[SOLVED] Get the JPA filed name when we extended the metadata in olingo

Get the JPA filed name when we extended the metadata in olingo

Here it has been explained how can we extend metadata of an oData service in olingo V2.

<JPAEntityType name="SalesOrderHeader">
   <EDMEntityType>SalesOrder</EDMEntityType> 
   <EDMEntitySet>SalesOrders</EDMEntitySet> 
   <JPAAttributes>
       <JPAAttribute name="soId">ID</JPAAttribute> 
       <JPAAttribute name="netAmount">NetAmount</JPAAttribute> 
       <JPAAttribute name="buyerAddress">BuyerAddressInfo</JPAAttribute> 
   </JPAAttributes>
   <JPARelationships>
       <JPARelationship name="salesOrderItem">SalesOrderLineItemDetails</JPARelationship> 
       <JPARelationship name="notes">NotesDetails</JPARelationship> 
    </JPARelationships>
</JPAEntityType>

This small snippet of code explained how I can change a JPA entity field's name buyerAddress to the new name BuyerAddressInfo.

Now the question is how can I access to the original name when I have access to BuyerAddressInfo and ODataJPAContext?

Solution

I discovered following method from here. By this method I can access BuyerAddressInfo by having buyerAddress and JPA Entity name!

import org.apache.olingo.odata2.jpa.processor.api.access.JPAEdmMappingModelAccess;
import org.apache.olingo.odata2.jpa.processor.api.factory.ODataJPAFactory;
// .....
JPAEdmMappingModelAccess jpaEdmMappingModelAccess = 
ODataJPAFactory.createFactory().getJPAAccessFactory().getJPAEdmMappingModelAccess(oDataJPAContext);
jpaEdmMappingModelAccess.loadMappingModel();
String newName = jpaEdmMappingModelAccess.mapJPAAttribute("SalesOrderHeader", "SalesOrderHeader"));

However what I am looking for is exactly vice versa! Therefore at the moment I use a Map and collect all the pairs and each time I iterate over them!