Agile Fusion

There is a new article that describes jsr 75 PIM package implementation.

Here is also some sample code that opens up the contacts loops through the list and extracts Name and phoneNumber from each record.

if (PhoneConstants.JSR75_INCLUDED) {
PIM pimInstance = PIM.getInstance();
ContactList list = (ContactList) pimInstance.openPIMList( PIM.CONTACT_LIST, PIM.READ_WRITE);
Enumeration contacts = list.items();
while (contacts.hasMoreElements()) {
Contact contact = (Contact) contacts.nextElement();
String name = "";
if (list.isSupportedField(Contact.TEL)) {
for (int i = 0, size = contact.countValues(Contact.TEL); i < size; i++) {
String telStr = contact.getString(Contact.TEL, i);
int attr = contact.getAttributes(Contact.TEL, i);
String phoneType = null;
if ((attr & Contact.ATTR_SMS) != 0) {
phoneType = "sms";
} else if ((attr & Contact.ATTR_MOBILE) != 0) {
phoneType = "mobile";
} else if ((attr & Contact.ATTR_HOME) != 0) {
phoneType = "home";
}
}
}
}
}

// TODO: find out how to post code snippets in WordPress

technorati tags: j2me jsr75 PIM

It looks like some VM bug where the inheritance of classes brakes.

I have 3 classes
class a { public void method1(){}}
class b extends a {public void method1{}}
class c extends b {public void method1{}}

As you can see each class overrides the implementation of method1.
During runtime it happens sometime that the object is instanceof c, though when method1 is invoked, vm uses class a implementation from the top class in the inheritance tree.

I wonder if Sprint did any over the air buggy firmware update in the last month, as I’m absolutely sure that it this worked fine on A900 month ago, and it does work on all the other devices (as it’s supposed to).

At the current phase of the project I’m into the optimization. We have a CSSHelper class that has all the possible css values set in the map that is statically initialized. So on RAZR it takes 50 seconds to just load the class into the memory, absolutely unacceptable.

So poking around the web I found this great slides from JavaOne on optimization techniques: Effective J2ME.

Below is a small paragraph on static array initialization:

Static Array Initialization

• Problem

• Array initialization performed in static initializer

• This can cause significant code bloat and slow down class loading and initialization

• Impact

• Application startup, memory footprint

• Guideline

• Move initialization out of static initializer and do programmatic initialization or read data from I/O

Solution here is to create binary file that would be created at build time and packaged into the jar. Add init() method to the class to read the binary file from the jar as resource.

technorati tags: j2me razr optimization static array initialization

It all started when I was not able to open new mail that comes into my gmail account, which I use to consolidate all my email accounts. The error looked like this:

“oops… the system was unable to perform your operation(error code 766).
please try again in a few seconds.”

Now it is a Murphy’s law, that it is down right when I need it the most. I guess I need to do some research on web mail UI that I can install in my own server. Zimbra looks really promising in that area, though lack of documentation hurts.

I always loved the PMD plugin and the idea of detecting bad code at build time. So the guys at jutils provide the maven plugin lint4j that is able to detect whole bunch of potential problems in your code in regards of security and scalability:

Lint4j was created to help software developers detect defects and security vulnerabilities before writing the first test case.