Making an object serializable
Hey guys, im new at this so i dont know almost anything about serialization, so here's my problem:
Got an array of an object "Article" that i defined, wanna write it to a file but i get the "NotSerializableException",
here's my object's constructor:
Article (String n, int u, float p)
name = n;
amount = u;
price = p;
fmt = new DecimalFormat ("0.##");
by the way, all of the variables are private, i dont have any problem storing several articles in my array, i just get my exception at runtime here:
public static void save(Object obj, String nombrearch) throws IOException
ObjectOutputStream objstream = new ObjectOutputStream(new FileOutputStream(nombrearch));
objstream.writeObject(obj);
objstream.close();
apologizing for inconviniences, hope you can help me work this out
sanu018 wrote:
When ever u are writing to a stream all the objects that u r exporting should be serializable. Primitive types are as such non serializable so replace all those int with Integer type objects.Absolute total rubbish. Just pure bullshit.
If you don't have a clue what you're talking about then please don't offer "advice" on these forums.
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Welcome!
I'm making a net game using RMI and I have this problem.
When I'm trying to join my client with the server an error occures:
Error: error marshalling arguments; nested exception is:
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My client contains an Object extending a JPanel class. There are 2D object used to make the map, and that's why this error occures.
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Big thanks to anybodey who will help.
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Hi,
I am developing a routing server in Java
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To unsubscribe, email '[email protected]' with
'unsubscribe forte-users' as the body of the message.
Searchable thread archive <URL:http://pinehurst.sageit.com/listarchive/forte>JavaFunda wrote:
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Once we we write the object to outputstream or some text file, how does it get transmitted over network?The same way any other bytes get transmitted. You have a Socket. You get its OutputStream. You wrap that in an ObjectOutputStream. When you write to the ObjectOutputStream, that writes through to the Socket's OutputStream, which is responsible for putting the bytes on the wire.
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Hi,
Could someone explain the concept of Runtime Object Serialization with a simple example?
Thanksimport java.io.*;
/* you NEED to make the class implement Serializable */
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private String address;
public String getName() { return name; }
public String getAddress() { return address; }
public void setName(String name) { this.name = name; }
public void setAddress(String address) { this.address = address; }
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oos.close();
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Hi,
When writing a vector of my own objects out to a file, do the objects need to be serializable even though it is actually the vector I am outputting?
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SetAttribute() makes object serializable Recursively ?
Hi everyone,
could anyone answer me whether httpSession.setAttribute(key, very big object)
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thanks,
jyothi
But you can't serialize an Object that isn't Serializable somewhere in it's
inheritance. A method can't make an Object Serializable.
"jyothi" <[email protected]> wrote in message
news:[email protected]...
>
> But i read clearly some where in bea online manual that use
setAttribute() which
> makes the object searializable. So I wonder whether this
setAttribute() does
> the searlization recursively ?
>
> thanks,
> jyothi
>
> "justin" <[email protected]> wrote:
> >
> >Cluster requirement is that all objects placed in a session should be
> >serializable.
> >So your Big objects with small object which are not serializable is going
> >to be
> >a problem.
> >
> >"jyothi" <[email protected]> wrote:
> >>
> >>Hi everyone,
> >>
> >>could anyone answer me whether httpSession.setAttribute(key, very
> >>big object)
> >> makes the object serializable recursively.
> >>
> >>What I mean is, I am storing an object bigObject in http session using
> >> setAttribute().
> >> This bigObject contains several other objects which are not serialized.
> >>
> >>But I have read that setAttribute() makes the object serializable.
> >>
> >>So, does it mean that all the objects stored in bigObject also will
> >>be serialized
> >>?
> >>
> >>thanks,
> >>jyothi
> >
>
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Object serialization failure during OutOfMemory error (EOFException)
Hello all,
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Message was edited by:
jkhoa
Message was edited by:
jkhoa -
Object Serialization and IO Error
Hi,
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s_man.setClasses(c);
s_man.setIndex(i);
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public synchronized Object readObjects() {
if (!objectdatafile.exists())
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Object o = new Object();
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FileInputStream istream = new FileInputStream(objectdatafile);
ObjectInputStream pack = new ObjectInputStream(istream);
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istream.close();
catch (Exception e) {
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at java.io.ObjectInputStream$BlockDataInputStream.peekByte(ObjectInputStream.java:2426)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1238)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:325)
at java.util.Hashtable.readObject(Hashtable.java:799)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:42)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:28)
at java.lang.reflect.Method.invoke(Method.java:327)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:812
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1736)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1
639)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1267)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:325)
at DiskManager.readObjects(DiskManager.java:165)
at DiskManager.loadData(DiskManager.java:42)
at LoadDataAction.run(LoadDataAction.java:30)
at java.lang.Thread.run(Thread.java:539)
java.lang.ClassCastException: java.lang.Object
at DiskManager.loadData(DiskManager.java:42)
at LoadDataAction.run(LoadDataAction.java:30)
at java.lang.Thread.run(Thread.java:539)
I would like to repeat that I am not getting this error everytime, but about once every two runs. Please share your feelings about possible errors I am making or if there is an inherent bug with serialization of hashtables.
Thanksthe java.io.EOFException looks like you did not properly close the stream on writing. to me this seems like there is an error in the writing code rather than the reading code. although there are some things you can improve...
robert -
How Would One Go About Making an Object Rotate to Face in Direction of Mouse?
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Warning: 1090: Migration issue: The onMouseMove event handler is not triggered automatically by Flash Player at run time in ActionScript 3.0. You must first register this handler for the event using addEventListener ( 'mouseMove', callback_handler).
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(attached is a snapshot of the various objects refered to in the code. also the original code is attached to the original post. in case these help at all.) -
Object Serialization(Materialization and Dematerialization)
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It is amazingly tedious (not to mention inefficient) to recreate the entire object from the database. This is even more so because I've implemented the Event Notification pattern, such that when say a book is deleted, the members who have reserved it are notified. The whole point of the Event Notification mechanism is so that the object being watched does not need to know of the objects which need to be notified on a state change. However, I've found it necessary to re-attach all the listeners on an object when it is materialized from the DB, defeating the purpose of the pattern.
Complex object relationships are mapped poorly and recursive materialization leads to slow response times. If a Group object has a Vector of Members and other Groups, then whenever a Group object is materialized, all its constituent Members and Group objects also need to be materialized. (I understand O/R frameworks solve this through lazy instantiation)
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Script for making an object the artboard size.
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Below is a script that I saw on here that I believe may contain what I need but now knowing programming I have no idea where to start on editing. All I need is the part where an object is placed on the artboard that is the exact same size as the artboard. If anyone can advise on editing I would greatly apprecaite it.
#target illustrator
function main() {
if (app.documents.length == 0) {
alert('Open a document before running this script');
return; // Stop script here no doc open…
} else {
var docRef = app.activeDocument;
with (docRef) {
if (selection.length == 0) {
alert('No items are selected…');
return; // Stop script here with no selection…
if (selection.length > 1) {
alert('Too many items are selected…');
return; // Stop script here with selection Array…
} else {
var selVB = selection[0].visibleBounds;
var rectTop = selVB[1] + 36;
var rectLeft = selVB[0] - 36;
var rectWidth = (selVB[2] - selVB[0]) + 72;
var rectHeight = (selVB[1] - selVB[3]) + 72;
selection[0].parent.name = 'CC';
selection[0].filled = false;
selection[0].stroked = true;
var ccColor = cmykColor(0, 100, 0, 0);
var ccCol = spots.add()
ccCol.name = 'CC';
ccCol.color = ccColor;
ccCol.tint = 100;
ccCol.colorType = ColorModel.SPOT;
var cc = new SpotColor();
cc.spot = ccCol;
selection[0].strokeColor = cc;
selection[0].strokeWidth = 1;
var tcLayer = layers.add();
tcLayer.name = 'TC';
var padBox = pathItems.rectangle(rectTop, rectLeft, rectWidth, rectHeight, false);
padBox.stroked = false;
padBox.filled = true;
var tcColor = cmykColor(0, 100, 90, 0);
var tcCol = spots.add()
tcCol.name = 'TC';
tcCol.color = tcColor;
tcCol.tint = 100;
tcCol.colorType = ColorModel.SPOT;
var tc = new SpotColor();
tc.spot = tcCol;
padBox.fillColor = tc;
padBox.move(docRef, ElementPlacement.PLACEATEND);
artboards[0].artboardRect = (padBox.visibleBounds);
redraw();
rectWidth = (rectWidth-72)/72;
rectWidth = roundToDP(rectWidth,1);
rectHeight = (rectHeight-72)/72;
rectHeight = roundToDP(rectHeight,1);
var textString = rectWidth + ' x ' + rectHeight;
prompt('Copy Me', textString);
main();
function roundToDP(nbr, dP) {
dpNbr = Math.round(nbr*Math.pow(10,dP))/Math.pow(10,dP);
return dpNbr;
function cmykColor(c, m, y, k) {
var newCMYK = new CMYKColor();
newCMYK.cyan = c;
newCMYK.magenta = m;
newCMYK.yellow = y;
newCMYK.black = k;
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#target Illustrator
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// script.description = resizes selected object to fit exactly to Active Artboard Bounds;
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// script.parent = carlos canto // 01/25/12;
// script.elegant = false;
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selec = idoc.selection;
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var doch = idoc.height;
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var sel = idoc.selection[0];
var selVB = sel.visibleBounds;
var selVw = selVB[2]-selVB[0];
var selVh = selVB[1]-selVB[3];
var selGB = sel.geometricBounds;
var selGw = selGB[2]-selGB[0];
var selGh = selGB[1]-selGB[3];
// get the difference between Visible & Geometric Bounds
var deltaX = selVw-selGw;
var deltaY = selVh-selGh;
if (sel.width > sel.height) {
var newWidth = docw-deltaX;
var ratio = sel.width / newWidth;
sel.width = newWidth; // width is Geometric width, so we need to make it smaller...to accomodate the visible portion.
sel.height = sel.height * ratio;
} else {
var newHeight = doch-deltaY;
var ratio = sel.height / newHeight;
sel.height = newHeight;
sel.width = sel.width / ratio;
sel.top = (doch / 2) - (sel.height / 2);
sel.left = (docw / 2) - (sel.width / 2);
else
alert("select ONE object before running"); -
Bussiness object serialization problem
Hi, I have a little problem with serialization, when I want to create xml from Business object. Example:
MyBoObject obj = new MyBoObject ();
obj.atr1 = "aaa";
obj.atr2 = "bbb";
String xml = DynamicXml.createXmlTextFor(object : obj, topLevelTag : "something");
display(xml);
And displayed result is:
<something>
<atr2>bbb</atr2>
</something>
atr1 is attribute, which is inherited from db table.
atr2 is atribute, which I created (it is not inherited from db table)
Whole problem is, that it only serialize atr2 - from some reason it completely ignores atr1 and his value.
Like I can't serialize attributes, which are inherited from db table.
But when I created new attribute atr2 in my Business Object (which is not inherited from db table), everything work ok. Where's the problem? I read docs, but found nothing...
Edited by: user12189610 on Nov 9, 2009 2:42 AM
Edited by: user12189610 on Nov 9, 2009 2:46 AMIf you need a simple project that duplicates this problem for customer support, here's where I put one: http://www.4shared.com/file/181611971/d21e9444/_2__DynamicXMLBug.html.
Have them import the project, start Studio's Engine, login as "test" and start the Workspace. Create a work item instance and then run the work item when it reaches the "Test" activity. When you run the logic, you'll see this displayed:
<?xml version="1.0" encoding="UTF-8"?>
<poHeir xmlns="http://bea.com/albpm/DynamicXml/version/2.0">
<nameForPO>Dan</nameForPO>
</poHeir>They should note that only the "nameForPO" tag is created by the DynamicXml.createXmlTextFor() method. "nameForPO" is an attribute I manually added to the XML Heir BPM Object. The attributes of the inherited heir (e.g. "poHeir.orderDate" and "poHeir.billTo") are not included as tags in the generated XML even though these attributes have been set in the logic.
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