Sam Rawlins
2c13c7ea80
Change-Id: I496ed3abbb29ebef14542636aaf1b878f3420740 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/192288 Reviewed-by: Konstantin Shcheglov <scheglov@google.com> Commit-Queue: Samuel Rawlins <srawlins@google.com>
88 lines
2.5 KiB
Dart
88 lines
2.5 KiB
Dart
// Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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/// This file contains code for collecting statistics about the use of fields in
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/// a summary file.
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import 'dart:io';
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import 'dart:mirrors';
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import 'package:analyzer/src/summary/base.dart';
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import 'package:analyzer/src/summary/idl.dart';
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main(List<String> args) {
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if (args.length != 1) {
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_printUsage();
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exitCode = 1;
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return;
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}
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String inputFilePath = args[0];
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// Read the input.
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PackageBundle bundle =
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PackageBundle.fromBuffer(File(inputFilePath).readAsBytesSync());
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// Compute and output stats.
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Stats stats = Stats();
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stats.record(bundle);
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stats.dump();
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}
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/// The name of the stats tool.
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const String BINARY_NAME = "stats";
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/// Print information about how to use the stats tool.
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void _printUsage() {
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print('Usage: $BINARY_NAME input_file_path');
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}
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/// An instance of [Stats] keeps track of statistics about the use of fields in
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/// summary objects.
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class Stats {
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/// Map from type to field name to a count of how often the field is used.
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Map<Type, Map<String, int>> counts = <Type, Map<String, int>>{};
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/// Print out statistics gathered so far.
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void dump() {
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counts.forEach((Type type, Map<String, int> typeCounts) {
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print(type);
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List<String> keys = typeCounts.keys.toList();
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keys.sort((a, b) => typeCounts[b]!.compareTo(typeCounts[a]!));
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for (String key in keys) {
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print(' $key: ${typeCounts[key]}');
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}
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print('');
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});
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}
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/// Record statistics for [obj] and all objects it refers to.
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void record(SummaryClass obj) {
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Map<String, int> typeCounts =
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counts.putIfAbsent(obj.runtimeType, () => <String, int>{});
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obj.toMap().forEach((key, value) {
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if (value == null ||
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value == 0 ||
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value == false ||
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value == '' ||
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value is List && value.isEmpty ||
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// TODO(srawlins): Remove this and enumerate each enum which may
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// be encountered.
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// ignore: avoid_dynamic_calls
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reflect(value).type.isEnum && (value as dynamic).index == 0) {
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return;
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}
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typeCounts.update(key, (value) => value + 1, ifAbsent: () => 0);
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if (value is SummaryClass) {
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record(value);
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} else if (value is List) {
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value.forEach((element) {
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if (element is SummaryClass) {
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record(element);
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}
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});
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}
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});
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}
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}
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