Added class to simplify access to database of VPN profiles
This commit is contained in:
Tobias Brunner
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/*
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* Copyright (C) 2012 Tobias Brunner
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* Copyright (C) 2012 Giuliano Grassi
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* Copyright (C) 2012 Ralf Sager
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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package org.strongswan.android.data;
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import java.util.ArrayList;
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import java.util.List;
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import android.content.ContentValues;
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import android.content.Context;
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import android.database.Cursor;
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import android.database.SQLException;
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import android.database.sqlite.SQLiteDatabase;
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import android.database.sqlite.SQLiteOpenHelper;
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import android.util.Log;
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public class VpnProfileDataSource
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{
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private static final String TAG = VpnProfileDataSource.class.getSimpleName();
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public static final String KEY_ID = "_id";
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public static final String KEY_NAME = "name";
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public static final String KEY_GATEWAY = "gateway";
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public static final String KEY_USERNAME = "username";
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public static final String KEY_PASSWORD = "password";
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public static final String KEY_CERTIFICATE = "certificate";
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private DatabaseHelper mDbHelper;
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private SQLiteDatabase mDatabase;
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private final Context mContext;
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private static final String DATABASE_NAME = "strongswan.db";
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private static final String TABLE_VPNPROFILE = "vpnprofile";
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private static final int DATABASE_VERSION = 1;
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public static final String DATABASE_CREATE =
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"CREATE TABLE " + TABLE_VPNPROFILE + " (" +
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KEY_ID + " INTEGER PRIMARY KEY AUTOINCREMENT," +
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KEY_NAME + " TEXT NOT NULL," +
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KEY_GATEWAY + " TEXT NOT NULL," +
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KEY_USERNAME + " TEXT NOT NULL," +
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KEY_PASSWORD + " TEXT," +
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KEY_CERTIFICATE + " TEXT" +
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");";
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private final String[] ALL_COLUMNS = new String[] {
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KEY_ID,
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KEY_NAME,
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KEY_GATEWAY,
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KEY_USERNAME,
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KEY_PASSWORD,
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KEY_CERTIFICATE
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};
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private static class DatabaseHelper extends SQLiteOpenHelper
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{
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public DatabaseHelper(Context context)
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{
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super(context, DATABASE_NAME, null, DATABASE_VERSION);
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}
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@Override
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public void onCreate(SQLiteDatabase database)
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{
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database.execSQL(DATABASE_CREATE);
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}
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@Override
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public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)
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{
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Log.w(TAG, "Upgrading database from version " + oldVersion +
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" to " + newVersion + ", which will destroy all old data");
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db.execSQL("DROP TABLE IF EXISTS " + TABLE_VPNPROFILE);
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onCreate(db);
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}
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}
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/**
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* Construct a new VPN profile data source. The context is used to
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* open/create the database.
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* @param context context used to access the database
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*/
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public VpnProfileDataSource(Context context)
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{
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this.mContext = context;
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}
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/**
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* Open the VPN profile data source. The database is automatically created
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* if it does not yet exist. If that fails an exception is thrown.
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* @return itself (allows to chain initialization calls)
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* @throws SQLException if the database could not be opened or created
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*/
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public VpnProfileDataSource open() throws SQLException
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{
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if (mDbHelper == null)
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{
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mDbHelper = new DatabaseHelper(mContext);
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mDatabase = mDbHelper.getWritableDatabase();
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}
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return this;
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}
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/**
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* Close the data source.
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*/
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public void close()
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{
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if (mDbHelper != null)
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{
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mDbHelper.close();
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mDbHelper = null;
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}
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}
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/**
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* Insert the given VPN profile into the database. On success the Id of
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* the object is updated and the object returned.
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*
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* @param profile the profile to add
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* @return the added VPN profile or null, if failed
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*/
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public VpnProfile insertProfile(VpnProfile profile)
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{
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ContentValues values = ContentValuesFromVpnProfile(profile);
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long insertId = mDatabase.insert(TABLE_VPNPROFILE, null, values);
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if (insertId == -1)
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{
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return null;
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}
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profile.setId(insertId);
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return profile;
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}
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/**
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* Updates the given VPN profile in the database.
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* @param profile the profile to update
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* @return true if update succeeded, false otherwise
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*/
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public boolean updateVpnProfile(VpnProfile profile)
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{
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long id = profile.getId();
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ContentValues values = ContentValuesFromVpnProfile(profile);
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return mDatabase.update(TABLE_VPNPROFILE, values, KEY_ID + " = " + id, null) > 0;
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}
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/**
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* Delete the given VPN profile from the database.
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* @param profile the profile to delete
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* @return true if deleted, false otherwise
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*/
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public boolean deleteVpnProfile(VpnProfile profile)
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{
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long id = profile.getId();
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return mDatabase.delete(TABLE_VPNPROFILE, KEY_ID + " = " + id, null) > 0;
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}
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/**
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* Get a single VPN profile from the database.
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* @param id the ID of the VPN profile
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* @return the profile or null, if not found
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*/
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public VpnProfile getVpnProfile(long id)
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{
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VpnProfile profile = null;
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Cursor cursor = mDatabase.query(TABLE_VPNPROFILE, ALL_COLUMNS,
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KEY_ID + "=" + id, null, null, null, null);
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if (cursor.moveToFirst())
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{
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profile = VpnProfileFromCursor(cursor);
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}
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cursor.close();
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return profile;
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}
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/**
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* Get a list of all VPN profiles stored in the database.
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* @return list of VPN profiles
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*/
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public List<VpnProfile> getAllVpnProfiles()
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{
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List<VpnProfile> vpnProfiles = new ArrayList<VpnProfile>();
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Cursor cursor = mDatabase.query(TABLE_VPNPROFILE, ALL_COLUMNS, null, null, null, null, null);
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cursor.moveToFirst();
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while (!cursor.isAfterLast())
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{
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VpnProfile vpnProfile = VpnProfileFromCursor(cursor);
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vpnProfiles.add(vpnProfile);
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cursor.moveToNext();
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}
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cursor.close();
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return vpnProfiles;
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}
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private VpnProfile VpnProfileFromCursor(Cursor cursor)
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{
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VpnProfile profile = new VpnProfile();
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profile.setId(cursor.getLong(cursor.getColumnIndex(KEY_ID)));
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profile.setName(cursor.getString(cursor.getColumnIndex(KEY_NAME)));
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profile.setGateway(cursor.getString(cursor.getColumnIndex(KEY_GATEWAY)));
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profile.setUsername(cursor.getString(cursor.getColumnIndex(KEY_USERNAME)));
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profile.setPassword(cursor.getString(cursor.getColumnIndex(KEY_PASSWORD)));
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profile.setCertificateAlias(cursor.getString(cursor.getColumnIndex(KEY_CERTIFICATE)));
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return profile;
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}
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private ContentValues ContentValuesFromVpnProfile(VpnProfile profile)
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{
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ContentValues values = new ContentValues();
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values.put(KEY_NAME, profile.getName());
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values.put(KEY_GATEWAY, profile.getGateway());
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values.put(KEY_USERNAME, profile.getUsername());
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values.put(KEY_PASSWORD, profile.getPassword());
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values.put(KEY_CERTIFICATE, profile.getCertificateAlias());
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return values;
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}
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}
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