var $sqlite = {
storageService: [],
mDBConn: [],
_initService : function(file){
var db = Components.classes["@mozilla.org/file/directory_service;1"].getService(Components.interfaces.nsIProperties).get("ProfD", Components.interfaces.nsIFile);
db.append(file);
this.storageService[file] = Components.classes["@mozilla.org/storage/service;1"].getService(Components.interfaces.mozIStorageService);
this.mDBConn[file] = (this.storageService[file]).openDatabase(db);
},
select : function(file,sql,param){
if (this.storageService[file]== undefined){
this._initService(file);
}
var ourTransaction = false;
if ((this.mDBConn[file]).transactionInProgress){
ourTransaction = true;
(this.mDBConn[file]).beginTransactionAs((this.mDBConn[file]).TRANSACTION_DEFERRED);
}
var statement = (this.mDBConn[file]).createStatement(sql);
if (param){
for (var m=2, arg=null; arg=arguments[m]; m++) {
statement.bindUTF8StringParameter(m-2, arg);
}
}
try{
var dataset = [];
while (statement.executeStep()){
var row = [];
for(var i=0,k=statement.columnCount; i<k; i++){
row[statement.getColumnName(i)] = statement.getUTF8String(i);
}
dataset.push(row);
}
// return dataset;
}
finally {
statement.reset();
}
if (ourTransaction){
(this.mDBConn[file]).commitTransaction();
}
return dataset;
},
cmd : function(file,sql,param){
if (this.storageService[file] == undefined){
this._initService(file);
}
var ourTransaction = false;
if ((this.mDBConn[file]).transactionInProgress){
ourTransaction = true;
(this.mDBConn[file]).beginTransactionAs((this.mDBConn[file]).TRANSACTION_DEFERRED);
}
var statement = (this.mDBConn[file]).createStatement(sql);
if (param){
for (var m=2, arg=null; arg=arguments[m]; m++) {
statement.bindUTF8StringParameter(m-2, arg);
}
}
try{
statement.execute();
}
finally {
statement.reset();
}
if (ourTransaction){
(this.mDBConn[file]).commitTransaction();
}
}
}
Usage:
<script language="javascript">
//some variables :
//assuming db file is in user's profile directory:
var myDBFile = 'mydb.sqlite';
// some example SQL queries:
var myCreateDBQuery = 'CREATE TABLE IF NOT EXISTS mybooks_tbl (id INTEGER PRIMARY KEY AUTOINCREMENT, title TEXT);';
var myInsertQuery = 'INSERT INTO mybooks_tbl(title) VALUES("book title1");';
var myInsertQueryParameterized = 'INSERT INTO mybooks_tbl(title) VALUES(?1);';
var mySelectQuery = 'SELECT id,title FROM mybooks_tbl';
var mySelectQueryParameterized = 'SELECT id,title FROM mybooks_tbl WHERE id = ?1 AND title = ?2';
// For anything other than SELECT statement, use $sqlite.cmd() :
// creating a DB:
function test_createDB(){
$sqlite.cmd(myDBFile,myCreateDBQuery);
}
// simple add record:
function test_addRecord(){
$sqlite.cmd(myDBFile,myInsertQuery);
}
// parameterized add record, add parameters as much as you want:
function test_addRecordParameterized(){
// for example, adding 3 records:
for(var i = 1 ; i < 4; i++){
$sqlite.cmd(myDBFile,myInsertQueryParameterized,'book title'+i+'');
}
}
// for SELECT, use $sqlite.select() :
// simple select:
function test_Select(){
var myArray1 = $sqlite.select(myDBFile,mySelectQuery);
// Now you can loop through the array:
for(var j=0;j<myArray1.length;j++){
// change this as you wish:
alert(myArray1[j]['title']);
}
}
// select with bound parameters, add parameters as much as you want:
function test_SelectParameterized(){
var myArray1 = $sqlite.select(myDBFile,mySelectQueryParameterized,'1','book title1');
// Now you can loop through the array:
for(var j=0;j<myArray1.length;j++){
// change this as you wish:
alert(myArray1[j]['title']);
}
}
</script>
<a href="#" onclick="test_createDB();">Create DB</a> |
<a href="#" onclick="test_addRecord()">Simple Add Record</a> |
<a href="#" onclick="test_addRecordParameterized()">Parameterized Add Record</a> |
<a href="#" onclick="test_Select()">Simple Select</a> |
<a href="#" onclick="test_SelectParameterized()">Parameterized Select</a> |
