Function inferJavaFieldReceiverType

src/resolution/name-matcher.ts:1176–1223

* Java/Kotlin: infer a receiver's declared type by walking field declarations * in the class enclosing the call site. The field's `signature` is already in * the form " " (set by tree-sitter.ts extractField), so we * pull the type from there. Handles Spring `@Resource UserBO

(
  receiverName: string,
  ref: UnresolvedRef,
  context: ResolutionContext,
)

 * null when no matching field is in the enclosing class.
 */
function inferJavaFieldReceiverType(
  receiverName: string,
  ref: UnresolvedRef,
  context: ResolutionContext,
): string | null {
  const inFile = context.getNodesInFile(ref.filePath);
  if (inFile.length === 0) return null;

  // Find the class enclosing the call line (tightest match by latest start).
  let enclosing: Node | null = null;
  for (const n of inFile) {
    if (n.kind !== 'class' && n.kind !== 'interface') continue;
    if (n.language !== ref.language) continue;
    const end = n.endLine ?? n.startLine;
    if (n.startLine <= ref.line && end >= ref.line) {
      if (!enclosing || n.startLine >= enclosing.startLine) enclosing = n;
    }
  }
  if (!enclosing) return null;

  const enclosingEnd = enclosing.endLine ?? enclosing.startLine;
  const field = inFile.find(
    (n) =>
      n.kind === 'field' &&
      n.name === receiverName &&
      n.language === ref.language &&
      n.startLine >= enclosing.startLine &&
      (n.endLine ?? n.startLine) <= enclosingEnd,
  );
  if (!field || !field.signature) return null;

  // Signature shape: "<TypeName> <fieldName>" (extractField). Pull the type,
  // strip generics + dotted package, drop array/varargs markers.
  const beforeName = field.signature.slice(
    0,
    field.signature.lastIndexOf(field.name),
  );
  const typeRaw = beforeName.trim();
  if (!typeRaw) return null;

  const typeNoGenerics = typeRaw.replace(/<[^>]*>/g, '').trim();
  const typeNoArray = typeNoGenerics.replace(/\[\s*\]/g, '').replace(/\.\.\.$/, '').trim();
  const parts = typeNoArray.split(/[.\s]+/).filter(Boolean);
  const lastPart = parts[parts.length - 1];
  if (!lastPart) return null;
  if (!/^[A-Z]/.test(lastPart)) return null; // primitives / lowercase → skip
  return lastPart;
}

// ── Local-variable receiver-type inference (#1108) ──────────────────────────
//