Program: 89001
Project: 89001
Buggy source:
/** 
 * @param account - Account (usually: current user or a contact)
 * @param groupList - a list containing all groups we want to search in (usually all groups from account)
 * @param accountList - a list containing all accounts we want to search in (usually contact from account)
 * @return List of Posts
 */
public static Query streamForAccount(String selectClause,Account account,List<Group> groupList,List<Account> accountList,String filter,String orderByClause){
  HashMap<String,String> streamClausesMap=new HashMap<>();
  List<String> streamClausesList=new ArrayList<>();
  String accountPosts="String_Node_Str";
  streamClausesMap.put("String_Node_Str",accountPosts);
  String accountGroupPosts="String_Node_Str";
  streamClausesMap.put("String_Node_Str",accountGroupPosts);
  String allGroupPosts="String_Node_Str";
  streamClausesMap.put("String_Node_Str",allGroupPosts);
  String accountContactPosts="String_Node_Str";
  streamClausesMap.put("String_Node_Str",accountContactPosts);
  String contactToAccountPosts="String_Node_Str";
  streamClausesMap.put("String_Node_Str",contactToAccountPosts);
  String contactPosts="String_Node_Str";
  streamClausesMap.put("String_Node_Str",contactPosts);
switch (filter) {
case "String_Node_Str":
    streamClausesList.add(streamClausesMap.get("String_Node_Str"));
  break;
case "String_Node_Str":
streamClausesList.add(streamClausesMap.get("String_Node_Str"));
streamClausesList.add(streamClausesMap.get("String_Node_Str"));
break;
case "String_Node_Str":
streamClausesList.add(streamClausesMap.get("String_Node_Str"));
streamClausesList.add(streamClausesMap.get("String_Node_Str"));
break;
case "String_Node_Str":
streamClausesList.add(streamClausesMap.get("String_Node_Str"));
streamClausesList.add(streamClausesMap.get("String_Node_Str"));
streamClausesList.add(streamClausesMap.get("String_Node_Str"));
break;
default :
streamClausesList.add(streamClausesMap.get("String_Node_Str"));
streamClausesList.add(streamClausesMap.get("String_Node_Str"));
streamClausesList.add(streamClausesMap.get("String_Node_Str"));
streamClausesList.add(streamClausesMap.get("String_Node_Str"));
streamClausesList.add(streamClausesMap.get("String_Node_Str"));
streamClausesList.add(streamClausesMap.get("String_Node_Str"));
break;
}
streamClausesList.removeAll(Collections.singleton(null));
String completeQuery=selectClause + "String_Node_Str" + assembleClauses(streamClausesList)+ orderByClause;
Query query=JPA.em().createQuery(completeQuery);
if (completeQuery.contains("String_Node_Str")) query.setParameter("String_Node_Str",account);
if (completeQuery.contains("String_Node_Str")) query.setParameter("String_Node_Str",groupList);
if (completeQuery.contains("String_Node_Str")) query.setParameter("String_Node_Str",accountList);
return query;
}

Fixed version (ground truth):
/** 
 * @param account - Account (usually: current user or a contact)
 * @param groupList - a list containing all groups we want to search in (usually all groups from account)
 * @param accountList - a list containing all accounts we want to search in (usually contact from account)
 * @return List of Posts
 */
public static Query streamForAccount(String selectClause,Account account,List<Group> groupList,List<Account> accountList,String filter,String orderByClause){
  HashMap<String,String> streamClausesMap=new HashMap<>();
  List<String> streamClausesList=new ArrayList<>();
  String accountPosts="String_Node_Str";
  streamClausesMap.put("String_Node_Str",accountPosts);
  String accountGroupPosts="String_Node_Str";
  streamClausesMap.put("String_Node_Str",accountGroupPosts);
  String allGroupPosts="String_Node_Str";
  streamClausesMap.put("String_Node_Str",allGroupPosts);
  String accountContactPosts="String_Node_Str";
  streamClausesMap.put("String_Node_Str",accountContactPosts);
  String contactToAccountPosts="String_Node_Str";
  streamClausesMap.put("String_Node_Str",contactToAccountPosts);
  String contactPosts="String_Node_Str";
  streamClausesMap.put("String_Node_Str",contactPosts);
switch (filter) {
case "String_Node_Str":
    streamClausesList.add(streamClausesMap.get("String_Node_Str"));
  break;
case "String_Node_Str":
streamClausesList.add(streamClausesMap.get("String_Node_Str"));
streamClausesList.add(streamClausesMap.get("String_Node_Str"));
break;
case "String_Node_Str":
streamClausesList.add(streamClausesMap.get("String_Node_Str"));
streamClausesList.add(streamClausesMap.get("String_Node_Str"));
break;
case "String_Node_Str":
streamClausesList.add(streamClausesMap.get("String_Node_Str"));
streamClausesList.add(streamClausesMap.get("String_Node_Str"));
streamClausesList.add(streamClausesMap.get("String_Node_Str"));
break;
case "String_Node_Str":
streamClausesList.add(streamClausesMap.get("String_Node_Str"));
break;
default :
streamClausesList.add(streamClausesMap.get("String_Node_Str"));
streamClausesList.add(streamClausesMap.get("String_Node_Str"));
streamClausesList.add(streamClausesMap.get("String_Node_Str"));
streamClausesList.add(streamClausesMap.get("String_Node_Str"));
streamClausesList.add(streamClausesMap.get("String_Node_Str"));
streamClausesList.add(streamClausesMap.get("String_Node_Str"));
break;
}
streamClausesList.removeAll(Collections.singleton(null));
String completeQuery=selectClause + "String_Node_Str" + assembleClauses(streamClausesList)+ orderByClause;
Query query=JPA.em().createQuery(completeQuery);
if (completeQuery.contains("String_Node_Str")) query.setParameter("String_Node_Str",account);
if (completeQuery.contains("String_Node_Str")) query.setParameter("String_Node_Str",groupList);
if (completeQuery.contains("String_Node_Str")) query.setParameter("String_Node_Str",accountList);
return query;
}