[jira] [Created] (UIMA-6393) Circular imports break resource manager cache

[Richard Eckart de Castilho (Jira)]

Richard Eckart de Castilho created UIMA-6393:
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             Summary: Circular imports break resource manager cache
                 Key: UIMA-6393
                 URL: https://issues.apache.org/jira/browse/UIMA-6393
             Project: UIMA
          Issue Type: Bug
          Components: UIMA
            Reporter: Richard Eckart de Castilho
            Assignee: Richard Eckart de Castilho
             Fix For: 3.2.1SDK


When a set of descriptors (e.g. {{TypeSystemDescription}}s) import each other, 
this can break the import cache in the {{ResourceManager}}.

Consider the case of two type systems, each defining exactly one type:

* {{Circular1.xml}} imports {{Circular2.xml}}
* {{Circular2.xml}} imports {{Circular1.xml}}

Then run the following code:

{code}
  @Test
  public void thatCircularImportsDoNotConfuseResourceManagerCache() throws 
Exception {
    ResourceManager resMgr = newDefaultResourceManager();
    File descriptor = getFile("TypeSystemDescriptionImplTest/Circular1.xml");
    TypeSystemDescription ts = xmlParser.parseTypeSystemDescription(new 
XMLInputSource(descriptor));
    ts.resolveImports(resMgr);
    TypeSystemDescription tsd = (TypeSystemDescription) 
resMgr.getImportCache().values().iterator()
            .next();
    assertThat(ts.getTypes()).hasSize(2);
    
    TypeSystemDescription cachedTsd = (TypeSystemDescription) 
resMgr.getImportCache().values().iterator()
            .next();
    assertThat(cachedTsd.getTypes()).hasSize(2);
  }
{code}

This code loads the first type system and resolves its imports. The resolved 
type system {{Circular1}} contains two types at the end - fine.

However, {{Circular2}} is cached in the resource manager - and if we fetch it 
from there, then we get it back without any imports and only containing a 
single type. The type it should have imported from {{Circular1}} is not there.



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