src/java.base/share/classes/jdk/internal/classfile/impl/DirectFieldBuilder.java

@@ -34,11 +34,11 @@
  
  import static java.util.Objects.requireNonNull;
  
  public final class DirectFieldBuilder
          extends AbstractDirectBuilder<FieldModel>
-         implements TerminalFieldBuilder, Util.Writable {
+         implements TerminalFieldBuilder, WritableField {
      private final Utf8Entry name;
      private final Utf8Entry desc;
      private int flags;
  
      public DirectFieldBuilder(SplitConstantPool constantPool,

@@ -82,6 +82,22 @@
      @Override
      public void writeTo(BufWriterImpl buf) {
          buf.writeU2U2U2(flags, buf.cpIndex(name), buf.cpIndex(desc));
          attributes.writeTo(buf);
      }
+ 
+     // These values must only be accessed after the field is definitely configured
+     @Override
+     public Utf8Entry fieldName() {
+         return name;
+     }
+ 
+     @Override
+     public Utf8Entry fieldType() {
+         return desc;
+     }
+ 
+     @Override
+     public int fieldFlags() {
+         return flags;
+     }
  }