Flex AIR Sqlite as embedded database - apache-flex

Question

I am devloping an editor with spell check feature in Flex + AIR using Sqlite as an embedded database.
In database I have a table with the words. The table contains lacs of words. I have written the code to search for the word in table. I have used the sync method for all this. This pauses my application while searching.
I would like to use async method to stop application pause.
The code for Search word is as follows:
public function searchInDictionary(word:String):Boolean
{
if(word == "")
return true;
connection= new SQLConnection();
var query:SQLStatement = new SQLStatement();
query.sqlConnection = connection;
query.text = 'SELECT id FROM tbl_'+ CommonLanguageCode +' WHERE word LIKE "'+word+'"';
try
{
connection.open( dbfile,SQLMode.READ );
}
catch(ex:Error)
{}
if(!connection.connected)
connection.open( dbfile );
query.execute();
var result:SQLResult = query.getResult();
if( result.data == null )
{
return false;
}
else
{
var numRows:uint = result.data.length;
var id:String;
if(numRows>0)
return true;
return false;
}
return false;
}
If this function returns false(word not found) then i have to call the function to to red underline that word.
Please suggest me if I am going wrong. As I am using Sync method & it takes some milli seconds to search a word. & if I am wrting a paragraph then it makes my application sluggish.
Is there any other way I can store the words & search more fastly. If yes then please et me know.
Thanks in advance.

Answer 1

You'll need to reorganize your code a bit so that you call your function that does the red underline when the results come back instead of returning a Boolean from the method.
public function searchInDictionary(word:String):void
{
// Don't bother searching if no word was passed in
if(word == "") return;
// Open db connection asynchronously
var connection:SQLConnection = new SQLConnection();
connection.openAsync(dbfile, SQLMode.READ);
// Create statement
var statement:SQLStatement = new SQLStatement();
statement.sqlConnection = connection;
statement.text = 'SELECT id '
+ 'FROM tbl_'+ CommonLanguageCode +' '
+ 'WHERE word LIKE "' + word + '"';
// Add event listener
statement.addEventListener(SQLEvent.RESULT, function(event:SQLEvent):void{
var result:SQLResult = event.target.getResult();
if(result.data.length == 0) {
// ... call method to red underline word in text ...
}
});
// Execute statement
statement.execute();
}