Getting the ArrayOfObjects value in MongoDb with java driver - mongodb

Question

I need to compare the requestParam system and Email Systems system ,if both are equal ,result value should be feteched based that system
{
"_id" : ObjectId("5f0890e870e631865877e"),
"user" : "testuser",
"Email" : "testuser#sample.com",
"Batch Systems" : [
"STAR",
"STORY",
"ITEMS",
],
"Email Systems" : [
{
"Bob" : {
"System" : "Bob",
**"result"** : true
}
},
{
"Wild" : {
"System" : "Wild",
"result" : true
}
},
{
"CRaft" : {
"System" : "Craft",
"result" : false
}
}
]
}
public Object getDetails(#RequestParam(value = "system") String userId,
MongoDatabase database = this.mongoClient.getDatabase(this.database);
MongoCollection<Document> users = database.getCollection(users);
String searchString = new String(sourceSystem);
Document matchDoc = new Document("$Email Systems.Bob.System",searchString);
Document projectDoc = new Document("$Email Systems","EmailSystem");
AggregateIterable<Document> aggregateIterable = users.aggregate(Arrays.asList( new Document("$match", matchDoc)));
Iterator iterator = aggregateIterable.iterator();
ArrayList<Document> documents = new ArrayList();
while (iterator.hasNext()) {
boolean doc = documents.add((Document) iterator.next());
About Code is giving results [Document{{Bob=Document{{System=Bob, result=true}}}}, Document{{Wild=Document{{System=Wild, result=true}}}}]
I am not able to get the Bob result value and it should be compared with the request param system .Can anyone help me the way to get the Bob result value based on above output