Not able to Read Blob ( BlobDomain) Xml Data from DB

I am trying to read a BLOB file from Data base with the below code . However , i am facing 2 challenges - which i need ur help..
1. the data is not in readable format , may be i am missing some more code or encoding somewhere . ( this is how data is printing-- �B�...........)
2. Throwing an exception in the end
The Blob Data types appears as BlobDomain in the entity defination . My jdev is 11.1.1.5
+{+
+..............+
oracle.jbo.domain.BlobDomain  blobDomainXml = (BlobDomain)r.getAttribute("Document");
System.out.println(" XML Out Put = "blobDomainXml);+
+}+
public ViewObject getBlobObject(){
return (ViewObjectImpl)findViewObject("getBlobObject1");
below is exception after the call ---
Caused by: java.lang.NullPointerException
     at oracle.jbo.server.ViewRowSetIteratorImpl.getViewObject(ViewRowSetIteratorImpl.java:238)
     at oracle.jbo.server.ViewRowSetIteratorImpl.getSyncLock(ViewRowSetIteratorImpl.java:178)
     at oracle.jbo.server.ViewRowSetIteratorImpl.hasNext(ViewRowSetIteratorImpl.java:1904)
     at com.stryker.gtc.view.bean.LoginPageName.getBlob(LoginPageName.java:243)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:597)
     at com.sun.el.parser.AstValue.invoke(Unknown Source)
     at com.sun.el.MethodExpressionImpl.invoke(Unknown Source)
     at org.apache.myfaces.trinidadinternal.taglib.util.MethodExpressionMethodBinding.invoke(MethodExpressionMethodBinding.java:53)

The Blob xml has used some encoding . If i use the below italic code in main class , i can get the proper xml . However , It uses the blob resultset but I get exception if i try with ADF blob domain .
below is the code in a simple main method class and gives me the desired xml .
ResultSet rset = statement.executeQuery("Select * from XML_DOCUMENT where DOCUMENT_ID=(Select DOCUMENT_ID from DOCUMENT_DLV_MSG_REF where MESSAGE_GUID = (Select MESSAGE_GUID from DLV_MESSAGE \n" +
"where CIKEY = (Select CIKEY from CUBE_INSTANCE where CMPST_ID='1931038')))");
+try {+
XMLDOMImplementation domimpl = new XMLDOMImplementation();
+while (rset.next()) {+
BinXMLProcessor proc =  BinXMLProcessorFactory.createProcessor()  ;
BinXMLStream inpbin = proc.createBinXMLStream(rset.getBlob("DOCUMENT"));
BinXMLDecoder dec = inpbin.getDecoder();
InfosetReader xmlreader = dec.getReader();
XMLDocument doc = (XMLDocument)domimpl.createDocument(xmlreader);
doc.print(System.out);
+}+
+} catch (Exception e) {+
System.out.println(" Exception ="e);+
+}+
But , In ADF we have Blob Domian in the entity defination , auto generated ...
Row r = iter.next();
oracle.jbo.domain.BlobDomain blob = (*BlobDomain*)r.getAttribute("Document");
try
XMLDOMImplementation domimpl = new XMLDOMImplementation();
BinXMLProcessor proc = BinXMLProcessorFactory.createProcessor() ;
BinXMLStream inpbin = proc.createBinXMLStream(blob.getInputStream());
BinXMLDecoder dec = inpbin.getDecoder();
InfosetReader xmlreader = dec.getReader();
now in the above higlighted code I get java.lang.IllegalArgumentException . I do not find a way to convert BlobDomain to blob . even no decoder in blob Domain .
May be you can help ..
Edited by: Amitava Biswas on Sep 12, 2012 11:13 AM

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