From 4a33a01b78d21b2519a9d39f2390153302e00bda Mon Sep 17 00:00:00 2001
From: Melih Aydogdu <melih.aydogdu@formelio.nl>
Date: Thu, 27 Jun 2024 13:58:36 +0200
Subject: [PATCH] string param support added

---
 .../matcher/InMemoryResourceMatcher.java      | 36 +++++++++++--------
 1 file changed, 22 insertions(+), 14 deletions(-)

diff --git a/hapi-fhir-jpaserver-searchparam/src/main/java/ca/uhn/fhir/jpa/searchparam/matcher/InMemoryResourceMatcher.java b/hapi-fhir-jpaserver-searchparam/src/main/java/ca/uhn/fhir/jpa/searchparam/matcher/InMemoryResourceMatcher.java
index 3b580a4e5f4e..60a951534e1e 100644
--- a/hapi-fhir-jpaserver-searchparam/src/main/java/ca/uhn/fhir/jpa/searchparam/matcher/InMemoryResourceMatcher.java
+++ b/hapi-fhir-jpaserver-searchparam/src/main/java/ca/uhn/fhir/jpa/searchparam/matcher/InMemoryResourceMatcher.java
@@ -663,20 +663,9 @@ private boolean matchChainedReferenceParam(
 
 					// Create new search parameter map to match the next resource
 					SearchParameterMap searchParameterMap = new SearchParameterMap();
-					if (resourceSearchParam.getParamType().equals(RestSearchParameterTypeEnum.REFERENCE)) {
-						searchParameterMap.add(
-								parameterName, new ReferenceParam(modifier, chain, referenceParam.getValue()));
-					} else {
-						TokenParam tokenParam;
-						if (referenceParam.getValue().contains("|")) {
-							String[] systemAndValue = referenceParam.getValue().split("\\|");
-							tokenParam = new TokenParam(systemAndValue[0], systemAndValue[1]);
-						} else {
-							tokenParam = new TokenParam(referenceParam.getValue());
-						}
-						tokenParam.setModifier(TokenParamModifier.forValue(":" + modifier));
-						searchParameterMap.add(parameterName, tokenParam);
-					}
+					IQueryParameterType theParam =
+							convertReferenceParam(referenceParam, resourceSearchParam, modifier, chain);
+					searchParameterMap.add(parameterName, theParam);
 
 					// Recursively match the chained resources
 					return searchParamMatcher
@@ -685,6 +674,25 @@ private boolean matchChainedReferenceParam(
 				});
 	}
 
+	private static IQueryParameterType convertReferenceParam(
+			ReferenceParam referenceParam, RuntimeSearchParam resourceSearchParam, String modifier, String chain) {
+		if (resourceSearchParam.getParamType().equals(RestSearchParameterTypeEnum.REFERENCE)) {
+			return new ReferenceParam(modifier, chain, referenceParam.getValue());
+		} else if (resourceSearchParam.getParamType().equals(RestSearchParameterTypeEnum.STRING)) {
+			return new StringParam(referenceParam.getValue(), "exact".equals(modifier));
+		} else {
+			TokenParam tokenParam;
+			if (referenceParam.getValue().contains("|")) {
+				String[] systemAndValue = referenceParam.getValue().split("\\|");
+				tokenParam = new TokenParam(systemAndValue[0], systemAndValue[1]);
+			} else {
+				tokenParam = new TokenParam(referenceParam.getValue());
+			}
+			tokenParam.setModifier(TokenParamModifier.forValue(":" + modifier));
+			return tokenParam;
+		}
+	}
+
 	private boolean systemContainsCode(TokenParam theQueryParam, ResourceIndexedSearchParamToken theSearchParamToken) {
 		IValidationSupport validationSupport = getValidationSupportOrNull();
 		if (validationSupport == null) {