Android Open Source - AndroidMessenger Account Provider

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Back to project page AndroidMessenger.

License

The source code is released under:

GNU General Public License

Java Source Code

/**
 * @author - Zachary Goldberg @ 2008/*www .j  ava  2 s  . com*/
 */
package com.penn.cis121.androidmessenger.accountprovider;

import java.util.HashMap;
import java.util.List;


import android.content.ContentProvider;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.UriMatcher;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.database.sqlite.SQLiteQueryBuilder;
import android.net.Uri;
import android.text.TextUtils;
import android.util.Log;

public class AccountProvider extends ContentProvider {
  
  /* Constants */
  private static final String TAG = "AccountProvider";
    private static final String DATABASE_NAME = "accountprovider.db";
    private static final int DATABASE_VERSION = 2;
  private static final int ACCOUNT = 0;
  private static final int ACCOUNTS = 1;
    
  
  /* Private Variables */
  private static UriMatcher URL_MATCHER;
  private SQLiteDatabase mDB;
  private static HashMap<String, String> ACCOUNTS_PROJECTION_MAP;
  
  static {
    URL_MATCHER = new UriMatcher(UriMatcher.NO_MATCH);
    URL_MATCHER.addURI("com.penn.cis121.androidmessenger.accountprovider", "accounts", ACCOUNTS);
    URL_MATCHER.addURI("com.penn.cis121.androidmessenger.accountprovider", "accounts/#", ACCOUNT);
    ACCOUNTS_PROJECTION_MAP = new HashMap<String, String>();
    ACCOUNTS_PROJECTION_MAP.put(AccountInfo.Account._ID, "_id");
    ACCOUNTS_PROJECTION_MAP.put(AccountInfo.Account.USERNAME, "username");
    ACCOUNTS_PROJECTION_MAP.put(AccountInfo.Account.PASSWORD, "password");
    ACCOUNTS_PROJECTION_MAP.put(AccountInfo.Account.CLASSNAME, "classname");
  }
  
  public AccountProvider() {
    super();
  }

  @Override
  public String getType(Uri uri) {
    switch (URL_MATCHER.match(uri)) {
    case ACCOUNTS:
      return "vnd.android.cursor.dir/vnd.google.account";

    case ACCOUNT:
      return "vnd.android.cursor.item/vnd.google.account";
    default:
      throw new IllegalArgumentException("Unknown URL " + uri);
    }
  }

  private static class DatabaseHelper extends SQLiteOpenHelper{

    @Override
    public void onCreate(SQLiteDatabase db) {
      db.execSQL("CREATE TABLE accounts (_id INTEGER PRIMARY KEY,"
          + "username TEXT," + "password TEXT," + "className TEXT);");
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
      Log.w(TAG, "Upgrading database from version " + oldVersion + " to "
          + newVersion + ", which will destroy all old data");
      db.execSQL("DROP TABLE IF EXISTS accounts");
      onCreate(db);
    }
  }

  @Override
  public boolean onCreate() {
    DatabaseHelper dbHelper = new DatabaseHelper();
    mDB = dbHelper.openDatabase(getContext(), DATABASE_NAME, null,
        DATABASE_VERSION);
    return (mDB == null) ? false : true;
  }

  @Override
  public Cursor query(Uri uri, String[] projection, String selection,
        String[] selectionArgs, String sortOrder) {
    SQLiteQueryBuilder qb = new SQLiteQueryBuilder();

    switch (URL_MATCHER.match(uri)) {
    case ACCOUNTS:
      qb.setTables("accounts");
      qb.setProjectionMap(ACCOUNTS_PROJECTION_MAP);
      break;

    case ACCOUNT:
      qb.setTables("accounts");
      qb.appendWhere("_id=" + uri.getPathSegments().get(1));
      break;

    default:
      throw new IllegalArgumentException("Unknown URL " + uri);
    }

    // If no sort order is specified use the default
    String orderBy;  
    orderBy = AccountInfo.Account.DEFAULT_SORT_ORDER;

    Cursor c = qb.query(mDB, projection, selection, selectionArgs, "",
        "", orderBy);
    c.setNotificationUri(getContext().getContentResolver(), uri);
    return c;
  }

  @Override
  public Uri insert(Uri url, ContentValues initialValues) {
    long rowID;
    ContentValues values;
    if (initialValues != null) {
      values = new ContentValues(initialValues);
    } else {
      values = new ContentValues();
    }

    if (URL_MATCHER.match(url) != ACCOUNTS) {
      throw new IllegalArgumentException("Unknown URL " + url +"," + URL_MATCHER.match(url) + "," + ACCOUNTS);
    }

    rowID = mDB.insert("accounts", "account", values);
    if (rowID > 0) {          
      Uri uri = ContentUris.appendId(AccountInfo.Account.CONTENT_URI.buildUpon(),rowID).build();
      getContext().getContentResolver().notifyChange(uri, null);
      return uri;
    }

    throw new SQLException("Failed to insert row into " + url);
  }

  @Override
  public int delete(Uri url, String where, String[] whereArgs) {
    int count;
    long rowId = 0;
    switch (URL_MATCHER.match(url)) {
    case ACCOUNTS:
      count = mDB.delete("accounts", where, whereArgs);
      break;

    case ACCOUNT:
      List<String> segments = url.getPathSegments();
      String segment = segments.get(1);
      rowId = Long.parseLong(segment);
      count = mDB.delete("accounts",
          "_id="
              + segment
              + (!TextUtils.isEmpty(where) ? " AND (" + where
                  + ')' : ""), whereArgs);
      break;

    default:
      throw new IllegalArgumentException("Unknown URL " + url);
    }

    getContext().getContentResolver().notifyChange(url, null);
    return count;
  }

  @Override
  public int update(Uri url, ContentValues values, String where,
      String[] whereArgs) {
    int count;
    switch (URL_MATCHER.match(url)) {
    case ACCOUNTS:
      count = mDB.update("accounts", values, where, whereArgs);
      break;

    case ACCOUNT:
      
      List<String> segment = url.getPathSegments();
      count = mDB.update("accounts", values,
          "_id="
              + segment
              + (!TextUtils.isEmpty(where) ? " AND (" + where
                  + ')' : ""), whereArgs);
      break;

    default:
      throw new IllegalArgumentException("Unknown URL " + url);
    }

    getContext().getContentResolver().notifyChange(url, null);
    return count;
  }
}

Java Source Code List

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