Android Open Source - LitePal Lite Pal Open Helper

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright (C)  Tony Green, Litepal Framework Open Source Project
 */*w  w  w .jav a 2s .  c  o m*/
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.litepal.tablemanager;

import org.litepal.LitePalApplication;
import org.litepal.util.SharedUtil;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;

/**
 * The database helper to generate and manage the tables. It will automate
 * create or upgrade the database file depends on the parameters passed in.
 * 
 * LitePal makes it easy for managing tables. It used the dynamic features of
 * Java with reflection API to achieve that. Developers won't need to write
 * their own SQL for managing tables, LitePal will do that for them. Developers
 * just need to write their model classes and add right associations. LitePal
 * will take all the rest job to manager tables in database.
 * 
 * @author Tony Green
 * @since 1.0
 */
class LitePalOpenHelper extends SQLiteOpenHelper {
  public static final String TAG = "LitePalHelper";

  /**
   * The standard constructor for SQLiteOpenHelper.
   * 
   * @param context
   *            To use to open or create the database.
   * @param name
   *            The database file.
   * @param factory
   *            To use for creating cursor objects, or null for the default
   *            version number of the database (starting at 1); if the
   *            database is older, onUpgrade.
   * @param version
   *            (SQLiteDatabase, int, int) will be used to upgrade the
   *            database; if the database is newer,
   *            onDowngrade(SQLiteDatabase, int, int) will be used to
   *            downgrade the database
   */
  LitePalOpenHelper(Context context, String name, CursorFactory factory, int version) {
    super(context, name, factory, version);
  }

  /**
   * A simple constructor for SQLiteOpenHelper with null for CursorFactory as
   * default.
   * 
   * @param context
   *            To use to open or create the database.
   * @param name
   *            The database file.
   * @param version
   *            (SQLiteDatabase, int, int) will be used to upgrade the
   *            database; if the database is newer,
   *            onDowngrade(SQLiteDatabase, int, int) will be used to
   *            downgrade the database
   */
  LitePalOpenHelper(String dbName, int version) {
    this(LitePalApplication.getContext(), dbName, null, version);
  }

  @Override
  public void onCreate(SQLiteDatabase db) {
    Generator.create(db);
  }

  @Override
  public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    Generator.upgrade(db);
    SharedUtil.updateVersion(newVersion);
  }

}

Java Source Code List

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