From c1b9e4f948ef2e157f7c85c157686a726e0b9367 Mon Sep 17 00:00:00 2001
From: Stefan Kapferer <stefan@kapferer.ch>
Date: Mon, 19 Oct 2026 22:49:30 +0200
Subject: [PATCH] Add basePackage to BoundedContext (#375)

Declares where a Bounded Context lives in the code, e.g.

  basePackage = com.transit.ticketsales

Same syntax as on Modules (dot-separated identifiers), the equal sign is
optional like for the other Bounded Context attributes.
---
 .../dsl/BoundedContextDSLParsingTest.xtend    | 50 +++++++++++++++++++
 .../contextmapper/dsl/ContextMappingDSL.xtext |  1 +
 .../ContextMappingDSLFormatter.xtend          |  1 +
 3 files changed, 52 insertions(+)

diff --git a/org.contextmapper.dsl.tests/src/org/contextmapper/dsl/BoundedContextDSLParsingTest.xtend b/org.contextmapper.dsl.tests/src/org/contextmapper/dsl/BoundedContextDSLParsingTest.xtend
index 0c00b5e0..afdb3fa5 100644
--- a/org.contextmapper.dsl.tests/src/org/contextmapper/dsl/BoundedContextDSLParsingTest.xtend
+++ b/org.contextmapper.dsl.tests/src/org/contextmapper/dsl/BoundedContextDSLParsingTest.xtend
@@ -295,6 +295,56 @@ class BoundedContextDSLParsingTest {
 		assertEquals("Gate validation", result.boundedContexts.get(0).nonResponsibilities.get(0));
 	}
 
+	@Test
+	def void canDefineBasePackage() {
+		// given
+		val String dslSnippet = '''
+			BoundedContext TicketSales {
+				basePackage = com.transit.ticketsales
+			}
+		''';
+		// when
+		val ContextMappingModel result = parseHelper.parse(dslSnippet);
+		// then
+		assertThatNoParsingErrorsOccurred(result);
+		assertThatNoValidationErrorsOccurred(result);
+		assertEquals("com.transit.ticketsales", result.boundedContexts.get(0).basePackage);
+	}
+
+	@Test
+	def void canDefineBasePackageWithoutEqualSign() {
+		// given
+		val String dslSnippet = '''
+			BoundedContext TicketSales {
+				basePackage com.transit.ticketsales
+				Module refunds {
+					basePackage = com.transit.ticketsales.refunds
+				}
+			}
+		''';
+		// when
+		val ContextMappingModel result = parseHelper.parse(dslSnippet);
+		// then
+		assertThatNoParsingErrorsOccurred(result);
+		assertThatNoValidationErrorsOccurred(result);
+		assertEquals("com.transit.ticketsales", result.boundedContexts.get(0).basePackage);
+		assertEquals("com.transit.ticketsales.refunds", result.boundedContexts.get(0).modules.get(0).basePackage);
+	}
+
+	@Test
+	def void cannotDefineInvalidBasePackage() {
+		// given
+		val String dslSnippet = '''
+			BoundedContext TicketSales {
+				basePackage = com..transit
+			}
+		''';
+		// when
+		val ContextMappingModel result = parseHelper.parse(dslSnippet);
+		// then
+		assertFalse(result.eResource.errors.isEmpty);
+	}
+
 	@Test
 	def void canDefineAttributesWithoutEqualSign() {
 		// given
diff --git a/org.contextmapper.dsl/src/org/contextmapper/dsl/ContextMappingDSL.xtext b/org.contextmapper.dsl/src/org/contextmapper/dsl/ContextMappingDSL.xtext
index e3e2b8c4..15b68f93 100644
--- a/org.contextmapper.dsl/src/org/contextmapper/dsl/ContextMappingDSL.xtext
+++ b/org.contextmapper.dsl/src/org/contextmapper/dsl/ContextMappingDSL.xtext
@@ -60,6 +60,7 @@ BoundedContext:
 			(('responsibilities' ('=')? responsibilities+=STRING) ("," responsibilities+=STRING)*)? &
 			(('nonResponsibilities' ('=')? nonResponsibilities+=STRING) ("," nonResponsibilities+=STRING)*)? &
 			('implementationTechnology' ('=')? implementationTechnology=STRING)? &
+			('basePackage' ('=')? basePackage=JavaIdentifier)? &
 			('knowledgeLevel' ('=')? knowledgeLevel=KnowledgeLevel)?)
 			('businessModel' ('=')? businessModel=STRING)? &
             ('evolution' ('=')? evolution=Evolution)? &
diff --git a/org.contextmapper.dsl/src/org/contextmapper/dsl/formatting2/ContextMappingDSLFormatter.xtend b/org.contextmapper.dsl/src/org/contextmapper/dsl/formatting2/ContextMappingDSLFormatter.xtend
index 1ce258c7..7dc32092 100644
--- a/org.contextmapper.dsl/src/org/contextmapper/dsl/formatting2/ContextMappingDSLFormatter.xtend
+++ b/org.contextmapper.dsl/src/org/contextmapper/dsl/formatting2/ContextMappingDSLFormatter.xtend
@@ -122,6 +122,7 @@ class ContextMappingDSLFormatter extends TacticDDDLanguageFormatter {
 		boundedContext.regionFor.keyword("responsibilities").prepend[newLine]
 		boundedContext.regionFor.keyword("nonResponsibilities").prepend[newLine]
 		boundedContext.regionFor.keyword("implementationTechnology").prepend[newLine]
+		boundedContext.regionFor.keyword("basePackage").prepend[newLine]
 		boundedContext.regionFor.keyword("knowledgeLevel").prepend[newLine]
 
 		for (aggregate : boundedContext.aggregates) {