feat: add code generation for oBDS v3 (#101)

* feat: codegen for oBDS 3.0.2

* test: add some basic content assertions

* refactor: change package of generated code

.gitignore

@@ -64,3 +64,6 @@ package-lock.json
 tests/k8s/**/charts
 
 node_modules/
+
+# generated code
+src/generated/

build.gradle

@@ -16,6 +16,7 @@ configurations {
 	compileOnly {
 		extendsFrom annotationProcessor
 	}
+	xsd2java
 }
 
 repositories {
@@ -25,6 +26,15 @@ repositories {
 ext {
 	set('springCloudVersion', "2023.0.3")
 	set('hapiVersion', "7.4.0")
+	jaxbTargetDir = file("src/generated/java")
+}
+
+sourceSets {
+	main {
+		java {
+			srcDirs jaxbTargetDir
+		}
+	}
 }
 
 dependencies {
@@ -44,7 +54,11 @@ dependencies {
 	// Jackson v3 supports Optional out-of-the-box but isn't yet provided by Spring Boot by default
 	// <https://github.com/FasterXML/jackson-modules-java8>
 	implementation 'com.fasterxml.jackson.datatype:jackson-datatype-jdk8'
+	implementation 'com.fasterxml.jackson.module:jackson-module-jakarta-xmlbind-annotations'
 
+	// JAXB code generation
+	xsd2java "com.sun.xml.bind:jaxb-xjc:4.0.5"
+	xsd2java "com.sun.xml.bind:jaxb-impl:4.0.5"
 
 	annotationProcessor "org.springframework.boot:spring-boot-configuration-processor"
 
@@ -88,3 +102,22 @@ jacocoTestReport {
 jar {
 	enabled = false
 }
+
+tasks.register('xsd2java') {
+
+	doLast {
+		jaxbTargetDir.mkdirs()
+
+		ant.taskdef(name: 'xjc', classname: 'com.sun.tools.xjc.XJCTask', classpath: configurations.xsd2java.asPath)
+		ant.jaxbTargetDir = jaxbTargetDir
+
+
+		ant.xjc(
+				destdir: '${jaxbTargetDir}',
+				package: 'de.basisdatensatz.obds.v3',
+				schema: 'src/main/resources/schema/oBDS_v3.0.2.xsd'
+		)
+
+	}
+}
+compileJava.dependsOn xsd2java