TimelineProvider.java :  » Blog-Twitter » android-twitter-client-twironal » jp » inaka » mironal » android » twironal » content » Android Open Source

package jp.inaka.mironal.android.twironal.content;

import java.util.HashMap;

import jp.inaka.mironal.android.twironal.content.tweet.TweetContents;
import jp.inaka.mironal.android.twironal.content.tweet.TwitterOpenHelper;
import jp.inaka.mironal.android.twironal.content.user.UserContents;
import android.content.ContentProvider;
import android.content.ContentValues;
import android.content.UriMatcher;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteQueryBuilder;
import android.net.Uri;

public class TimelineProvider extends ContentProvider{

    private static final int TIMELINE = 1;
    
    private static UriMatcher URI_MATCHER;
    
    private static  HashMap<String,String > sTimelineProjectionMap;
    
    static {
        URI_MATCHER = new UriMatcher(UriMatcher.NO_MATCH);
        URI_MATCHER.addURI( TimelineContents.AUTHORITY
                    , TimelineContents.PATH
                    , TIMELINE);
        
        sTimelineProjectionMap = new HashMap<String, String>();
        sTimelineProjectionMap.put(TwitterOpenHelper.TWEET_TABLE 
                        +"."
                        +TimelineContents._ID,
                        TwitterOpenHelper.TWEET_TABLE
                        +"."
                        +TimelineContents._ID );
        sTimelineProjectionMap.put(TimelineContents.NAME, TimelineContents.NAME);
        sTimelineProjectionMap.put(TimelineContents.CREATE_AT, TimelineContents.CREATE_AT);
        sTimelineProjectionMap.put(TimelineContents.TWEET, TimelineContents.TWEET);
        sTimelineProjectionMap.put(TimelineContents.IMAGE, TimelineContents.IMAGE);
    }
    
    private TwitterOpenHelper mOpenHelper;
    
    
    @Override
    public int delete(Uri uri, String selection, String[] selectionArgs) {
        throw new UnsupportedOperationException("read onry.");
    }

    @Override
    public String getType(Uri uri) {
        // TODO \bhEX^u
        return null;
    }

    @Override
    public Uri insert(Uri uri, ContentValues values) {
        throw new UnsupportedOperationException("read onry.");
    }

    @Override
    public boolean onCreate() {
        mOpenHelper = new TwitterOpenHelper(getContext());
        return true;
    }

    @Override
    public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
            String sortOrder) {

        if( URI_MATCHER.match(uri) != TIMELINE ){
            throw new IllegalArgumentException();
        }
        
        SQLiteQueryBuilder qb = new SQLiteQueryBuilder();
        qb.setTables( TwitterOpenHelper.TWEET_TABLE
                    + " INNER JOIN "
                    + TwitterOpenHelper.USER_TABLE
                    + " ON ( "
                    + TwitterOpenHelper.TWEET_TABLE
                    + "."
                    + TweetContents.USER_ID
                    + " = "
                    + TwitterOpenHelper.USER_TABLE
                    + "."
                    + UserContents._ID
                    + ")" );

        qb.setProjectionMap(sTimelineProjectionMap);
        
        SQLiteDatabase db = mOpenHelper.getReadableDatabase();
        
        Cursor c = qb.query(db, projection, selection, selectionArgs, null, null, sortOrder);
        c.setNotificationUri(getContext().getContentResolver(), uri);
        return c;
    }

    @Override
    public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
        throw new UnsupportedOperationException("read onry.");
    }

    
    
}