RE: How to add types in SDO on the fly?

[Millies, Sebastian]

Hello Raman,

here’s an example :


private Type theType;

private void createType()
  {
    HelperContext ctx = HelperProvider.getDefaultContext();
    // define a new type
    DataObject typeDef = ctx.getDataFactory().create( "commonj.sdo", "Type" );
    typeDef.set( "uri", "http://namespacei/file"; );
    typeDef.set( "name", "FileType" );
    // add properties
    DataObject propDef;
    propDef = typeDef.createDataObject( "property" );
    propDef.set( "name", "id" );
    propDef.set( "type", ctx.getTypeHelper().getType( "commonj.sdo", "String" ) 
);
    propDef = typeDef.createDataObject( "property" );
    propDef.set( "name", "fileName" );
    propDef.set( "type", ctx.getTypeHelper().getType( "commonj.sdo", "String" ) 
);
    propDef = typeDef.createDataObject( "property" );
    propDef.set( "name", "lastModified" );
    propDef.set( "type", ctx.getTypeHelper().getType( "commonj.sdo", "Date" ) );
    propDef = typeDef.createDataObject( "property" );
    propDef.set( "name", "length" );
    propDef.set( "type", ctx.getTypeHelper().getType( "commonj.sdo", "Long" ) );
    // define the type
    theType = ctx.getTypeHelper().define( typeDef );
  }


SDOs can be created just like XSD-based ones, e.g.

private DataObject createDataObject( File file )
  {
    HelperContext ctx = HelperProvider.getDefaultContext();
    DataFactory df = ctx.getDataFactory();
  // create object of dynamically defined type
    DataObject sdo = df.create( theType );
    sdo.setString( "id", file.getPath() );
    sdo.setString( "fileName", file.getName() );
    sdo.setDate( "lastModified", new Date() );
    return sdo;
  }


n  Sebastian

From: Malisetti, Ramanjaneyulu [mailto:ramanjaneyulu.malise...@ca.com]
Sent: Wednesday, December 05, 2012 1:32 PM
To: user@tuscany.apache.org
Subject: How to add types in SDO on the fly?

Hi,
       I am familiar with XSDHelper.define(XSD) to load types into SDO runtime. 
We have a requirement to add types at runtime without XSD file. How to achieve 
that? Any idea?

Regards
Raman
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