A New Strategy of Language Pack Management for Wireless Apps

private BundleContext bc;

	

	public LPServiceImpl(BundleContext context) {

		bc = context;

	}



	public String getString(String key) {

		//Return the Bundle object for this context bundle.

		Bundle bd = bc.getBundle();

		//Get the LP name, which is the same as the Bundle name. 

		String bdName = (String) bd.getHeaders().get("Bundle-Name");

		

		//Get the resource bundle and invoke its getBundle method.

		ResourceBundle lpBD = ResourceBundle.getBundle(bdName);

		return lpBD.getString(key);

	}

}

public String getString(String key) {

	init();

	return lpSV.getString(key);

}



//initialize and install the required bundle.

private void init()

{

	//Reinstall LocaleData bundle if the baseName or the locale changes.

	if(reloadBundle)

	{

		if(this.lpBundle!=null){

			//Need to uninstall current Language Pack bundle

			ctx.ungetService(lpSR);

			try {

				lpBundle.uninstall();

			} catch (BundleException e) {

				e.printStackTrace();

			}

		}

			

		//Install LocaleData bundle from local runtime or remote SMF Server

		if(baseName == null )

		{

			System.out.println("You must specify the bundle name 

			                            and the resource base name");

		}else{

			try{

				//Install LocaleData bundle then start it. 

				String bName="smfbd:/" + baseName+"_" +

						this.locale.getLanguage() + "_" 

						+this.locale.getCountry();

				lpBundle = ctx.installBundle(bName);

				lpBundle.start();

				//Get the ServiceReference instance

				lpSR=locateResourceBundle();

				//Get the LPService instance

				lpSV = (LPService)ctx.getService(lpSR);

				reloadBundle=false;

			}catch(BundleException e)

			{

				e.printStackTrace();

			}

		}

	}else

	{

		System.out.println("Bundle has already installed");

	}

}



//Create ServiceReference instance for LocaleData Bundle.

private ServiceReference locateResourceBundle()

{

	try {

		//Get all available ServiceReference instances from run time.

		ServiceReference sr[]=ctx.getServiceReferences(svName,null);

		for(int i=0;i<sr.length;i++){

			//Get the target bundle comparing the bundle name.

			String key=(String)sr[i].getProperty("Bundle-Name");

			if(key.equals(this.baseName+"_"+this.locale.getLanguage()

			+"_"+this.locale.getCountry()))

				return sr[i];

		}

	} catch (InvalidSyntaxException e) {

		e.printStackTrace();

	}

	return null;

}

public void start(BundleContext context) throws Exception {

	System.out.println("starting invoker...");

	this.bc = context;

	//Get LPProxyService from the run time	

	ServiceReference ref = 

	 context.getServiceReference(LPProxyService.class.getName());

	proxy = (LPProxyService)context.getService(ref);

	

	//Initialize the LocaleData bundle by specifying the baseName and locale.

	proxy.setBaseName("LP");

	proxy.setLocale(new Locale("en", "US"));		

	//proxy.setLocale(new Locale("zh", "CN"));

		

	//Invoke proxy.getString method to read from the localization package.

	System.out.println("from invoker: "+proxy.getString("Hi") + ", ");

	System.out.println(getBundleName());			

}