Wtf why this is not added

arclight-common/src/main/java/io/izzel/arclight/common/mod/util/remapper/resource/RemapSourceHandler.java

@@ -0,0 +1,76 @@
+package io.izzel.arclight.common.mod.util.remapper.resource;
+
+import com.google.common.io.ByteStreams;
+import io.izzel.arclight.api.Unsafe;
+import io.izzel.arclight.common.mod.util.remapper.ArclightRemapper;
+import io.izzel.arclight.common.mod.util.remapper.GlobalClassRepo;
+import org.objectweb.asm.ClassReader;
+import org.objectweb.asm.ClassWriter;
+import org.objectweb.asm.tree.ClassNode;
+import org.spongepowered.asm.service.MixinService;
+
+import java.io.ByteArrayInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.lang.invoke.MethodHandle;
+import java.net.URL;
+import java.net.URLConnection;
+import java.net.URLStreamHandler;
+import java.util.Hashtable;
+
+public class RemapSourceHandler extends URLStreamHandler {
+
+    @Override
+    protected URLConnection openConnection(URL u) throws IOException {
+        return new RemapSourceConnection(new URL(u.getFile()));
+    }
+
+    private static class RemapSourceConnection extends URLConnection {
+
+        private byte[] array;
+
+        protected RemapSourceConnection(URL url) {
+            super(url);
+        }
+
+        @Override
+        public void connect() throws IOException {
+            byte[] bytes = ByteStreams.toByteArray(url.openStream());
+            String className = new ClassReader(bytes).getClassName();
+            if (className.startsWith("net/minecraft/")) {
+                try {
+                    ClassNode classNode = MixinService.getService().getBytecodeProvider().getClassNode(className);
+                    ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
+                    classNode.accept(cw);
+                    bytes = cw.toByteArray();
+                } catch (ClassNotFoundException e) {
+                    throw new IOException(e);
+                }
+            }
+            this.array = ArclightRemapper.getResourceMapper().remapClassFile(bytes, GlobalClassRepo.INSTANCE);
+        }
+
+        @Override
+        public InputStream getInputStream() throws IOException {
+            connect();
+            if (this.array == null) {
+                throw new FileNotFoundException(this.url.getFile());
+            } else {
+                return new ByteArrayInputStream(this.array);
+            }
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    public static void register() {
+        try {
+            Unsafe.ensureClassInitialized(URL.class);
+            MethodHandle getter = Unsafe.lookup().findStaticGetter(URL.class, "handlers", Hashtable.class);
+            Hashtable<String, URLStreamHandler> handlers = (Hashtable<String, URLStreamHandler>) getter.invokeExact();
+            handlers.put("remap", new RemapSourceHandler());
+        } catch (Throwable e) {
+            throw new RuntimeException(e);
+        }
+    }
+}