Merge pull request #303 from MeasureAuthoringTool/feature/MAT-2572-uc…

…um-units

Feature/mat 2572 ucum units

mat-fhir-services/src/main/java/gov/cms/mat/fhir/services/rest/UCUMController.java

@@ -0,0 +1,31 @@
+package gov.cms.mat.fhir.services.rest;
+
+import gov.cms.mat.fhir.services.service.UCUMValidationService;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.net.URLDecoder;
+import java.nio.charset.StandardCharsets;
+
+@RestController
+@RequestMapping(path = "/ucum")
+@Tag(name = "UCUM-Controller",
+        description = "API for validating ucum codes")
+@Slf4j
+@RequiredArgsConstructor
+public class UCUMController {
+    private final UCUMValidationService ucumValidationService;
+
+    @Operation(summary = "Validate",
+            description = "Validate the ucum unit")
+    @GetMapping("/{unit}")
+    public Boolean validateCode(@PathVariable("unit") String unit) {
+        return ucumValidationService.validate(URLDecoder.decode(unit, StandardCharsets.UTF_8));
+    }
+}

mat-fhir-services/src/main/java/gov/cms/mat/fhir/services/service/UCUMValidationService.java

@@ -0,0 +1,36 @@
+package gov.cms.mat.fhir.services.service;
+
+import org.fhir.ucum.UcumEssenceService;
+import org.fhir.ucum.UcumException;
+import org.fhir.ucum.UcumService;
+import org.springframework.beans.InvalidPropertyException;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.core.io.Resource;
+import org.springframework.stereotype.Service;
+
+import javax.annotation.PostConstruct;
+import java.io.IOException;
+
+@Service
+public class UCUMValidationService {
+    @Value("classpath:ucum/ucum-essence.xml")
+    private Resource resource;
+
+    private UcumService ucumService;
+
+    @PostConstruct
+    void postConstruct() {
+        try {
+            ucumService = new UcumEssenceService(resource.getInputStream());
+        } catch (UcumException | IOException e) {
+            throw new InvalidPropertyException(this.getClass(), "resource", e.getMessage());
+        }
+    }
+
+    public Boolean validate(String unit) {
+        String result = ucumService.validate(unit);
+
+        //Returns:null if valid
+        return result == null;
+    }
+}