I would trace out stream.bytesAvailable to see how many bytes are available. Maybe the stream isn't where you think it is in the file. Similarly, track the file size as you write it out and see if the numbers make sense. Also make sure your writeObject and readObject methods are correct. Maybe readObject is reading too many bytes.
________________________________ From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Claudio M. E. Bastos Iorio Sent: Thursday, August 14, 2008 4:04 PM To: [email protected] Subject: RE: [flexcoders] Re: writeObject() and readObject() I have control over the way the file is written (I'm creating and saving the file). I'm actually adding objects using FileMode.APPEND. So, the resulting file (simplified, and if you open it using notepad) is something like: s!com.DocumentFileidid55555 s!com.DocumentFileidid55556 s!com.DocumentFileidid55557 using (see my following code) FileStream.bytesAvailable I CAN read the data, but (following my example), I can assign only the LAST saved object. I'd like to retrieve all of them, and later assign it to an array, filter.. while(stream.bytesAvailable){ var aDoc:DocumentFile = stream.readObject() as DocumentFile;//only stores the last saved DocumentFile, no matter if I have other objects stored } ____________________________________ Claudio M. E. Bastos Iorio http://www.blumer.com.ar <http://www.blumer.com.ar/> From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Alex Harui Sent: Thursday, August 14, 2008 7:06 PM To: [email protected] Subject: RE: [flexcoders] Re: writeObject() and readObject() You have to know what it is in the file or how to figure it out. If you don't have control over the way the file is written, it will be much harder. I don't know why if there are bytes available and it is a sequence of DocumentFiles that you can't just read them. Make sure you know what is really in the file. ________________________________ From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Claudio M. E. Bastos Iorio Sent: Thursday, August 14, 2008 2:54 PM To: [email protected] Subject: RE: [flexcoders] Re: writeObject() and readObject() Alex, many thanks for your responses. I'd like to use the array's 'push' method, but I'm loading the objects from a file, while the filestream has bytesavailable, like this: while(stream.bytesAvailable){ _whatshouldIuseHere = stream.readObject() as DocumentFile;// var aDoc:DocumentFile = stream.readObject() as DocumentFile;//only stores the last saved DocumentFile, no matter if I have other objects stored } The question should be: given a file, that stores some objects saved in AMF format. What can I do to retrieve each object, filter? ____________________________________ Claudio M. E. Bastos Iorio http://www.blumer.com.ar <http://www.blumer.com.ar/> From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Alex Harui Sent: Thursday, August 14, 2008 4:46 PM To: [email protected] Subject: RE: [flexcoders] Re: writeObject() and readObject() I think I don't understand your problem. Normally, if you know how many you are going to write, you would do: arr.push(someDocumentFile); arr.push(someOtherDocumentFile); var numFiles:int = arr.length; writeObject(numFiles); for (var i:int = 0; I < numFiles, i++) writeObject(arr[i]); And read it back like this: Arr = []; Var numFiles; numFiles = readObject(); for (var i:int = 0; I < numFiles, i++) arr.push(readObject()); If you don't know, how many, you might want to use a tagged file format ________________________________ From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Claudio M. E. Bastos Iorio Sent: Wednesday, August 13, 2008 10:12 PM To: [email protected] Subject: RE: [flexcoders] Re: writeObject() and readObject() Could be. But forgive If I don't realize: how could I read the fileStream in that way? Right now I read it this way: while(stream.bytesAvailable){ arr = stream.readObject() as DocumentFile;//bad cast } I also tried this: arr[0] = stream.readObject() as DocumentFile;//assigns the last DocumentFile saved in the file.. ____________________________________ Claudio M. E. Bastos Iorio From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Alex Harui Sent: Thursday, August 14, 2008 1:21 AM To: [email protected] Subject: RE: [flexcoders] Re: writeObject() and readObject() I would write out the number of DocumentFiles before writing them out, then when reading, I'd read that number and know how many to expect ________________________________ From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Claudio M. E. Bastos Iorio Sent: Wednesday, August 13, 2008 9:13 PM To: [email protected] Subject: RE: [flexcoders] Re: writeObject() and readObject() Thanks for answer. But what can I do if I have many DocumentFile objects written in the file? Is there any way to retrieve all objects or filter by value name/id..? just like a database o e4x.. ____________________________________ Claudio M. E. Bastos Iorio From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Alex Harui Sent: Thursday, August 14, 2008 12:20 AM To: [email protected] Subject: RE: [flexcoders] Re: writeObject() and readObject() If you wrote an instance of DocumentFIle, you need to read back an instance of DocumentFIle ________________________________ From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of slackware2142 Sent: Wednesday, August 13, 2008 5:57 PM To: [email protected] Subject: [flexcoders] Re: writeObject() and readObject() I forgot to mention that I'm using FLEX3 and my class (DocumentFile) is already registered: [RemoteClass(alias="com.DocumentFile")] public class DocumentFile extends EventDispatcher { ... ) ____________________________________ Claudio M. E. Bastos Iorio --- In [email protected] <mailto:flexcoders%40yahoogroups.com> , "slackware2142" <[EMAIL PROTECTED]> wrote: > > Hi! I'm trying to create a simple 'file database' in AIR. > I know I can save and restore objects in AMF format using the methods > write/restoreObject. > > here is my code to save: > > var DocumentToSave:DocumentFile = new DocumentFile (); //DocumentFile > is a custom class > DocumentToSave.Name = 'some name'; > var file:File = File.applicationStorageDirectory.resolvePath > ('myApp.data'); > var stream:FileStream = new FileStream(); > stream.open(file, FileMode.APPEND); > stream.writeObject(DocumentToSave); > > That code is working and stores the DocumentFile objects and values. > But, what can I do to retrieve that objects (or any particular > object). > > I tried this to retrieve: > > var file:File = File.applicationStorageDirectory.resolvePath > ('myApp.data'); > var stream:FileStream = new FileStream(); > stream.open(file, FileMode.READ); > var arr:Array = new Array(); > while(stream.bytesAvailable){ > //what can I use here to create an array of DocumentFiles stored > in 'myApp.data'? > arr = stream.readObject() as Array; //seems to work > } > > trace('new arr length: ' + arr.length);//doesn't work, why?? > > Any help? > > Thanks in advance! > > > ____________________________________ > Claudio M. E. Bastos Iorio >
