feat(schema): Add TypeName enum

Author: thced

src/main/java/com/retailsvc/http/spec/schema/TypeName.java

@@ -0,0 +1,24 @@
+package com.retailsvc.http.spec.schema;
+
+public enum TypeName {
+  STRING,
+  NUMBER,
+  INTEGER,
+  BOOLEAN,
+  OBJECT,
+  ARRAY,
+  NULL;
+
+  public static TypeName fromJsonSchema(String name) {
+    return switch (name) {
+      case "string" -> STRING;
+      case "number" -> NUMBER;
+      case "integer" -> INTEGER;
+      case "boolean" -> BOOLEAN;
+      case "object" -> OBJECT;
+      case "array" -> ARRAY;
+      case "null" -> NULL;
+      default -> throw new IllegalArgumentException("unknown JSON Schema type: " + name);
+    };
+  }
+}

src/test/java/com/retailsvc/http/spec/schema/TypeNameTest.java

@@ -0,0 +1,24 @@
+package com.retailsvc.http.spec.schema;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import org.junit.jupiter.api.Test;
+
+class TypeNameTest {
+  @Test
+  void parsesAllSevenJsonSchemaTypes() {
+    assertThat(TypeName.fromJsonSchema("string")).isEqualTo(TypeName.STRING);
+    assertThat(TypeName.fromJsonSchema("number")).isEqualTo(TypeName.NUMBER);
+    assertThat(TypeName.fromJsonSchema("integer")).isEqualTo(TypeName.INTEGER);
+    assertThat(TypeName.fromJsonSchema("boolean")).isEqualTo(TypeName.BOOLEAN);
+    assertThat(TypeName.fromJsonSchema("object")).isEqualTo(TypeName.OBJECT);
+    assertThat(TypeName.fromJsonSchema("array")).isEqualTo(TypeName.ARRAY);
+    assertThat(TypeName.fromJsonSchema("null")).isEqualTo(TypeName.NULL);
+  }
+
+  @Test
+  void unknownTypeNameThrows() {
+    assertThrows(IllegalArgumentException.class, () -> TypeName.fromJsonSchema("widget"));
+  }
+}