refactor(jsonapi-exception): treat all errors as error collection

add overloads for throwing errors directly

Author: jaredcnance

src/JsonApiDotNetCore/Internal/JsonApiException.cs

@@ -4,28 +4,34 @@ namespace JsonApiDotNetCore.Internal
 {
     public class JsonApiException : Exception
     {
-        private string _statusCode;
-        private string _detail;
-        private string _message;
+        private ErrorCollection _errors = new ErrorCollection();
+
+        public JsonApiException(ErrorCollection errorCollection)
+        { 
+            _errors = errorCollection;
+        }
+
+        public JsonApiException(Error error)
+        : base(error.Title)
+        { 
+            _errors.Add(error);
+        }
 
         public JsonApiException(string statusCode, string message)
         : base(message)
         { 
-            _statusCode = statusCode;
-            _message = message;
+            _errors.Add(new Error(statusCode, message, null));
         }
 
         public JsonApiException(string statusCode, string message, string detail)
         : base(message)
         { 
-            _statusCode = statusCode;
-            _message = message;
-            _detail = detail;            
+            _errors.Add(new Error(statusCode, message, detail));
         }
 
-        public Error GetError()
+        public ErrorCollection GetError()
         {
-            return new Error(_statusCode, _message, _detail);
+            return _errors;
         }
     }
 }