* Ensure IDs within CQL files match the library identifiers used.  Fix all tests to comply with this new edict.  Add another test class toe exercise this logic specifically.

* Validate identifiers for ELM as well.

* Add debug for failing tests.

* Try again to add debugging.

* Resolve CQL file casing issues that only manifest themselves on Linux.

* Spotless.

* Add ELM tests for the versioned identifier logic with a simple ELM JSON file.

* Fix sonar issues.

* More sonar.

* Fixed check access level being called on null result

* Add tests, change fix

---------

Co-authored-by: JP <jonathan.i.percival@gmail.com>

* Fixed check access level being called on null result

* Add tests, change fix

* Add a test for a private codesystem reference

* fixed bad master merge

* Fix sonar warnings

---------

Co-authored-by: Bryn Rhodes <bryn@databaseconsultinggroup.com>

… insertion (#1593)

* Use IdentityHashMaps instead of HashMaps where keys are mutated after insertion

* Use IdentityHashMaps instead of HashMaps where keys are mutated after insertion

* Use IdentityHashMaps instead of HashMaps where keys are mutated after insertion

* First attempt to evaluate mulitple libraries without a cache refresh, namely, by initializing them in order and then evaluating their expressions in reverse order.

* Remove duplicate initializeState and setParameters that was wrongly resulting in correct results.  Ensure that when evaluating expressions that we pop the current library off the deque but not too soon, so the reverse order evaluation actually works.  Add more TODOs.

* Make use of the new evaluate measure code from at least one single library call.  Fixed invalid error handling before.  All tests pass.

* Leave the existing single library evaluation the same as before.  Ensure that the new multi-library fails on library ID and CQL ID mismatches.

* Pull changes for versioned identifier validating branch.

* Spotless.

* Start merging the old and new code bases for compiling and validating libraries in LibraryManager.   Ensure all tests pass.

* Improve matching Libraries with queried identifiers and solidifying versionless identifier searching.

* Add logging and TODOs, which may be temporary.

* Support multi-measure error handling and partial error handling thought a series of bespoke combined result and error classes.

* Fix bad merge from master.

* Fix partial error handling scenario.

* Spotless.

* Clear out the evaluatedResources stack after evaluating each set of expressions for each library in the multi-lib scenario.  Start writing tests to ensure it all behaves as expected, for now only covering

* Enhance tests and rename them to make it clear they're for linear multiple deps.   Add convenience methods to result class.  Fix bug with partially cached multiple libs.  Ensure we handle  the non Cache.READ_WRITE case.

* Spotless.

* Add failing test for mismatched libraries due to caching order.

* Fix bug and spotless.

* First steps to setting up multi-layer CQL tests.

* Improve testing for complex library dependencies but the work is still not done.

* More improvements to testing but more work to be done on complex scenarios.

* All tests pass for complex scenario.  Pave the way for making CQL loading more efficient.

* Add TODOs

* Add small tweaks to error handling and bump to a new version higher than master.

* Start cleaning up cruft and TODOs and move inner classes to top level.

* More refactoring and better use of dedicated classes instead of ad-hoc collections everywhere.

* Get rid of ExpressionCacheTest.java since it's no longer relevant in the multi-lib world.

* Handle queried library versions and cached libraries.

* Get rid of evaluation result printing code.

* Get rid of SearchableLibraryIdentifier and work towards more optimal structures for errors and exceptions.   Expose new method for downstream to handle the results.

* Optimize error handling structures.

* More cleanup:  Logging to prove expression caching is working as intended.

* Fix TODOs.

* Fix more TODOs and get rid of more cruft.

* Resolve more TODOs regarding immutability.

* More unit testing.  Address TODOs.

* Resolve some TODOs.  Add javadoc.

* Add counters for expression def evaluation.

* Resolve some TODOs, add some logging, and optimize the compile library workflow some more.

* Optimize library compile code to enhance reuse and not to pass around collections.

* Add more tests.  Refactor library resolution and compilation to be more consistent, introducing a CompiledLibraryMultiResults class.

* Implement all tests.  Get rid of tons of logs.  Use Collections.unmodifiableList() whenever possible.  Revert temp change with stubbed version.

* Cleanup more cruft.

* Increase test coverage.

* Increase test coverage more.

* Increase test coverage even more.  Get rid of more cruft.

* 80% coverage now???  Please?

* Second try for 80% in the same module.

* Fix sonar issues.

* More sonar.  Try to get back up to 80% coverage.

* More sonar.  Try to get back up to 80% coverage.

* Fix more sonar.

* Increase test coverage.

* Increase test coverage more.

* Updated the ELM schema from the 1.5.3 errata publication.

* Add support for Descendants to compiler/engine

* Remove accidental stack overflow

* Add some sonar fixes

* Updates for sonar

---------

Co-authored-by: JP <jonathan.i.percival@gmail.com>

* clear evaluated resources after expression eval

* spotless fix, comment

* Fix tests.

---------

Co-authored-by: Luke deGruchy <luke.degruchy@smiledigitalhealth.com>