@Override
public Cursor query(
@NonNull Uri uri,
String[] projection,
String selection,
String[] selectionArgs,
String sortOrder) {
int match = uriMatcher.match(uri);
String table;
String useSelection = selection;
String[] useSelectionArgs = selectionArgs;
switch (match) {
case ALL_ROWS:
table = uri.getLastPathSegment();
break;
case ROW_BY_ID:
List<String> segments = uri.getPathSegments();
table = segments.get(TABLE_SEGMENT);
useSelection = WHERE_MATCHES_ID;
useSelectionArgs = new String[] {segments.get(ID_SEGMENT)};
break;
default:
throw new UnsupportedOperationException("Unknown uri: " + uri);
}
boolean distinct = false;
String limit = null;
// If have query parameters, see if any exist interested in.
if (!TextUtils.isEmpty(uri.getQuery())) {
distinct = uri.getBooleanQueryParameter(DISTINCT_PARAMETER, false);
limit = uri.getQueryParameter(LIMIT_PARAMETER);
}
SQLiteDatabase db = dbHelper.getReadableDatabase();
db.acquireReference();
try {
Cursor cursor =
db.query(
distinct,
table,
projection,
useSelection,
useSelectionArgs,
null,
null,
sortOrder,
limit);
// Register the cursor with the requested URI so the caller will receive
// future database change notifications. Useful for "loaders" which take advantage
// of this concept.
cursor.setNotificationUri(getContext().getContentResolver(), uri);
return cursor;
} finally {
db.releaseReference();
}
}
@Override
public int update(
@NonNull Uri uri, ContentValues values, String selection, String[] selectionArgs) {
int match = uriMatcher.match(uri);
String table;
String useSelection = selection;
String[] useSelectionArgs = selectionArgs;
switch (match) {
case ALL_ROWS:
table = uri.getLastPathSegment();
break;
case ROW_BY_ID:
List<String> segments = uri.getPathSegments();
table = segments.get(TABLE_SEGMENT);
useSelection = WHERE_MATCHES_ID;
useSelectionArgs = new String[] {segments.get(ID_SEGMENT)};
break;
default:
throw new UnsupportedOperationException("Unknown uri: " + uri);
}
int rows = 0;
SQLiteDatabase db = dbHelper.getWritableDatabase();
db.acquireReference();
try {
startTransaction(db);
try {
rows = db.update(table, values, useSelection, useSelectionArgs);
db.setTransactionSuccessful();
} finally {
db.endTransaction();
}
} finally {
db.releaseReference();
}
// notify change essentially indicates to any users with active cursors
// that they need to "reload" the data
if (rows > 0) {
notifyChange(uri);
}
return rows;
}
@Override
public int bulkInsert(@NonNull Uri uri, @NonNull ContentValues[] valuesArray) {
int match = uriMatcher.match(uri);
String table;
switch (match) {
case ALL_ROWS:
table = uri.getLastPathSegment();
break;
case ROW_BY_ID:
throw new UnsupportedOperationException("Unable to insert by id for uri: " + uri);
default:
throw new UnsupportedOperationException("Unknown uri: " + uri);
}
SQLiteDatabase db = dbHelper.getWritableDatabase();
int count = 0;
db.acquireReference();
try {
startTransaction(db);
try {
final String nullColumnHack = getNullColumnHack(table);
final int conflictAlgorithm = getConflictAlgorithm(table);
for (ContentValues values : valuesArray) {
long id = db.insertWithOnConflict(table, nullColumnHack, values, conflictAlgorithm);
if (id != -1) {
++count;
}
}
db.setTransactionSuccessful();
} finally {
db.endTransaction();
}
} finally {
db.releaseReference();
}
// notify change essentially indicates to any users with active cursors
// that they need to "reload" the data
if (count > 0) {
notifyChange(uri);
}
return count;
}
@Override
public Uri insert(@NonNull Uri uri, ContentValues values) {
int match = uriMatcher.match(uri);
String table;
switch (match) {
case ALL_ROWS:
table = uri.getLastPathSegment();
break;
case ROW_BY_ID:
throw new UnsupportedOperationException("Unable to insert by id for uri: " + uri);
default:
throw new UnsupportedOperationException("Unknown uri: " + uri);
}
long id = -1;
SQLiteDatabase db = dbHelper.getWritableDatabase();
db.acquireReference();
try {
startTransaction(db);
try {
id =
db.insertWithOnConflict(
table, getNullColumnHack(table), values, getConflictAlgorithm(table));
db.setTransactionSuccessful();
} finally {
db.endTransaction();
}
} finally {
db.releaseReference();
}
if (id == -1) {
return null;
}
// notify change essentially indicates to any users with active cursors
// that they need to "reload" the data
notifyChange(uri);
return ContentUris.withAppendedId(uri, id);
}
@Override
public void onOpen(final SQLiteDatabase db) {
super.onOpen(db);
new AsyncTask<Void, Void, Void>() {
private SQLiteStatement getInsertStatementForTable(String table) {
if ("state".equals(table))
return db.compileStatement(
"INSERT INTO state (state_id, state_abbrev, state_name) VALUES (?, ?, ?)");
else if ("county".equals(table))
return db.compileStatement(
"INSERT INTO county (state_id, county_id, county_name) VALUES (?, ?, ?)");
else if ("zone".equals(table))
return db.compileStatement(
"INSERT INTO zone (state_id, zone_id, zone_name) VALUES (?, ?, ?)");
else if ("county_zone".equals(table))
return db.compileStatement(
"INSERT INTO county_zone (county_state_id, county_id, zone_state_id, zone_id) VALUES (?, ?, ?, ?)");
else if ("database_version".equals(table))
return db.compileStatement(
"INSERT INTO database_version (database_version_id, schema_version, last_update_time) VALUES (?, ?, ?)");
else return null;
}
private SQLiteStatement getUpdateStatementForTable(String table) {
if ("state".equals(table))
return db.compileStatement(
"UPDATE state SET state_abbrev = ?2, state_name = ?3 WHERE state_id = ?1");
else if ("county".equals(table))
return db.compileStatement(
"UPDATE county SET county_name = ?3 WHERE state_id = ?1 AND county_id = ?2");
else if ("zone".equals(table))
return db.compileStatement(
"UPDATE zone SET zone_name = ?3 WHERE state_id = ?1 AND zone_id = ?2");
// else if ("county_zone".equals(table))
// return db.compileStatement("UPDATE county_zone SET (county_state_id, county_id,
// zone_state_id, zone_id) VALUES (?, ?, ?, ?)");
else if ("database_version".equals(table))
return db.compileStatement(
"UPDATE database_version SET schema_version = ?2, last_update_time = ?3 WHERE database_version_id = ?1");
else return null;
}
private SQLiteStatement getDeleteStatementForTable(String table) {
if ("state".equals(table))
return db.compileStatement("DELETE FROM state WHERE state_id = ?");
else if ("county".equals(table))
return db.compileStatement("DELETE FROM county WHERE state_id = ? and county_id = ?");
else if ("zone".equals(table))
return db.compileStatement("DELETE FROM zone WHERE state_id = ? AND zone_id = ?");
else if ("county_zone".equals(table))
return db.compileStatement(
"DELETE FROM county_zone WHERE county_state_id = ? AND county_id = ? AND zone_state_id = ? AND zone_id = ?");
else if ("database_version".equals(table))
return db.compileStatement("DELETE FROM database_version WHERE database_version_id = ?");
else return null;
}
@Override
protected Void doInBackground(Void... voids) {
HttpURLConnection conn = null;
try {
String versionArg = "";
Cursor cursor = db.rawQuery("SELECT last_update_time FROM database_version", null);
try {
if (cursor.moveToFirst())
versionArg = String.format(Locale.US, "&since=%s", Uri.encode(cursor.getString(0)));
} finally {
cursor.close();
cursor = null;
}
String urlprefix = "https://captest-1180.appspot.com";
if (BuildConfig.FLAVOR.equals("local")) urlprefix = "http://10.0.2.2:8080";
conn =
(HttpURLConnection)
new URL(
String.format(
Locale.US,
"%s/data.cgi?schema=%d%s",
urlprefix,
db.getVersion(),
versionArg))
.openConnection();
int status = conn.getResponseCode();
if (status != 200) {
if (status == 301 || status == 302) {
conn.getInputStream().close();
conn.disconnect();
conn = (HttpURLConnection) new URL(conn.getHeaderField("Location")).openConnection();
status = conn.getResponseCode();
}
if (status != 200) {
conn.getErrorStream().close();
throw new IOException("Get failed with status code " + status);
}
}
JsonParser parser =
new JacksonFactory()
.createJsonParser(conn.getInputStream(), Charset.forName("UTF-8"));
try {
Deque<StreamState> stateDeque = new ArrayDeque<StreamState>();
String table = null;
int index = 0;
SQLiteStatement stmt = null;
db.beginTransaction();
try {
do {
JsonToken token = parser.nextToken();
switch (token) {
case START_OBJECT:
if (stateDeque.isEmpty()) stateDeque.push(StreamState.START);
break;
case END_OBJECT:
switch (stateDeque.peek()) {
case START:
stateDeque.pop();
break;
case TABLE:
stateDeque.pop();
table = null;
break;
case ADD:
case CHANGE:
case REMOVE:
if (stmt != null) stmt.close();
stmt = null;
stateDeque.pop();
break;
}
break;
case FIELD_NAME:
switch (stateDeque.peek()) {
case START:
table = parser.getCurrentName();
stateDeque.push(StreamState.TABLE);
break;
case TABLE:
if ("added".equals(parser.getCurrentName())) {
stmt = getInsertStatementForTable(table);
stateDeque.push(StreamState.ADD);
} else if ("changed".equals(parser.getCurrentName())) {
stmt = getUpdateStatementForTable(table);
stateDeque.push(StreamState.CHANGE);
} else if ("removed".equals(parser.getCurrentName())) {
stmt = getDeleteStatementForTable(table);
stateDeque.push(StreamState.REMOVE);
}
break;
}
break;
case START_ARRAY:
switch (stateDeque.peek()) {
case ADD:
case CHANGE:
case REMOVE:
stateDeque.push(StreamState.ROW_ARRAY);
break;
case ROW_ARRAY:
stateDeque.push(StreamState.ROW);
index = 0;
break;
}
break;
case END_ARRAY:
switch (stateDeque.peek()) {
case ROW:
if (stmt != null) stmt.execute();
case ROW_ARRAY:
stateDeque.pop();
break;
}
if (!stateDeque.isEmpty()) {
switch (stateDeque.peek()) {
case ADD:
case CHANGE:
case REMOVE:
if (stmt != null) stmt.close();
stmt = null;
stateDeque.pop();
break;
}
}
break;
case VALUE_STRING:
switch (stateDeque.peek()) {
case ROW:
if (stmt != null) stmt.bindString(++index, parser.getText());
break;
}
break;
case VALUE_NUMBER_INT:
switch (stateDeque.peek()) {
case ROW:
if (stmt != null) stmt.bindLong(++index, parser.getLongValue());
break;
}
break;
case VALUE_NUMBER_FLOAT:
switch (stateDeque.peek()) {
case ROW:
if (stmt != null) stmt.bindDouble(++index, parser.getDoubleValue());
break;
}
break;
case VALUE_NULL:
switch (stateDeque.peek()) {
case ROW:
if (stmt != null) stmt.bindNull(++index);
break;
}
break;
case VALUE_TRUE:
switch (stateDeque.peek()) {
case ROW:
if (stmt != null) stmt.bindLong(++index, 1);
break;
}
break;
case VALUE_FALSE:
switch (stateDeque.peek()) {
case ROW:
if (stmt != null) stmt.bindLong(++index, 0);
break;
}
break;
}
} while (!stateDeque.isEmpty());
db.setTransactionSuccessful();
} finally {
parser.close();
}
} finally {
db.endTransaction();
}
} catch (MalformedURLException e) {
throw new RuntimeException(e);
} catch (IOException e) {
throw new RuntimeException(e);
} finally {
if (conn != null) conn.disconnect();
db.releaseReference();
}
return null;
}
}.execute();
db.acquireReference();
}
