utils class to get a list of all fields of an object, all required fields of an object etc... and more to come

metaDataUtils

public class metaDataUtils {
    public static Map<String, Schema.DescribeFieldResult> getFieldMetaData(String obj) {
        Map<String,Schema.DescribeFieldResult> finalMap = new Map<String, Schema.DescribeFieldResult>();
        Map<String, Schema.SObjectField> objectFields = Schema.getGlobalDescribe().get(obj).getDescribe().fields.getMap();        
                                              // getting a specific object fields 
        for(String fieldName: objectFields.keySet()){
            finalMap.put(fieldName, objectFields.get(fieldName).getDescribe());
        } 
        return finalMap;
    }
    
    public static List<String> getRequiredFields(String obj){
        List<String> requiredFields = new List<String>();
        Map<String,Schema.DescribeFieldResult> finalMap = getFieldMetaData(obj);
        for(String fr: finalMap.keySet()){            
            if(!finalMap.get(fr).isNillable()){
                requiredFields.add(fr);
            }
        }
        return requiredFields;
    }
}