Added correction to generated resource providers (#5743)

* Added correction to generated resource providers

* add changelog and fix issue that was adding languange SP to version that does not have language as a SP

* actually fix the test

* fix changelog wrong issue number

---------

Co-authored-by: Jens Kristian Villadsen <jenskristianvilladsen@gmail.com>
Co-authored-by: Long Ma <long@smilecdr.com>

hapi-fhir-docs/src/main/resources/ca/uhn/hapi/fhir/changelog/7_2_0/5742-new-language-searchparam-not-passed-to-generated-resource-provider.yaml

@@ -0,0 +1,4 @@
+---
+type: fix
+issue: 5742
+title: Fixed behaviour of the _language query parameter. Now it is picked up as search parameter in the resource provider and filters accordingly. Thanks to Jens Villadsen (@jkiddo) for the contribution!

hapi-tinder-plugin/src/main/resources/vm/jpa_resource_provider.vm

@@ -73,6 +73,12 @@ public class ${className}ResourceProvider extends
 			@OptionalParam(name=ca.uhn.fhir.rest.api.Constants.PARAM_LIST)
 			StringAndListParam theList,
 
+#if ( $version == 'R5' )
+			@Description(shortDefinition="The language of the resource")
+			@OptionalParam(name=ca.uhn.fhir.rest.api.Constants.PARAM_LANGUAGE)
+			TokenAndListParam theResourceLanguage,
+#end
+
 			@Description(shortDefinition="Search for resources which have the given source value (Resource.meta.source)")
 			@OptionalParam(name=ca.uhn.fhir.rest.api.Constants.PARAM_SOURCE)
 			UriAndListParam theSearchForSource,
@@ -154,6 +160,9 @@ public class ${className}ResourceProvider extends
 			paramMap.add(ca.uhn.fhir.rest.api.Constants.PARAM_PROFILE, theSearchForProfile);
 			paramMap.add(ca.uhn.fhir.rest.api.Constants.PARAM_SOURCE, theSearchForSource);
 			paramMap.add(ca.uhn.fhir.rest.api.Constants.PARAM_LIST, theList);
+#if ( $version == 'R5' )
+			paramMap.add(ca.uhn.fhir.rest.api.Constants.PARAM_LANGUAGE, theResourceLanguage);
+#end
 			paramMap.add("_has", theHas);
 #foreach ( $param in $searchParams ) 
 			paramMap.add("${param.name}", the${param.nameCapitalized});