INFO-TECH

• They must have the knowledge of HTML5 and CSS3.They must know how to optimize images and graphics using CSS sprites.
• Must have the knowledge about Search engine optimization.
• Must know at what process the company will provide the designers in full time, part time or in hourly basis?
• At what cost the company will offer them with high quality assurance.
• Must know to offer Wordpress blog design and customization solutions in a short period of time.
• Must know the working methodologies and project management techniques followed by Wordpress designers for implementing Wordpress projects.
• Check out the Wordpress design portfolio of the Wordpress designer. It will help you to get detailed information about his or her experience, knowledge and expertise in WordPress designing.

This application allows to make call within app , after call completion User can get back to the running application.

// label for "Contact Number"
    UILabel *headerLbl = [[UILabel alloc]initWithFrame:CGRectMake(20,105,100,40)];
    headerLbl.text = @"Contact # :";
    headerLbl.textAlignment = UITextAlignmentCenter;
    headerLbl.backgroundColor = [UIColor clearColor];
    [self.view addSubview:headerLbl];
    [headerLbl release];

    compPhoneHead = [[UIButton alloc]initWithFrame:CGRectMake(133,105,146,39)];
    UIColor *background_Color = [UIColor colorWithPatternImage:[UIImage imageNamed:@"phoneNoButton.png"]];
    compPhoneHead.backgroundColor = background_Color;
    [compPhoneHead addTarget:self action:@selector(callAlert) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:compPhoneHead];
    
    compPhone = [[UILabel alloc]initWithFrame:CGRectMake(120,115,193,20)];
    compPhone.backgroundColor = [UIColor clearColor];
    compPhone.font = [UIFont fontWithName:@"Times New Roman" size:15];
    compPhone.text = @"(012)345-6789";
    compPhone.textColor = [UIColor blackColor];
    compPhone.textAlignment = UITextAlignmentCenter;
    [self.view addSubview:compPhone];

Phone Number on screen

Following code is used to implement the Calling functionality.

-(void)callAlert{

   alert =  [[UIAlertView alloc] initWithTitle:@"Message" message:@"Are you sure to make Call" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:@"Cancel", nil];
    [alert show];
    [alert release];
}
// alert view delegate
- (void) alertView:(UIAlertView *)alertV clickedButtonAtIndex:(NSInteger)buttonIndex
{
    if (buttonIndex == 0 && alertV==alert){     
        [self makeCall];
    }
}
// method to make call if “OK” button is clicked on AlertView
-(void)makeCall{
    
    NSLog(@"this is calling phone");
    NSString *phoneNumber = [NSString stringWithFormat:@"tel:%@",compPhone.text];
    phoneNumber = [phoneNumber stringByReplacingOccurrencesOfString:@"(" withString:@""];
    phoneNumber = [phoneNumber stringByReplacingOccurrencesOfString:@") " withString:@"-"];
    phoneNumber = [phoneNumber stringByReplacingOccurrencesOfString:@" " withString:@""];
    NSURL *phoneUrl = [[NSURL alloc] initWithString:phoneNumber];

Opening an app within another app is managed in iOS through the "url scheme" mechanism. If an app defines an url scheme and this scheme is public, then we can use it to run the app. Basic rule is to first check that the device supports that scheme like we cannot make a phone call on an iPad because the phone app is not supported on iPad). If the scheme is supported then we can call it. This concept is used in making call through app.

  // Check If device is able to make a call or not

    if([[UIApplication sharedApplication] canOpenURL:phoneUrl]) {
        NSURLRequest *phoneRequest = [NSURLRequest requestWithURL:phoneUrl];
        UIWebView *phoneWebView = [[UIWebView alloc]init];
        [phoneWebView loadRequest:phoneRequest]; 
    } else {
        
        // do something else, e.g. inform the user that he/she cannot open the app
        UIAlertView *alerts = [[UIAlertView alloc] initWithTitle:@"Message" message:@"Unable to make Call" delegate:self cancelButtonTitle:@"Ok" otherButtonTitles: nil];
        [alerts show];
        [alerts release];
    }
}

For enabling export of chart at client-side, we'll need to assemble the following elements: Note:Here, we assume that you have been able to generate the chart for your page.

⇒ The chart itself embedded using Fusion Charts JavaScript class inside FusionCharts.js.
⇒ Fusion Charts Export Component - This is named FCExporter.swf.
⇒ Fusion Charts Export Component JavaScript class - This JavaScript class is inside js file named FusionChartsExportComponent.js.

1. Including java script  class in your page:
 <script type="text/javascript" src="js/FusionCharts.js"></script>
<script type="text/javascript"  src="js/FusionChartsExportComponent.js"></script>

2. create an instance of the export component in your page using the following JavaScript code:

//Initialize Batch Exporter with DOM Id as fcBatchExporter
var myExportComponent = new FusionChartsExportObject('fcBatchExporter', "swf/FCExporter.swf");
//Add the charts to queue. The charts are referred to by their DOM Id.
                    myExportComponent.sourceCharts = ['myChartId1'];
  //Chenge the message  
myExportComponent.componentAttributes.defaultExportFileName = 'Column2D Chart';
 //Render the exporter SWF in our DIV fcexpDiv
                myExportComponent.Render("fcexpDiv");
                myExportComponent.BeginExport();
//Display coverscreen and exporter div
function displayscreen(){
                document.getElementById('cover_screen').style.display='block';
                document.getElementById('fcexpDiv1').style.display='block';
            }


3. Draw the chart and export it:

// apply Cover screen
<div class="cover_screen" style="display:none;" id="cover_screen"></div>
        <div id="fcexpDiv1" class="ExportContainer" align="center">
// Div where the export chart is rendered
              <div id="fcexpDiv"> Area for FusionCharts Export  </div> </div>
       
//Div where the chart is shown
<div id="chart1div" style="z-index:-15000;" align="center">The chart will appear within this DIV. This text will be replaced by the chart.</div>
// Java Script for chart
        <script type="text/javascript">
 var myChart1 = new FusionCharts("swf/Column2D.swf", "myChartId1", "350", "300", "0", "1");
 var data=    "<chart yAxisName='Sales Figure' caption='Top 5 Sales Person' numberPrefix='$'                                    
                       useRoundEdges='1' bgColor='FFFFFF,FFFFFF' showBorder='0'exportDialogColor='e1f5ff' 
                       exportDialogBorderColor='0372ab' exportDialogFontColor='0372ab' 
                      exportDialogPBColor='0372ab' exportEnabled='1' exportAtClient='1'"
      data += "exportHandler='fcBatchExporter'>”           
      data +  =  "<set label='Alex' value='25000'/>" 
     data +   = "<set label='Mark' value='35000'/>"
            data+= "<set label='David' value='42300'/>"
            data+= "<set label='Graham' value='35300'/>"
            data+= "<set label='John' value='31300'/>"
            data+= "</chart>"
            myChart1.addParam("wmode", "opaque");
            myChart1.setDataXML(data);
            myChart1.render("chart1div");
        </script>
        <input type="image" src="image/export.gif" id='one' Click="initiateExport();"/>

Chart with export button

capturing the image

Save image

The Contacts Database is divided into 3 tables which are contacts, raw contacts and data.
⇒ Each table contains column (_ID) which is an auto incremented primary key.
⇒ Data table contains all the contact info like phone number, mail id, address etc.
⇒ User cannot add any data into contacts table. The data in this table is populated internally.
⇒ The RawContacts table contains all the actual contact created .Hence we use the raw contacts while retrieve contacts.

Uri uri=RawContacts.CONTENT_URI;
String projection [] = new String[]{ RawContacts.CONTACT_ID,RawContacts.ACCOUNT_TYPE,RawContacts.DISPLAY_NAME_PRIMARY };
Here RawContacts.CONTACT_ID is the id of the row in ContactsContract.Contacts table that this raw Contact belongs to. 

Raw contacts are linked to contacts by the aggregation process which can be controlled by AGGREGATION_MODE field.

String selection=RawContacts.ACCOUNT_TYPE+ “=?”;
String selectionArgs[]=new String[]{“any account name which type contact you want to retrieve like for 
retrieve Google contacts you have to specify “com.google”};
String sortOrder=ContactsContract.Display_Name;

Now create cursor using these parameters.

Cursor cursor=getContentResolver.query(uri, projection, selection, selectionArgs, sortOrder);
Now all the requested column and their value in cursor now and we can get those value from the cursor like this.
While (cursor.moveToNext()) {
 int contactId=cursor.getInt(cursor.getColumnIndex(RawContacts.CONTACT_ID));
 String contactName = cursor.getString(cursor.getColumnIndex(RawContacts.DISPLAY_NAME_PRIMARY);
String accountType = cursor.getString(cursor.getColumnIndex(RawContacts.ACCOUNT_TYPE);
}

So now we get only Google contacts but if we put selectionArgs=null then we get all the existing contact of device.

How to get Sim contact details  from android device?

⇒ In this we have to take different Uri to get sim contact detail. 
⇒ The name of the column where sim contact name and contact number are exists names are “name” and “number”. 
 
Uri uri=Uri.parse (“content://icc/and”);
String projection [] = null;
String selection = null;
String selectionArgs [] = null;
String sortOrder = null;
Cursor simCursor= getContentResolver.query (uri, projection, selection, selectionArgs, sortOrder);
While (simCursor.moveToNext()) {
 String simContactName=simCursor.getString(simCursor.getColumnIndex(“name”));
 String simContactNumber=simCursor.getString(simCursor.getColumnIndex(“number”));
   simContactNumber.replaceAll (“\\D”,””);
simContactNumber.replaceAll (“&”,””);
 }
So now we get sim contact number and contact name.

Get Contacts

In oracle to get next or previous 12 months from specified month of year, below is a procedure which accept two parameter year and month name.

CREATE OR REPLACE PROCEDURE dbo.GET_MONTHS(
PERIOD_YEAR     IN  VARCHAR2,
PERIOD_MONTH    IN  VARCHAR2
)
AS
MONTH_STR1          VARCHAR2(2000);
MONTH_STR2          VARCHAR2(2000);
V_MONTH_DIGIT       NUMBER;
V_PERIOD_YEAR       NUMBER;
P_PERIOD_YEAR       NUMBER;

BEGIN

    SELECT TO_NUMBER(TO_CHAR(TO_DATE(PERIOD_MONTH,'MON'),'MM'),'99')
    INTO V_MONTH_DIGIT FROM DUAL;
    V_PERIOD_YEAR := TO_CHAR(TO_NUMBER(PERIOD_YEAR,'9999')+1,'9999');    
    P_PERIOD_YEAR := TO_CHAR(TO_NUMBER(PERIOD_YEAR,'9999')-1,'9999');
    FOR LP IN 0..11
    LOOP
         IF LP<V_MONTH_DIGIT-1 THEN
            MONTH_STR2 := MONTH_STR2 || TO_CHAR(ADD_MONTHS('1-JAN-'||PERIOD_YEAR,LP),'MON')||'-'||PERIOD_YEAR||',';
            MONTH_STR1 := MONTH_STR1 || TO_CHAR(ADD_MONTHS('1-JAN-'||PERIOD_YEAR,LP),'MON')||'-'||V_PERIOD_YEAR||',';             
        ELSE
            MONTH_STR2 := MONTH_STR2 || TO_CHAR(ADD_MONTHS('1-JAN-'||PERIOD_YEAR,LP),'MON')||'-'||P_PERIOD_YEAR||',';
            MONTH_STR1 := MONTH_STR1 || TO_CHAR(ADD_MONTHS('1-JAN-'||PERIOD_YEAR,LP),'MON')||'-'||PERIOD_YEAR||','; 
        END IF;
    END LOOP;
    
    MONTH_STR1 := substr(MONTH_STR1,0,length(MONTH_STR1)-1);
    MONTH_STR2 := substr(MONTH_STR2,0,length(MONTH_STR2)-1);
    
    DBMS_OUTPUT.PUT_LINE('Next 12 Months :'||MONTH_STR1);
    DBMS_OUTPUT.PUT_LINE('Previous 12 Months :'||MONTH_STR2);
       EXCEPTION 
        WHEN NO_DATA_FOUND THEN
            NULL;
        WHEN OTHERS THEN
            RAISE;

END GET_MONTHS; 

Parameters :
 
PERIOD_YEAR: Year from which we get next or previous year
PERIOD_MONTH: Month from which we get next or previous month
In the procedure firstly we get the passed month in numeric format in local variable V_MONTH_DIGIT. After that we execute a loop for generate months and store in local variables MONTH_STR1 and MONTH_STR2.

To execute procedure: EXEC GET_MONTHS('2007','APR');

Output:

Using UIImagePicker Photo Browsing in Application is possible.

 UIImageView  *empImage = [[UIImageView alloc] init];
    UIImage *im = [UIImage imageNamed:@"ImagePlaceholder.png"];
    [empImage setImage:im]; 
empImage.frame =  CGRectMake(60, 40, 200, 200);
    [self.view addSubview:empImage];
    
    //Choose Image button 
    UIButton  *showImage = [[UIButton alloc]init];
    UIImage *Image = [UIImage imageNamed:@"browseButton.png"];
    [showImage setBackgroundImage:Image forState:UIControlStateNormal];
    [showImage addTarget:self action:@selector(getPhoto:)
showImage.frame = CGRectMake(62,250,96,33); forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:showImage];
    
    //Caputure Image button
    UIButton  *captureImage = [[UIButton alloc]init];
    UIImage *Image1 = [UIImage imageNamed:@"captureButton.png"];
    [captureImage setBackgroundImage:Image1 forState:UIControlStateNormal];
    [captureImage addTarget:self action:@selector(capturePicture:) forControlEvents:UIControlEventTouchUpInside];
captureImage.frame = CGRectMake(162,250,96,33);
    [self.view addSubview:captureImage];

PlaceHolder for Image and browse

Browse button opens the phone gallery where Images are saved.

   // method for “showImage” button
-(IBAction) getPhoto:(id) sender {
 UIImagePickerController * picker = [[[UIImagePickerController alloc] init]autorelease];
 picker.delegate = self;
 
 if((UIButton *) sender == choosePhotoBtn) {
  picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
 } else {
  picker.sourceType = UIImagePickerControllerSourceTypeCamera;
 }
 
 [self presentModalViewController:picker animated:YES];
}

Browse Image

   // method for “captureImage” button 
-(IBAction)capturePicture:(id)sender{
    
    if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
        UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Message" message:@"Unable to Capture image" delegate:self cancelButtonTitle:@"Ok" otherButtonTitles: nil];
        [alert show];
        [alert release];
    }else{
        // if capture image is not supported by the device or Stimaulator
        UIImagePickerController* imagePickerController = [[[UIImagePickerController alloc]init]autorelease];
        imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
        imagePickerController.delegate = self;
        imagePickerController.allowsEditing = YES;
        [self presentModalViewController:imagePickerController animated:YES];
    }   
}

Capture Button opens iPhone Camera and Stores in Application Directory

// delegate  imagePickerController
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
 [picker dismissModalViewControllerAnimated:YES];
 imageView.image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
}

The UIImagePickerController class manages customizable, system-supplied user interfaces for taking pictures and movies on supported devices, and for choosing saved images and movies for use in your app. An image picker controller manages user interactions and delivers the results of those interactions to a delegate object.

Delegates to be included in .h file : <UIImagePickerControllerDelegate,UIPopoverControllerDelegate> Frameworks required in the Application : UIKit.framework, Foundation.framework, CoreGraphics.framework

Loaded Image

In struts2 we can define validation using xml file. In struts2 for validation rules has classes and all classes implements validator interface.

Struts Action 2 relies on a validation framework provided by XWork to enable the application of input validation rules to your Actions before they are executed. Struts2 Validation Framework allows us to separate the validation logic from actual Java/JSP code, where it can be reviewed and easily modified later.

Validation framework comes with set of useful routines to handle form validation automatically and it can handle both server side as well as client side form validation. If certain validation is not present, you can create your own validation logic by implementing java interface.

Examples:
⇒required
For ‘required’ rule the class name is RequiredFieldValidator, for ‘int’ the class name is IntRangeFieldValidator
If we want to create our own validator class then our class should also implements validator interface. Validator 
interface is given in com.opensymphony.xwork2.validators.*. This rule verify whether user entered value is null 
or not, here we cannot pass any parameters.
Example:
 <field name="uname">
   <field-validator type="required">
        <message> User name is mandatory </message>
   </field-validator>
</field>


⇒requiredstring
This will validates whether the input entered is a valid string or not we can pass a parameter called trimto this 
rule. Trim will removes extra space from left and right sides of given word.
Example:
<field name="uname">
   <field-validator type="requiredstring">
        <param name="true">true</param>
        <message> you must enter string value </message>
   </field-validator>
</field>

⇒stringlength
This rule validates whether the given input is with in the given range of characters or not.  This rule is the combination 
of both min, max length rules. To this rule we can pass either both parameters min length and max length or any one of 
the paramenters.
Example:
<field name="uname">
   <field-validator type="requiredstring">
        <param name="minLength">8</param>
        <param name="maxLength">12</param>
        <message> user name should be with in ${minLength} and ${maxLength} characters </message>
   </field-validator>
</field>

⇒int
This rule verifies whether the given input value is with in the given range of integer or not, To this rule we need to pass 
min, max parameters.
Example:
<field name="uname">
   <field-validator type="int">
        <param name="min">25</param>
        <param name="max">35</param>
        <message>Age should be in between ${min} and ${max} </message>
   </field-validator>
</field>
Note: Actually ‘double‘ also same as int, but we need to pass the parameters minInclusive,maxInclusive

⇒double
Double field validator check whether given input is double or not .
fieldName - The field name this validator is validating. Required if using in-Validator Syntax otherwise not required
minInclusive - the minimum inclusive value in FloatValue format specified by Java language (if none is specified, it will be checked)
maxInclusive - the maximum inclusive value in FloatValue format specified by Java language (if none is specified, it will be checked)
minExclusive - the minimum exclusive value in FloatValue format specified by Java language (if none is specified, it will be checked)
maxExclusive - the maximum exclusive value in FloatValue format specified by Java language (if none is specified, it will be checked)
Example:
<validators>
          <!-- Plain Validator Syntax -->
          <validator type="double">
              <param name="fieldName">percentage</param>
              <param name="minInclusive">20.1</param>
              <param name="maxInclusive">50.1</param>
              <message>Age needs to be between ${minInclusive} and MaxInclusive} (inclusive)</message>
          </validator>

          <!-- Field Validator Syntax -->
          <field name="percentage">
              <field-validator type="double">
                  <param name="minExclusive">0.123</param>
                  <param name="maxExclusive">99.98</param>
                  <message>Percentage needs to be between ${minExclusive}
 ${maxExclusive} (exclusive)</message>
              </field-validator>
          </field>
     </validators>


⇒date
This will validate whether the given input date is with in the range of the dates or not, we need to pass min, 
max parameters to this rule. When we enter the date values then the format to be followed is dd-mm-yyyy
Example:
<field name="dob">
   <field-validator type="date">
        <param name="min">01/01/2011</param>
        <param name="max">01/01/2020</param>
        <message>year should be in between ${min} and ${max} </message>
   </field-validator>
</field>
And email, url are simple just like required, we no need to pass any parameters hope you are good.

⇒fieldexpression
In struts 1.x, with validator frame work we can do only per field validations, i mean we can validate field by field.  
But here in struts 2.x we can do the between field validations also with this fieldexpression rule. Actually if we want 
to do between fields in struts 1.x, we must do manually but here we can do this via framework validator framework which 
supports both per-field and between filed validations also. To work with this rule we must pass one parameter named 
‘expression‘ between field means, we can compare the current entered value with any one of above field.
Example:
<field name="myDateOfBirth">
   <field-validator type="fieldexpression">
        <param name="expression">
           <! [ CDATA[#myDateOfBirth < #myFatherBirth]] >            
         </param>
         <message>Your Birth date must be less then your father dob</message>
   </field-validator>
</field>
Note: here #myFatherBirth is other field name
⇒email
This rule validates whether the given input in the correct format or not.
Example:
<field name="email">
    <field-validator type="requiredstring">
        <message key="errors.required" />
   </field-validator>
   <field-validator type="email">
            <message key="errors.invalid" />
        </field-validator>
    </field>

⇒url
This rule validates whether the given input in the correct format or not.
Example:
<field name="fblink">
        <field-validator type="url">
        <message>Please enter a valid url</message>
        </field-validator>
</field>
⇒regex
Validates a string field using a regular expression.
Example:
<field name="userId">
<field-validator type="requiredstring">
 <message>Employee Id is a mandatory field</message>
  </field-validator>
   <field-validator type="regex">
   <param name="expression">
   <![CDATA[([E][m][p][0-9][0-9][0-9])]]>
   </param>
  <message>Valid Employee Id required e.g. Emp001</message>
 </field-validator>
</field>

One point that needs to be made clear is that performance tuning is not an exact science - you can't always predict that a certain tactic or technique will improve performance. Every change has to be tested, because it may improve performance in one area, it may also degrade performance in another area. Adding an index is a classic example of this - it may improve query performance but the performance of inserts and deletes become slower because the index entries also have to be updated.

You also need to be aware that improving response time is not the only aim that you might have - you might want to reduce memory usage instead - which might mean having to redesign or rewrite some stored procedures. All these issues need to be considered before you start looking at performance.

Validation framework comes with set of useful routines to handle form validation automatically and it can handle both server side as well as client side form validation. If certain validation is not present, you can create your own validation logic by implementing java interface.

Causes of Poor Performance

One cause of poor performance is high Oracle communication overhead. Oracle must process SQL statements one at a time. Another cause of poor performance is inefficient SQL statements. Because SQL is so flexible, you can get the same result using two different statements. Using one statement might be less efficient.

The first statement is slower because it does a time-consuming full scan of the EMP table for every department number in the DEPT table. Even if the DEPTNO column in EMP is indexed, the index is not used because the subquery lacks a WHERE clause naming DEPTNO.

Another cause of poor performance is unnecessary parsing and binding. Recall that before executing a SQL statement, Oracle must parse and bind it. Parsing means examining the SQL statement to make sure it follows syntax rules and refers to valid database objects. Binding means associating host variables in the SQL statement with their addresses so that Oracle can read or write their values.

The Oracle automatic performance tuning features include:

• They maintain the quality throughout the project to ensure faster delivery.
• Their main focus is on clients requirements to give them the satisfaction.
• Investment is not required from your end.
• Dedicated and experienced developers working for you.
• They work for 24 * 7.
• Trust worthiness and reliability.
• They deliver the best work on time under supervision.
• Technical support and direct communication.

1. Effective range : 10 m
2. Working Time : 6-7 Hours
3. Supported Profiles : HSP, HFP, A2DP, AVRCP

iBall-Groovy Main Pannel

Playback Interface

Blue LED

• Simple and Slim design 
• Nice audio quality 
• Mic works absolutely fine , with clarity
• affordable price

Author: Ashish Garg

The struts2 framework makes it easy to share certain solutions using an "Interceptor" strategy. When you request a resource that maps to an "action", the framework invokes the Action object. But, before the Action is executed, the invocation can be intercepted by another object. After the Action executes, the invocation could be intercepted again. Unsurprisingly, we call these objects "Interceptors."

Interceptors can execute code before and after an Action is invoked. Most of the framework's core functionality is implemented as Interceptors. Features like double-submit guards, type conversion, object population, validation, file upload, page preparation, and more, are all implemented with the help of Interceptors. Each and every Interceptor is pluggable, so you can decide exactly which features an Action needs to support.

Interceptors can be configured on a per-action basis. Your own custom Interceptors can be mixed-and-matched with the Interceptors bundled with the framework. Interceptors "set the stage" for the Action classes, doing much of the "heavy lifting" before the Action executes

Strtus2 provide some default interceptor but developer can create his own interceptor as per requirement. Below is an configuration of interceptor in struts configuration file.

<package name="default" extends="struts-default">
   <interceptors>
       <interceptor name="timer" class=".."/>
       <interceptor name="logger" class=".."/>
   </interceptors>
   <action name="login"
      class="tutorial.Login">
        <interceptor-ref name="timer"/>
        <interceptor-ref name="logger"/>
         <result name="input">login.jsp</result>
         <result name="success"
            type="redirectAction">/secure/home</result>
   </action>
</package>

User Defined Interceptor

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import org.apache.commons.lang.xwork.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts2.StrutsStatics;

/**
 *
 * @author Ashish Garg
 */
public class LoginInterceptor extends AbstractInterceptor implements StrutsStatics {

    private static final Log log = LogFactory.getLog(LoginInterceptor.class);
    private static final String USER_HANDLE = "USER_ID";
    private static final String LOGIN_ATTEMPT = "loginAttempt";

    @Override
    public void init() {
        log.info("Intializing LoginInterceptor");
        System.out.println("Intializing LoginInterceptor");
    }

 public String intercept(ActionInvocation invocation) throws Exception {

        final ActionContext context = invocation.getInvocationContext();
        HttpServletRequest request = (HttpServletRequest) context.get(HTTP_REQUEST);
        HttpSession session = request.getSession(true);

        // Is there a "user" object stored in the user's HttpSession?
        Object user = session.getAttribute(USER_HANDLE);
        if (user == null) {
            // The user has not logged in yet.

            // Is the user attempting to log in right now?
            String loginAttempt = request.getParameter(LOGIN_ATTEMPT);

            /* The user is attempting to log in. */
            if (!StringUtils.isBlank(loginAttempt)) {
                return invocation.invoke();
            }
            return "login";
        } else {
            return invocation.invoke();
        }
    }
}

Struts-Configuration For User Defined Login Interceptor

<struts>
    <!-- Configuration for the default package. -->
    <package name="default" namespace="/" extends="struts-default">
        <interceptors>
            <interceptor class="com.Garg.Action.LoginInterceptor" name="loginInterceptor">
            </interceptor>
            <interceptor-stack name="loginStack">
                <interceptor-ref name="loginInterceptor"/>
                <interceptor-ref name="defaultStack"/>
            </interceptor-stack>
        </interceptors>
        <default-interceptor-ref name="loginStack"></default-interceptor-ref>
        <global-results>
            <result name="login" type="redirect">Login</result>
        </global-results>
        <action name="Login" class="com.Garg.Action.LoginAction">
            <interceptor-ref name="loginStack"></interceptor-ref>
            <result name="success">/jsp/ViewJSP.jsp</result>
            <result name="input">/jsp/Login.jsp</result>
        </action>
          </package>
    </struts>

Free GPS apps are about a dozen in the iPhone app store, but, surprisingly, there aren’t a lot of free iPhone compass apps out there. This Compass App can be very useful and can be integrated with various other applications dealing with Map and Directions to know the current proceeding magnetic direction. Driver related apps can make a best use of it. This app can also be used for fun sake.

The iPhone Compass app, works like actual magnetic needle compass. Launch the Compass app by tapping its button "Compass Direction", and it shows you the magnetic direction you're facing.

// code for allocing "Compass Direction" button
    btnCompass= [UIButton buttonWithType:UIButtonTypeRoundedRect];
    [btnCompass setTitle:@"Compass Direction" forState:UIControlStateNormal];
    [btnCompass addTarget:self action:@selector(showCompass) forControlEvents:UIControlEventTouchUpInside];
    btnCompass.frame = CGRectMake(20, 350, 280, 30);
    [self.view addSubview:btnCompass];

// method to proceed for CompassViewController
-(void)showCompass{
    NSLog(@"going to call show Compass");    
    [UIView beginAnimations:@"View Flip" context:nil];
    [UIView setAnimationDuration:1.0];
    [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
    [UIView setAnimationBeginsFromCurrentState:YES];
    [UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:self.navigationController.view cache:NO];
    CompassViewController *compassViewController = [[[CompassViewController alloc]initWithNibName:@"CompassViewController" bundle:nil]
autorelease];
    [self.navigationController pushViewController:compassViewController animated:YES];
    [UIView commitAnimations];
}

Compass Button

In CompassViewController, viewDidLoad accommodates the following code. It makes use of CLLocationManager(and its delegate ) which 

helps to get direction for magnetic needle

//Compass Image View
    imgCompassView = [[UIImageView alloc]initWithFrame:CGRectMake(20,90,280,280)];
    [imgCompassView setImage:[UIImage imageNamed:@"compassImg.png"]];
    [self.view addSubview:imgCompassView];
    imgCompassView.center = CGPointMake(160, 230);
    
    //Needle Image View 
    imgNeedle = [[UIImageView alloc]initWithFrame:CGRectMake(152,140,16,93)];
    [imgNeedle setImage:[UIImage imageNamed:@"directionArrow.png"]];
    [self.view addSubview:imgNeedle];
    //imgNeedle.center = CGPointMake(160, 230);
    
    //ManagerLocation 
    location_Manager = [[CLLocationManager alloc] init];
    location_Manager.desiredAccuracy = kCLLocationAccuracyBest;
    location_Manager.delegate = self;
    location_Manager.distanceFilter = kCLDistanceFilterNone;
    [location_Manager startUpdatingHeading];

The needle pointer that shows you where the magnetic direction you're facing.

CLLocationManagerDelegate:
/*---------- getting Direction Angle -------------*/
-(void)locationManager:(CLLocationManager *)manager didUpdateHeading:(CLHeading *)newHeading{
    //[location_Manager stopUpdatingHeading];
    NSLog(@"New magnetic heading %f",newHeading.magneticHeading);
    [imgCompassView setTransform:CGAffineTransformMakeRotation(2*M_PI*newHeading.magneticHeading/360)];
}
/*----------------- End of above task ----------------*/
 

newHeading.magneticHeading co ordinate helps to move the needle pointer.

Show Compass

Just for fun or for some application need, java provides functionality to play audio file. This is inbuilt in java and do not need any additional library. Following is simple code to play an wav file in java.

 package play_audio;

import java.io.File;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.SourceDataLine;

/**
 *
 * @author Yusata Infotech
 */
public class play_audio {
 public static void main(String[] args) {

        try {
            System.out.println("Start");
            File f = new File("d://wavs//beep-1.wav");
            AudioInputStream audio = AudioSystem.getAudioInputStream(f);
            AudioFormat format;
            format = audio.getFormat();
            SourceDataLine auline;
            DataLine.Info info = new DataLine.Info(SourceDataLine.class, format);
            auline = (SourceDataLine) AudioSystem.getLine(info);
            auline.open(format);
            auline.start();
            int nBytesRead = 0;
            byte[] abData = new byte[524288];
            while (nBytesRead != -1) {
                nBytesRead = audio.read(abData, 0, abData.length);
                if (nBytesRead >= 0) {
                    auline.write(abData, 0, nBytesRead);
                }
            }
        } catch (Exception E) {
            System.out.println(E.getMessage());

        }
    }
}

A barcode is an optical machine-readable representation of data. The data which it represents, can be get back by machine reading it. Originally barcodes represented data by varying the widths and spacing of parallel lines, and may be referred to as linear or 1D barcode. Today there are number of barcodes used for many a purposes.

In Java, we may need to generate a barcode for some particular string. The generated barcode can be used for printing labels etc. Following is an example of generating barcode from java using ZXing api of google. It is open source api which can be used for generating barcodes for several types. Following is simple java program to generate various barcode(code128, QRCode and pdf417(Mostly used on drivers license in USA)) using ZXing.

package barcode;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.Writer;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.oned.Code128Writer;
import com.google.zxing.pdf417.encoder.PDF417Writer;
import com.google.zxing.qrcode.QRCodeWriter;
import java.io.File;
import java.io.FileOutputStream;

/**
 *
 * @author Yusata Infotech
 */
public class Barcode {
 public static void main(String[] args) {
        BitMatrix bitMatrix;
        Writer writer = new QRCodeWriter();
        try {
//  Write Barcode
            bitMatrix = new Code128Writer().encode("123456789", BarcodeFormat.CODE_128, 150, 80, null);
            MatrixToImageWriter.writeToStream(bitMatrix, "png", new FileOutputStream(new File("D://code128_123456789.png")));
            System.out.println("Code128 Barcode Generated.");
//  Write QR Code
            bitMatrix = writer.encode("123456789", BarcodeFormat.QR_CODE, 200, 200);
            MatrixToImageWriter.writeToStream(bitMatrix, "png", new FileOutputStream(new File("D://qrcode_123456789.png")));
            System.out.println("QR Code Generated.");
//  Write PDF417
            writer = new PDF417Writer();
            bitMatrix = writer.encode("123456789", BarcodeFormat.PDF_417, 80, 150);
            MatrixToImageWriter.writeToStream(bitMatrix, "png", new FileOutputStream(new File("D://pdf417_123456789.png")));
            System.out.println("PDF417 Code Generated.");
        } catch (Exception e) {
            System.out.println("Exception Found." + e.getMessage());
        }

    }
}

QRCode



Code128



PDF417

Download ZXing Library here