/***
Copyright (c) 2008-2012 CommonsWare, LLC
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.
Covered in detail in the book _The Busy Coder's Guide to Android Development_
https://commonsware.com/Android
*/
package com.commonsware.android.constants;
import android.content.ContentProvider;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.UriMatcher;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteQueryBuilder;
import android.net.Uri;
import android.provider.BaseColumns;
import android.text.TextUtils;
public class Provider extends ContentProvider {
private static final int CONSTANTS=1;
private static final int CONSTANT_ID=2;
private static final UriMatcher MATCHER;
private static final String TABLE="constants";
public static final class Constants implements BaseColumns {
public static final Uri CONTENT_URI=
Uri.parse("content://com.commonsware.android.constants.Provider/constants");
public static final String DEFAULT_SORT_ORDER="title";
public static final String TITLE="title";
public static final String VALUE="value";
}
static {
MATCHER=new UriMatcher(UriMatcher.NO_MATCH);
MATCHER.addURI("com.commonsware.android.constants.Provider",
"constants", CONSTANTS);
MATCHER.addURI("com.commonsware.android.constants.Provider",
"constants/#", CONSTANT_ID);
}
private DatabaseHelper db=null;
@Override
public boolean onCreate() {
db=new DatabaseHelper(getContext());
return((db == null) ? false : true);
}
@Override
public Cursor query(Uri url, String[] projection, String selection,
String[] selectionArgs, String sort) {
SQLiteQueryBuilder qb=new SQLiteQueryBuilder();
qb.setTables(TABLE);
String orderBy;
if (TextUtils.isEmpty(sort)) {
orderBy=Constants.DEFAULT_SORT_ORDER;
}
else {
orderBy=sort;
}
Cursor c=
qb.query(db.getReadableDatabase(), projection, selection,
selectionArgs, null, null, orderBy);
c.setNotificationUri(getContext().getContentResolver(), url);
return(c);
}
@Override
public String getType(Uri url) {
if (isCollectionUri(url)) {
return("vnd.commonsware.cursor.dir/constant");
}
return("vnd.commonsware.cursor.item/constant");
}
@Override
public Uri insert(Uri url, ContentValues initialValues) {
long rowID=
db.getWritableDatabase().insert(TABLE, Constants.TITLE,
initialValues);
if (rowID > 0) {
Uri uri=
ContentUris.withAppendedId(Provider.Constants.CONTENT_URI,
rowID);
getContext().getContentResolver().notifyChange(uri, null);
return(uri);
}
throw new SQLException("Failed to insert row into " + url);
}
@Override
public int delete(Uri url, String where, String[] whereArgs) {
int count=db.getWritableDatabase().delete(TABLE, where, whereArgs);
getContext().getContentResolver().notifyChange(url, null);
return(count);
}
@Override
public int update(Uri url, ContentValues values, String where,
String[] whereArgs) {
int count=
db.getWritableDatabase()
.update(TABLE, values, where, whereArgs);
getContext().getContentResolver().notifyChange(url, null);
return(count);
}
private boolean isCollectionUri(Uri url) {
return(MATCHER.match(url) == CONSTANTS);
}
}