hibernate query for Getting json key value pair with joins - mysql

Question

I am using REST , hibernate query language for getting some data from database with the help of joins in that query i need to fetch columns from two or more tables and i am getting the result record , and when i return that object through REST as json i am getting the json as in the follwoing format
{"table1col1value","table2col1value","table3colvalue","table1col2value","table2col2value"}
but i need to get the json data in the following format
{"table1colname1":"table1col1value","table2colname":"table2col1value","table1colname":"table3colvalue","table1colname":"table1col2value","table2colname":"table2col2value"}
for that i am using the following code and its working fine, but its working with sql query only i need it in HQL , please help me in this.
#Override
#Transactional
public List<Map<String,Object>> getMixProperties(List<String> keys,Set<String> s) {
StringBuilder sb = new StringBuilder();
sb.append("select ");
Iterator<String> i = keys.iterator();
int q = keys.size();
while (i.hasNext()) {
q=q-1;
if(q==0){
String n= i.next();
sb.append(" "+n);
}
else{
String n2= i.next();
sb.append(" "+n2+",");}
}
sb.append(" from Book Book "
+ " join Systems Systems ON Systems.idSystems =Book.idSystems "
+ " join Machine Machine ON Machine.id =Systems.id ");
/*Iterator<String> iterator = s.iterator();
int q2 = s.size();String s5 = null;
while(iterator.hasNext()) {
String s4 = iterator.next();
q2=q2-1;
if(q2==0){
sb.append(" "+s4+" "+s4);
}
else{
s5=s4;
sb.append(" "+s4+" "+s4+",");}
}*/
System.out.println("query "+sb);
String sbb = sb.toString();
Query query=sessionFactory.getCurrentSession().createSQLQuery(sbb);
query.setResultTransformer(AliasToEntityMapResultTransformer.INSTANCE);
List<Map<String,Object>> aliasToValueMapList=query.list();
return aliasToValueMapList;
}
in this above code List keys will be the column name of different tables and (set s will be table names, but i am not using it in current code)
even this is working only if i have both class and db table name are same and property and column names are same, if its not same then its not working.
I am getting JSON only if i have the pojo class , but in my case result set can be any number of columns so its depends on runtime only , please help me in this