[CAMEL-17506] olingo4 should always look for a single entity when a predicate key is used

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.25.2, 3.14.0
• Fix Version/s: 3.14.1, 3.15.0
• Component/s: camel-olingo4
• Estimated Complexity: Unknown
• Assignee: Unassigned
• Reporter: Damien B
• Created: 17/Jan/22 14:51
• Updated: 18/Jan/22 18:20
• Resolved: 18/Jan/22 18:20

Description

In org.apache.camel.component.olingo4.api.impl.Olingo4AppImpl , the following snippet of code is used to decide wether we receive an entity or an entitySet on a read query with a keyPredicate:

List<UriParameter> keyPredicates = uriResourceEntitySet.getKeyPredicates();
// Check result type: single Entity or EntitySet based
// on key predicate detection
if (keyPredicates.size() == 1) {
  response = (T) odataReader.readEntity(content, getResourceContentType(uriInfo));
} else {
  response = (T) odataReader.readEntitySet(content, getResourceContentType(uriInfo));
} 

It assumes that if we have multiple parts in the key predicate, then we expect several entities in the response. But as we can see in OData Version 4.01. Part 2: URL Conventions (oasis-open.org) 4.3.6 example 26, a key predicate with several parts is just that, a multi-part key predicate still adressing a single entity.

Issue Links

• links to: GitHub Pull Request #6781