| /* |
| * Copyright (C) 2007 The Android Open Source Project |
| * |
| * 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 com.example.android.notepad; |
| |
| import com.example.android.notepad.NotePad.Notes; |
| |
| import android.content.ContentProvider; |
| import android.content.ContentUris; |
| import android.content.ContentValues; |
| import android.content.Context; |
| import android.content.UriMatcher; |
| import android.content.res.Resources; |
| import android.database.Cursor; |
| import android.database.SQLException; |
| import android.database.sqlite.SQLiteDatabase; |
| import android.database.sqlite.SQLiteOpenHelper; |
| import android.database.sqlite.SQLiteQueryBuilder; |
| import android.net.Uri; |
| import android.provider.LiveFolders; |
| import android.text.TextUtils; |
| import android.util.Log; |
| |
| import java.util.HashMap; |
| |
| /** |
| * Provides access to a database of notes. Each note has a title, the note |
| * itself, a creation date and a modified data. |
| */ |
| public class NotePadProvider extends ContentProvider { |
| |
| private static final String TAG = "NotePadProvider"; |
| |
| private static final String DATABASE_NAME = "note_pad.db"; |
| private static final int DATABASE_VERSION = 2; |
| private static final String NOTES_TABLE_NAME = "notes"; |
| |
| private static HashMap<String, String> sNotesProjectionMap; |
| private static HashMap<String, String> sLiveFolderProjectionMap; |
| |
| private static final int NOTES = 1; |
| private static final int NOTE_ID = 2; |
| private static final int LIVE_FOLDER_NOTES = 3; |
| |
| private static final UriMatcher sUriMatcher; |
| |
| /** |
| * This class helps open, create, and upgrade the database file. |
| */ |
| private static class DatabaseHelper extends SQLiteOpenHelper { |
| |
| DatabaseHelper(Context context) { |
| super(context, DATABASE_NAME, null, DATABASE_VERSION); |
| } |
| |
| @Override |
| public void onCreate(SQLiteDatabase db) { |
| db.execSQL("CREATE TABLE " + NOTES_TABLE_NAME + " (" |
| + Notes._ID + " INTEGER PRIMARY KEY," |
| + Notes.TITLE + " TEXT," |
| + Notes.NOTE + " TEXT," |
| + Notes.CREATED_DATE + " INTEGER," |
| + Notes.MODIFIED_DATE + " INTEGER" |
| + ");"); |
| } |
| |
| @Override |
| public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { |
| Log.w(TAG, "Upgrading database from version " + oldVersion + " to " |
| + newVersion + ", which will destroy all old data"); |
| db.execSQL("DROP TABLE IF EXISTS notes"); |
| onCreate(db); |
| } |
| } |
| |
| private DatabaseHelper mOpenHelper; |
| |
| @Override |
| public boolean onCreate() { |
| mOpenHelper = new DatabaseHelper(getContext()); |
| return true; |
| } |
| |
| @Override |
| public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, |
| String sortOrder) { |
| SQLiteQueryBuilder qb = new SQLiteQueryBuilder(); |
| qb.setTables(NOTES_TABLE_NAME); |
| |
| switch (sUriMatcher.match(uri)) { |
| case NOTES: |
| qb.setProjectionMap(sNotesProjectionMap); |
| break; |
| |
| case NOTE_ID: |
| qb.setProjectionMap(sNotesProjectionMap); |
| qb.appendWhere(Notes._ID + "=" + uri.getPathSegments().get(1)); |
| break; |
| |
| case LIVE_FOLDER_NOTES: |
| qb.setProjectionMap(sLiveFolderProjectionMap); |
| break; |
| |
| default: |
| throw new IllegalArgumentException("Unknown URI " + uri); |
| } |
| |
| // If no sort order is specified use the default |
| String orderBy; |
| if (TextUtils.isEmpty(sortOrder)) { |
| orderBy = NotePad.Notes.DEFAULT_SORT_ORDER; |
| } else { |
| orderBy = sortOrder; |
| } |
| |
| // Get the database and run the query |
| SQLiteDatabase db = mOpenHelper.getReadableDatabase(); |
| Cursor c = qb.query(db, projection, selection, selectionArgs, null, null, orderBy); |
| |
| // Tell the cursor what uri to watch, so it knows when its source data changes |
| c.setNotificationUri(getContext().getContentResolver(), uri); |
| return c; |
| } |
| |
| @Override |
| public String getType(Uri uri) { |
| switch (sUriMatcher.match(uri)) { |
| case NOTES: |
| case LIVE_FOLDER_NOTES: |
| return Notes.CONTENT_TYPE; |
| |
| case NOTE_ID: |
| return Notes.CONTENT_ITEM_TYPE; |
| |
| default: |
| throw new IllegalArgumentException("Unknown URI " + uri); |
| } |
| } |
| |
| @Override |
| public Uri insert(Uri uri, ContentValues initialValues) { |
| // Validate the requested uri |
| if (sUriMatcher.match(uri) != NOTES) { |
| throw new IllegalArgumentException("Unknown URI " + uri); |
| } |
| |
| ContentValues values; |
| if (initialValues != null) { |
| values = new ContentValues(initialValues); |
| } else { |
| values = new ContentValues(); |
| } |
| |
| Long now = Long.valueOf(System.currentTimeMillis()); |
| |
| // Make sure that the fields are all set |
| if (values.containsKey(NotePad.Notes.CREATED_DATE) == false) { |
| values.put(NotePad.Notes.CREATED_DATE, now); |
| } |
| |
| if (values.containsKey(NotePad.Notes.MODIFIED_DATE) == false) { |
| values.put(NotePad.Notes.MODIFIED_DATE, now); |
| } |
| |
| if (values.containsKey(NotePad.Notes.TITLE) == false) { |
| Resources r = Resources.getSystem(); |
| values.put(NotePad.Notes.TITLE, r.getString(android.R.string.untitled)); |
| } |
| |
| if (values.containsKey(NotePad.Notes.NOTE) == false) { |
| values.put(NotePad.Notes.NOTE, ""); |
| } |
| |
| SQLiteDatabase db = mOpenHelper.getWritableDatabase(); |
| long rowId = db.insert(NOTES_TABLE_NAME, Notes.NOTE, values); |
| if (rowId > 0) { |
| Uri noteUri = ContentUris.withAppendedId(NotePad.Notes.CONTENT_URI, rowId); |
| getContext().getContentResolver().notifyChange(noteUri, null); |
| return noteUri; |
| } |
| |
| throw new SQLException("Failed to insert row into " + uri); |
| } |
| |
| @Override |
| public int delete(Uri uri, String where, String[] whereArgs) { |
| SQLiteDatabase db = mOpenHelper.getWritableDatabase(); |
| int count; |
| switch (sUriMatcher.match(uri)) { |
| case NOTES: |
| count = db.delete(NOTES_TABLE_NAME, where, whereArgs); |
| break; |
| |
| case NOTE_ID: |
| String noteId = uri.getPathSegments().get(1); |
| count = db.delete(NOTES_TABLE_NAME, Notes._ID + "=" + noteId |
| + (!TextUtils.isEmpty(where) ? " AND (" + where + ')' : ""), whereArgs); |
| break; |
| |
| default: |
| throw new IllegalArgumentException("Unknown URI " + uri); |
| } |
| |
| getContext().getContentResolver().notifyChange(uri, null); |
| return count; |
| } |
| |
| @Override |
| public int update(Uri uri, ContentValues values, String where, String[] whereArgs) { |
| SQLiteDatabase db = mOpenHelper.getWritableDatabase(); |
| int count; |
| switch (sUriMatcher.match(uri)) { |
| case NOTES: |
| count = db.update(NOTES_TABLE_NAME, values, where, whereArgs); |
| break; |
| |
| case NOTE_ID: |
| String noteId = uri.getPathSegments().get(1); |
| count = db.update(NOTES_TABLE_NAME, values, Notes._ID + "=" + noteId |
| + (!TextUtils.isEmpty(where) ? " AND (" + where + ')' : ""), whereArgs); |
| break; |
| |
| default: |
| throw new IllegalArgumentException("Unknown URI " + uri); |
| } |
| |
| getContext().getContentResolver().notifyChange(uri, null); |
| return count; |
| } |
| |
| static { |
| sUriMatcher = new UriMatcher(UriMatcher.NO_MATCH); |
| sUriMatcher.addURI(NotePad.AUTHORITY, "notes", NOTES); |
| sUriMatcher.addURI(NotePad.AUTHORITY, "notes/#", NOTE_ID); |
| sUriMatcher.addURI(NotePad.AUTHORITY, "live_folders/notes", LIVE_FOLDER_NOTES); |
| |
| sNotesProjectionMap = new HashMap<String, String>(); |
| sNotesProjectionMap.put(Notes._ID, Notes._ID); |
| sNotesProjectionMap.put(Notes.TITLE, Notes.TITLE); |
| sNotesProjectionMap.put(Notes.NOTE, Notes.NOTE); |
| sNotesProjectionMap.put(Notes.CREATED_DATE, Notes.CREATED_DATE); |
| sNotesProjectionMap.put(Notes.MODIFIED_DATE, Notes.MODIFIED_DATE); |
| |
| // Support for Live Folders. |
| sLiveFolderProjectionMap = new HashMap<String, String>(); |
| sLiveFolderProjectionMap.put(LiveFolders._ID, Notes._ID + " AS " + |
| LiveFolders._ID); |
| sLiveFolderProjectionMap.put(LiveFolders.NAME, Notes.TITLE + " AS " + |
| LiveFolders.NAME); |
| // Add more columns here for more robust Live Folders. |
| } |
| } |