2 files changed, 30 insertions, 22 deletions

diff --git a/enigma-swing/src/main/java/cuchaz/enigma/gui/GuiController.java b/enigma-swing/src/main/java/cuchaz/enigma/gui/GuiController.java
index 0eecc7ba..2c153050 100644
--- a/enigma-swing/src/main/java/cuchaz/enigma/gui/GuiController.java
+++ b/enigma-swing/src/main/java/cuchaz/enigma/gui/GuiController.java
@@ -33,6 +33,7 @@ import net.fabricmc.mappingio.MappingReader;
 import net.fabricmc.mappingio.MappingWriter;
 import net.fabricmc.mappingio.tree.MemoryMappingTree;
 import net.fabricmc.mappingio.tree.VisitOrder;
+import net.fabricmc.mappingio.tree.VisitableMappingTree;
 
 import cuchaz.enigma.Enigma;
 import cuchaz.enigma.EnigmaProfile;
@@ -167,7 +168,7 @@ public class GuiController implements ClientPacketHandler {
                                         }
 
                                         progress.init(1, loadingMessage);
-                                        MemoryMappingTree mappingTree = new MemoryMappingTree();
+                                        VisitableMappingTree mappingTree = new MemoryMappingTree();
                                         MappingReader.read(path, format.getMappingIoCounterpart(), mappingTree);
                                         mappings = MappingIoConverter.fromMappingIo(mappingTree, progress);
                                 } else {
@@ -229,7 +230,7 @@ public class GuiController implements ClientPacketHandler {
                         loadedMappingPath = path;
 
                         if (useMappingIo) {
-                                MemoryMappingTree mappingTree = MappingIoConverter.toMappingIo(mapper.getObfToDeobf(), progress);
+                                VisitableMappingTree mappingTree = MappingIoConverter.toMappingIo(mapper.getObfToDeobf(), progress);
 
                                 progress.init(1, I18n.translate("progress.mappings.writing"));
                                 MappingWriter writer = MappingWriter.create(path, format.getMappingIoCounterpart());
diff --git a/enigma/src/main/java/cuchaz/enigma/translation/mapping/serde/MappingIoConverter.java b/enigma/src/main/java/cuchaz/enigma/translation/mapping/serde/MappingIoConverter.java
index 05d862a6..a0912faf 100644
--- a/enigma/src/main/java/cuchaz/enigma/translation/mapping/serde/MappingIoConverter.java
+++ b/enigma/src/main/java/cuchaz/enigma/translation/mapping/serde/MappingIoConverter.java
@@ -1,5 +1,7 @@
 package cuchaz.enigma.translation.mapping.serde;
 
+import java.io.IOException;
+import java.io.UncheckedIOException;
 import java.util.Deque;
 import java.util.LinkedList;
 import java.util.List;
@@ -7,6 +9,7 @@ import java.util.stream.StreamSupport;
 
 import net.fabricmc.mappingio.MappedElementKind;
 import net.fabricmc.mappingio.tree.MemoryMappingTree;
+import net.fabricmc.mappingio.tree.VisitableMappingTree;
 import net.fabricmc.mappingio.tree.MappingTree.ClassMapping;
 import net.fabricmc.mappingio.tree.MappingTree.FieldMapping;
 import net.fabricmc.mappingio.tree.MappingTree.MethodArgMapping;
@@ -29,27 +32,31 @@ import cuchaz.enigma.translation.representation.entry.MethodEntry;
 import cuchaz.enigma.utils.I18n;
 
 public class MappingIoConverter {
-        public static MemoryMappingTree toMappingIo(EntryTree<EntryMapping> mappings, ProgressListener progress) {
-                List<EntryTreeNode<EntryMapping>> classes = StreamSupport.stream(mappings.spliterator(), false)
-                                .filter(node -> node.getEntry() instanceof ClassEntry)
-                                .toList();
+        public static VisitableMappingTree toMappingIo(EntryTree<EntryMapping> mappings, ProgressListener progress) {
+                try {
+                        List<EntryTreeNode<EntryMapping>> classes = StreamSupport.stream(mappings.spliterator(), false)
+                                        .filter(node -> node.getEntry() instanceof ClassEntry)
+                                        .toList();
 
-                progress.init(classes.size(), I18n.translate("progress.mappings.converting.to_mappingio"));
-                int steps = 0;
+                        progress.init(classes.size(), I18n.translate("progress.mappings.converting.to_mappingio"));
+                        int steps = 0;
 
-                MemoryMappingTree mappingTree = new MemoryMappingTree();
-                mappingTree.visitNamespaces("intermediary", List.of("named"));
+                        MemoryMappingTree mappingTree = new MemoryMappingTree();
+                        mappingTree.visitNamespaces("intermediary", List.of("named"));
 
-                for (EntryTreeNode<EntryMapping> classNode : classes) {
-                        progress.step(steps++, classNode.getEntry().getFullName());
-                        writeClass(classNode, mappings, mappingTree);
-                }
+                        for (EntryTreeNode<EntryMapping> classNode : classes) {
+                                progress.step(steps++, classNode.getEntry().getFullName());
+                                writeClass(classNode, mappings, mappingTree);
+                        }
 
-                mappingTree.visitEnd();
-                return mappingTree;
+                        mappingTree.visitEnd();
+                        return mappingTree;
+                } catch (IOException e) {
+                        throw new UncheckedIOException(e);
+                }
         }
 
-        private static void writeClass(EntryTreeNode<EntryMapping> classNode, EntryMap<EntryMapping> oldMappingTree, MemoryMappingTree newMappingTree) {
+        private static void writeClass(EntryTreeNode<EntryMapping> classNode, EntryMap<EntryMapping> oldMappingTree, VisitableMappingTree newMappingTree) throws IOException {
                 ClassEntry classEntry = (ClassEntry) classNode.getEntry();
                 EntryMapping mapping = oldMappingTree.get(classEntry);
                 Deque<String> parts = new LinkedList<>();
@@ -83,7 +90,7 @@ public class MappingIoConverter {
                 }
         }
 
-        private static void writeField(EntryTreeNode<EntryMapping> fieldNode, MemoryMappingTree mappingTree) {
+        private static void writeField(EntryTreeNode<EntryMapping> fieldNode, VisitableMappingTree mappingTree) throws IOException {
                 if (fieldNode.getValue() == null || fieldNode.getValue().equals(EntryMapping.DEFAULT)) {
                         return; // Shortcut
                 }
@@ -101,7 +108,7 @@ public class MappingIoConverter {
                 mappingTree.visitComment(MappedElementKind.FIELD, fieldMapping.javadoc());
         }
 
-        private static void writeMethod(EntryTreeNode<EntryMapping> methodNode, MemoryMappingTree mappingTree) {
+        private static void writeMethod(EntryTreeNode<EntryMapping> methodNode, VisitableMappingTree mappingTree) throws IOException {
                 MethodEntry methodEntry = ((MethodEntry) methodNode.getEntry());
                 mappingTree.visitMethod(methodEntry.getName(), methodEntry.getDesc().toString());
 
@@ -127,7 +134,7 @@ public class MappingIoConverter {
                 }
         }
 
-        private static void writeMethodArg(EntryTreeNode<EntryMapping> argNode, MemoryMappingTree mappingTree) {
+        private static void writeMethodArg(EntryTreeNode<EntryMapping> argNode, VisitableMappingTree mappingTree) throws IOException {
                 if (argNode.getValue() == null || argNode.getValue().equals(EntryMapping.DEFAULT)) {
                         return; // Shortcut
                 }
@@ -145,7 +152,7 @@ public class MappingIoConverter {
                 mappingTree.visitComment(MappedElementKind.METHOD_ARG, argMapping.javadoc());
         }
 
-        private static void writeMethodVar(EntryTreeNode<EntryMapping> varNode, MemoryMappingTree mappingTree) {
+        private static void writeMethodVar(EntryTreeNode<EntryMapping> varNode, VisitableMappingTree mappingTree) throws IOException {
                 if (varNode.getValue() == null || varNode.getValue().equals(EntryMapping.DEFAULT)) {
                         return; // Shortcut
                 }
@@ -163,7 +170,7 @@ public class MappingIoConverter {
                 mappingTree.visitComment(MappedElementKind.METHOD_VAR, varMapping.javadoc());
         }
 
-        public static EntryTree<EntryMapping> fromMappingIo(MemoryMappingTree mappingTree, ProgressListener progress) {
+        public static EntryTree<EntryMapping> fromMappingIo(VisitableMappingTree mappingTree, ProgressListener progress) {
                 EntryTree<EntryMapping> dstMappingTree = new HashEntryTree<>();
                 progress.init(mappingTree.getClasses().size(), I18n.translate("progress.mappings.converting.from_mappingio"));
                 int steps = 0;