allow enum values to have arbitrary casing in YAML

annot/src/main/java/com/predic8/membrane/annot/generator/kubernetes/model/SchemaObject.java

@@ -14,6 +14,7 @@
 package com.predic8.membrane.annot.generator.kubernetes.model;
 
 import com.fasterxml.jackson.databind.node.*;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.*;
 
@@ -148,11 +149,22 @@ private void addProperties(ObjectNode node) {
     private static ObjectNode createPropertyNode(AbstractSchema<?> property) {
         ObjectNode propertyNode = property.json(jnf.objectNode());
         if (property.getEnumValues() != null && !property.getEnumValues().isEmpty()) {
-            propertyNode.set("enum", getEnumNode(property));
+            propertyNode = createEnumNode(property, propertyNode);
         }
         return propertyNode;
     }
 
+    private static @NotNull ObjectNode createEnumNode(AbstractSchema<?> property, ObjectNode propertyNode) {
+        ObjectNode unlimitedNode = propertyNode.deepCopy(); // a string (unrestricted)
+        ObjectNode limitedNode = propertyNode; // a string restricted by 'enum'
+        limitedNode.set("enum", getEnumNode(property));
+        propertyNode = jnf.objectNode();
+        // The 'anyOf' construction will suggest the pre-defined enum values (lowercase enum values) but allow other
+        // spellings.
+        propertyNode.set("anyOf", jnf.arrayNode().add(limitedNode).add(unlimitedNode));
+        return propertyNode;
+    }
+
     private static ArrayNode getEnumNode(AbstractSchema<?> property) {
         var enumValues = jnf.arrayNode();
         property.getEnumValues().forEach(enumValues::add);

annot/src/test/java/com/predic8/membrane/annot/SpringEnumParsingTest.java

@@ -0,0 +1,53 @@
+package com.predic8.membrane.annot;
+
+import com.predic8.membrane.annot.beanregistry.BeanRegistry;
+import com.predic8.membrane.annot.util.CompilerHelper;
+import com.predic8.membrane.annot.util.CompilerResult;
+import org.junit.jupiter.api.Test;
+
+import static com.predic8.membrane.annot.SpringConfigurationXSDGeneratingAnnotationProcessorTest.MC_MAIN_DEMO;
+import static com.predic8.membrane.annot.util.CompilerHelper.*;
+import static com.predic8.membrane.annot.util.StructureAssertionUtil.*;
+
+public class SpringEnumParsingTest {
+
+    private static final String TRIVIAL_ENUM_EXAMPLE = """
+        package com.predic8.membrane.demo;
+        import com.predic8.membrane.annot.*;
+        import java.util.List;
+        @MCElement(name="root")
+        public class DemoElement {
+            MyEnum value;
+
+            public MyEnum getValue() { return value; }
+            @MCAttribute
+            public void setValue(MyEnum value) { this.value = value; }
+        }
+        ---
+        package com.predic8.membrane.demo;
+        public enum MyEnum {
+            VALUE1, VALUE2;
+        }
+        """;
+
+    @Test
+    public void checkEnumParsing() {
+        var sources = splitSources(MC_MAIN_DEMO + TRIVIAL_ENUM_EXAMPLE);
+        var result = CompilerHelper.compile(sources, false);
+        assertCompilerResult(true, result);
+
+        assertThatXMLValueWasTranslatedTo(result, "VALUE1", "VALUE1");
+        assertThatXMLValueWasTranslatedTo(result, "value1", "VALUE1");
+    }
+
+    private static void assertThatXMLValueWasTranslatedTo(CompilerResult result, String xmlValue, String expectedToStringValue) {
+        BeanRegistry br = parseXML(result, SpringParsingTest.wrapSpring("""
+                <root value="%s" />""".formatted(xmlValue)));
+
+        assertStructure(
+                br,
+                clazz("DemoElement",
+                        property("value", convertedToString(expectedToStringValue))));
+    }
+
+}

annot/src/test/java/com/predic8/membrane/annot/ParsingTest.java → annot/src/test/java/com/predic8/membrane/annot/SpringParsingTest.java

@@ -17,7 +17,6 @@
 import com.predic8.membrane.annot.beanregistry.BeanRegistry;
 import com.predic8.membrane.annot.beanregistry.SpringContextAdapter;
 import com.predic8.membrane.annot.util.CompilerHelper;
-import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 import org.springframework.context.ConfigurableApplicationContext;
 
@@ -28,9 +27,9 @@
 import static com.predic8.membrane.annot.util.StructureAssertionUtil.*;
 import static com.predic8.membrane.annot.util.StructureAssertionUtil.clazz;
 
-public class ParsingTest {
+public class SpringParsingTest {
 
-    private String wrapSpring(String content) {
+    public static String wrapSpring(String content) {
         return """
                 <spring:beans xmlns="http://membrane-soa.org/demo/1/"
                               xmlns:spring="http://www.springframework.org/schema/beans"

annot/src/test/java/com/predic8/membrane/annot/YAMLEnumParsingTest.java

@@ -0,0 +1,55 @@
+package com.predic8.membrane.annot;
+
+import com.predic8.membrane.annot.beanregistry.BeanRegistry;
+import com.predic8.membrane.annot.util.CompilerHelper;
+import com.predic8.membrane.annot.util.CompilerResult;
+import org.junit.jupiter.api.Test;
+
+import static com.predic8.membrane.annot.SpringConfigurationXSDGeneratingAnnotationProcessorTest.MC_MAIN_DEMO;
+import static com.predic8.membrane.annot.util.CompilerHelper.*;
+import static com.predic8.membrane.annot.util.StructureAssertionUtil.*;
+import static com.predic8.membrane.annot.util.StructureAssertionUtil.convertedToString;
+
+public class YAMLEnumParsingTest {
+
+    private static final String TRIVIAL_ENUM_EXAMPLE = """
+        package com.predic8.membrane.demo;
+        import com.predic8.membrane.annot.*;
+        import java.util.List;
+        @MCElement(name="root", topLevel=true, component=false)
+        public class DemoElement {
+            MyEnum value;
+
+            public MyEnum getValue() { return value; }
+            @MCAttribute
+            public void setValue(MyEnum value) { this.value = value; }
+        }
+        ---
+        package com.predic8.membrane.demo;
+        public enum MyEnum {
+            VALUE1, VALUE2;
+        }
+        """;
+
+    @Test
+    public void checkEnumParsing() {
+        var sources = splitSources(MC_MAIN_DEMO + TRIVIAL_ENUM_EXAMPLE);
+        var result = CompilerHelper.compile(sources, false);
+        assertCompilerResult(true, result);
+
+        assertThatXMLValueWasTranslatedTo(result, "value1", "VALUE1");
+        assertThatXMLValueWasTranslatedTo(result, "VALUE1", "VALUE1");
+    }
+
+    private static void assertThatXMLValueWasTranslatedTo(CompilerResult result, String xmlValue, String expectedToStringValue) {
+        BeanRegistry br = parseYAML(result, """
+                root:
+                  value: %s""".formatted(xmlValue));
+
+        assertStructure(
+                br,
+                clazz("DemoElement",
+                        property("value", convertedToString(expectedToStringValue))));
+    }
+
+}

annot/src/test/java/com/predic8/membrane/annot/util/CompilerHelper.java

@@ -45,7 +45,7 @@ public class CompilerHelper {
     public static final String ANNOTATION_PROCESSOR_CLASSNAME = "com.predic8.membrane.annot.SpringConfigurationXSDGeneratingAnnotationProcessor";
     public static final String APPLICATION_CONTEXT_CLASSNAME = "org.springframework.context.support.ClassPathXmlApplicationContext";
     private static final Pattern PACKAGE_PATTERN = Pattern.compile("package\\s+([^;]+)\\s*;");
-    private static final Pattern CLASS_PATTERN = Pattern.compile("class\\s+([^\\s]+)\\s");
+    private static final Pattern CLASS_PATTERN = Pattern.compile("(class|enum|interface)\\s+([^\\s]+)\\s");
 
     /**
      * Compile the given source files.
@@ -199,7 +199,7 @@ private static String extractName(String source) {
         Matcher m = CLASS_PATTERN.matcher(source);
         if (!m.find())
             throw new RuntimeException("No class name found in source:\n" + source);
-        return m.group(1);
+        return m.group(2);
     }
 
     private static String extractPackage(String source) {

annot/src/test/java/com/predic8/membrane/annot/util/StructureAssertionUtil.java

@@ -83,6 +83,14 @@ public static Asserter value(Object value) {
         return bean -> Assertions.assertEquals(value, bean);
     }
 
+    public static Asserter isNull() {
+        return bean -> Assertions.assertNull(bean);
+    }
+
+    public static Asserter convertedToString(String value) {
+        return bean -> Assertions.assertEquals(value, bean.toString());
+    }
+
     public static Asserter list(Asserter... asserters) {
         return bean -> {
             assertInstanceOf(List.class, bean);