The Repository

How to mask a String while showing part of the String (last 4 digits)

2010-04-26T03:00:00.000-07:00

Following code sample shows how to mask a string while showing last 4 digits. Normally you are not allwoed to save the entire account number or credit card number in your database. Better option is to mask the number and saving.

public class Mask {

    public static void main(String[] args) {
        String accno = "4444333322221221";
        StringBuffer sb = new StringBuffer();
        if (accno != null && !accno.isEmpty()) {
            Integer length = accno.length();
            Integer mask = length;
            if (length > 4) {
                mask = length - 4;
                for (int i = 0; i < mask; i++) {
                    sb.append("x");
                }
                sb.append(accno.substring(mask));
               
            }
            System.out.println("Masked String : " + sb);
        }

    }

}

result wil be shown like this:

Masked String : xxxxxxxxxxxx1221

Here a link that describes why account number should be masked.
http://www.pinoytechblog.com/archives/does-your-bank-mask-your-account-number

Single-ended association proxies issues

2009-12-24T00:16:00.000-08:00

you may often face the following exception in Hibernate.

java.lang.ClassCastException:
com.roshan.services.payment.gateway.domain.GatewayProfile_$$_javassist_11

This happens when you try to do something like this:

public void doSomething(IPaymentModeProfile paymentModeProfile){
//something goes here
switch (id) {
  // ACH(101), CPA(102), CREDIT(103), DIRECT_DEBIT(104), MAESTRO(105),
  // PINLESS_DEBIT(106)
  case 101: {
   //something goes here
  }
   break;
  case 102: {
   //something goes here
  }
   break;
  case 103: {
   CreditCard creditCard = (CreditCard) paymentModeProfile;
   //do something with creditCard

  }
   break;
  case 104: {
   //something goes here

  }
   break;
  case 105: {
   //something goes here
  }
   break;
  case 106: {
   //something goes here
  }
   break;

  }

}

Using interface proxies together with polymorphism can lead to sporadic ClassCastExceptions. This problem occurs whenever two mapped subclasses have an identical property and the instances are loaded polymorphically through the base class.

This was due to the fact that a lazily loaded List of objects retrieved by hibernate contained proxied objects. The entities that were proxied were using a single table inheritance strategy, so there is a base class that is subclassed several times. The entities once loaded were being sorted into separate lists that are typed according to the subclasses, they were being cast into the appropriate subclass but this cast was failing because instead of being an instance of say GatewayProfile it was an instance of GatewayProfile_$$_javassist_11 i.e.

Assume CreditCard implements the IPaymentModeProfile interface. The gist of the problem is that Hibernate is trying to optimize and avoid going to the database by returning a proxy object. However, a proxy object cannot be downcast to the subclass object, the exception occurs because of downcasting. There are lot of solution to avoid this problem.

The first solution to this issue is use their own interfaces instead of your entity and its subclass. In this case cglib creates a proxy class that implements all the interfaces specified in the proxy attribute (in both class and joined sub-class tags). Everywhere in your code, you should access the entity through the interfaces
and not the implementation classes.

Ex: create a Interface Called ICreditCard instead of CreditCard class.

Follow this link for more information. http://sysin.wordpress.com/2009/02/27/hibernate-inheritance-classcastexception-part-1/

The second solution is that use visitor pattern.

Follow this link for more information. http://andykayley.blogspot.com/2009/05/how-to-avoid-classcastexceptions-when.html

The third solution is extract the real object from hibernate proxy. This is very simple and not taking too much time to implement. This is the only solution that you don't need to write extra classes.

if (paymentModeProfile instanceof HibernateProxy) {
// convert the hibernate proxy to an object.
    Object object = paymentModeProfile;
 // get the real object
    CreditCard creditCard = (CreditCard) ((HibernateProxy) object).getHibernateLazyInitializer().getImplementation();
 
 // do anything with creditCard
 }

cheers..!!!

Google Chrome Extensions: Blog This! (by Google)

2009-12-09T19:41:00.000-08:00

Google Chrome Extensions: Blog This! (by Google)

Easymock Tutorial

2009-09-24T01:59:00.001-07:00

Check out this SlideShare Presentation:

Easymock Tutorial

View more presentations from subin123.

Spring Security 3.0.0.M2 Released

2009-09-22T05:28:00.000-07:00

Luke Taylor , A enior Member of Acegi Security System TeamSpring Team announced that they have reached the second milestone release for Spring Security 3.0.0. It contains some notable changes to the configuration namespace which spring users should be aware of.

Full details can be found in the changelog as usual, but the most notable change is that the use of the "decorator" style namespace elements has been discontinued.

To summarize the namespace changes:

Namespace elements which create an AuthenticationProvider instance must be declared as children of the <authentication-manager>.
The use of <custom-authentication-provider> has been dropped. Use <authentication-provider ref='yourProviderBeanName'> as a child of the <authentication-manager> element.
<custom-filter> should no longer be used to decorate filter beans, but used with a ref="yourFilterBean" attribute as a child of the <http> block.
<custom-after-invocation-provider> declarations should be replaced by <after-invocation-provider ref='yourProviderBeanName'> within the <global-method-security> element.
The session-controller-ref has been moved to the concurrent-session-control element (SEC-1197).

All namespace configurations must now include the element in order to instantiate the AuthenticationManager (it is no longer created internally). These changes are also described in the updated manual and are used in the sample applications.

As with Spring 3.0, this is the second release which requires a minimum JDK 1.5 to run and also require Spring 3.0, so you should get hold of the Spring 3.0.0.M3 release if you aren't already using it.

Reference : SpringSource

Love Aaj Kal [2009] / New Source PDVD Rip / XViD / 700 MB

2009-09-21T09:08:00.000-07:00

Complete name : Love aaj kal 2009.avi
Format : AVI
Format/Info : Audio Video Interleave
Format/Family : RIFF
File size : 697 MiB
PlayTime : 2h 11mn
Bit rate : 737 Kbps
Video #0
Codec : XviD
Codec/Family : MPEG-4
Codec/Info : XviD project
PlayTime : 2h 11mn
Bit rate : 636 Kbps
Width : 688 pixels
Height : 256 pixels
Audio #1
Codec : MPEG-1 Audio layer 3
Codec profile : Joint stereo
PlayTime : 2h 11mn
Bit rate : 94 Kbps
Bit rate mode : CBR
Channel(s) : 2 channels

http://rapidshare.com/files/265689739/Love_aaj_kal_2009.avi.001
http://rapidshare.com/files/265689671/Love_aaj_kal_2009.avi.002
http://rapidshare.com/files/265689730/Love_aaj_kal_2009.avi.003
http://rapidshare.com/files/265689755/Love_aaj_kal_2009.avi.004
http://rapidshare.com/files/265689782/Love_aaj_kal_2009.avi.005
http://rapidshare.com/files/265690007/Love_aaj_kal_2009.avi.006
http://rapidshare.com/files/265689799/Love_aaj_kal_2009.avi.007

Log In with Your Facebook Username

2009-09-17T21:23:00.000-07:00

A couple of months ago, Facebook has introduced a own user name for users. That helps to find and connect with each other very easily. Beginning today, they have introduced another new feature using Facebook user name. With this new feature users will be able to log in to their Facebook accounts using

Facebook user name a and password from any browser,mobile phone or Facebook Connect-enabled website.

For example, user can enter username, "roshansn" in place of my email address when he log in to Facebook.

This doesnt mean that logging with email address is dissabled. You will still be able to log in with your email.This is a very convenient way to access your Facebook account compare with logging with email address. A username gives you an easy-to-remember web address for your Facebook profile so your friends can more easily find and connect with you. If you don't have a Facebook username yet, you can choose one here.

Channel 4 Video Analysis

2009-09-16T23:56:00.000-07:00

Analysis of Chanel 4 video. Find the attachment and share it.

Channel 4 video analysis.ppt

How to use source level 5 in Maven projects?

2009-09-16T10:34:00.000-07:00

When compiling a project with enableTemplating set to true via maven2, you may have encountered the following error:

Annotation is not allowed in -source 1.3 use -source 5 or higher to enable annotation.

Generics are not allowed in -source 1.3 use -source 5 or higher to enable generics.

To solve this you must add the source level at your pom.xml.

<build>
  <plugins>
   <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <configuration>
     <source>1.5</source>
     <target>1.5</target>
    </configuration>
   </plugin>
  </plugins>
 </build>

Live Life Colours

2009-09-10T06:48:00.000-07:00

White

Brides wear white to symbolize innocence and purity. White reflects light and is considered a summer color. White is popular in decorating and in fashion because it is light, neutral, and goes with everything. However, white shows dirt and is therefore more difficult to keep clean than other colors. Doctors and nurses wear white to imply sterility.

Black

Black is the color of authority and power. It is popular in fashion because it makes people appear thinner. It is also stylish and timeless. Black also implies submission. Priests wear black to signify submission to God. Some fashion experts say a woman wearing black implies submission to men. Black outfits can also be overpowering, or make the wearer seem aloof or evil. Villains, such as Dracula, often wear black.

Red

The most emotionally intense color, red stimulates a faster heartbeat and breathing. It is also the color of love. Red clothing gets noticed and makes the wearer appear heavier. Since it is an extreme color, red clothing might not help people in negotiations or confrontations. Red cars are popular targets for thieves. In decorating, red is usually used as an accent. Decorators say that red furniture should be perfect since it will attract attention.
The most romantic color, pink, is more tranquilizing. Sports teams sometimes paint the locker rooms used by opposing teams bright pink so their opponents will lose energy.

Blue

The color of the sky and the ocean, blue is one of the most popular colors. It causes the opposite reaction as red. Peaceful, tranquil blue causes the body to produce calming chemicals, so it is often used in bedrooms. Blue can also be cold and depressing. Fashion consultants recommend wearing blue to job interviews because it symbolizes loyalty. People are more productive in blue rooms. Studies show weightlifters are able to handle heavier weights in blue gyms.

Green

Currently the most popular decorating color, green symbolizes nature. It is the easiest color on the eye and can improve vision. It is a calming, refreshing color. People waiting to appear on TV sit in Ã¢â‚¬Å“green roomsÃ¢â‚¬ï¿½ to relax. Hospitals often use green because it relaxes patients. Brides in the Middle Ages wore green to symbolize fertility. Dark green is masculine, conservative, and implies wealth. However, seamstresses often refuse to use green thread on the eve of a fashion show for fear it will bring bad luck.

Yellow

Cheerful sunny yellow is an attention getter. While it is considered an optimistic color, people lose their tempers more often in yellow rooms, and babies will cry more. It is the most difficult color for the eye to take in, so it can be overpowering if overused. Yellow enhances concentration, hence its use for legal pads. It also speeds metabolism.

Purple

The color of royalty, purple connotes luxury, wealth, and sophistication. It is also feminine and romantic. However, because it is rare in nature, purple can appear artificial.

Brown

Solid, reliable brown is the color of earth and is abundant in nature. Light brown implies genuineness while dark brown is similar to wood or leather. Brown can also be sad and wistful. Men are more apt to say brown is one of their favorite colors.

Search Engine Rap Battle

2009-09-09T04:41:00.000-07:00

MSN vs Google

MSN vs Yahoo

Yahoo vs Google

Now you can select what is the best search engine. Please go to http://searchenginerapbattle.com and vote for Google, Yahoo or MSN. My choice is Google. It is the ever best search engine.

Watch Compaq Cup Cricket Series 2009 Live Online

2009-09-08T03:47:00.000-07:00

All of the teams are excellent teams. Sri Lanka, India and New Zealand have awesome players on their teams. But who will get the chance of being the winner of Compaq Cup cricket series 2009? If you want to find out, you should watch Compaq Cup cricket series 2009 live online at http://mvnrepository.blogspot.com

Happy Birthday Internet

2009-09-07T03:28:00.000-07:00

Wed, Sep 2nd 2009, the 'Internet' turned 40 today. It may sound strange, but today it is quite impossible to think oft world without the 'World Wide Web'.

On Sept 2, 1969, around about 20 people gathered in a lab at the University of California, Los Angeles and two bulky computers were used to pass test data through a 15-foot gray cable. That was the beginning of the Internet. Now, 40 years later, we take a look at the Internet timeline.

Key milestones in the development and growth of the Internet

1969: On September 2, two computers at University of California, Los Angeles, exchange meaningless data in first test of Arpanet, an experimental military network. The first connection between two sites UCLA and the Stanford Research Institute in Menlo Park, California takes place on October 29, though the network crashes after the first two letters of the word "logon." UC Santa Barbara and University of Utah later join.

1970: Arpanet gets first East Coast node, at Bolt, Beranek and Newman in Cambridge, Mass.

1972: Ray Tomlinson brings e-mail to the network, choosing "at" symbol as way to specify e-mail addresses belonging to other systems.

1973: Arpanet gets first international nodes, in England and Norway.

1974: Vint Cerf and Bob Kahn develop communications technique called TCP, allowing multiple networks to understand one another, creating a true Internet. Concept later splits into TCP/IP before formal adoption on January 1, 1983.

1983: Domain name system is proposed. Creation of suffixes such as ".com," ''.gov" and ".edu" comes a year later.

1988: One of the first Internet worms, Morris, cripples thousands of computers.

1989: Quantum Computer Services, now AOL, introduces America Online service for Macintosh and Apple II computers, beginning an expansion that would connect nearly 27 million Americans online by 2002.

1990: Tim Berners-Lee creates the World Wide Web while developing ways to control computers remotely at CERN, the European Organization for Nuclear Research.

1993: Marc Andreessen and colleagues at University of Illinois create Mosaic, the first Web browser to combine graphics and text on a single page, opening the Web to the world with software that is easy to use.

1994: Andreessen and others on the Mosaic team form a company to develop the first commercial Web browser, Netscape, piquing the interest of Microsoft Corp. and other developers who would tap the Web's commerce potential. Two immigration lawyers introduce the world to spam, advertising their green card lottery services.

1995: Amazon.com Inc. opens its virtual doors.

1996: Passage of US law curbing pornography online. Although key provisions are later struck down as unconstitutional, one that remains protects online services from liability for their users' conduct, allowing information and misinformation to thrive.

1998: Google Inc. forms out of a project that began in Stanford dorm rooms. US government delegates oversight of domain name policies to Internet Corporation for Assigned Names and Numbers, or ICANN. Justice Department and 20 states sue Microsoft, accusing the maker of the ubiquitous Windows operating system of abusing its market power to thwart competition from Netscape and others.

1999: Napster popularizes music file-sharing and spawns successors that have permanently changed the recording industry. World Internet population surpasses 250 million.

2000: The dot-com boom of the 1990s becomes a bust as technology companies slide. Amazon.com, eBay and other sites are crippled in one of the first widespread uses of the denial-of-service attack, which floods a site with so much bogus traffic that legitimate users cannot visit.

2002: World Internet population surpasses 500 million.

2006: World Internet population surpasses 1 billion.

2008: World Internet population surpasses 1.5 billion. China's Internet population reaches 250 million, surpassing the United States as the world's largest. Netscape's developers pull the plug on the pioneer browser, though an offshoot, Firefox, remains strong. Major airlines intensify deployment of Internet service on flights.

Astronauts with Satellite

2009-08-30T22:49:00.000-07:00

This function has none of DETERMINISTIC, NO SQL, or READS SQL DATA in its declaration and binary

2009-08-27T04:56:00.000-07:00

Today I was struggling while creating a funtion on mysql database. It can be executed with the root privilageds but shows an error massage when it is executed with low privilages. The error massage is shown bellow.

ERROR HY000: This function has none of DETERMINISTIC, NO SQL, or READS SQL DATA in its
declaration and binary logging is enabled (you *might* want to use the less safe
log_bin_trust_function_creators variable)

>>To avoid this error you must do one of the following.

Specify the one or more of DETERMINISTIC, NO SQL, and/or READS SQL DATA key words in your stored function definition.
Set the value of "log_bin_trust_function_creators" to '1',
(mysql> SET GLOBAL log_bin_trust_function_creators = 1;)

You can also set this variable by using the --log-bin-trust-function-creators=1 option when starting the server.

>>The current conditions on the use of stored functions in MySQL 5.0 can be summarized as follows. These conditions do not apply to stored procedures and they do not apply unless binary logging is enabled.

To create or alter a stored function, you must have the SUPER privilege, in addition to the CREATE ROUTINE or ALTER ROUTINE privilege that is normally required.
When you create a stored function, you must declare either that it is deterministic or that it does not modify data. Otherwise, it may be unsafe for data recovery or replication.

>>For more information refer this article "Binary Logging of Stored Programs".

Symposium on Localised Systems and Applications

2009-08-27T03:42:00.000-07:00

Sri Lanka has made impressive progress in developing localised software, systems and applications. Today, our citizens can use computer operating systems, application software, keyboards and mobile phones in their mother tongues of Sinhala and Tamil.

We can be proud that this has been achieved in Sri Lanka, by practitioners in the emerging field of local language computing. However, a forum where they can meet and share their experiences has been a long-felt need.

The inaugural Symposium on Localised Systems and Applications will be held at the University of Moratuwa on 2nd September 2009 from 8.30 a.m to 5.00 p.m. This will provide people working in this area an unprecedented opportunity to present and discuss their work with others in the field.

Time	Presenter	Organization	Topic
08:30	Inauguration
08:45	Gihan Dias	UoM	Welcome
09:00	Vice Chancellor	UoM	Address
09:15	J. B. Disanayaka		Keynote - Meaning: A Linguistic Analysis
09:45	Sanath Jayasena	UoM	Vote of Thanks
10:00	TEA
10:30	Sanath Jayasena Dihan Morawaka	UoM USJP/LKiNG	USJP/LKiNG The LAKapps Project Experiences with Localised Applications Training
10:45	Kanishka Senadheera Channa Gunasekera	Felidae	1. ViduNena 2. Sinhala Wikipedia
11:00	G. Balachandaran	APIIT	Tamil Encoding, Keyboard Layout and Collation Standard for ICT Sri Lanka
11:15	Sarves	UoM	Tamil Localisation Process
11:25	M. Mayuran		Tamil GNU developments
11:35	Rohana Dasanayaka	ACCIMT	Localising the Thunderbird e-Mail Client
11:45	Rohan Manamudali Sampath Godamunne	ScienceLand	Interoperable Transliteration Software Localization of Microsoft Windows Vista and Office
12:00	Chamara	LKNIC	Internationalised Domain Names in Sri Lanka
12:10	S. Bandusena Anura Lokugamage	Official Lang Dept.	Sinhala Glossaries
12:25	Madura Kulatunga	Madura	Madura online English-Sinhala Dictionary
12:40	Wasantha Deshapriya	ICTA	Common repository for Localized Terms
13:00	LUNCH
14:00	Asoka Karunananda	UoM	Issues and Experiences in Translation
14:10	Ruvan Weerasinghe	UCSC	Towards machine translation of local languages
14:25	Dulip Herath	UCSC	Building linguistic resources for Sinhala and Tamil
14:35	Viraj Welgama	UCSC	Building and extending TTS for Sinhala
14:45	Budditha Hettige	USJP	Sinhala computing work at SJP
15:00	Camillus Jayewardena	UoP	The Making of a Web Site of Sinhala Song Lyrics
15:10	Shaseevan Ganeshanathan	Noolaham Foundation	Local Language Content Preservation through Digitization and Archiving
15:25	තුසිත රන්දුනුගේ Suranga Sampath Jayakodi	e-Fusion	"සිසු උගනා ගම වඩනා" - ශිල්ප සයුර සමගින් ගමට තොරතුරු තාක්‍ෂණය සිංහලෙන්
15:35	Malinda Siriwardana	e-Learning UCSC	Moodle Localization - The Future
15:45	Nisansala Vidanapathirana	University of Colombo Institute for Agro-technology and Rural Sciences	Farmer Education in Sinhala Using Online Distance Learning
15:55	Sameera Wijeratne	Dialog	Nenasa TV
16:05	TEA
16:30	Discussion		Localization Strategy for Sri Lanka
17:00	Conclusion

Aeturnum Cricket Slam 2009

2009-08-26T11:14:00.000-07:00

The Aeturnum Cricket Team, emerged Runners-up at the Aeturnum Cricket Slam 2009, which was held at Torrington Grounds on 22nd August 2009. Samith Pinnaduwa won the “Man of the Series” award and MilleniumIT carried away the champion’s trophy.

Facebook user interface has been changed

2009-08-26T06:03:00.000-07:00

Always Facebook tries to change their user interface. There are two latest changes that are introduced by them today. They’ve changed the blue bar on top of the page; furthermore, they’ve slightly altered the way ad ratings work.

Before, It displayed little thumbs up/down icons below every advertisement. Now, Facebook has simply added you the option to “like” the ad (below) or to turn it off via an “x” at the top right corner. It’s not groundbreaking by any means, but it does make the page a little less cluttered.

The other change is very straightforward: the blue bar on the top, one of Facebook’s most recognizable elements, now extends throughout the entire width of the page.

I am not sure whether people have noticed those changes because I also didn’t notice changes. I am pretty sure the user who works with facebook ads may noticed.

Gmail Lets You “Undo” Sent Messages

2009-08-25T21:15:00.000-07:00

Another day, another new feature in Gmail Labs. This one could be more useful than most, as it’s something you probably have a reason to use with some frequency. It’s called “Undo Send,” and as the name suggests, it lets you take back a sent email, as long as you act quickly enough.

After enabling the feature, Undo Send works much like Gmail’s other “undo” features. When you send an email, you get a message confirming it has been sent, along with a link to “Undo.” This message lasts for 5 seconds, at which point you lose the opportunity to take it back.

While that might not be much time, it’s probably enough to pull back emails where you forget an attachment, forget to cc someone, or catch an obvious typo. As for emails you later wish you hadn’t sent because of the content, Gmail still can’t help you there.