Allow slotting in own IMessageResolver

This is useful in case we want to define our own way of translating
the codes in the thymeleaf templates.

hapi-fhir-base/src/main/java/ca/uhn/fhir/narrative/BaseThymeleafNarrativeGenerator.java

@@ -34,6 +34,7 @@ import org.thymeleaf.cache.ICacheEntryValidity;
 import org.thymeleaf.context.Context;
 import org.thymeleaf.context.ITemplateContext;
 import org.thymeleaf.engine.AttributeName;
+import org.thymeleaf.messageresolver.IMessageResolver;
 import org.thymeleaf.model.IProcessableElementTag;
 import org.thymeleaf.processor.IProcessor;
 import org.thymeleaf.processor.element.AbstractAttributeTagProcessor;
@@ -65,6 +66,8 @@ public abstract class BaseThymeleafNarrativeGenerator implements INarrativeGener
 	private HashMap<String, String> myNameToNarrativeTemplate;
 	private TemplateEngine myProfileTemplateEngine;
 
+	private IMessageResolver resolver;
+
 	/**
 	 * Constructor
 	 */
@@ -166,11 +169,21 @@ public abstract class BaseThymeleafNarrativeGenerator implements INarrativeGener
 
 			};
 			myProfileTemplateEngine.setDialect(dialect);
+			if (this.resolver != null) {
+				myProfileTemplateEngine.setMessageResolver(this.resolver);
+			}
 		}
 
 		myInitialized = true;
 	}
 
+	public void setMessageResolver(IMessageResolver resolver) {
+		this.resolver = resolver;
+		if (myProfileTemplateEngine != null && resolver != null) {
+			myProfileTemplateEngine.setMessageResolver(resolver);
+		}
+	}
+
 	/**
 	 * If set to <code>true</code> (which is the default), most whitespace will be trimmed from the generated narrative
 	 * before it is returned.

hapi-fhir-structures-dstu3/src/test/java/ca/uhn/fhir/narrative/DefaultThymeleafNarrativeGeneratorDstu3Test.java

@@ -5,7 +5,12 @@ import static org.junit.Assert.assertThat;
 import static org.junit.Assert.assertTrue;
 
 import java.util.Date;
+import java.util.HashMap;
+import java.util.Locale;
+import java.util.Map;
 
+import org.apache.commons.collections.Transformer;
+import org.apache.commons.collections.map.LazyMap;
 import org.hamcrest.core.StringContains;
 import org.hl7.fhir.dstu3.model.CodeableConcept;
 import org.hl7.fhir.dstu3.model.Coding;
@@ -28,6 +33,8 @@ import org.junit.AfterClass;
 import org.junit.Before;
 import org.junit.Ignore;
 import org.junit.Test;
+import org.thymeleaf.messageresolver.StandardMessageResolver;
+import org.thymeleaf.templateresource.ITemplateResource;
 
 import ca.uhn.fhir.context.FhirContext;
 import ca.uhn.fhir.parser.DataFormatException;
@@ -77,6 +84,52 @@ public class DefaultThymeleafNarrativeGeneratorDstu3Test {
 
 	}
 
+	@Test
+	public void testTranslations() throws DataFormatException {
+		CustomThymeleafNarrativeGenerator customGen = new CustomThymeleafNarrativeGenerator("classpath:/testnarrative.properties");
+		customGen.setIgnoreFailures(false);
+		customGen.setIgnoreMissingTemplates(false);
+
+		FhirContext ctx = FhirContext.forDstu3();
+		ctx.setNarrativeGenerator(customGen);
+
+		Patient value = new Patient();
+
+		value.addIdentifier().setSystem("urn:names").setValue("123456");
+		value.addName().setFamily("blow").addGiven("joe").addGiven((String) null).addGiven("john");
+		//@formatter:off
+		value.addAddress()
+			.addLine("123 Fake Street").addLine("Unit 1")
+			.setCity("Toronto").setState("ON").setCountry("Canada");
+		//@formatter:on
+
+		value.setBirthDate(new Date());
+
+		Transformer transformer = new Transformer() {
+
+			@Override
+			public Object transform(Object input) {
+				return "UNTRANSLATED:" + input;
+			}};
+
+		Map translations = new HashMap<>();
+		translations.put("some_text", "Some beautiful proze");
+
+		customGen.setMessageResolver(new StandardMessageResolver() {
+			@Override
+			protected Map<String, String> resolveMessagesForTemplate(String template,
+			                                                         ITemplateResource templateResource, Locale locale) {
+				return LazyMap.decorate(translations, transformer);
+			}
+		});
+
+		Narrative narrative = new Narrative();
+		customGen.generateNarrative(ctx, value, narrative);
+		String output = narrative.getDiv().getValueAsString();
+		ourLog.info(output);
+		assertThat(output, StringContains.containsString("Some beautiful proze"));
+		assertThat(output, StringContains.containsString("UNTRANSLATED:other_text"));
+	}
 
 	@Test
 	public void testGenerateDiagnosticReport() throws DataFormatException {

hapi-fhir-structures-dstu3/src/test/resources/TestPatient.html

@@ -0,0 +1,4 @@
+<div>
+  <p th:text="#{some_text}">Some Text</p>
+  <p th:text="#{other_text}">Some Text</p>
+</div>

hapi-fhir-structures-dstu3/src/test/resources/testnarrative.properties

@@ -0,0 +1,2 @@
+patient.class=org.hl7.fhir.dstu3.model.Patient
+patient.narrative=classpath:/TestPatient.html