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json_info_codec.dart
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json_info_codec.dart
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// Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
/// Converters and codecs for converting between JSON and [Info] classes.
part of dart2js_info.info;
// TODO(sigmund): add unit tests.
class JsonToAllInfoConverter extends Converter<Map<String, dynamic>, AllInfo> {
Map<String, Info> registry = <String, Info>{};
AllInfo convert(Map<String, dynamic> json) {
registry.clear();
var result = new AllInfo();
var elements = json['elements'];
result.libraries
.addAll((elements['library'] as Map).values.map(parseLibrary));
result.classes.addAll((elements['class'] as Map).values.map(parseClass));
result.functions
.addAll((elements['function'] as Map).values.map(parseFunction));
result.closures
.addAll((elements['closure'] as Map).values.map(parseClosure));
result.fields.addAll((elements['field'] as Map).values.map(parseField));
result.typedefs
.addAll((elements['typedef'] as Map).values.map(parseTypedef));
result.constants
.addAll((elements['constant'] as Map).values.map(parseConstant));
var idMap = <String, Info>{};
for (var f in result.functions) {
idMap[f.serializedId] = f;
}
for (var f in result.fields) {
idMap[f.serializedId] = f;
}
json['holding'].forEach((k, deps) {
var src = idMap[k];
assert(src != null);
for (var dep in deps) {
var target = idMap[dep['id']];
assert(target != null);
(src as CodeInfo).uses.add(new DependencyInfo(target, dep['mask']));
}
});
json['dependencies']?.forEach((String k, List<String> deps) {
result.dependencies[idMap[k]] = deps.map((d) => idMap[d]).toList();
});
result.outputUnits
.addAll((json['outputUnits'] as List).map(parseOutputUnit));
result.program = parseProgram(json['program']);
// todo: version, etc
return result;
}
OutputUnitInfo parseOutputUnit(Map json) {
OutputUnitInfo result = parseId(json['id']);
result
..name = json['name']
..size = json['size'];
result.imports
.addAll((json['imports'] as List).map((s) => s as String) ?? const []);
return result;
}
LibraryInfo parseLibrary(Map json) {
LibraryInfo result = parseId(json['id']);
result
..name = json['name']
..uri = Uri.parse(json['canonicalUri'])
..outputUnit = parseId(json['outputUnit'])
..size = json['size'];
for (var child in json['children'].map(parseId)) {
if (child is FunctionInfo) {
result.topLevelFunctions.add(child);
} else if (child is FieldInfo) {
result.topLevelVariables.add(child);
} else if (child is ClassInfo) {
result.classes.add(child);
} else {
assert(child is TypedefInfo);
result.typedefs.add(child);
}
}
return result;
}
ClassInfo parseClass(Map json) {
ClassInfo result = parseId(json['id']);
result
..name = json['name']
..parent = parseId(json['parent'])
..outputUnit = parseId(json['outputUnit'])
..size = json['size']
..isAbstract = json['modifiers']['abstract'] == true;
assert(result is ClassInfo);
for (var child in json['children'].map(parseId)) {
if (child is FunctionInfo) {
result.functions.add(child);
} else {
assert(child is FieldInfo);
result.fields.add(child);
}
}
return result;
}
FieldInfo parseField(Map json) {
FieldInfo result = parseId(json['id']);
return result
..name = json['name']
..parent = parseId(json['parent'])
..coverageId = json['coverageId']
..outputUnit = parseId(json['outputUnit'])
..size = json['size']
..type = json['type']
..inferredType = json['inferredType']
..code = json['code']
..isConst = json['const'] ?? false
..initializer = parseId(json['initializer'])
..closures = (json['children'] as List).map(parseId).toList();
}
ConstantInfo parseConstant(Map json) {
ConstantInfo result = parseId(json['id']);
return result
..code = json['code']
..size = json['size']
..outputUnit = parseId(json['outputUnit']);
}
TypedefInfo parseTypedef(Map json) {
TypedefInfo result = parseId(json['id']);
return result
..name = json['name']
..parent = parseId(json['parent'])
..type = json['type']
..size = 0;
}
ProgramInfo parseProgram(Map json) => new ProgramInfo()
..entrypoint = parseId(json['entrypoint'])
..size = json['size']
..dart2jsVersion = json['dart2jsVersion']
..compilationMoment = DateTime.parse(json['compilationMoment'])
..compilationDuration =
new Duration(microseconds: json['compilationDuration'])
..toJsonDuration = new Duration(microseconds: json['toJsonDuration'])
..dumpInfoDuration = new Duration(microseconds: json['dumpInfoDuration'])
..noSuchMethodEnabled = json['noSuchMethodEnabled']
..minified = json['minified'];
FunctionInfo parseFunction(Map json) {
FunctionInfo result = parseId(json['id']);
return result
..name = json['name']
..parent = parseId(json['parent'])
..coverageId = json['coverageId']
..outputUnit = parseId(json['outputUnit'])
..size = json['size']
..type = json['type']
..returnType = json['returnType']
..inferredReturnType = json['inferredReturnType']
..parameters = (json['parameters'] as List).map(parseParameter).toList()
..code = json['code']
..sideEffects = json['sideEffects']
..modifiers =
parseModifiers(new Map<String, bool>.from(json['modifiers']))
..closures = (json['children'] as List).map(parseId).toList()
..measurements = parseMeasurements(json['measurements']);
}
ParameterInfo parseParameter(Map json) =>
new ParameterInfo(json['name'], json['type'], json['declaredType']);
Measurements parseMeasurements(Map json) {
if (json == null) return null;
var uri = json['sourceFile'];
var res = new Measurements(uri == null ? null : Uri.parse(uri));
for (var key in json.keys) {
var value = json[key];
if (value == null) continue;
if (key == 'entries') {
value.forEach((metricName, entries) {
var metric = new Metric.fromName(metricName);
for (var i = 0; i < entries.length; i += 2) {
res.record(metric, entries[i], entries[i + 1]);
}
});
} else {
res.counters[new Metric.fromName(key)] = value;
}
}
return res;
}
FunctionModifiers parseModifiers(Map<String, bool> json) {
return new FunctionModifiers(
isStatic: json['static'] == true,
isConst: json['const'] == true,
isFactory: json['factory'] == true,
isExternal: json['external'] == true);
}
ClosureInfo parseClosure(Map json) {
ClosureInfo result = parseId(json['id']);
return result
..name = json['name']
..parent = parseId(json['parent'])
..outputUnit = parseId(json['outputUnit'])
..size = json['size']
..function = parseId(json['function']);
}
Info parseId(String serializedId) => registry.putIfAbsent(serializedId, () {
if (serializedId == null) {
return null;
} else if (serializedId.startsWith('function/')) {
return new FunctionInfo._(serializedId);
} else if (serializedId.startsWith('closure/')) {
return new ClosureInfo._(serializedId);
} else if (serializedId.startsWith('library/')) {
return new LibraryInfo._(serializedId);
} else if (serializedId.startsWith('class/')) {
return new ClassInfo._(serializedId);
} else if (serializedId.startsWith('field/')) {
return new FieldInfo._(serializedId);
} else if (serializedId.startsWith('constant/')) {
return new ConstantInfo._(serializedId);
} else if (serializedId.startsWith('typedef/')) {
return new TypedefInfo._(serializedId);
} else if (serializedId.startsWith('outputUnit/')) {
return new OutputUnitInfo._(serializedId);
}
assert(false);
});
}
class AllInfoToJsonConverter extends Converter<AllInfo, Map>
implements InfoVisitor<Map> {
Map convert(AllInfo info) => info.accept(this);
Map _visitList(List<Info> infos) {
var map = <String, Map>{};
for (var info in infos) {
map['${info.id}'] = info.accept(this);
}
return map;
}
Map _visitAllInfoElements(AllInfo info) {
var jsonLibraries = _visitList(info.libraries);
var jsonClasses = _visitList(info.classes);
var jsonFunctions = _visitList(info.functions);
var jsonTypedefs = _visitList(info.typedefs);
var jsonFields = _visitList(info.fields);
var jsonConstants = _visitList(info.constants);
var jsonClosures = _visitList(info.closures);
return {
'library': jsonLibraries,
'class': jsonClasses,
'function': jsonFunctions,
'typedef': jsonTypedefs,
'field': jsonFields,
'constant': jsonConstants,
'closure': jsonClosures,
};
}
Map _visitDependencyInfo(DependencyInfo info) =>
{'id': info.target.serializedId, 'mask': info.mask};
Map _visitAllInfoHolding(AllInfo allInfo) {
var map = <String, List>{};
void helper(CodeInfo info) {
if (info.uses.isEmpty) return;
map[info.serializedId] =
info.uses.map((u) => _visitDependencyInfo(u)).toList();
}
allInfo.functions.forEach(helper);
allInfo.fields.forEach(helper);
return map;
}
Map _visitAllInfoDependencies(AllInfo allInfo) {
var map = <String, List>{};
allInfo.dependencies.forEach((k, v) {
map[k.serializedId] = v.map((i) => i.serializedId).toList();
});
return map;
}
Map visitAll(AllInfo info) {
var elements = _visitAllInfoElements(info);
var jsonHolding = _visitAllInfoHolding(info);
var jsonDependencies = _visitAllInfoDependencies(info);
return {
'elements': elements,
'holding': jsonHolding,
'dependencies': jsonDependencies,
'outputUnits': info.outputUnits.map((u) => u.accept(this)).toList(),
'dump_version': info.version,
'deferredFiles': info.deferredFiles,
'dump_minor_version': '${info.minorVersion}',
'program': info.program.accept(this)
};
}
Map visitProgram(ProgramInfo info) {
return {
'entrypoint': info.entrypoint.serializedId,
'size': info.size,
'dart2jsVersion': info.dart2jsVersion,
'compilationMoment': '${info.compilationMoment}',
'compilationDuration': info.compilationDuration.inMicroseconds,
'toJsonDuration': info.toJsonDuration.inMicroseconds,
'dumpInfoDuration': info.dumpInfoDuration.inMicroseconds,
'noSuchMethodEnabled': info.noSuchMethodEnabled,
'minified': info.minified,
};
}
Map _visitBasicInfo(BasicInfo info) {
var res = {
'id': info.serializedId,
'kind': kindToString(info.kind),
'name': info.name,
'size': info.size,
};
// TODO(sigmund): Omit this also when outputUnit.id == 0 (most code is in
// the main output unit by default).
if (info.outputUnit != null) {
res['outputUnit'] = info.outputUnit.serializedId;
}
if (info.coverageId != null) res['coverageId'] = info.coverageId;
if (info.parent != null) res['parent'] = info.parent.serializedId;
return res;
}
Map visitLibrary(LibraryInfo info) {
return _visitBasicInfo(info)
..addAll({
'children': []
..addAll(info.topLevelFunctions.map((f) => f.serializedId))
..addAll(info.topLevelVariables.map((v) => v.serializedId))
..addAll(info.classes.map((c) => c.serializedId))
..addAll(info.typedefs.map((t) => t.serializedId)),
'canonicalUri': '${info.uri}',
});
}
Map visitClass(ClassInfo info) {
return _visitBasicInfo(info)
..addAll({
// TODO(sigmund): change format, include only when abstract is true.
'modifiers': {'abstract': info.isAbstract},
'children': []
..addAll(info.fields.map((f) => f.serializedId))
..addAll(info.functions.map((m) => m.serializedId))
});
}
Map visitField(FieldInfo info) {
var result = _visitBasicInfo(info)
..addAll({
'children': info.closures.map((i) => i.serializedId).toList(),
'inferredType': info.inferredType,
'code': info.code,
'type': info.type,
});
if (info.isConst) {
result['const'] = true;
if (info.initializer != null) {
result['initializer'] = info.initializer.serializedId;
}
}
return result;
}
Map visitConstant(ConstantInfo info) =>
_visitBasicInfo(info)..addAll({'code': info.code});
// TODO(sigmund): exclude false values (requires bumping the format version):
// var res = <String, bool>{};
// if (isStatic) res['static'] = true;
// if (isConst) res['const'] = true;
// if (isFactory) res['factory'] = true;
// if (isExternal) res['external'] = true;
// return res;
Map _visitFunctionModifiers(FunctionModifiers mods) => {
'static': mods.isStatic,
'const': mods.isConst,
'factory': mods.isFactory,
'external': mods.isExternal,
};
Map _visitParameterInfo(ParameterInfo info) =>
{'name': info.name, 'type': info.type, 'declaredType': info.declaredType};
String _visitMetric(Metric metric) => metric.name;
Map _visitMeasurements(Measurements measurements) {
if (measurements == null) return null;
var jsonEntries = <String, List<int>>{};
measurements.entries.forEach((metric, values) {
jsonEntries[_visitMetric(metric)] =
values.expand((e) => [e.begin, e.end]).toList();
});
var json = <String, dynamic>{'entries': jsonEntries};
// TODO(sigmund): encode uri as an offset of the URIs available in the parts
// of the library info.
if (measurements.uri != null) json['sourceFile'] = '${measurements.uri}';
if (measurements.counters[Metric.functions] != null) {
json[_visitMetric(Metric.functions)] =
measurements.counters[Metric.functions];
}
if (measurements.counters[Metric.reachableFunctions] != null) {
json[_visitMetric(Metric.reachableFunctions)] =
measurements.counters[Metric.reachableFunctions];
}
return json;
}
Map visitFunction(FunctionInfo info) {
return _visitBasicInfo(info)
..addAll({
'children': info.closures.map((i) => i.serializedId).toList(),
'modifiers': _visitFunctionModifiers(info.modifiers),
'returnType': info.returnType,
'inferredReturnType': info.inferredReturnType,
'parameters':
info.parameters.map((p) => _visitParameterInfo(p)).toList(),
'sideEffects': info.sideEffects,
'inlinedCount': info.inlinedCount,
'code': info.code,
'type': info.type,
'measurements': _visitMeasurements(info.measurements),
// Note: version 3.2 of dump-info serializes `uses` in a section called
// `holding` at the top-level.
});
}
Map visitClosure(ClosureInfo info) {
return _visitBasicInfo(info)
..addAll({'function': info.function.serializedId});
}
visitTypedef(TypedefInfo info) => _visitBasicInfo(info)..['type'] = info.type;
visitOutput(OutputUnitInfo info) =>
_visitBasicInfo(info)..['imports'] = info.imports;
}
class AllInfoJsonCodec extends Codec<AllInfo, Map> {
final Converter<AllInfo, Map> encoder = new AllInfoToJsonConverter();
final Converter<Map, AllInfo> decoder = new JsonToAllInfoConverter();
}