Retrieving all SObject fields!

At some point you may require all the fields for an object and display data only for specific feilds and this may change with the requirement. A usecase would be in Lightning DataTables. Querying Schema class is the solution but its a whole deep pool of maps, wherein you need to drill down deep. Here, I will share my technique.

I like to combine it the Singleton pattern and boom we have a cocktail of good oops practice.

class Utility{

   private static Set<String> fieldList;

   public Set<String> getAllFields(String objName){
     if(fieldList == NULL){
       Map<String, Schema.SobjectType> schemaMap = Schema.getGlobalDescribe();
       Schema.SObjectType objectSchema = schemaMap.get(objName);
       Map<String, Schema.SObjectFields> fieldsMap = objectSchema.getDescribe().getFields.getMap();
       fieldsList = fieldsMap.keySet();
       return fieldList;
      }
   return fieldList;
  }
}