Kotlin support

Author: henrik242

pom.xml

@@ -23,6 +23,7 @@
     <javac.target.version>1.8</javac.target.version>
     <scala.version>2.13</scala.version>
     <scala.full.version>2.13.3</scala.full.version>
+    <kotlin.version>1.4.21</kotlin.version>
 
     <!-- 13-Oct-2020, tatu: may need to occasionally work around missing Scala
             module snapshot version
@@ -60,6 +61,15 @@
       <artifactId>scala-library</artifactId>
       <version>${scala.full.version}</version>
     </dependency>
+    <dependency>
+      <groupId>com.fasterxml.jackson.module</groupId>
+      <artifactId>jackson-module-kotlin</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.jetbrains.kotlin</groupId>
+      <artifactId>kotlin-stdlib-jdk8</artifactId>
+      <version>${kotlin.version}</version>
+    </dependency>
 
     <!-- first, try to ensure dataformats work -->
     <dependency>
@@ -211,14 +221,36 @@
           </execution>
         </executions>
       </plugin>
+      <plugin>
+        <groupId>org.jetbrains.kotlin</groupId>
+        <artifactId>kotlin-maven-plugin</artifactId>
+        <version>${kotlin.version}</version>
+        <executions>
+          <execution>
+            <id>test-compile</id>
+            <goals> <goal>test-compile</goal> </goals>
+            <configuration>
+              <sourceDirs>
+                <sourceDir>${project.basedir}/src/test/kotlin</sourceDir>
+                <sourceDir>${project.basedir}/src/test/java</sourceDir>
+              </sourceDirs>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-compiler-plugin</artifactId>
         <executions>
           <execution>
-            <phase>compile</phase>
+            <id>default-testCompile</id>
+            <phase>none</phase>
+          </execution>
+          <execution>
+            <id>java-test-compile</id>
+            <phase>test-compile</phase>
             <goals>
-              <goal>compile</goal>
+              <goal>testCompile</goal>
             </goals>
           </execution>
         </executions>