Allow reader/writer subclasses to provide the underlying file operations

1 files changed, 7 insertions, 0 deletions

diff --git a/src/main/java/cuchaz/enigma/throwables/MappingParseException.java b/src/main/java/cuchaz/enigma/throwables/MappingParseException.java
index cc5f650..b7e6d42 100644
--- a/src/main/java/cuchaz/enigma/throwables/MappingParseException.java
+++ b/src/main/java/cuchaz/enigma/throwables/MappingParseException.java
@@ -12,6 +12,7 @@
 package cuchaz.enigma.throwables;
 
 import java.io.File;
+import java.util.function.Supplier;
 
 public class MappingParseException extends Exception {
 
@@ -25,6 +26,12 @@ public class MappingParseException extends Exception {
                 filePath = file.getAbsolutePath();
         }
 
+        public MappingParseException(Supplier<String> filenameProvider, int line, String message) {
+                this.line = line;
+                this.message = message;
+                filePath = filenameProvider.get();
+        }
+
         @Override
         public String getMessage() {
                 return "Line " + line + ": " + message + " in file " + filePath;