urimatcher in android content provider

Question

I am new to Android. I went through the code of Android ContentProvider and I am a little bit confused with the UriMatcher because the statements within static will execute first. Here in the code inside UriMatcher there is a static block without having idea about PROVIDER_NAME. How can it use it because before PROVIDER_NAME is initialized the static block should run.

public class CustomContentProvider extends ContentProvider {

    public static final String PROVIDER_NAME = 
        "net.learn2develop.provider.Book";

     public static final Uri CONTENT_URI = 
        Uri.parse("content://"+ PROVIDER_NAME + "/books");

     public static final String _ID = "_id";
     public static final String TITLE = "title";
     public static final String ISBN = "isbn";

     private static final int BOOKS = 1;
     private static final int BOOK_ID = 2;   

     private static final UriMatcher uriMatcher;
     static {
        uriMatcher = new UriMatcher(UriMatcher.NO_MATCH);
        uriMatcher.addURI(PROVIDER_NAME, "books", BOOKS);
        uriMatcher.addURI(PROVIDER_NAME, "books/#", BOOK_ID);      
     }

any help is greatly accepted... thanks in advance

Answer 1

Static initialization code runs in textual order. This includes static fields as well as static blocks.

PROVIDER_NAME is therefore already initialized when the static block executes