www.orangeapple.org
Open in
urlscan Pro
66.6.44.4
Public Scan
URL:
https://www.orangeapple.org/
Submission: On May 30 via automatic, source rescanner — Scanned from DE
Submission: On May 30 via automatic, source rescanner — Scanned from DE
Form analysis 1 forms found in the DOM
GET /search
<form action="/search" method="get">
<input type="text" name="q" class="text" value=""><input type="submit" class="submit" value="Search">
</form>Text Content
About Twitter Ask RSS
We thought different, it's your turn now!
Dec 10 '15
★
SPRING MVC ANGULARJS HIBERNATE BOOTSTRAP JWT TOKEN AUTHENTICATED REST API SINGLE
PAGE JAVA WEBAPP FRAMEWORK
INTRODUCTION
I am showcasing a webapp template project framework that can be used AS-IS to
begin developing a modern AngularJS Single Page Web App backed by Spring and
Java. The projects brings together Java, Spring 4, Spring MVC 4, Spring JPA,
Hibernate, Angular JS, Twitter Bootstrap, JWT Token Authentication technology in
a clean easy to use fashion. Download and start building your next big thing in
Java. Free your mind of scalability and other web app development scares.
The stack here consists of Spring MVC, AngularJS, Hibernate, Spring JPA, Twitter
Bootstrap, JWT Token Authentication, RESTful API. All of these are nicely
brought togather with a bunch of Java and JS boilerplate code meant to give a
template framework allowing the flow of control in conventional way. Consider
this as a pre-configured Java Template Project Framework promoting the
Convention over Configuration idea of Design.
WHATS IN THE PROJECT?
The project includes all the code required to create and authenticate a new user
including backend models, entities, repositories, service, controller code and
frontend forms and relevant javascript validations. Refer the screenshots for
getting some idea of the functionality. Also implemented is a ready to use form
validation setup in javascript, along with URL redirection based on
authenticated and un-authenticated sections/endpoints of the website. Also
implemented is the simple JWT token based authentication of the REST API
endpoints.
The project organizes the code in the following sections-
1. Framework - java package housing the common data, dao, service, common code
classes to generalize most of the boilerplate code using Java generics and
other similar rich features.
2. Model - java package housing the code related to creating database entities
and repository classes defining code to access these entities from database
using Hibernate and Spring JPA.
3. Service - java package housing the code defining the various methods
specific to your business logic to manipulate the data accordingly.
4. Interceptor - Spring AOP in action here to remove redundant boilerplate code
to handle and respond to exceptions in a standard way and also collect
performance metrics of the API and service. Refer:
WebAppMetricsInterceptor.java, WebAppExceptionAdvice.java
5. Auth - package housing the filter code to process and handle JWT Token based
authentication of the REST API requests.
6. Core - package housing the code associated with running a scheduled set of
background jobs. The idea with this code piece is to enable offload
asynchronous processing like sending mails, uploading files to S3, etc. It
needs more work to better setup the thread pools, etc. The code present here
today shows a small coding problem I did to create a priority based job
runner prioritized using Category they belong to. This also shows a job
queue that can be persisted to database for execution of jobs without
missing.
7. Categories - The category entity shows a self link entity object that lets
you create categories and sub categories of categories using a single table.
8. AngularJS App - the entire AngularJS app is placed in the webapp directory
and further organizes the JavaScript code into services, controllers, views
and models giving a convention-over-configuration setup to start building
your AngularJS powered Web UI. The entire purpose of this code piece is to
get you bootstrapped and running ASAP. The primary single page app (SPA) is
loaded in index.html.
EXECUTING
Download the code and build the project the same way as you would do for any
maven project. I have currently plugged in the test-jdbc xml file in the
configuration that creates and runs a InMemory H2 database. I also included a
standard MySQL Spring JDBC xml file. Use that one by changing the context file
in web.xml and after changing the parameters there according to your local MySQL
setup.
TECHNOLOGIES
* Java
* Spring
* Spring MVC
* Spring AOP
* Hibernate
* Angular JS
* Twitter Bootstrap
* JWT Token Auth
* Domain Driven Model
* Maven
REFERENCES
I have heavily referenced many external links and books while creating this
project apart from my own experience. I am listing a few of them here. If I
missed something, please accept my deepest apologies. I also spent a long time
trying to implement Spring Security based authentication but ultimately failed.
My whole approach here was to bring everything together in a simple and easy and
ready to reuse package. I have tried to avoid any direct copying of code though,
since most of it required some kind of changes. Most of the spring security code
is copied from elsewhere but you would find it in the unused package since it
was never really used in the functioning website.
1. AngularJS In Action
2. https://github.com/jwtk/jjwt
ENJOY!!
GitHub Repo for the project:
https://github.com/ykameshrao/spring-mvc-angular-js-hibernate-bootstrap-java-single-page-jwt-auth-rest-api-webapp-framework
SCREENSHOTS
Home Page
Registration Page demonstrating JS form validation
Registration Page with valid data
Dashboard Page post successful registration
Sample REST API response for Login Page
11 notes 2 Comments Tags: spring angularjs spring mvc spring aop hibernate java
javascript webapp web application singlepageapp single page applications restful
jwt jwt token authenticated
Share196
Jul 7 '12
★
SPRING, HIBERNATE, SPRING DATA, AKKA, TWITTER BOOTSTRAP, APACHE TILES, JQUERY
POWERED MAVEN JAVA WEB PROJECT KICKSTARTER CODEBASE
I am happy to upload my second project to GitHub to help people get started with
Java Web App Development as quickly as possible. I am sharing this code with
Apache License 2.0. Here is the URL for the same:
https://github.com/ykameshrao/spring-hibernate-springdata-springmvc-maven-project-framework
The project consists of following parts:
1) Commons-Deps: Dependencies declared as a single pom file to easily manage the
project dependencies. It is upto personal choice of users to still continue have
it this way or go with their own chosen method to manage dependencies in maven
pom.
2) Commons: A lot of common code snippets are provided as part of commons jar
module to help send mails using gmail, java mail, utf8 encoding, JCS cache
managers, session managers, random string, etc.
3) Framework: This part of the code base includes JPA and Spring Data Entities,
JPA and Spring Data Repositories, Services which are built using Java Generics
to help provide the CRUD actions on these Entities when users build their own
domain specific entities, repositories and services extending the ones provided
here. It also contains, API and Web App Controllers providing basic
functionality again for people interested in building their own Spring MVC
controllers using these. Also, contained here are validators, exceptions, AOP
based exception handlers.
4) Your Own Web App Code: This part of the code provides a bootstrapped web
project with API and Web UI using the best practices I picked across time to do
things using the third party frameworks, libraries I have chosen here. The API
parts is configured to accept and generate both XML and JSON request and
response formats. Akka is also configured here to present the method in which it
can be used to offload activities from your Spring MVC controllers (Servlets).
Here it is programmed to offload the task of sending emails.
This is the wrapper framework laid out to start building Spring based Web apps
with Hibernate ORM layer or Spring Data ORM powered NoSQL and Spring MVC in Java
programming language. The purpose of this project is to get you started quickly
in Java web app development over a widely used and tested Java web development
infrastructure.
This project provides sample hibernate entities, spring data entities, akka
actors to offload mail sending like jobs, models, repositories, services and
controllers classes. There are also many framework level classes to help handle
exceptions and errors in the project you may start developing using this. The UI
for the default simple web project bundled in this framework is built using
Twiiter Bootstrap, Apache Tiles, jQuery, jQuery Validation, JSPs.
I can try my best to provide with as much detail as possible here, but the best
way to understand all that is provided is by reading the code. Therefore, I also
provided a sample web app project with functionality to register and login a
user. All the code is presented in a package structure that can be renamed as
per your own choice and requirements. Enjoy!
Configurations
> config/props/mail.properties mail.transport.protocol=smtps
> mail.host=smtp.gmail.com mail.user= mail.pass= mail.port=465
> mail.starttls=true mail.auth=true mail.debug=true mail.fromAddress=
> config/props/database.properties jdbc.driverClassName=com.mysql.jdbc.Driver
> jdbc.url=jdbc:mysql://localhost:3306/yourwebprojectdb jdbc.username=
> jdbc.password= hibernate.c3p0.min_size=5 hibernate.c3p0.max_size=20
> hibernate.c3p0.timeout=600 hibernate.c3p0.max_statements=50
> src/main/resources/tiles/templates.web.xml <?xml version=“1.0”
> encoding=“UTF-8” ?> <!DOCTYPE tiles-definitions PUBLIC "-//Apache
> Software Foundation//DTD Tiles Configuration 2.0//EN"
> "http://tiles.apache.org/dtds/tiles-config_2_0.dtd"> <tiles-definitions>
> <definition name=“base” template=“/WEB-INF/views/layout/web.jsp”>
> <put-attribute name=“title” value=“” /> <put-attribute name=“header”
> value=“/WEB-INF/views/common/header.web.jsp” /> <put-attribute
> name=“message” value=“/WEB-INF/views/common/message.web.jsp” /> <put-attribute
> name=“content” value=“” /> <put-attribute name=“footer”
> value=“/WEB-INF/views/common/footer.web.jsp” /> </definition> <definition
> name=“home” extends=“base”> <put-attribute name=“title” value=“Your Web
> Project” /> <put-attribute name=“content”
> value=“/WEB-INF/views/web/home.web.jsp” /> </definition> <definition
> name=“userRegistration” extends=“base”> <put-attribute name=“title”
> value=“Register” /> <put-attribute name=“content”
> value=“/WEB-INF/views/web/userRegistration.web.jsp” /> </definition>
> <definition name=“dashboard” extends=“base”> <put-attribute name=“title”
> value=“Dashboard” /> <put-attribute name=“content”
> value=“/WEB-INF/views/web/dashboard.web.jsp” /> </definition>
> <definition name=“error” extends=“base”> <put-attribute name=“title”
> value=“Error” /> <put-attribute name=“content”
> value=“/WEB-INF/views/web/error.web.jsp” /> </definition>
> </tiles-definitions>
> Startup VM Options Required
> -Dconf.path=“path-to-config-folder-on-target-machine-containing-property-files”
> Refer: src/main/resources/config/spring/applicationContext-properties.xml
> <util:properties id=“mdbProps”
> location=“file:#{systemProperties[‘conf.path’]}/config/props/mongodb.properties”
> /> <util:properties id=“dbProps”
> location=“file:#{systemProperties['conf.path’]}/config/props/database.properties”
> /> <util:properties id=“logProps”
> location=“file:#{systemProperties['conf.path’]}/config/props/log4j.properties”
> /> <util:properties id=“amProps”
> location=“file:#{systemProperties['conf.path’]}/config/props/api.messages.properties”
> /> : :
Screenshots
The frameworks strung together supporting multiple activities in this framework
layer of code are - Maven Java 1.7 Spring 3.1.1 Hibernate 4+ Spring Data MongoDB
Akka 1.3+ Apache Tiles 2+ Twitter Bootstrap 2+ Velocity for Mails BootSwatch
jQuery
10 notes 14 Comments Tags: spring hibernate akka spring-data twiiter-bootstrap
apache-tiles jsp spring-mvc open-source programming
Share108
Jan 13 '12
★
SCALA BASED SPRING HIBERNATE WIREFRAME TO GET YOU STARTED IN SCALA WEB APP
DEVELOPMENT OVER SPRING
This is the wrapper wireframe framework laid out to start building Spring based
Web apps with Hibernate ORM layer and Spring MVC in Scala programming language.
The purpose of this project is to get you started quickly in Scala web app
development over a tried and tested java framework: Spring.
This project provides sample hibernate entities, models, DAOs, Service and
Controller classes. There are also many framework level classes to help handle
exceptions and errors in the project you may start developing using this. Used
components: Spring 3+ Hibernate 3+ Scala 2.9+ Maven
Link to my first open source
project: https://github.com/ykameshrao/scala-spring-hibernate-springmvc-maven-framework
89 notes 4 Comments Tags: scala spring hibernate open-source programming
software
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Dec 26 '11
★
ANDROID CUSTOM HYPERLINKED TEXTVIEW
This Post is Contributed by Y. Ramesh Rao
(http://stackoverflow.com/users/92039/y-ramesh-rao)
Finding Links in Android is very simple you might have heard of Linkify which is
a great class in which there are many static methods for getting a simple job
done but the problem is that in Linkify you cannot specify the behavior that you
require on clicking the links at the Most what Linkify does is that it simply
finds the links based on the “Pattern” you provide and adds a “Scheme” string to
complete the URL and created a Android Intent for Launching the Browser.
The Linkify behavior cannot be overridden as all the methods in Linkify class
are static final.
This was the issue that inspired me to create a Custom TextView Widget the one
which collects the links in my scenario I also programmed it to collect the the
Strings starting with “@” and “#” but this things can be changed by simply
changing the Patterns that you require and giving the proper Regular Expression
for them.
The LinkEnableTextView class is like this:
import java.util.ArrayList;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import android.content.Context;
import android.text.Spannable;
import android.text.SpannableString;
import android.text.style.ClickableSpan;
import android.util.AttributeSet;
import android.view.View;
import android.widget.TextView;
public class LinkEnabledTextView extends TextView
{
// The String Containing the Text that we have to gather links from private SpannableString linkableText;
// Populating and gathering all the links that are present in the Text
private ArrayList<Hyperlink> listOfLinks;
// A Listener Class for generally sending the Clicks to the one which requires it
TextLinkClickListener mListener;
// Pattern for gathering @usernames from the Text
Pattern screenNamePattern = Pattern.compile("(@[a-zA-Z0-9_]+)");
// Pattern for gathering #hasttags from the Text
Pattern hashTagsPattern = Pattern.compile("(#[a-zA-Z0-9_-]+)");
// Pattern for gathering http:// links from the Text
Pattern hyperLinksPattern = Pattern.compile("([Hh][tT][tT][pP][sS]?:\\/\\/[^ ,'\">\\]\\)]*[^\\. ,'\">\\]\\)])");
public LinkEnabledTextView(Context context, AttributeSet attrs)
{
super(context, attrs);
listOfLinks = new ArrayList<Hyperlink>();
}
public void gatherLinksForText(String text)
{
linkableText = new SpannableString(text);
/*
* gatherLinks basically collects the Links depending upon the Pattern that we supply
* and add the links to the ArrayList of the links
*/
gatherLinks(listOfLinks, linkableText, screenNamePattern);
gatherLinks(listOfLinks, linkableText, hashTagsPattern);
gatherLinks(listOfLinks, linkableText, hyperLinksPattern);
for(int i = 0; i< listOfLinks.size(); i++)
{
Hyperlink linkSpec = listOfLinks.get(i);
android.util.Log.v("listOfLinks :: " + linkSpec.textSpan, "listOfLinks :: " + linkSpec.textSpan);
/*
* this process here makes the Clickable Links from the text
*/
linkableText.setSpan(linkSpec.span, linkSpec.start, linkSpec.end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}
/*
* sets the text for the TextView with enabled links
*/
setText(linkableText);
}
/*
* sets the Listener for later click propagation purpose
*/
public void setOnTextLinkClickListener(TextLinkClickListener newListener)
{
mListener = newListener;
}
/*
* The Method mainly performs the Regex Comparison for the Pattern and adds them to
* listOfLinks array list
*/
private final void gatherLinks(ArrayList<Hyperlink> links,
Spannable s, Pattern pattern)
{
// Matcher matching the pattern
Matcher m = pattern.matcher(s);
while (m.find())
{
int start = m.start();
int end = m.end();
/*
* Hyperlink is basically used like a structure for storing the information about
* where the link was found.
*/
Hyperlink spec = new Hyperlink();
spec.textSpan = s.subSequence(start, end);
spec.span = new InternalURLSpan(spec.textSpan.toString());
spec.start = start;
spec.end = end;
links.add(spec);
}
}
/*
* This is class which gives us the clicks on the links which we then can use.
*/
public class InternalURLSpan extends ClickableSpan
{
private String clickedSpan;
public InternalURLSpan (String clickedString)
{
clickedSpan = clickedString;
}
@Override
public void onClick(View textView)
{
mListener.onTextLinkClick(textView, clickedSpan);
}
}
/*
* Class for storing the information about the Link Location
*/
class Hyperlink
{
CharSequence textSpan;
InternalURLSpan span;
int start;
int end;}
Now, having this you require just another interface for propagating the clicks
to the place you require to handle them in my case I implemented the interface
in my Activity and simple wrote a Log Command there.
The TextLinkClickListener interface is like this:
import android.view.View;
public interface TextLinkClickListener
{
/*
* This method is called when the TextLink is clicked from LinkEnabledTextView
*/
public void onTextLinkClick(View textView, String clickedString)
}
After doing all this you just require to create an Activity using the Custom
LinkEnabledTextView and check the things out yourself. There are a few things
that you must do while creating a object of the Custom LinkEnabledTextView those
are mentioned and described in the Code of the Activity below:
import android.text.method.MovementMethod;
import com.umundoinc.Tvider.Component.LinkEnabledTextView.LinkEnabledTextView;
import com.umundoinc.Tvider.Component.LinkEnabledTextView.TextLinkClickListener;
import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.text.method.LinkMovementMethod;
import android.view.View;
/*
* Here the Activity is implementing the TextLinkClickListener the one we have created
* the Clicks over the Links are forwarded over here from the LinkEnabledTextView
*/
public class TextViewActivity extends Activity implements TextLinkClickListener
{
private LinkEnabledTextView check;
protected void onCreate(Bundle savedInstance)
{
super.onCreate(savedInstance);
String text = "This is a #test of regular expressions with http://example.com links as used in @twitter
for performing various operations based on the links this handles multiple links like
http://this_is_fun.com and #Awesomess and @Cool";
check = new LinkEnabledTextView(this, null);
check.setOnTextLinkClickListener(this);
check.gatherLinksForText(text);
check.setTextColor(Color.WHITE);
check.setLinkTextColor(Color.GREEN);
MovementMethod m = check.getMovementMethod();
if ((m == null) || !(m instanceof LinkMovementMethod)) {
if (check.getLinksClickable()) {
check.setMovementMethod(LinkMovementMethod.getInstance());
}
}
setContentView(check);
}
public void onTextLinkClick(View textView, String clickedString)
{
android.util.Log.v("Hyperlink clicked is :: " + clickedString, "Hyperlink clicked is :: " + clickedString);
}
Here, is the Screenshot describing the output in my Listener method I programmed
it to display a Toast but anything can be achieved in same method.
Now that’s pretty much all that you’ll need that makes the Custom
LinkEnabledTextView working, try it out and share your views and reviews over
it.
6 notes 5 Comments Tags: Programming android code samples software
Share167
May 3 '09
★
GOOGLE – THE WORLD’S FIRST $100 BILLION BEHEMOTH
Well, never really expected a company to be that big and especially when all its
offerings (from search to videos, social networking, office docs and analytics)
are available for FREE. Google does not charge a single penny and its still the
first $100 billion brand in the world. Only one word comes to mind – Awesome..!
It is on one of these praise filled discussions about Google that we were having
at office that I was presented with the other side of this coin. People are
voicing an important concern here. Google is actually killing the entire
Software industry.
Now, that’s a very strong statement to make. But people are saying that and I
had to agree to some issues that they raised.
How will programmers like us would be fed if everything is available for FREE.
There is a difference between Open Source and FREE. Most of Google’s services
are FREE but not Open Source. Before GMail, I knew of many email service
providers that charged some money for bigger mailboxes. There was some kind of
business model being thought out for this free service. But Google immediately
disrupted it with there huge 1 GB mail boxes. Google Docs is a huge example that
could have created some healthy competition with other trying to build better
office services had Google Docs been a paid service. There is no more motivation
to write a competitive product for any of already Google provided FREE services.
Even as a Product Manager, when I think of some new idea, I am always stuck at
Business Model point since some similar or very close service is already
available for FREE with Google. Even if I innovate something with user
experience and some features for which I charge a premium, Google would easily
incorporate that into their already free service in no time and my product and
its business is already dead.
One cannot create exclusive and premium services with Ad monetization as the
only business model. There needs to go in extra efforts on the parts of creators
for creating something really extraordinary and remarkable that needs to be paid
for. Google is creating a sting of below par quality services with a sting of
bugs and issues (the recent Google Docs security loophole being an example) and
calling them BETA’s and giving it out for FREE. This is in one way or the other,
killing the software industry.
Google is already created a marketplace where Software industries are finding it
difficult to sell ‘Software as a Service’ (SAAS). Hardware companies are anyways
thriving as always, since it has to be bought for some price. It is analogical
to what the cassette recorders and DVD burners did to the music and movie
industry with fueling the piracy and making it cheaper to copy and sell rather
than people going for buying there own original stuff. While, Google is making
it very simple for the hardware companies with its FREE services for everything.
This is also leading to Google dominion in Software industry since only it makes
money by ads due to higher usage and brand recognition of its free services. At
the end – people/consumers are at loss.
Even we use Google Analytics and Google AdSense on this very blog. The Wordpress
blog software that we use here is again open source. The only money we paid was
the hosting space (physical) and domain name. And Google may soon change it if
they open up there Google apps service (hosting solutions) that provides free
hosting space for python based web apps. As soon as this starts supporting Java
and PHP, who would buy hosting space for simple blogs with minimal feature
requirements?
2 notes 0 Comments Tags: news software companies
Share1
Apr 5 '09
★
TATA
This post is written by: Dhaval Motghare (http://www.dhavalmotghare.com)
Tata Nano was launched recently to much fan fare, the response as expected was
pretty overwhelming to say the least so much so that Tata motors would be
conducting a lucky draw to decide who gets to buy one and who doesn’t, much the
same way it did way back in 1998 when the Indica was launched. Indica as you
know was Tata’s first proper passenger car unlike Sierra, Safari or Sumo which
were more of people or goods carriers. And Indica was a great success which
pulled back Tata from a loss of more than 500 crore’s from the previous year. I
was really proud back then about Tata’s accomplishment, proud that finally an
Indian company was making a world class car. Tata did a commendable job by
indigenously developing the Indica but sadly when it came to mass producing it,
they failed miserably. Everyone knows at least one person who has a Tata horror
story to tell. Shoddy built quality, overheating engines, parts falling off, air
conditioner or power windows that don’t work, huge panel gaps and the list goes
on. My sense of pride soon took a back seat but still I had some hope. I thought
Tata has just started its foray into the passenger car segment this is a pretty
nascent stage to form an opinion, but over years Tata has consistently failed to
deliver when it comes to quality and I might as well add the designers have also
managed to consistently churn out more and more ugly designs, Nano and the new
Indica vista being a proof of it.
So why is it so difficult for Tata to build a decent car? Ratan Tata doesn’t
seem like a person who would tolerate such a thing yet Tata continues to churn
out shoddily built cars day after day. Is it plain lethargy or just don’t care
attitude which allows this to continue. Or is it that it is cheaper to built low
quality cars because either way people buy it as long as the cars are cheap?
0 Comments Tags: tata indica tata nano companies
Share1
Mar 11 '09
★
POOR MAN’S GPS
This post is written by: Dhaval Motghare (http://www.dhavalmotghare.com)
This is regarding some interesting piece of code I found on the Internet. As a
requirement for one of my work projects I had to develop a location aware
application for a blackberry device. As always you need a GPS built in for the
same. You also have a option of using triangulation based on cell ID and tower
ID if the network carrier provides you with such a information, but generally it
is not available or you have to pay for it. But now you have a third option
“Google”.
What google has done is as a requirment for its maps application for handheld
devices it has created a huge database of cell ID, tower ID with a corresponding
mapping with latitude and longitude. As a consequence if you can now get cell ID
and tower ID for a particular device you could locate yourself without a GPS or
a need to pay for the service if your carrier provides it.
How to do this? Well this post helped me in figuring this out. As you could see
the post contains a way to fetch a lat/long values from an exposed google web
service. All you need to do is somehow get cell ID and tower ID for your device.
Java ME doesn’t have a specific API available for doing the same you could on
some devices get the cell ID and tower ID by querying through the
System.getProperty() method with a platform specific key.
For example on Nokia you could use
Series 40 3rd Edition, FP1 (or newer):
System.getProperty(“Cell-ID”)
S60 3rd Edition, FP2 (or newer):
System.getProperty(“com.nokia.mid.cellid”)
If the platform in question is a blackberry device it has a well documented API
for getting the cell information. The following code would tell you how to go
about it.
//#ifdef BLACKBERRY_8300try
{Class.forName("net.rim.device.api.system.GPRSInfo");Class.forName("net.rim.device.api.system.GPRSInfo.GPRSCellInfo");}
catch (Exception e) {e.printStackTrace();return false;}try
{deviceInfoObject.setCellID(GPRSInfo.getCellInfo().getCellId());deviceInfoObject.setARFCN(GPRSInfo.getCellInfo().getARFCN());deviceInfoObject.setBSIC(GPRSInfo.getCellInfo().getBSIC());deviceInfoObject.setLAC(GPRSInfo.getCellInfo().getLAC());deviceInfoObject.setRAC(GPRSInfo.getCellInfo().getRAC());deviceInfoObject.setGPRSState(GPRSInfo.getGPRSState());deviceInfoObject.setMCC(GPRSInfo.getCellInfo().getMCC());deviceInfoObject.setMNC(GPRSInfo.getCellInfo().getMNC());}
catch (Exception e) {e.printStackTrace();return false;}return true;
//#endif
After you have acquired the device info you could fetch lat/long values using
the exposed google service. You could find the following code helpful which I
ported to J2ME from the android specific code which could be found in the post I
mentioned above.
public boolean queryForCoordinates(DeviceInfo deviceInfo) {
String baseURL = "http://www.google.com/glm/mmap";// Setup the
connectionHttpConnection httpConnection = null;OutputStream outputStream =
null;DataInputStream inputStream = null;
try {
httpConnection = openConnection(baseURL);byte[] pd;if(deviceInfo.getCellID() <=
0 || deviceInfo.getLAC() <= 0)pd = PostData(0, 0, 3105, 20601, false);elsepd =
PostData(deviceInfo.getMCC(), deviceInfo.getMNC(), deviceInfo.getLAC(),
deviceInfo.getCellID(), false);
handler.processRequestHeaderForCoordinates(httpConnection);
httpConnection.setRequestProperty("content-length", pd.length + "");outputStream
= httpConnection.openOutputStream();outputStream.write(pd);outputStream.close();
DataInputStream dis = httpConnection.openDataInputStream();
// Read some prior datadis.readShort();dis.readByte();// Read the error-codeint
errorCode = dis.readInt();if (errorCode == 0) {double lat = (double)
dis.readInt() / 1000000D;double lng = (double) dis.readInt() / 1000000D;// Read
the rest of the datadis.readInt();dis.readInt();dis.readUTF();
deviceInfo.setLatitude(lat);deviceInfo.setLongitude(lng);
System.out.println("Lattitude --" + lat);System.out.println("Longitude --" +
lng);
} else {/* If the return code was not* valid or indicated an error,* we display
a Sorry-Notification */return false;}return true;} catch (Exception e)
{e.printStackTrace();return false;} finally {closeConnection(httpConnection,
outputStream, inputStream);}
}
private byte[] PostData(int MCC, int MNC, int LAC, int CID, boolean shortCID)
{/* The shortCID parameter follows heuristic experiences:* Sometimes UMTS CIDs
are build up from the original GSM CID (lower 4 hex digits)* and the RNC-ID left
shifted into the upper 4 digits.*/byte[] pd = new byte[]{0x00, 0x0e,0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,0x00, 0x00,0x00, 0x00,0x00, 0x00,0x1b,0x00,
0x00, 0x00, 0x00, // Offset 0x110x00, 0x00, 0x00, 0x00, // Offset 0x150x00,
0x00, 0x00, 0x00, // Offset 0x190x00, 0x00,0x00, 0x00, 0x00, 0x00, // Offset
0x1f0x00, 0x00, 0x00, 0x00, // Offset 0x230x00, 0x00, 0x00, 0x00, // Offset
0x270x00, 0x00, 0x00, 0x00, // Offset 0x2b(byte) 0xff, (byte) 0xff, (byte) 0xff,
(byte) 0xff,0x00, 0x00, 0x00, 0x00};
boolean isUMTSCell = ((long) CID > 65535);
if (isUMTSCell) {System.out.println("UMTS CID. {0} " + (shortCID ? "Using short
CID to resolve." : ""));} else {System.out.println("GSM CID given.");}if
(shortCID) {CID &= 0xFFFF;
1 note 0 Comments Tags: cell id gps tower id programming software
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Mar 2 '09
★
JAVA ANNOTATIONS: EXPLORED & EXPLAINED
One of the many wonderful features of Java 5 SE is the introduction of the
Annotations construct. Annotations are tags that we can insert into our program
source code for some tool to process it and make sense out of it. Annotations
processing tools generally use Reflection API (of Java 5 SE) to process the code
at source level on Java code or bytecode level to process the class files into
which the compiler has placed the annotations. Java Annotations are wonderfully
explained in many places around the web, but the only place where I could find a
sensible and complete example was a hard bound book by Prentice Hall
Publications named Core Java : Volume II - Advanced Features, authored by Cay S.
Horstmann and Gary Cornell. Almost all the places on web that try to explain
Annotations miss the most crucial part of showing us an Annotation Processing
Tool (APT) for our custom written annotations and the way to use it from our
code. I have used the information from the book to build some Annotations for
validating variables and initializing values in them from property files for my
project. My observation of the lack of examples over the www for writing custom
Java Annotations has motivated me to write this article. So, presenting to you a
sample custom Java Annotation to help you write your own Annotations for
whatever it is you may be doing.
I will take you through the NullValueValidate annotation whose purpose as its
name suggests is to validate the variable it annotates to be containing a non
null value. If it finds a null value while processing then it will throw a
NullPointerException. I] Declaring an AnnotationLets begin by declaring our
annotation. This declaration will be used by the code that intends to use the
annotation to annotate the variables in its object.
> package annotation.declaration;
> import java.lang.annotation.Documented;
> import java.lang.annotation.ElementType;
> import java.lang.annotation.Retention;
> import java.lang.annotation.RetentionPolicy;
> import java.lang.annotation.Target;
>
> /**
> * Null Value Validate is, as the name suggests an annotation to
> * validate whether the parameter is null or not
> * @author Y.Kamesh Rao
> *
> */
> @Documented
> @Target(ElementType.FIELD)
> @Retention(RetentionPolicy.RUNTIME)
>
> public @interface NullValueValidate {
> String paramName();
> }
Note the ’@’(AT) symbol in front of the ‘interface’ keyword. This is the syntax
used to declare an annotation. This is called an annotation interface. The
methods of the interface correspond to the elements of the annotation.
paramName() - This is the only element our annotation declaration consists of.
It stores the name of the annotated field to display it in a message while
processing. Note that the declaration looks like a function declaration.
Actually, that is what it is. @interface actually declares a Java interface
whose implementation is provided by the objects that use the annotation.
Annotation processors receive the objects that use/implement the annotation and
they call annotation interface methods to retrieve the annotation elements. In
our case, the NullValueValidateAnnotationProcessor would receive the object of
the class that has some fields annotated using the NullValueValidate annotation.
This processor would then call the paramName() method to retrieve the value of
this annotation element. We use 3 of the Java provided Annotations to annotate
the properties of our declaration. These are alternatively referred to as the
Built-In Annotations and are used for 'Annotating an Annotation’. (Well, there
are much tougher tongue twisters than this). @Documented - Indicates that the
annotation declaration has to be included while creating the docs for this
project using JavaDocs. By default, Annotations are excluded from the
documentation generated using the javadocs command. @Target - Indicates the
target elements in your java program to which the annotation shall be applied.
It can either the Field, Method, Class or the whole Package itself. Our
NullValueValidateannotation shall be applicable to only class fields. Here are
the possible values taken by this Enum -
* TYPE - Applied only to Type. A Type can be a Java class or interface or an
Enum or even an Annotation.
* FIELD - Applied only to Java Fields (Objects, Instance or Static, declared at
class level).
* METHOD - Applied only to methods.
* PARAMETER - Applied only to method parameters in a method definition.
* CONSTRUCTOR - Can be applicable only to a constructor of a class.
* LOCAL_VARIABLE - Can be applicable only to Local variables. (Variables that
are declared within a method or a block of code).
* ANNOTATION_TYPE - Applied only to Annotation Types.
* PACKAGE - Applicable only to a Package.
@Retention - Indicates the retention policy to be used for the annotation. In
simple words, for long would we retain the annotation. There are three possible
values -
* SOURCE - Annotations are to be discarded by the compiler.
* CLASS - Annotations are to be recorded in the class file by the compiler but
need not be retained by the VM at run time. This is the default behavior.
* RUNTIME - Annotations are to be recorded in the class file by the compiler
and retained by the VM at run time, so they may be read reflectively.
We have set the RetentionPolicy to be RUNTIME since we plan to process the
annotations at runtime of the program. @Target and @Retention are also called
Meta-Annotations. II] Annotation Processing Tool An annotation processor tool,
parses the object it receives and takes programmed actions on finding the
annotations it is processing in the object under scrutiny. Here is the
annotation processor for our previously declared annotation - NullValueValidate.
> package annotation.processor;
>
> import java.lang.annotation.Annotation;
> import java.lang.reflect.Field;
> import annotation.declaration.NullValueValidate;
>
> /**
> * The class file to actually carry out the validations
> * for the various validate annotations we have declared
> * @author Y.Kamesh Rao
> */
> public class NullValueValidateAnnotationProcessor {
> /**
> * Method to process all the annotations
> * @param obj The name of the object where
> * annotations are to be identified and
> * processed
> */
> public static void processAnnotations(Object obj) {
> try {
> Class cl = obj.getClass();
>
> // Checking all the fields for annotations
> for(Field f : cl.getDeclaredFields()) {
> // Since we are Validating fields, there may be many
> // NullPointer and similar exceptions thrown,
> // so we need to catch them
> try {
> // Processing all the annotations on a single field
> for(Annotation a : f.getAnnotations()) {
> // Checking for a NullValueValidate annotation
> if(a.annotationType() == NullValueValidate.class) {
> NullValueValidate nullVal = (NullValueValidate) a;
> System.out.println("Processing the field : "+ nullVal.paramName());
>
> // Setting the field to be accessible from our class
> // is it is a private member of the class under processing
> // (which its most likely going to be)
> // The setAccessible method will not work if you have
> // Java SecurityManager configured and active.
> f.setAccessible(true);
>
> // Checking the field for a null value and
> // throwing an exception is a null value encountered.
> // The get(Object obj) method on Field class returns the
> // value of the Field for the Object which is under test right now.
> // In other words, we need to send 'obj' as the object
> // to this method since we are currently processing the
> // annotations present on the 'obj' Object.
> if(f.get(obj) == null) {
> throw new NullPointerException("The value of the field "+f.toString()+" can't be NULL.");
> } else
> System.out.println("Value of the Object : "+f.get(obj));
> }
> }
> } catch(Exception e) {
> System.out.println(e.getMessage());
> e.printStackTrace();
> }
> }
> } catch(Exception e) {
> System.out.println(e.getMessage());
> e.printStackTrace();
> }
> }
> }
Most of the code is self explanatory with comments that it has. Please refer the
code for detailed understanding of the same. Basically, it has a static method
called processAnnotations that takes the object of the class which contains
annotations that need to be processed. We then use Java Reflection API to
process each of the Field in this received object parameter and take necessary
actions of null value validation whenever we find a NullValueValidate Annotation
on the field. If a null value is found, we throw the NullPointerException or we
print the value on the console.
III] Annotation UsagePlease refer the following code that uses the
NullValueValidate annotation that we just implemented. It also uses the
NullValueValidateAnnotationProcessorto process the declared annotations on its
field at runtime by calling it from its constructor. Also do note that the
annotations are used in a similar fashion as access modifiers like private or
public with the variable/field declarations. Usually a newline is entered for
better readability of the code. Else, the annotation can very well exist in the
same line as the variable/field declaration. The name of the annotation is
preceded by an ’@’(AT) symbol.
> package annotation;
>
> import annotation.declaration.NullValueValidate;
> import annotation.processor.NullValueValidateAnnotationProcessor;
>
> /** Main class to test the Annotations
> * @author Y.Kamesh Rao
> */
> public class AnnotationExample {
> @NullValueValidate(paramName = "testVar1") private String testVar1;
> @NullValueValidate(paramName = "testVar2") private String testVar2;
>
>
> public AnnotationExample() {
> testVar2 = "Testing the Null Value Validation...It Works...!";
>
> // Calling the processor to process the annotations applied
> // on this class object.
> NullValueValidateAnnotationProcessor.processAnnotations(this);
> }
>
> public static void main(String args[]) {
> AnnotationExample ae = new AnnotationExample();
> }
> }
IV] Output
> Processing the field:testVar1
> Value of the Object:Testing the Null Value Validation...It Works...!
> Processing the field:testVar2
> The value of the field private java.lang.String annotation.AnnotationExample.testVar2 cannot be NULL.
> java.lang.NullPointerException:The value of the field private java.lang.String annotation.AnnotationExample.testVar2 cannot be NULL.
> at annotation.processor.NullValueValidateAnnotationProcessor.processAnnotation(NullValueValidateAnnotationProcessor.java:66)
> at annotation.AnnotationExample.(AnnotationExample.java:28)
> at annotation.AnnotationExample.main(AnnotationExample.java:33)
V] Conclusion I had a lot of fun doing this sample annotation program and now I
have implemented many custom made Annotations to load properties from property
files, validations of database field lengths, etc. Annotations greatly reduces
the verbosity of the code thus making it much simpler and readable. Annotations
can be used for logging, generating code dependent deployment descriptors and
other mechanical and repetitive jobs. I had a lot of fun compiling this article
for you guys. I hope you benefit from it.
2 notes 4 Comments Tags: programming annotations java 5
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Feb 28 '09
★
LAPTOP POINTERS
This post is written by: Dhaval Motghare (http://www.dhavalmotghare.com)
Well a lot of people ask me about everything from a say a USB drive to Floor
standers while making a purchase, but lately it seems a lot many of them have a
laptop purchase on their mind. So for all those I have compiled a list of
pointers which one should look for when going for a laptop. Hope this helps.
To start with every thing at least in a laptop boils down to a size, weight and
battery life. You might not agree with me on this but believe me once you use
a laptop for a few months you would. Also never consider laptop a desktop
replacement, its not all about the money, you can buy a laptop powerful enough
to replace your desktop, but such a laptop would break your back when there is
need to carry it, it would weigh at least 4 kilos. Also a battery back up of
1-1.5 hrs is the max you would get from it. This is not what a laptop is for,
a laptop should weigh in the range of 1.5-2.7 kgs depending on budget, it should
give you a battery back up in the range of 2-5hrs. and should have a size which
is at least practical enough to carry around. So considering the above points I
have a few suggestions for the components that should go into a laptop.
First and the foremost the processor, avoid AMD at any cost they are cheap but
are not powerful and most importantly have a very high TDP rating (heat up a lot
and are a drain on the battery), consider the new core 2 duo series from Intel,
if possible avoid the 5xxx and 7xxx series and go for the 8xxx and 9xxx series
if the budget permits, if you are a little tight on budget go for the 7xxx
series, the new 8xxx and above series are from a new family (penryn) and built
on a 45 nm process so they are more efficient and have a lower TDP.
8100, 8300 or P8400 are a good choice.
Secondly the primary memory, 2 GB is decent enough, at most 3 GB, anything more
than that is waste of money since anything more than 3 GB lies unused. Rather
than getting more memory concentrate on the FSB speed, 800 MHz is a good choice,
but don’t go below 667 MHz.
Graphics - These days you do need to pay attention to graphics as well, and this
has nothing to do with gaming, most computers now come preloaded with windows
vista which has this unnecessary but nevertheless present UI enhancement like
Aero effect (transparent windows) and flip 3D (3D space based window switching)
which are heavy for onboard graphics, so for vista to run decently on your
system you need a graphics subsystem at least a little better than what on board
graphics has to offer. There are two choices nVidia and ATI (AMD), considering
the points I mentioned earlier you should avoid nVidia 9xxx series and go for
8xxx series, the two options available are 8400 and 8600, similarly form ATI
anything above 3400 is best avoided again for the aforementioned reasons.
As I said don’t use a laptop as a desktop replacement, so it goes without saying
that its best not to use laptops for gaming, but with the graphic cards I
mentioned earlier you could play most of the games at low resolutions.
Screen size - According to me at least you should avoid anything bigger than 15
inches, the ideal size being 13.3 inches, but again that’s your call, just
remember that the screen size is inversely proportional to weight and battery
life. You should also consider the new LCD displays which have a LED backlight,
again this are expensive but good for battery life.
Secondary memory - The capacity is entirely your call, but do consider what the
rpm is, the best bet is 5400 rpm anything below and the performance is affected
and anything above is taxing on battery life with no noticeable
improvement in performance.
Other miscellaneous details (Bluetooth, biometric security, camera etc) don’t
affect the either the size or the battery or weight but only the price so that’s
for you to decide, one more thing which is most important at least for me is
looks, more often than not I make suboptimal decisions which are purely
motivated by the looks of the product. So I am not the right person to go to if
looks are not important for you.
Still other things which maybe useful to some people are don’t expect too much
from the onboard speakers, if you do want to use your laptop as entertainment
device choose a laptop which has a blue ray drive with HDMI and optical out as
I/O ports, then pair them with a LCD display and a decent pair of speakers.
Regarding the brands available, avoid all Indian brands (HCL, Wipro, Zenith
etc), also avoid brands like (Compaq, Acer, LG, Samsung), the brands I trust are
Sony, Dell, HP, Toshiba, Fujitsu etc not necessarily in that order. One thing I
didn’t mention here was Apple, since apple has such a low penetration in India
or for that matter the whole world that it’s no brainer to avoid it. But it does
make some amazing products, the Mac book pro being one of them, it’s a
awesome laptop which comes preloaded with leopard and I must say here that once
you use leopard you would never use anything again, so if you are not put off by
the premium price apple commands do give it a shot.
22 notes 0 Comments Tags: hardware laptops gadgets
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Feb 24 '09
★
HELLO WORLD
Welcome to orangeapple.org..! We would collaborate here to mainly talk about
Apple and its amazing Products and Technologies. This Apple is Orange cause we
are coming to you, out of Nagpur in INDIA which is also famous to be the Orange
City. We will review and preview amazing Apple products like the MacBook, iMacs,
iPhone and iPods.
But more than Apple fanatics, we are tech geeks at heart and mind. This is one
of the reasons we appreciate and celebrate the sheer genius that goes into
making Apple products. We would speak and share about any tech stuff we may come
across and think that it deserves to be placed here.
Most of us here write software programs to eat those burgers and biryanis we
love. We program for the iPhone and iPod touch using the Cocoa Touch Framework,
for websites and desktops using Java and MySQL, for Mobiles using Symbian, J2ME,
Windows Mobile and BREW. Hence, you may also stumble upon posts about these
technologies, some sample code and solutions to common problems.
Expect from us -
1. Tech reviews and previews of various hardware and software products and
solutions
2. Code examples for Spring, Hibernate, SQL, Java, C, C++, Flex, Actionscript,
Javascript, CSS, Objective C, iPhone SDK and more
3. Tips and Tricks for Linux and Mac OSX
4. And a lot of hate stuff for Windows
You will see the posts coming in pretty soon. So check back or subscribe to the
RSS feed and be the part of ‘Think Different’ revolution.
0 Comments Tags: announcements news
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