Map oracle 9 BLOB type

I am trying to map a BLOB database object to a java object using typeconversion with TopLink version 9.0.4.1 (build 040128).
How do I map a BLOB database type? I tried to map it to oracle.sql.BLOB object in my class, (private BLOB m_blobField) but I get an error message:
Local Exception Stack:
Exception [TOPLINK-3001] (OracleAS TopLink - 10g (9.0.4.1) (Build 040128)): oracle.toplink.exceptions.ConversionException
Exception Description: The object [[B@1bdc9d8], of class [class [B], could not be converted to [class oracle.sql.BLOB].
     at oracle.toplink.exceptions.ConversionException.couldNotBeConverted(ConversionException.java:35)
     at oracle.toplink.internal.helper.ConversionManager.convertObject(ConversionManager.java:154)
     at oracle.toplink.internal.databaseaccess.DatabasePlatform.convertObject(DatabasePlatform.java:562)
     at oracle.toplink.mappings.DirectToFieldMapping.getAttributeValue(DirectToFieldMapping.java:224)
     at oracle.toplink.mappings.TypeConversionMapping.getAttributeValue(TypeConversionMapping.java:41)
     at oracle.toplink.mappings.DirectToFieldMapping.valueFromRow(DirectToFieldMapping.java:458)
     at oracle.toplink.mappings.DatabaseMapping.readFromRowIntoObject(DatabaseMapping.java:860)
     at oracle.toplink.internal.descriptors.ObjectBuilder.buildAttributesIntoObject(ObjectBuilder.java:164)
     at oracle.toplink.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:322)
     at oracle.toplink.internal.descriptors.ObjectBuilder.buildObjectsInto(ObjectBuilder.java:380)
     at oracle.toplink.internal.queryframework.DatabaseQueryMechanism.buildObjectsFromRows(DatabaseQueryMechanism.java:146)
     at oracle.toplink.queryframework.ReadAllQuery.execute(ReadAllQuery.java:425)
     at oracle.toplink.queryframework.DatabaseQuery.execute(DatabaseQuery.java:493)
     at oracle.toplink.queryframework.ReadQuery.execute(ReadQuery.java:111)
     at oracle.toplink.publicinterface.Session.internalExecuteQuery(Session.java:1958)
     at oracle.toplink.publicinterface.Session.executeQuery(Session.java:1086)
     at oracle.toplink.publicinterface.Session.executeQuery(Session.java:1038)
     at oracle.toplink.publicinterface.Session.readAllObjects(Session.java:2372)
     at com.starhometest.Tests.RunTest.testBlob(RunTest.java:158)
     at com.starhometest.Tests.RunTest.main(RunTest.java:59)
     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:324)
     at com.intellij.rt.execution.application.AppMain.main(AppMain.java:78)
Exception in thread "main"
Trying to map it to the Blob interface also doesn't work.
Can anyone help?

BLOB should be mapped to a byte array using TypeConversionMapping with a target type java.sql.Blob. Also Oracle8Platform or Oracle9Platform should be used.
For more details please see http://www.oracle.com/technology/products/ias/toplink/technical/tips/LOB/index.html

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