Re: Problems Serializing a SVGDocument

[TJ Teegan]

Hello again,
I think I figured out how to go from the DOM in a string representaion back 
to a SVGDocument (See Below).

This seems to work.  My question is if this is the most efficient way to do 
it, and also is the line doc = f.createDocument(null, sr) going to cause me 
trouble in the future, specificly is it ok to use null in the call to 
createDocument, or will this come back to bite me later on?

//Put the DOM into a string, see the method below.
String DOMString = svgToString();
public void myMethod(String DOMString){
       org.apache.batik.dom.svg.SAXSVGDocumentFactory f;
        org.w3c.dom.Document doc = null;
       java.io.StringReader sr;
       try {
           String parser = 
org.apache.batik.util.XMLResourceDescriptor.getXMLParserClassName();
           f = new org.apache.batik.dom.svg.SAXSVGDocumentFactory(parser);
           sr = new java.io.StringReader(this.writeSVGToString());
           doc = f.createDocument(null, sr);
       } catch (java.io.IOException ex) {
           ex.printStackTrace();
       }
       SVGCanvas.setSVGDocument((SVGDocument)doc);
   }

Thank you,
TJ
From: "TJ Teegan" <[EMAIL PROTECTED]>
Reply-To: "Batik Users" <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: Re: Problems Serializing a SVGDocument
Date: Mon, 13 Dec 2004 09:32:50 -0600
Thank you for the quick response.
I have sort of found a work around.  I just dump the DOM into a string like 
this:
public String svgToString(){
       //Outputs the contents of the entire current DOM as a single string
       StringWriter writer;
       String svg;

       svg = null;
       try{
           writer = new StringWriter();
           DOMUtilities.writeDocument(SVGDoc, writer);
           writer.close();
           svg = writer.toString();
       }catch (IOException e){
           e.printStackTrace();
       }
       return svg;
   }
Now I have the entire DOM as a single string, which I can serialize.  But I 
cannnot quite figure out how to get this string back into a Document, or 
SVGDocument, so I can display it on a jSVGCanvas.

I was looking around the website, but I could not find anything.  Is this 
possible?  If so, what should I be looking at to figure out how to do it?

Once again, any help is greatly appreciated.
Thank you,
TJ Teegan
From: Thomas DeWeese <[EMAIL PROTECTED]>
Reply-To: "Batik Users" <[EMAIL PROTECTED]>
To: Batik Users <[EMAIL PROTECTED]>
Subject: Re: Problems Serializing a SVGDocument
Date: Mon, 13 Dec 2004 10:20:02 -0500
Hi TJ,
TJ Teegan wrote:
I am trying to serialize a SVGDocument using the following code:
   Our DOM is not serializable, I don't really know if there
are really deep issues (I would expect there are) or not.
   You can usually serialize to XML of course.
public byte[] convertObjectToBytes(Object o){
       byte[] bytes;
       ObjectOutputStream oos;
       ByteArrayOutputStream byteStreamOut;
       //object o must implement the Serializable interface
       bytes = new byte[0];
       try{
           //write the object to a bit stream
           byteStreamOut = new ByteArrayOutputStream();
           oos = new ObjectOutputStream(byteStreamOut);
           oos.writeObject(o);
           bytes = byteStreamOut.toByteArray();
       }catch(IOException e){
           e.printStackTrace();
       }
       return bytes;
   }
I call the method like this:
byte[] b = convertObjectToBytes(svgCanvas.getSVGDocument()):
I get the following error:
java.io.NotSerializableException: org.apache.batik.css.engine.StyleMap
       at 
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1054)
       at 
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1332)
       at 
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1304)
       at 
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1247)

       at 
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1052)
       at 
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1332)
       at 
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1304)
       at 
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1247)

       at 
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1052)
       at 
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1332)
       at 
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1304)
       at 
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1247)

       at 
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1052)
       at 
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1332)
       at 
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1304)
       at 
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1247)

       at 
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1052)
       at 
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1332)
       at 
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1304)
       at 
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1247)

       at 
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1052)
       at 
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1332)
       at 
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1304)
       at 
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1247)

       at 
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1052)
       at 
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1332)
       at 
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1304)
       at 
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1247)

       at 
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1052)
       at 
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1332)
       at 
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1304)
       at 
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1247)

       at 
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1052)
       at 
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1332)
       at 
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1304)
       at 
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1247)

       at 
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1052)
       at 
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1332)
       at 
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1304)
       at 
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1247)

       at 
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1052)
       at 
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1332)
       at 
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1304)
       at 
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1247)

       at 
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1052)
       at 
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1332)
       at 
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1304)
       at 
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1247)

       at 
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1052)
       at 
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1332)
       at 
java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1304)
       at 
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1247)

       at 
java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1052)
       at 
java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:278)
       at apt.onRequest.net.NetIO.convertObjectToBytes(NetIO.java:66)
       at 
apt.onRequest.gui.DrawingPanel.testSave(DrawingPanel.java:2192)
       at apt.onRequest.gui.DrawingPanel.zoomIn(DrawingPanel.java:282)
       at 
apt.onRequest.gui.MainScreen.btnZoomInActionPerformed(MainScreen.java:471)
       at apt.onRequest.gui.MainScreen.access$700(MainScreen.java:17)
       at 
apt.onRequest.gui.MainScreen$8.actionPerformed(MainScreen.java:200)
       at 
javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1786)
       at 
javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1839)

       at 
javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)

       at 
javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
       at 
javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:245)

       at 
java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:231)
       at java.awt.Component.processMouseEvent(Component.java:5100)
       at java.awt.Component.processEvent(Component.java:4897)
       at java.awt.Container.processEvent(Container.java:1569)
       at java.awt.Component.dispatchEventImpl(Component.java:3615)
       at java.awt.Container.dispatchEventImpl(Container.java:1627)
       at java.awt.Component.dispatchEvent(Component.java:3477)
       at 
java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3483)
       at 
java.awt.LightweightDispatcher.processMouseEvent(Container.java:3198)
       at 
java.awt.LightweightDispatcher.dispatchEvent(Container.java:3128)
       at java.awt.Container.dispatchEventImpl(Container.java:1613)
       at java.awt.Window.dispatchEventImpl(Window.java:1606)
       at java.awt.Component.dispatchEvent(Component.java:3477)
       at java.awt.EventQueue.dispatchEvent(EventQueue.java:456)
       at 
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)

       at 
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)

       at 
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
       at 
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
       at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)

Is there anyway around this error?  I apologize if this already been 
covered.  I searched the mailing list archives, but could not find an 
answer.  Any help is greatly appreciated.

Thank you,
TJ Teegan
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Security. http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963

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