Android Open Source - PomodoroTimer Pomodoro Content Provider

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License

The source code is released under:
GNU General Public License
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Java Source Code

package com.example.pomodorotimer;
//from   www  . jav  a 2 s.c  o  m
import android.content.ContentProvider;
import android.content.ContentResolver;
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;
import android.text.TextUtils;

//TODO: Logs. Javadoc.
/**
 * The Class PomodoroContentProvider. Implements ContentProvider for application.
 */
public class PomodoroContentProvider extends ContentProvider {

  /** The database. */
  private PomodoroTimerDBHelper database;

  /** The Constant POMODOROS. */
  private static final int POMODOROS = 10;
  
  /** The Constant TAGS. */
  private static final int TAGS = 20;
  
  /** The Constant POMODOROSTAGS. */
  private static final int POMODOROSTAGS = 30;

  /** The Constant AUTHORITY. */
  private static final String AUTHORITY = "com.example.pomodorotimer";

  /** The Constant POMODOROS_PATH. */
  private static final String POMODOROS_PATH = "pomodoros";
  
  /** The Constant TAGS_PATH. */
  private static final String TAGS_PATH = "tags";
  
  /** The Constant POMODOROSTAGS_PATH. */
  private static final String POMODOROSTAGS_PATH = "pomodorostags";
  
  /** The Constant CONTENT_URI_POMODOROS. */
  public static final Uri CONTENT_URI_POMODOROS = Uri.parse("content://"
      + AUTHORITY + "/" + POMODOROS_PATH);
  
  /** The Constant CONTENT_URI_TAGS. */
  public static final Uri CONTENT_URI_TAGS = Uri.parse("content://"
      + AUTHORITY + "/" + TAGS_PATH);
  
  /** The Constant CONTENT_URI_POMODOROSTAGS. */
  public static final Uri CONTENT_URI_POMODOROSTAGS = Uri.parse("content://"
      + AUTHORITY + "/" + POMODOROSTAGS_PATH);
  
  /** The Constant CONTENT_TYPE_POMODOROS. */
  public static final String CONTENT_TYPE_POMODOROS = ContentResolver.CURSOR_DIR_BASE_TYPE
      + "/pomodoros";
  
  /** The Constant CONTENT_TYPE_TAGS. */
  public static final String CONTENT_TYPE_TAGS = ContentResolver.CURSOR_DIR_BASE_TYPE
      + "/tags";
  
  /** The Constant CONTENT_TYPE_POMODOROSTAGS. */
  public static final String CONTENT_TYPE_POMODOROSTAGS = ContentResolver.CURSOR_DIR_BASE_TYPE
      + "/pomodorostags";

  /** The Constant sURIMatcher. */
  private static final UriMatcher sURIMatcher = new UriMatcher(
      UriMatcher.NO_MATCH);
  static {
    sURIMatcher.addURI(AUTHORITY, POMODOROS_PATH, POMODOROS);
    sURIMatcher.addURI(AUTHORITY, TAGS_PATH, TAGS);
    sURIMatcher.addURI(AUTHORITY, POMODOROSTAGS_PATH, POMODOROSTAGS);
  }

  /* (non-Javadoc)
   * @see android.content.ContentProvider#onCreate()
   */
  @Override
  public boolean onCreate() {
    database = new PomodoroTimerDBHelper(getContext());
    return false;
  }

  /* (non-Javadoc)
   * @see android.content.ContentProvider#query(android.net.Uri, java.lang.String[], java.lang.String, java.lang.String[], java.lang.String)
   */
  @Override
  public Cursor query(Uri uri, String[] projection, String selection,
      String[] selectionArgs, String sortOrder) {

    // Uisng SQLiteQueryBuilder instead of query() method
    SQLiteQueryBuilder queryBuilder = new SQLiteQueryBuilder();

    int uriType = sURIMatcher.match(uri);
    switch (uriType) {
    case POMODOROS:
      queryBuilder.setTables(PomodoroTimerDBContract.PomodorosTable.TABLE_NAME);
      break;
    case TAGS:
      queryBuilder.setTables(PomodoroTimerDBContract.TagsTable.TABLE_NAME);
      break;
    case POMODOROSTAGS:
      queryBuilder.setTables(PomodoroTimerDBContract.PomodorosTagsTable.TABLE_NAME);
      break;
    default:
      throw new IllegalArgumentException("Unknown URI: " + uri);
    }

    SQLiteDatabase db = database.getWritableDatabase();
    Cursor cursor = queryBuilder.query(db, projection, selection,
        selectionArgs, null, null, sortOrder);
    // Make sure that potential listeners are getting notified
    cursor.setNotificationUri(getContext().getContentResolver(), uri);

    return cursor;
  }

  /* (non-Javadoc)
   * @see android.content.ContentProvider#getType(android.net.Uri)
   */
  @Override
  public String getType(Uri uri) {
    return null;
  }

  /* (non-Javadoc)
   * @see android.content.ContentProvider#insert(android.net.Uri, android.content.ContentValues)
   */
  @Override
  public Uri insert(Uri uri, ContentValues values) {
    int uriType = sURIMatcher.match(uri);
    SQLiteDatabase sqlDB = database.getWritableDatabase();
    String uriPath = "";
    long id = 0;
    switch (uriType) {
    case POMODOROS:
      id = sqlDB.insert(PomodoroTimerDBContract.PomodorosTable.TABLE_NAME, null, values);
      uriPath = POMODOROS_PATH;
      break;
    case TAGS:
      id = sqlDB.insert(PomodoroTimerDBContract.TagsTable.TABLE_NAME, null, values);
      uriPath = TAGS_PATH;
      break;
    case POMODOROSTAGS:
      id = sqlDB.insert(PomodoroTimerDBContract.PomodorosTagsTable.TABLE_NAME, null, values);
      uriPath = POMODOROSTAGS_PATH;
      break;
    default:
      throw new IllegalArgumentException("Unknown URI: " + uri);
    }
    getContext().getContentResolver().notifyChange(uri, null);
    return Uri.parse(uriPath + "/" + id);
  }

  /* (non-Javadoc)
   * @see android.content.ContentProvider#delete(android.net.Uri, java.lang.String, java.lang.String[])
   */
  @Override
  public int delete(Uri uri, String selection, String[] selectionArgs) {
    int uriType = sURIMatcher.match(uri);
    SQLiteDatabase db = database.getWritableDatabase();
    int delCount = 0;
    switch (uriType) {
    case POMODOROS:
      delCount = db.delete(PomodoroTimerDBContract.PomodorosTable.TABLE_NAME, selection,
          selectionArgs);
      break;
    case TAGS:
      delCount = db.delete(PomodoroTimerDBContract.TagsTable.TABLE_NAME, selection,
          selectionArgs);
      break;
    case POMODOROSTAGS:
      delCount = db.delete(PomodoroTimerDBContract.PomodorosTagsTable.TABLE_NAME, selection,
          selectionArgs);
      break;
    default:
      throw new IllegalArgumentException("Unsupported URI: " + uri);
    }
    if (delCount > 0) {
      getContext().getContentResolver().notifyChange(uri, null);
    }
    return delCount;
  }

  /* (non-Javadoc)
   * @see android.content.ContentProvider#update(android.net.Uri, android.content.ContentValues, java.lang.String, java.lang.String[])
   */
  @Override
  public int update(Uri uri, ContentValues values, String selection,
      String[] selectionArgs) {

    int uriType = sURIMatcher.match(uri);
    SQLiteDatabase sqlDB = database.getWritableDatabase();
    int rowsUpdated = 0;
    switch (uriType) {
    case POMODOROS:
      if (TextUtils.isEmpty(selection)) {
        rowsUpdated = sqlDB.update(PomodoroTimerDBContract.PomodorosTable.TABLE_NAME,
            values, selection, selectionArgs);
      }
      break;
    case TAGS:
      if (TextUtils.isEmpty(selection)) {
        rowsUpdated = sqlDB.update(PomodoroTimerDBContract.TagsTable.TABLE_NAME,
            values, selection, selectionArgs);
      }
      break;
    case POMODOROSTAGS:
      if (TextUtils.isEmpty(selection)) {
        rowsUpdated = sqlDB.update(PomodoroTimerDBContract.PomodorosTagsTable.TABLE_NAME,
            values, selection, selectionArgs);
      }
      break;
    default:
      throw new IllegalArgumentException("Unknown URI: " + uri);
    }
    getContext().getContentResolver().notifyChange(uri, null);
    return rowsUpdated;
  }
}
Java Source Code List
