fix class parsing for enigma format

Author: ix0rai

enigma/src/main/java/cuchaz/enigma/translation/mapping/serde/RawEntryMapping.java

@@ -2,14 +2,15 @@
 
 import cuchaz.enigma.translation.mapping.EntryMapping;
 
+import javax.annotation.Nullable;
 import java.util.ArrayList;
 import java.util.List;
 
 public final class RawEntryMapping {
 	private final String targetName;
 	private final List<String> javadocs = new ArrayList<>();
 
-	public RawEntryMapping(String targetName) {
+	public RawEntryMapping(@Nullable String targetName) {
 		this.targetName = targetName != null && !targetName.equals("-") ? targetName : null;
 	}
 

enigma/src/main/java/cuchaz/enigma/translation/mapping/serde/enigma/EnigmaMappingsReader.java

@@ -32,6 +32,7 @@
 import java.util.Deque;
 import java.util.List;
 import java.util.Locale;
+import java.util.stream.Stream;
 
 public enum EnigmaMappingsReader implements MappingsReader {
 	FILE {
@@ -56,10 +57,13 @@ public EntryTree<EntryMapping> read(Path root, ProgressListener progress, Mappin
 
 			EntryTree<EntryMapping> mappings = new HashEntryTree<>();
 
-			List<Path> files = Files.walk(root)
+			List<Path> files;
+			try (Stream<Path> fileStream = Files.walk(root)) {
+				files = fileStream
 					.filter(f -> !Files.isDirectory(f))
 					.filter(f -> f.toString().endsWith(".mapping"))
 					.toList();
+			}
 
 			progress.init(files.size(), I18n.translate("progress.mappings.enigma_directory.loading"));
 			int step = 0;
@@ -85,34 +89,6 @@ public EntryTree<EntryMapping> read(Path zip, ProgressListener progress, Mapping
 		}
 	};
 
-	/**
-	 * Reads multiple Enigma mapping files.
-	 *
-	 * @param progress the progress listener
-	 * @param paths	the Enigma files to read; cannot be empty
-	 * @return the parsed mappings
-	 * @throws MappingParseException	if a mapping file cannot be parsed
-	 * @throws IOException			  if an IO error occurs
-	 * @throws IllegalArgumentException if there are no paths to read
-	 */
-	public static EntryTree<EntryMapping> readFiles(ProgressListener progress, Path... paths) throws MappingParseException, IOException {
-		EntryTree<EntryMapping> mappings = new HashEntryTree<>();
-
-		if (paths.length == 0) {
-			throw new IllegalArgumentException("No paths to read mappings from");
-		}
-
-		progress.init(paths.length, I18n.translate("progress.mappings.enigma_directory.loading"));
-		int step = 0;
-
-		for (Path file : paths) {
-			progress.step(step++, paths.toString());
-			readFile(file, mappings);
-		}
-
-		return mappings;
-	}
-
 	private static void readFile(Path path, EntryTree<EntryMapping> mappings) throws IOException, MappingParseException {
 		List<String> lines = Files.readAllLines(path, StandardCharsets.UTF_8);
 		Deque<MappingPair<?, RawEntryMapping>> mappingStack = new ArrayDeque<>();
@@ -245,7 +221,12 @@ private static MappingPair<ClassEntry, RawEntryMapping> parseClass(@Nullable Ent
 			obfuscatedEntry = new ClassEntry(obfuscatedName);
 		}
 
-		String mapping = tokens[2];
+		String mapping = null;
+		if (tokens.length == 3) {
+			mapping = tokens[2];
+		} else if (tokens.length != 2) {
+			throw new RuntimeException("invalid class declaration: not enough tokens (" + tokens.length +  " found, 2 needed)!");
+		}
 
 		return new MappingPair<>(obfuscatedEntry, new RawEntryMapping(mapping));
 	}