Function javaFileScope

src/resolution/name-matcher.ts:1859–1872

A Java file's package, its single-type imports and its on-demand (`.*`) imports, static ones included.

(file: string, context: ResolutionContext)

/** A Java file's package, its single-type imports and its on-demand (`.*`) imports, static ones included. */
function javaFileScope(file: string, context: ResolutionContext): { pkg: string; single: Set<string>; demand: Set<string> } {
  let memo = JAVA_FILE_SCOPES.get(context);
  if (!memo) JAVA_FILE_SCOPES.set(context, (memo = new Map()));
  const hit = memo.get(file);
  if (hit) return hit;
  const text = stripCommentsForRegex(context.readFile(file) ?? '', 'java');
  const pkg = /^\s*package\s+([\w.]+)\s*;/m.exec(text)?.[1] ?? '';
  const single = new Set<string>();
  const demand = new Set<string>();
  for (const m of text.matchAll(/^\s*import\s+(?:static\s+)?([\w.]+?)(\.\*)?\s*;/gm)) (m[2] ? demand : single).add(m[1]!);
  const scope = { pkg, single, demand };
  memo.set(file, scope);
  return scope;
}

/** The simple names of the Java types `qn` extends or implements, a few levels up. */
function javaAncestorNames(qn: string, context: ResolutionContext, depth = 0): Set<string> {