Reproduction of issue with Vert-x3 MongoDB client

readme.md

These are the parts for a gradle project designed to mimic the gradle-verticle example. In order to see the issue you need to use the JS script to load data into the test db in mongo via mongo setup.js. Then when you build and run the fat jar you should see the following output:

Result is a LinkedHashMap
Object is a JsonObject
List is a JsonArray

The issue is the nested object and array, which aren't in a form that Groovy can handle natively.

build.gradle

plugins {
  id 'groovy'
  id 'com.github.johnrengelman.shadow' version '1.2.1'
}

version = '0.0.1-SNAPSHOT'

if (!JavaVersion.current().java8Compatible) {
    throw new IllegalStateException('''A Haiku:
                                      |  This needs Java 8,
                                      |  You are using something else,
                                      |  Refresh. Try again.'''.stripMargin())
}

repositories {
    jcenter()
    mavenCentral()
    maven {
        url = 'http://oss.sonatype.org/content/repositories/snapshots/'
    }
}

ext {
    vertxVersion = '3.0.0-SNAPSHOT'
}

dependencies {
    compile 'org.codehaus.groovy:groovy-all:2.4.3'
 
    compile "io.vertx:vertx-core:$vertxVersion"
    compile "io.vertx:vertx-lang-groovy:$vertxVersion"
    compile "io.vertx:vertx-mongo-client:$vertxVersion"
    
    testCompile 'junit:junit:4.12'
}

shadowJar {
    classifier = 'fat'
    manifest {
        attributes 'Main-Class': 'io.vertx.core.Starter'
        attributes 'Main-Verticle': 'groovy:bugs.SimpleMongoQuery'
    }
    mergeServiceFiles {
        include 'META-INF/services/io.vertx.core.spi.VerticleFactory'
    }
}

task wrapper(type: Wrapper) {
    gradleVersion = '2.3'
}

setup.js

use test
db.createCollection("MyCollection")
db.MyCollection.save({"obj": {"key": value"}, "list": ["v1", "v2"]})

SimpleMongoQuery.groovy

package bugs

import io.vertx.core.AsyncResult
import io.vertx.core.Future;
import io.vertx.groovy.ext.mongo.MongoClient
import io.vertx.lang.groovy.GroovyVerticle

/**
 * @author sfitts
 */
public class SimpleMongoQuery extends GroovyVerticle {

  private MongoClient mongo

  @Override
  public void start(Future<Void> startFuture) {

    // Create a Mongo Client
    def config = [db_name: 'test']
    mongo = MongoClient.createShared(vertx, config)
    doMongoQuery()
    startFuture.complete()
  }

  private void doMongoQuery() {
      mongo.findOne('MyCollection', [:], null, this.&handleMongoResults)
  }
  
  private void handleMongoResults(AsyncResult<Map<String, Object>> res) {
      if (res.succeeded()) {
          def x = res.result()
          if (x) println("Result is a ${x.getClass().simpleName}")
          if (x.obj) println("Object is a ${x.obj.getClass().simpleName}")
          if (x.list) println("List is a ${x.list.getClass().simpleName}")
      }
  }
}

there is an missing quote in setup.js for { "key": "value" }