db-derby-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "kishorevodnala (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-2070) Is there a way to initialise a BLOB in derby, and how to insert a document object in Derby
Date Sun, 12 Nov 2006 23:13:53 GMT
    [ http://issues.apache.org/jira/browse/DERBY-2070?page=comments#action_12449195 ] 
            
kishorevodnala commented on DERBY-2070:
---------------------------------------


Hi Anurag,

Many thanks for your quick response.
Please see the following code.here i made Document object as serializable.even then it is
giving the same Exception.

class SerialPDX implements Serializable {
    public Document PDXDoc;
    public SerialPDX(Document PDXDoc) {
        this.PDXDoc = PDXDoc;
    }
}

SerialPDX serializedPDXDocument = new SerialPDX(obj);//here converting document object as
a serializable object.
									//obj is a document object.


Also please let me confirm that is there any way to initialise BLOB in derby like in Oracle.


Thanks with Regards
Kishore Vodnala




> Is there a way to initialise a BLOB in derby, and how to insert a document object in
Derby
> ------------------------------------------------------------------------------------------
>
>                 Key: DERBY-2070
>                 URL: http://issues.apache.org/jira/browse/DERBY-2070
>             Project: Derby
>          Issue Type: Bug
>         Environment: Windows 98,Derby ,JAVA.
>            Reporter: kishorevodnala
>
> I have a problem while inserting an XML document object into a BLOB column in Derby database.
> Could you please help me out in resolving this problem.
> Note:there is empty_blob function in oracle for initialising a BLOB.Is there anything
in derby for initialising a BLOB like in oracle.
> Following is the sample code.
> //creating a DOM object for a xml file and storing this object into the BLOB column in
the database using streams.
> class exdom
> {
> 	public static void main(String ss[])
> 	{
> 		Document pdxDOM =buildDocument();//creating a DOM object for xml file
> 		serializePDXDOMToDB(pdxDOM); //storing this object into the BLOB column in the database
using  streams 
> 	}
>      public static Document buildDocument() {
>         Document document = null;
>         try {
>             DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
>             DocumentBuilder documentBuilder = builderFactory.newDocumentBuilder();
>             document = documentBuilder.parse(new File("d:\\sample.xml"));
>         }  catch (Exception e) {e.printStackTrace();}
>             
>         return document;
>     }
> 	 public static void serializePDXDOMToDB(Document obj) {
>         Connection conn = null;
>     	        PreparedStatement ps = null;
>         ResultSet rs = null;
>         String query = "insert into ex9(bl) values(?) " ;
>         
>         try {
>         	Class.forName("org.apache.derby.jdbc.ClientDriver");
> 			String url="jdbc:derby://s104f50:1527/example;create=true";
> 			 conn=DriverManager.getConnection(url);
>         	 
> 	            ps = conn.prepareStatement(query);
> 	            ByteArrayOutputStream baos = new ByteArrayOutputStream();
> 	            ObjectOutputStream oout = new ObjectOutputStream(baos);
> 	            oout.writeObject(obj);
> 	            oout.close();
> 	            
> 	            ps.setBytes(1, baos.toByteArray());
> 	            ps.execute();
> 	             
>                 
> 			
> 		}catch(Exception e){e.printStackTrace();}
> 	 }
> }
>  
> Following is the exception that occured while execution:
> java.io.NotSerializableException: org.apache.crimson.tree.XmlDocument
>         at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1054)
>         at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java
> :1330)
>         at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:13
> 02)
>         at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.jav
> a:1245)
>         at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1052)
>         at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:278)
>         at exdom.serializePDXDOMToDB(exdom.java:42)
>         at exdom.main(exdom.java:11)
> //this code is working fine for String and Integer objects but getting an Exception while
trying to insert an XML Document object.

-- 
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message