ClassyFy sample application demonstrates a ContentProvider which provides custom search suggestions that are created from the ClassyFy application data. The suggestions are produced by a fast text search query engine from the classyandroid project. The UML diagram on the right shows the classes which make the ClassyFy ContentProvider implementation. Here is a summary of what these classes contribute to this implementation:

• ClassyFyProvider

  Extends android.content.ContentProvider and delegates everything to ClassySearchEngine. Note a ContentProvider may be initialized before onCreate() is called on the Application object specified in AndroidManifest.xml. Hence there is a defensive measure to delay initialization of the ContentProvider implementation.

• ClassySearchEngine

  Implements classyandroid abstract class SearchEngineBase. The overriden method void onCreate(SQLiteOpenHelper sqLiteOpenHelper) initiates the FTS Engine startup and provides the persistence unit SQLiteOpenHelper shared by both itself and the FTS Engine.

• SearchEngineBase

  Delegate for all queries, including search suggestions. A convention for UriMatcher IDs is applied to distinguish between Search Suggestion Uris and others.

• FtsEngine

  Fast Text Search database and query support. It is customizable with regards to column mapping, sorting and filtering of text.