de.theappguys.winzigsql
Class WinzigDbScriptHelper

java.lang.Object
  android.database.sqlite.SQLiteOpenHelper
      de.theappguys.winzigsql.WinzigDbScriptHelper

public class WinzigDbScriptHelper
extends android.database.sqlite.SQLiteOpenHelper

Extension of SQLiteOpenHelper that handles initialization & upgrade of the database based on naming conventions for resources in the asset files. Works hand-in-hand with the WinzigDbProvider

Field Summary

static String

LOG_TAG

Constructor Summary

WinzigDbScriptHelper(android.content.Context context, String dbName, int dbVersion)
Let your custom db provider extends this class and call the superconstructor like so:

Method Summary

boolean	dropDb() Only for debugging purposes.
void	onCreate(android.database.sqlite.SQLiteDatabase db) (non-Javadoc)
void	onOpen(android.database.sqlite.SQLiteDatabase db) We override onOpen to enable foreign keys.
void	onUpgrade(android.database.sqlite.SQLiteDatabase db, int oldVersion, int newVersion) (non-Javadoc)

Methods inherited from class android.database.sqlite.SQLiteOpenHelper

close, getReadableDatabase, getWritableDatabase

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

LOG_TAG

public static final String LOG_TAG

See Also:

Constant Field Values

Constructor Detail

WinzigDbScriptHelper

public WinzigDbScriptHelper(android.content.Context context,
                            String dbName,
                            int dbVersion)

Let your custom db provider extends this class and call the superconstructor like so:

 private MyDbHelper(final Context context) {
     super (context, "myDbName", 42);
 }
 

Then, to obtain instances, implement a get Instance method like this:

 private static MyDbHelper instance = null;

 public static MyDbHelper(final Context context) {
     if (instance == null) {
         return (instance = new MyDbHelper(context))
     } else {
         return instance;
     }
 }
 

Method Detail

onCreate

public void onCreate(android.database.sqlite.SQLiteDatabase db)

(non-Javadoc)

Specified by:

onCreate in class android.database.sqlite.SQLiteOpenHelper

See Also:

SQLiteOpenHelper.onCreate(android.database.sqlite.SQLiteDatabase)

onUpgrade

public void onUpgrade(android.database.sqlite.SQLiteDatabase db,
                      int oldVersion,
                      int newVersion)

(non-Javadoc)

Specified by:

onUpgrade in class android.database.sqlite.SQLiteOpenHelper

See Also:

SQLiteOpenHelper.onUpgrade(android.database.sqlite.SQLiteDatabase, int, int)

onOpen

public void onOpen(android.database.sqlite.SQLiteDatabase db)

We override onOpen to enable foreign keys.

Overrides:

onOpen in class android.database.sqlite.SQLiteOpenHelper

dropDb

public boolean dropDb()

Only for debugging purposes.

Returns:

true: db was deleted.