMillis = millis;
* Causes this thread to begin execution; the Java Virtual Machine calls the <code>run</code>
* method of this thread. Calls method <code>prepareThread</code> before calling
* <code>run</code>.
* @see run
* @see prepareThread
public synchronized void start() {
setStatus(STATUS_INITIALIZING);
prepareThread();
setStatus(STATUS_READY);
super.start();
* call method <code>start</code> instead of this method.
* calling this method directly will lead to an exception
* @see start
public void run() {
//System.out.println("InfoThread.run");
if (status == STATUS_READY) {
boolean workIsLeft = true;
setStatus(STATUS_RUNNING);
while (status < STATUS_STOP_PENDING && workIsLeft) {
if (status < STATUS_HALT_PENDING) {
workIsLeft = work();
if(!workIsLeft) {
setStatus(STATUS_WORK_COMPLETE);
if (status == STATUS_HALT_PENDING) {
setStatus(STATUS_HALTED);
else if (status == STATUS_STOP_PENDING) {
setStatus(STATUS_STOPPED);
else {
try {
sleep(idleMillis);
catch (InterruptedException e) {
fireThreadException(e);
else {
// error: Thread is not ready to run
setStatus(STATUS_THREAD_FINISHED);
* stop this thread. This will terminate the thread irrevokably. Use method
* <code>haltThread</code> to pause a thread with the possiblity to resume work later.
* @see haltThread
public void stopThread() {
switch (status) {
case STATUS_RUNNING:
setStatus(STATUS_STOP_PENDING);
break;
case STATUS_HALT_PENDING:
// exception: the thread already is about to halt
break;
case STATUS_STOP_PENDING:
// exception: the thread already is about to stop
break;
default:
// exception: a thread can not be stopped, when it is not running
break;
* halt this thread, i.e. pause working allowing to resume later
* @see resumeThread
public void haltThread() {
switch (status) {
case STATUS_RUNNING:
setStatus(STATUS_STOP_PENDING);
break;
case STATUS_HALT_PENDING:
// exception: the thread already is about to halt
break;
case STATUS_STOP_PENDING:
// exception: the thread already is about to stop
break;
default:
// exception: a thread can not be halted, when it is not running
break;
* resume this thread, i.e. resume previously halted work
* @see haltThread
public void resumeThread() {
if(status == STATUS_HALTED || status == STATUS_HALT_PENDING) {
setStatus(STATUS_RUNNING);
else {
// exception: only halted threads or threads that are about to halt can be resumed
* this is the method to prepare a thread to run. It is not implemented in this abstract
* class. Subclasses of <code>InfoThread</code> can implement this method to do anything
* that might be required to put their thread into STATUS_READY. This method is called
* automatically by method <code>start</code>. When implementing this method, it should
* call method <code>fireThreadException</code> accordingly.
* @see start
* @see fireThreadException
protected void prepareThread() {
// does nothing in this abstract class but might be needed in subclasses
* this is the main activity method of this object. It is not implemented in this abstract
* class. Subclasses of <code>InfoThread</code> must implement this method to do something
* meaningful. When implementing this method, it should call methods
* <code>fireThreadProgress</code> and <code>fireThreadException</code> accordingly.
* @return boolean true, if work is left, false if not
* @see fireThreadProgress
* @see fireTreadException
protected abstract boolean work();
* add an <code>InfoTreadListener</code> to this instance of <code>InfoThread</code>
* @param l InfoThreadListener the listener to add
* @see removeInfoThreadListener
public void addInfoThreadListener(InfoThreadListener l) {
listeners.add(l);
* remove an <code>InfoTreadListener</code> from this instance of <code>InfoThread</code>
* @param l InfoThreadListener the listener to remove
public void removeInfoThreadListener(InfoThreadListener l) {
listeners.remove(l);
* notify all <code>InfoThreadListener</code>s of a status change
* @param fromStatus int the status tis thread had before the change
* @param toStatus int the status this thread has now
protected void fireThreadStatusChanged(int fromStatus, int toStatus) {
Enumeration e = listeners.elements();
while(e.hasMoreElements()) {
Object l = e.nextElement();
if(l instanceof InfoThreadListener) {
((InfoThreadListener) l).threadStatusChanged(this, fromStatus, toStatus);
* notify all <code>InfoThreadListener</code>s of an exception in this thread
* @param ex Exception the exception that occurred
protected void fireThreadException(Exception ex) {
Enumeration e = listeners.elements();
while(e.hasMoreElements()) {
Object l = e.nextElement();
if(l instanceof InfoThreadListener) {
((InfoThreadListener) l).threadException(this, ex);
* notify all <code>InfoThreadListener</code>s of the progress of this thread
* @param progressValue long a value indicating the current thread progress
protected void fireThreadProgress(long progressValue) {
Enumeration e = listeners.elements();
while(e.hasMoreElements()) {
Object l = e.nextElement();
if(l instanceof InfoThreadListener) {
((InfoThreadListener) l).threadProgress(this, progressValue, maxValue);
* set the status of this thread and notify all listeners
* @param newStatus int the status this thread is to be changed to
private void setStatus(int newStatus) {
//System.out.println("InfoThread.setStatus oldStatus=" + status + ", newStatus=" + newStatus);
int fromStatus = status;
status = newStatus;
fireThreadStatusChanged(fromStatus, newStatus);
* get the current status of this thread
* @return int the status
public int getStatus() {
return status;
* cleanup before actual destruction.
public void destroy() {
//System.out.println("InfoThread.destroy");
cleanup();
super.destroy();
* cleanup all references this thread maintains
private void cleanup() {
//System.out.println("InfoThread.cleanup");
listeners.removeAllElements();
listeners = null;
/* ----------------------- class fields start ------------------------ */
/** storage for the objects this thread notifies about status changes and progress */
private Vector listeners = new Vector();
/** indicator for the status of this thread */
private int status = STATUS_NONE;
/** maximum value for threadProgress */
protected long maxValue = -1;
/** the idle time inside one work cycle in milliseconds */
protected long idleMillis = 1;
/* ----------------------- class fields end -------------------------- */
/* ----------------------- constants start --------------------------- */
/** constant value indicating that no status has been set so far */
public static final int STATUS_NONE = 0;
/** constant value indicating that the thread is currently initializing */
public static final int STATUS_INITIALIZING = 1;
/** constant value indicating that the thread is ready to run */
public static final int STATUS_READY = 2;
/** constant value indicating that the thread is running */
public static final int STATUS_RUNNING = 3;
/** constant value indicating that the thread is about to halt */
public static final int STATUS_HALT_PENDING = 4;
/** constant value indicating that the thread is halted */
public static final int STATUS_HALTED = 5;
/** constant value indicating that the work of this thread is complete */
public static final int STATUS_WORK_COMPLETE = 6;
/** constant value indicating that the thread is about to stop */
public static final int STATUS_STOP_PENDING = 7;
/** constant value indicating that the thread is stopped */
public static final int STATUS_STOPPED = 8;
/** constant value indicating that the thread is finished */
public static final int STATUS_THREAD_FINISHED = 9;
/* ----------------------- constants end --------------------------- */
}this is the InfoThreadListener interface
* Light Development Java Library
* Copyright (C) 2003, 2004 Ulrich Hilger
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
package com.lightdev.lib.util;
* An interface classes interested to receive events from objects
* of class <code>InfoThread</code> need to implement.
* @author Ulrich Hilger
* @author Light Development
* @author <a href="http://www.lightdev.com">http://www.lightdev.com</a>
* @author <a href="mailto:[email protected]">[email protected]</a>
* @author published under the terms and conditions of the
* GNU General Public License,
* for details see file gpl.txt in the distribution
* package of this software
* @version Version 1, October 13, 2004
public interface InfoThreadListener {
* method to receive a status change notification from a thread
* @param thread InfoThread the thread which status changed
* @param fromStatus int the status which the thread had before the change
* @param toStatus int the status which the thread has now
public void threadStatusChanged(InfoThread thread, int fromStatus, int toStatus);
* method to receive a notification about the progress of a thread
* @param thread InfoThread the thread which notified about its progress
* @param progressValue long the value (e.g. 10 if 100 percent completed, 20 of 1 million files processed, etc.)
public void threadProgress(InfoThread thread, long progressValue, long maxValue);
* method to receive a notifiaction about the fact that an exception occurred in a thread
* @param thread InfoThread the thread for which an exception occurred
* @param e Exception the exception that occurred
public void threadException(InfoThread thread, Exception e);
}This is class AudioFileDescriptor
* Light Development Java Library
* Copyright (C) 2004 Ulrich Hilger
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
package com.lightdev.lib.audio;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.io.Serializable;
import java.text.DecimalFormat;
* This class models characteristics of an audio file such as the absolute path
* of the file, its tag contents (if any) and the play duration, etc.
* <p>See <a href="http://www.id3.org">http://www.id3.org</a> for details about
* ID3 tags.</p>
* @author Ulrich Hilger
* @author Light Development
* @author <a href="http://www.lightdev.com">http://www.lightdev.com</a>
* @author <a href="mailto:[email protected]">[email protected]</a>
* @author published under the terms and conditions of the
* GNU General Public License,
* for details see file gpl.txt in the distribution
* package of this software
* @version Version 1, October 13, 2004
public class AudioFileDescriptor implements Serializable, Comparable {
public AudioFileDescriptor(String absolutePath) throws FileNotFoundException, IOException {
load(absolutePath);
public boolean equals(Object o) {
if(o != null && o instanceof AudioFileDescriptor) {
return ((AudioFileDescriptor) o).getAbsolutePath().equalsIgnoreCase(this.getAbsolutePath());
else {
return false;
public void load(String absolutePath) throws FileNotFoundException, IOException {
this.absolutePath = absolutePath;
RandomAccessFile rf = new RandomAccessFile(absolutePath, "r");
if(id3v11Tag == null) {
id3v11Tag = new ID3v11Tag(rf, false);
else {
id3v11Tag.readTag(rf, rf.length() - 128);
rf.close();
public String getAbsolutePath() {
return absolutePath;
public ID3v11Tag getID3v11Tag() {
return id3v11Tag;
public void setID3v11Tag(ID3v11Tag tag) {
this.id3v11Tag = tag;
public String toString() {
DecimalFormat df = new DecimalFormat("00");
return id3v11Tag.getArtist() + ", " + id3v11Tag.getAlbum() + " - " +
df.format(id3v11Tag.getTrackNumber()) + " " + id3v11Tag.getTitle();
* Compares this object with the specified object for order.
* @param o the Object to be compared.
* @return a negative integer, zero, or a positive integer as this object is less than, equal to,
* or greater than the specified object.
* @todo Implement this java.lang.Comparable method
public int compareTo(Object o) {
return toString().compareTo(o.toString());
private String absolutePath;
private ID3v11Tag id3v11Tag;
private transient long duration = -1;
private transient int type = TYPE_UNKNOWN;
public static final transient int TYPE_UNKNOWN = 0;
public static final transient int TYPE_MP3 = 1;
}This is class ID3V11Tag into which the data is actually stored
* Light Development Java Library
* Copyright (C) 2004 Ulrich Hilger
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
package com.lightdev.lib.audio;
import java.io.File;
import java.io.RandomAccessFile;
import java.io.IOException;
import java.io.Serializable;
import java.text.DecimalFormat;
* This class is a very simple implementation of an ID3v11Tag. It models an ID3 tag
* pretty much the same way as it is physically stored inside an audio file.
* <p>See <a href="http://www.id3.org">http://www.id3.org</a> for details about
* ID3 tags.</p>
* @author Ulrich Hilger
* @author Light Development
* @author <a href="http://www.lightdev.com">http://www.lightdev.com</a>
* @author <a href="mailto:[email protected]">[email protected]</a>
* @author published under the terms and conditions of the
* GNU General Public License,
* for details see file gpl.txt in the distribution
* package of this software
* @version Version 1, October 13, 2004
public class ID3v11Tag implements Serializable, Comparable {
* construct an ID3v11Tag and read tag content from a given file
* <p>This constructor can be used for cases where a RandomAccessFile has already
* been opened and will be closed elsewhere</p>
* @param rf RandomAccessFile the open file to read from
* @param isAtTagStartPos boolean true, if the file pointer is at the
* position where the ID3 tag starts; when false, the pointer is positioned accordingly here
* @throws IOException
public ID3v11Tag(RandomAccessFile rf, boolean isAtTagStartPos) throws IOException {
if(isAtTagStartPos) {
readTag(rf);
else {
readTag(rf, rf.length() - 128);
* construct an ID3v11Tag and read tag content from a file at a given location
* <p>This constructor opens and closes the audio file for reading</p>
* @param absolutePath String the absolute path to the audio file to open
* @throws IOException
public ID3v11Tag(String absolutePath) throws IOException {
RandomAccessFile rf = new RandomAccessFile(absolutePath, "r");
readTag(rf, rf.length() - 128);
rf.close();
* construct an ID3v11Tag and read tag content from a given file
* <p>This constructor opens and closes the audio file for reading</p>
* @param audioFile File the audio file to read from
* @throws IOException
public ID3v11Tag(File audioFile) throws IOException {
this(audioFile.getAbsolutePath());
* get a string representation of this object
* @return String
public String toString() {
DecimalFormat df = new DecimalFormat("00");
return getArtist() + ", " + getAlbum() + " - " + df.format(getTrackNumber()) + " " + getTitle();
* position to file pointer and read the tag
* @param rf RandomAccessFile the file to read from
* @param jumpPos long the position to jump to (the tag start position)
* @throws IOException
public void readTag(RandomAccessFile rf, long jumpPos) throws IOException {
rf.seek(jumpPos);
readTag(rf);
* read the tag from a given file, assuming the file pointer to be at the tag start position
* @param rf RandomAccessFile the file to read from
* @throws IOException
public void readTag(RandomAccessFile rf) throws IOException {
rf.read(tagBuf);
if(tag.equalsIgnoreCase(new String(tagBuf))) {
rf.read(title);
rf.read(artist);
rf.read(album);
rf.read(year);
rf.read(comment);
rf.read(trackNo);
rf.read(genre);
public String getTitle() {
return new String(title).trim();
public String getArtist() {
return new String(artist).trim();
public String getAlbum() {
return new String(album).trim();
public String getYear() {
return new String(year).trim();
public String getComment() {
return new String(comment).trim();
public int getGenreId() {
try {
int id = new Byte(genre[0]).intValue();
if(id < GENRE_ID_MIN || id > GENRE_ID_MAX) {
return GENRE_ID_OTHER;
else {
return id;
catch(Exception ex) {
return GENRE_ID_OTHER;
public String getGenreName() {
return genreNames[getGenreId()];
public int getTrackNumber() {
try {
return (int) trackNo[0];
catch(Exception e) {
return 0;
* Compares this object with the specified object for order.
* @param o the Object to be compared.
* @return a negative integer, zero, or a positive integer as this object is less than, equal to,
*Hi Franck,
thank you, mate. I did what you suggested (changed class attached) but that did not change the mentioned behaviour.
The first run is approximately 75 seconds with Java option -Xms40m and approx. double without, the second run and all subsequent runs are only 2-3 seconds each (!!!) even when terminating and re-starting the application between thread runs.
I'm pretty clueless about that, any more help on this anyone?
Thanks a lot and best regards
Ulrich
PS: BTW, I forgot to post the class that is filled with data by class CollectionThread, so here it is
* Light Development Playlist Editor
* Copyright (C) 2004 Ulrich Hilger
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
package com.lightdev.app.playlisteditor.data;
import java.io.File;
import com.lightdev.lib.audio.ID3v11Tag;
import javax.sound.sampled.UnsupportedAudioFileException;
import java.io.IOException;
import java.io.Serializable;
import com.lightdev.lib.audio.AudioFileDescriptor;
import com.lightdev.lib.ui.SortListModel;
import java.util.Iterator;
* Storage model for audio data.
* <p>
* <code>AudioDataModel</code> can be used to store ID3 tag data collected from
* a directory with audio files to perform queries and reports on the found data.
* </p>
* <p>See <a href="http://www.id3.org">http://www.id3.org</a> for details about
* ID3 tags.</p>
* @author Ulrich Hilger
* @author Light Development
* @author <a href="http://www.lightdev.com">http://www.lightdev.com</a>
* @author <a href="mailto:[email protected]">[email protected]</a>
* @author published under the terms and conditions of the
* GNU General Public License,
* for details see file gpl.txt in the distribution
* package of this software as well as any licensing notes
* inside this documentation
* @version 1, October 15, 2004
public class AudioDataModel extends SortListModel implements Serializable {
* constructor
public AudioDataModel() {
* add an audio track from a given audio file
* <p>This will attempt to read ID3 tag data from the file.</p>
* @param audioFile File the file to add audio data for
* @throws IOException
public void addTrack(File audioFile) throws IOException {
AudioFileDescriptor afd = new AudioFileDescriptor(audioFile.getAbsolutePath());
if (!data.contains(afd)) {
data.add(afd);
* get all tracks for agiven combination of genre name, artist name and album name. Any of
* the parameters may be null or AudioDataModel.FILTER_ALL
* <p>Ugly code, I know, but it simply hard codes all combinations of the the mentioned
* parameters. Any more elegant implementations welcome.</p>
* @param genreName String a genre name to get tracks for
* @param artistName String an artist name to get tracks for
* @param albumName String an album name to get tracks for
* @return SortListModel the found tracks in a list model
public SortListModel getTracks(String genreName, String artistName, String albumName) {
SortListModel foundTracks = new SortListModel();
Iterator e = data.iterator();
while(e.hasNext()) {
AudioFileDescriptor afd = (AudioFileDescriptor) e.next();
ID3v11Tag tag = afd.getID3v11Tag();
if(genreName == null || genreName.equalsIgnoreCase(FILTER_ALL)) {
if(artistName == null || artistName.equalsIgnoreCase(FILTER_ALL)) {
if (tag.getAlbum().equalsIgnoreCase(albumName))
foundTracks.add(afd);
else {
if(albumName == null || albumName.equalsIgnoreCase(FILTER_ALL)) {
if (tag.getArtist().equalsIgnoreCase(artistName))
foundTracks.add(afd);
else {
if (tag.getArtist().equalsIgnoreCase(artistName) &&
tag.getAlbum().equalsIgnoreCase(albumName))
foundTracks.add(afd);
else {
if(artistName == null || artistName.equalsIgnoreCase(FILTER_ALL)) {
if(albumName == null || albumName.equalsIgnoreCase(FILTER_ALL)) {
if (tag.getGenreName().equalsIgnoreCase(genreName))
foundTracks.add(afd);
else {
if (tag.getGenreName().equalsIgnoreCase(genreName) &&
tag.getAlbum().equalsIgnoreCase(albumName))
foundTracks.add(afd);
else {
if(albumName == null || albumName.equalsIgnoreCase(FILTER_ALL)) {
if (tag.getGenreName().equalsIgnoreCase(genreName) &&
tag.getArtist().equalsIgnoreCase(artistName))
foundTracks.add(afd);
else {
if (tag.getGenreName().equalsIgnoreCase(genreName) &&
tag.getArtist().equalsIgnoreCase(artistName) &&
tag.getAlbum().equalsIgnoreCase(albumName))
foundTracks.add(afd);
foundTracks.sort();
return foundTracks;
* list all artists in this model
* @return SortListModel
public SortListModel listArtists() {
SortListModel artists = new SortListModel();
artists.add(FILTER_ALL);
Iterator e = data.iterator();
while (e.hasNext()) {
ID3v11Tag tag = ((AudioFileDescriptor) e.next()).getID3v11Tag();
String artistName = tag.getArtist();
if (artists.indexOf(artistName) < 0) {
artists.add(artistName);
artists.sort();
return artists;
* list all artists in this model having titles belonging to a given genre
* @param genreName String name of the genre artists are searched for
* @return SortListModel
public SortListModel listArtists(String genreName) {
SortListModel artists = new SortListModel();
artists.add(FILTER_ALL);
Iterator e = data.iterator();
while (e.hasNext()) {
ID3v11Tag tag = ((AudioFileDescriptor) e.next()).getID3v11Tag();
String artistName = tag.getArtist();
String genre = tag.getGenreName();
if (artists.indexOf(artistName) < 0 && genre.equalsIgnoreCase(genreName)) {
artists.add(artistName);
artists.sort();
return artists;
* list all genres in this model
* @return SortListModel
public SortListModel listGenres() {
SortListModel genres = new SortListModel();
genres.add(FILTER_ALL);
Iterator e = data.iterator();
while (e.hasNext()) {
ID3v11Tag tag = ((AudioFileDescriptor) e.next()).getID3v11Tag();
String genreName = tag.getGenreName();
if (genres.indexOf(genreName) < 0) {
genres.add(genreName);
genres.sort();
return genres;
* list all albums in this model
* @return SortListModel
public SortListModel listAlbums() {
SortListModel albums = new SortListModel();
albums.add(FILTER_ALL);
Iterator e = data.iterator();
while (e.hasNext()) {
ID3v11Tag tag = ((AudioFileDescriptor) e.next()).getID3v11Tag();
String albumName = tag.getAlbum();
if (albums.indexOf(albumName) < 0) {
albums.add(albumName);
albums.sort();
return albums;
* list all albums in this model having titles belonging to a given genre
* @param genreName String name of the genre albums are searched for
* @return SortListModel
public SortListModel listAlbums(String genreName) {
SortListModel albums = new SortListModel();
albums.add(FILTER_ALL);
Iterator e = data.iterator();
while (e.hasNext()) {
ID3v11Tag tag = ((AudioFileDescriptor) e.next()).getID3v11Tag();
String albumName = tag.getAlbum();
String genre = tag.getGenreName();
if (albums.indexOf(albumName) < 0 && genre.equalsIgnoreCase(genreName)) {
albums.add(albumName);
albums.sort();
return albums;
* list all albums in this model having titles belonging to a given genre and artist
* @param genreName String name of the genre albums are searched for
* @param artistName String name of the artist albums are searched for
* @return SortListModel
public SortListModel listAlbums(String genreName, String artistName) {
SortListModel albums = new SortListModel();
albums.add(FILTER_ALL);
Iterator e = data.iterator();
while (e.hasNext()) {
ID3v11Tag tag = ((AudioFileDescriptor) e.next()).getID3v11Tag();
String albumName = tag.getAlbum();
String genre = tag.getGenreName();
String artist = tag.getArtist();
if(genreName == null || genreName.equalsIgnoreCase(FILTER_ALL)) {
if (albums.indexOf(albumName) < 0 &&
artist.equalsIgnoreCase(artistName))
albums.add(albumName);
else {
if (albums.indexOf(albumName) < 0 &&
genre.equalsIgnoreCase(genreName) &&
artist.equalsIgnoreCase(artistName))
albums.add(albumName);
albums.sort();
return albums;
* get the number of audio tracks stored in this data model
* @return int the number of tracks
public int getTrackCount() {
return data.size();
/** constant to select all items of a given part */
public static final String FILTER_ALL = " all";
}...and here the changed CollectionThread now caching found File objects in a vector
* Light Development Playlist Editor
* Copyright (C) 2004 Ulrich Hilger
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
package com.lightdev.app.playlisteditor.data;
import com.lightdev.lib.util.InfoThread;
import java.io.File;
import java.util.Vector;
import java.util.Enumeration;
* A class to collect audio data from a given storage location.
* <p>
* <code>CollectionThread</code> uses ID3 tag information to gain data.
* </p>
* <p>See <a href="http://www.id3.org">http://www.id3.org</a> for details about
* ID3 tags.</p>
* @author Ulrich Hilger
* @author Light Development
* @author <a href="http://www.lightdev.com">http://www.lightdev.com</a>
* @author <a href="mailto:[email protected]">[email protected]</a>
* @author published under the terms and conditions of the
* GNU General Public License,
* for details see file gpl.txt in the distribution
* package of this software as well as any licensing notes
* inside this documentation
* @version 1, October 13, 2004
public class CollectionThread extends InfoThread {
* constructor
* @param model AudioDataModel the data model to collect data to
public CollectionThread(AudioDataModel model) {
this.model = model;
* constructor, creates a new empty AudioDataModel
public CollectionThread() {
this(new AudioDataModel());
* set the data model to collect data to
* @param model AudioDataModel the model to collect data to
public void setModel(AudioDataModel model) {
this.model = model;
* get the data model associated to this thread
* @return AudioDataModel the data model
public AudioDataModel getModel() {
return model;
* set the directory to collect data from
* @param rootDir File the directory to collect data from
public void setRootDirectory(File rootDir) {
this.rootDir = rootDir;
* this is the method to prepare a thread to run.
protected void prepareThread() {
maxValue = -1;
filesProcessed = 0;
innerCount = 0;
fileList = new Vector();
* do the actual work of this thread, i.e. iterate through a given directory
* structure and collect audio data
* @return boolean true, if work is left
protected boolean work() {
boolean workIsLeft = true;
if(getStatus() < STATUS_HALT_PENDING) {
countElements(rootDir.listFiles());
if(getStatus() < STATUS_HALT_PENDING) {
workIsLeft = collect(); //collect(rootDir.listFiles());
fileList.clear();
fileList = null;
return workIsLeft;
* count the elements in a given file array including its subdirectories
* @param files File[]
private void countElements(File[] files) {
int i = 0;
while (i < files.length && getStatus() < STATUS_HALT_PENDING) {
File file = files;
if (file.isDirectory()) {
countElements(file.listFiles());
else {
fileList.add(file);
i++;
maxValue++;
* read data into model
* @param files File[] the file array representing the content of a given directory
* @return boolean true, if work is left
private boolean collect(/*File[] files*/) {
Enumeration files = fileList.elements();
while(files.hasMoreElements() && getStatus() < STATUS_HALT_PENDING) {
File file = (File) files.nextElement();
try {
model.addTrack(file);
catch(Exception e) {
fireThreadException(e);
filesProcessed++;
if(++innerCount > 99) {
innerCount = 0;
fireThreadProgress(filesProcessed);
return false;
int i = 0;
while(i < files.length && getStatus() < STATUS_HALT_PENDING) {
File file = files[i];
if(file.isDirectory()) {
collect(file.listFiles());
else if(file.getName().toLowerCase().endsWith("mp3")) {
try {
model.addTrack(file);
catch(Exception e) {
fireThreadException(e);
i++;
filesProcessed++;
fireThreadProgress(filesProcessed);
return (i<files.length);
/** the directory to collect data from */
private File rootDir;
/** the data model to collect data to */
private AudioDataModel model;
/** the number of files this thread processed so far while it is running */
private long filesProcessed = 0;
/** a list to temporary store found files */
private Vector fileList;
/** counter to determine when to fire progress messages */
private int innerCount = 0;
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