Android Open Source - JiangHomeStyle_Android_Phone Database Helper

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Back to project page JiangHomeStyle_Android_Phone.

License

The source code is released under:

Apache License

Java Source Code

package com.cidesign.jianghomestylephone.db;
//w  w w  . j a va2  s .co  m
import java.sql.SQLException;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.util.Log;

import com.cidesign.jianghomestylephone.R;
import com.cidesign.jianghomestylephone.entity.ArticleEntity;
import com.cidesign.jianghomestylephone.entity.FileListEntity;
import com.j256.ormlite.android.apptools.OrmLiteSqliteOpenHelper;
import com.j256.ormlite.dao.Dao;
import com.j256.ormlite.dao.RuntimeExceptionDao;
import com.j256.ormlite.support.ConnectionSource;
import com.j256.ormlite.table.TableUtils;

public class DatabaseHelper extends OrmLiteSqliteOpenHelper
{

  // name of the database file for your application -- change to something
  // appropriate for your app
  private static final String DATABASE_NAME = "JiangStyle.db";
  // any time you make changes to your database objects, you may have to
  // increase the database version
  private static final int DATABASE_VERSION = 1;

  // the DAO object we use to access the SimpleData table
  private Dao<FileListEntity, Integer> fileListDao = null;
  private Dao<ArticleEntity, Integer> articleListDao = null;

  private RuntimeExceptionDao<FileListEntity, Integer> fileListRuntimeDao = null;
  private RuntimeExceptionDao<ArticleEntity, Integer> articleRuntimeDao = null;

  public DatabaseHelper(Context context)
  {
    super(context, DATABASE_NAME, null, DATABASE_VERSION, R.raw.ormlite_config);
  }

  /**
   * This is called when the database is first created. Usually you should
   * call createTable statements here to create the tables that will store
   * your data.
   */
  @Override
  public void onCreate(SQLiteDatabase db, ConnectionSource connectionSource)
  {
    try
    {
      Log.i(DatabaseHelper.class.getName(), "onCreate");
      TableUtils.createTable(connectionSource, FileListEntity.class);
      TableUtils.createTable(connectionSource, ArticleEntity.class);
    }
    catch (SQLException e)
    {
      Log.e(DatabaseHelper.class.getName(), "Can't create database", e);
      throw new RuntimeException(e);
    }
  }

  /**
   * This is called when your application is upgraded and it has a higher
   * version number. This allows you to adjust the various data to match the
   * new version number.
   */
  @Override
  public void onUpgrade(SQLiteDatabase db, ConnectionSource connectionSource, int oldVersion, int newVersion)
  {
    try
    {
      Log.i(DatabaseHelper.class.getName(), "onUpgrade");
      TableUtils.dropTable(connectionSource, FileListEntity.class, true);
      TableUtils.dropTable(connectionSource, ArticleEntity.class, true);
      // after we drop the old databases, we create the new ones
      onCreate(db, connectionSource);
    }
    catch (SQLException e)
    {
      Log.e(DatabaseHelper.class.getName(), "Can't drop databases", e);
      throw new RuntimeException(e);
    }
  }

  public Dao<FileListEntity, Integer> getFileListDao() throws SQLException
  {
    if (fileListDao == null)
    {
      fileListDao = getDao(FileListEntity.class);
    }
    return fileListDao;
  }

  public RuntimeExceptionDao<FileListEntity, Integer> getFileListDataDao()
  {
    if (fileListRuntimeDao == null)
    {
      fileListRuntimeDao = getRuntimeExceptionDao(FileListEntity.class);
    }
    return fileListRuntimeDao;
  }

  public Dao<ArticleEntity, Integer> getArticleListDao() throws SQLException
  {
    if (articleListDao == null)
    {
      articleListDao = getDao(ArticleEntity.class);
    }
    return articleListDao;
  }

  public RuntimeExceptionDao<ArticleEntity, Integer> getArticleListDataDao()
  {
    if (articleRuntimeDao == null)
    {
      articleRuntimeDao = getRuntimeExceptionDao(ArticleEntity.class);
    }
    return articleRuntimeDao;
  }

  /**
   * Close the database connections and clear any cached DAOs.
   */
  @Override
  public void close()
  {
    super.close();
    fileListRuntimeDao = null;
    articleRuntimeDao = null;
  }

}

Java Source Code List

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