/**
* Delete a database.
*
* @param dbname The name of the database-NOT including its extension.
* @return true if successful or false if an exception was encountered
*/
private boolean deleteDatabase(String dbname) {
boolean status = false; // assume the worst case:
if (this.getDatabase(dbname) != null) this.closeDatabase(dbname);
File dbfile = this.cordova.getActivity().getDatabasePath(dbname + ".db");
Log.v("info", "delete sqlite db: " + dbfile.getAbsolutePath());
// Use try & catch just in case android.os.Build.VERSION.SDK_INT >= 16 was lying:
try {
status = SQLiteDatabase.deleteDatabase(dbfile);
} catch (Exception ex) {
// log & give up:
Log.v("executeSqlBatch", "deleteDatabase(): Error=" + ex.getMessage());
ex.printStackTrace();
}
return status;
}
/**
* Executes a batch request and sends the results via sendJavascriptCB().
*
* @param dbname The name of the database.
* @param queryarr Array of query strings
* @param jsonparams Array of JSON query parameters
* @param queryIDs Array of query ids
* @param cbc Callback context from Cordova API
*/
private void executeSqlBatch(
String dbname,
String[] queryarr,
JSONArray[] jsonparams,
String[] queryIDs,
CallbackContext cbc) {
SQLiteDatabase mydb = this.getDatabase(dbname);
if (mydb == null) return;
String query = "";
String query_id = "";
int len = queryarr.length;
JSONArray batchResults = new JSONArray();
for (int i = 0; i < len; i++) {
query_id = queryIDs[i];
JSONObject queryResult = null;
String errorMessage = "unknown";
try {
boolean needRawQuery = true;
query = queryarr[i];
// UPDATE or DELETE:
// NOTE: this code should be safe to RUN with old Android SDK.
// To BUILD with old Android SDK remove lines from HERE: {{
if (android.os.Build.VERSION.SDK_INT >= 11
&& (query.toLowerCase().startsWith("update")
|| query.toLowerCase().startsWith("delete"))) {
SQLiteStatement myStatement = mydb.compileStatement(query);
if (jsonparams != null) {
for (int j = 0; j < jsonparams[i].length(); j++) {
if (jsonparams[i].get(j) instanceof Float || jsonparams[i].get(j) instanceof Double) {
myStatement.bindDouble(j + 1, jsonparams[i].getDouble(j));
} else if (jsonparams[i].get(j) instanceof Number) {
myStatement.bindLong(j + 1, jsonparams[i].getLong(j));
} else if (jsonparams[i].isNull(j)) {
myStatement.bindNull(j + 1);
} else {
myStatement.bindString(j + 1, jsonparams[i].getString(j));
}
}
}
int rowsAffected = -1; // (assuming invalid)
// Use try & catch just in case android.os.Build.VERSION.SDK_INT >= 11 is lying:
try {
rowsAffected = myStatement.executeUpdateDelete();
// Indicate valid results:
needRawQuery = false;
} catch (SQLiteException ex) {
// Indicate problem & stop this query:
ex.printStackTrace();
errorMessage = ex.getMessage();
Log.v(
"executeSqlBatch", "SQLiteStatement.executeUpdateDelete(): Error=" + errorMessage);
needRawQuery = false;
} catch (Exception ex) {
// Assuming SDK_INT was lying & method not found:
// do nothing here & try again with raw query.
}
if (rowsAffected != -1) {
queryResult = new JSONObject();
queryResult.put("rowsAffected", rowsAffected);
}
} // to HERE. }}
// INSERT:
if (query.toLowerCase().startsWith("insert") && jsonparams != null) {
needRawQuery = false;
SQLiteStatement myStatement = mydb.compileStatement(query);
for (int j = 0; j < jsonparams[i].length(); j++) {
if (jsonparams[i].get(j) instanceof Float || jsonparams[i].get(j) instanceof Double) {
myStatement.bindDouble(j + 1, jsonparams[i].getDouble(j));
} else if (jsonparams[i].get(j) instanceof Number) {
myStatement.bindLong(j + 1, jsonparams[i].getLong(j));
} else if (jsonparams[i].isNull(j)) {
myStatement.bindNull(j + 1);
} else {
myStatement.bindString(j + 1, jsonparams[i].getString(j));
}
}
long insertId = -1; // (invalid)
try {
insertId = myStatement.executeInsert();
} catch (SQLiteException ex) {
ex.printStackTrace();
errorMessage = ex.getMessage();
Log.v("executeSqlBatch", "SQLiteDatabase.executeInsert(): Error=" + errorMessage);
}
if (insertId != -1) {
queryResult = new JSONObject();
queryResult.put("insertId", insertId);
queryResult.put("rowsAffected", 1);
}
}
if (query.toLowerCase().startsWith("begin")) {
needRawQuery = false;
try {
mydb.beginTransaction();
queryResult = new JSONObject();
queryResult.put("rowsAffected", 0);
} catch (SQLiteException ex) {
ex.printStackTrace();
errorMessage = ex.getMessage();
Log.v("executeSqlBatch", "SQLiteDatabase.beginTransaction(): Error=" + errorMessage);
}
}
if (query.toLowerCase().startsWith("commit")) {
needRawQuery = false;
try {
mydb.setTransactionSuccessful();
mydb.endTransaction();
queryResult = new JSONObject();
queryResult.put("rowsAffected", 0);
} catch (SQLiteException ex) {
ex.printStackTrace();
errorMessage = ex.getMessage();
Log.v(
"executeSqlBatch",
"SQLiteDatabase.setTransactionSuccessful/endTransaction(): Error=" + errorMessage);
}
}
if (query.toLowerCase().startsWith("rollback")) {
needRawQuery = false;
try {
mydb.endTransaction();
queryResult = new JSONObject();
queryResult.put("rowsAffected", 0);
} catch (SQLiteException ex) {
ex.printStackTrace();
errorMessage = ex.getMessage();
Log.v("executeSqlBatch", "SQLiteDatabase.endTransaction(): Error=" + errorMessage);
}
}
// raw query for other statements:
if (needRawQuery) {
String[] params = null;
if (jsonparams != null) {
params = new String[jsonparams[i].length()];
for (int j = 0; j < jsonparams[i].length(); j++) {
if (jsonparams[i].isNull(j)) params[j] = "";
else params[j] = jsonparams[i].getString(j);
}
}
Cursor myCursor = mydb.rawQuery(query, params);
if (query_id.length() > 0) {
queryResult = this.getRowsResultFromQuery(myCursor);
}
myCursor.close();
}
} catch (Exception ex) {
ex.printStackTrace();
errorMessage = ex.getMessage();
Log.v("executeSqlBatch", "SQLitePlugin.executeSql[Batch](): Error=" + errorMessage);
}
try {
if (queryResult != null) {
JSONObject r = new JSONObject();
r.put("qid", query_id);
r.put("type", "success");
r.put("result", queryResult);
batchResults.put(r);
} else {
JSONObject r = new JSONObject();
r.put("qid", query_id);
r.put("type", "error");
JSONObject er = new JSONObject();
er.put("message", errorMessage);
r.put("result", er);
batchResults.put(r);
}
} catch (JSONException ex) {
ex.printStackTrace();
Log.v("executeSqlBatch", "SQLitePlugin.executeSql[Batch](): Error=" + ex.getMessage());
// TODO what to do?
}
}
cbc.success(batchResults);
}
