THRIFT-5571: add metadata map building to kotlin generator (#2584)

diff --git a/lib/kotlin/src/test/kotlin/org/apache/thrift/MetaDataTest.kt b/lib/kotlin/src/test/kotlin/org/apache/thrift/MetaDataTest.kt
new file mode 100644
index 0000000..e066bbe
--- /dev/null
+++ b/lib/kotlin/src/test/kotlin/org/apache/thrift/MetaDataTest.kt
@@ -0,0 +1,42 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.thrift
+
+import kotlin.test.assertEquals
+import org.apache.thrift.kotlin.annotation.test.Person
+import org.apache.thrift.meta_data.FieldMetaData
+import org.junit.jupiter.api.Test
+
+internal class MetaDataTest {
+    @Test
+    internal fun testAnnotation() {
+        val personMetadata = FieldMetaData.getStructMetaDataMap(Person::class.java)
+        assertEquals(3, personMetadata.size)
+        val idField = personMetadata[Person._Fields.ID]!!
+        assertEquals("id", idField.fieldName)
+        assertEquals(
+            mapOf(
+                "max" to "100000",
+                "min" to "1",
+            ),
+            idField.fieldAnnotations
+        )
+    }
+}
diff --git a/lib/kotlin/src/test/resources/AnnotationTest.thrift b/lib/kotlin/src/test/resources/AnnotationTest.thrift
new file mode 100644
index 0000000..0c4bca2
--- /dev/null
+++ b/lib/kotlin/src/test/resources/AnnotationTest.thrift
@@ -0,0 +1,7 @@
+namespace java org.apache.thrift.kotlin.annotation.test
+
+struct Person {
+  1: required i64 id (min="1", max="100000")
+  2: required string name
+  3: optional string phoneNumber
+}