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Large objects (BLOB) [message #612629]

Wed, 21 November 2007 10:32

Alex Mising name

Messages: 149
Registered: March 2010

Senior Member

Hi,

I'm trying to persist binary objects using Teneo. What's the suggested
method of doing that? I tried using the EByteArray data type, as it was
the closest one to a BLOB I could find. Here's an example model:

<eClassifiers xsi:type="ecore:EClass" name="Document">
<eStructuralFeatures xsi:type="ecore:EAttribute" name="filename"
eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
<eStructuralFeatures xsi:type="ecore:EAttribute" name="content"
eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EByteArray"/>
</eClassifiers>

Teneo creates a table "document_content" and creates a row each byte in
the array.

The only relevant documentation I found was:
http://www.elver.org/hibernate/ejb3_features.html#lob_notes
My model is not written as an XML schema. How does this map to a .ecore
specification?

P.S. I use hibernate 3.2.5 and Derby as the database backend.

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