Jersey Client In Android With Protocol Buffer

I would like to create a Jersey client in Android using protocol buffer. I am using the following libraries: jersey-client-1.8.jar jersey-core-1.8.jar protobuf-java-2.4.0a.jar The

Solution 1:

An addition... When trying to POST with the version of Buscador at the previous link it complained with some errors. The new version of Buscador that works for POSTing is the following,

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;

import com.sun.jersey.spi.service.ServiceFinder;
import com.sun.jersey.spi.service.ServiceFinder.DefaultServiceIteratorProvider;
import com.sun.jersey.spi.service.ServiceFinder.ServiceIteratorProvider;

publicclassBuscador<T> extendsServiceIteratorProvider<T>
{
private static final HashMap<String, String[]> SERVICES = new HashMap<String, String[]>();

private static final String[] com_sun_jersey_spi_HeaderDelegateProvider = new String[] {
        "com.sun.jersey.core.impl.provider.header.LocaleProvider",
        "com.sun.jersey.core.impl.provider.header.EntityTagProvider",
        "com.sun.jersey.core.impl.provider.header.MediaTypeProvider",
        "com.sun.jersey.core.impl.provider.header.CacheControlProvider",
        "com.sun.jersey.core.impl.provider.header.NewCookieProvider",
        "com.sun.jersey.core.impl.provider.header.CookieProvider",
        "com.sun.jersey.core.impl.provider.header.URIProvider",
        "com.sun.jersey.core.impl.provider.header.DateProvider",
        "com.sun.jersey.core.impl.provider.header.StringProvider"

};
private static final String[] com_sun_jersey_spi_inject_InjectableProvider = new String[] {
        "com.sun.jersey.core.impl.provider.xml.SAXParserContextProvider",
        "com.sun.jersey.core.impl.provider.xml.XMLStreamReaderContextProvider",
        "com.sun.jersey.core.impl.provider.xml.DocumentBuilderFactoryProvider",
        "com.sun.jersey.core.impl.provider.xml.TransformerFactoryProvider"
};
private static final String[] javax_ws_rs_ext_MessageBodyReader = new String[] {
        "com.sun.jersey.core.impl.provider.entity.StringProvider",
        "com.sun.jersey.core.impl.provider.entity.ByteArrayProvider",
        "com.sun.jersey.core.impl.provider.entity.FileProvider",
        "com.sun.jersey.core.impl.provider.entity.InputStreamProvider",
        "com.sun.jersey.core.impl.provider.entity.DataSourceProvider",
        "com.sun.jersey.core.impl.provider.entity.RenderedImageProvider",
        "com.sun.jersey.core.impl.provider.entity.MimeMultipartProvider",
        "com.sun.jersey.core.impl.provider.entity.FormProvider",
        "com.sun.jersey.core.impl.provider.entity.FormMultivaluedMapProvider",
        "com.sun.jersey.core.impl.provider.entity.XMLRootElementProvider$App",
        "com.sun.jersey.core.impl.provider.entity.XMLRootElementProvider$Text",
        "com.sun.jersey.core.impl.provider.entity.XMLRootElementProvider$General",
        "com.sun.jersey.core.impl.provider.entity.XMLJAXBElementProvider$App",
        "com.sun.jersey.core.impl.provider.entity.XMLJAXBElementProvider$Text",
        "com.sun.jersey.core.impl.provider.entity.XMLJAXBElementProvider$General",
        "com.sun.jersey.core.impl.provider.entity.XMLListElementProvider$App",
        "com.sun.jersey.core.impl.provider.entity.XMLListElementProvider$Text",
        "com.sun.jersey.core.impl.provider.entity.XMLListElementProvider$General",
        "com.sun.jersey.core.impl.provider.entity.ReaderProvider",
        "com.sun.jersey.core.impl.provider.entity.DocumentProvider",
        "com.sun.jersey.core.impl.provider.entity.SourceProvider$StreamSourceReader",
        "com.sun.jersey.core.impl.provider.entity.SourceProvider$SAXSourceReader",
        "com.sun.jersey.core.impl.provider.entity.SourceProvider$DOMSourceReader",
        "com.sun.jersey.core.impl.provider.entity.XMLRootObjectProvider$App",
        "com.sun.jersey.core.impl.provider.entity.XMLRootObjectProvider$Text",
        "com.sun.jersey.core.impl.provider.entity.XMLRootObjectProvider$General",
        "com.sun.jersey.core.impl.provider.entity.EntityHolderReader"
};
private static final String[] javax_ws_rs_ext_MessageBodyWriter = new String[] {
        "com.sun.jersey.core.impl.provider.entity.StringProvider",
        "com.sun.jersey.core.impl.provider.entity.ByteArrayProvider",
        "com.sun.jersey.core.impl.provider.entity.FileProvider",
        "com.sun.jersey.core.impl.provider.entity.InputStreamProvider",
        "com.sun.jersey.core.impl.provider.entity.DataSourceProvider",
        "com.sun.jersey.core.impl.provider.entity.RenderedImageProvider",
        "com.sun.jersey.core.impl.provider.entity.MimeMultipartProvider",
        "com.sun.jersey.core.impl.provider.entity.FormProvider",
        "com.sun.jersey.core.impl.provider.entity.FormMultivaluedMapProvider",
        "com.sun.jersey.core.impl.provider.entity.XMLRootElementProvider$App",
        "com.sun.jersey.core.impl.provider.entity.XMLRootElementProvider$Text",
        "com.sun.jersey.core.impl.provider.entity.XMLRootElementProvider$General",
        "com.sun.jersey.core.impl.provider.entity.XMLJAXBElementProvider$App",
        "com.sun.jersey.core.impl.provider.entity.XMLJAXBElementProvider$Text",
        "com.sun.jersey.core.impl.provider.entity.XMLJAXBElementProvider$General",
        "com.sun.jersey.core.impl.provider.entity.XMLListElementProvider$App",
        "com.sun.jersey.core.impl.provider.entity.XMLListElementProvider$Text",
        "com.sun.jersey.core.impl.provider.entity.XMLListElementProvider$General",
        "com.sun.jersey.core.impl.provider.entity.ReaderProvider",
        "com.sun.jersey.core.impl.provider.entity.DocumentProvider",
        "com.sun.jersey.core.impl.provider.entity.StreamingOutputProvider",
        "com.sun.jersey.core.impl.provider.entity.SourceProvider$SourceWriter"
};

static
{
    SERVICES.put("com.sun.jersey.spi.HeaderDelegateProvider",
        com_sun_jersey_spi_HeaderDelegateProvider);
    SERVICES.put("com.sun.jersey.spi.inject.InjectableProvider",
        com_sun_jersey_spi_inject_InjectableProvider);
    SERVICES.put("javax.ws.rs.ext.MessageBodyReader", javax_ws_rs_ext_MessageBodyReader);
    SERVICES.put("javax.ws.rs.ext.MessageBodyWriter", javax_ws_rs_ext_MessageBodyWriter);
}

DefaultServiceIteratorProvider defaultServiceIteratorProvider = new ServiceFinder.DefaultServiceIteratorProvider();

@SuppressWarnings("unchecked")@Overridepublic Iterator<Class<T>> createClassIterator(Class<T> service, String serviceName,
    ClassLoader loader, boolean ignoreOnClassNotFound)
{
    String[] classesNames = SERVICES.get(serviceName);

    System.out.println("!!!!!!!!!!!! serviceName: " + serviceName + " !!!!!!!!!!!!!!!!!!!");

    if(classesNames==null)
    {
        return defaultServiceIteratorProvider.createClassIterator(service, serviceName, loader, ignoreOnClassNotFound);
    }

    int length = classesNames.length;
    ArrayList<Class<T>> classes = new ArrayList<Class<T>>(length);
    for (int i = 0; i < length; i++)
    {
        try
        {
            classes.add((Class<T>) Class.forName(classesNames[i]));
        } catch (ClassNotFoundException e)
        {
            e.printStackTrace();
        }
    }
    //return null;return classes.iterator();
}

@Overridepublic Iterator<T> createIterator(Class<T> service, String serviceName, ClassLoader loader,
    boolean ignoreOnClassNotFound)
{
    String[] classesNames = SERVICES.get(serviceName);
    int length = classesNames.length;
    ArrayList<T> classes = new ArrayList<T>(length);
    for (int i = 0; i < length; i++)
    {
        try
        {
            classes.add(service.cast(Class.forName(classesNames[i]).newInstance()));
        } catch (IllegalAccessException e)
        {
            e.printStackTrace();
        } catch (InstantiationException e)
        {
            e.printStackTrace();
        } catch (ClassNotFoundException e)
        {
            e.printStackTrace();
        }
    }
    return classes.iterator();
}

}

Solution 2:

I employed the solution offered at,

java.lang.NullPointerException on Android

as proposed by

Lucas Ventura, Aug 25, 2010; 9:15am

and it worked like a charm.

[EDIT] Well, small comment/correction. Running in an HTC phone, caused the app to destroy/create when i minimised (not sure if this is normal) and re-opened. The solution proposed mandates that the Jersey client object and the ServiceFinder setting should occur in a static context. This should give a clue,

privatestaticfinal BaseRestClient client; 
static { 
    client = BaseRestClient.create("", ""); // just a helper class
    ServiceFinder.setIteratorProvider(newBuscador());
} 

Otherwise, the class loading fix complains in a rather strange way. Hope this helps someone...

Cheers!