Support serialization of the compiler backbone.

pkg/compiler/lib/src/serialization/json_serializer.dart

+// 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.
+
+library dart2js.serialization.json;
+
+import 'dart:convert';
+import '../constants/expressions.dart';
+import '../dart_types.dart';
+import '../elements/elements.dart';
+import 'keys.dart';
+import 'serialization.dart';
+import 'values.dart';
+
+/// Serialization encoder for JSON.
+class JsonSerializationEncoder implements SerializationEncoder {
+  const JsonSerializationEncoder();
+
+  String encode(ObjectValue objectValue) {
+    return new JsonEncoder.withIndent(' ').convert(
+        const JsonObjectEncoder().apply(objectValue));
+  }
+
+  JsonDataObject createDataObject(IntValue id, EnumValue kind) {
+    return new JsonDataObject(id, kind);
+  }
+
+  ObjectSerializer createObjectSerializer(Serializer serializer,
+                                          JsonDataObject dataObject) {
+    return new MapBasedObjectSerializer(serializer, dataObject.map);
+  }
+}
+
+/// Serialiation decoder for JSON.

[floitsch, 2015/06/26 20:54:04]

Serialization

[Johnni Winther, 2015/07/03 12:13:45]

Done.

+class JsonSerializationDecoder implements SerializationDecoder {
+  const JsonSerializationDecoder();
+
+  decode(String text) => JSON.decode(text);
+
+  List readMainData(Map mainData, Key key) => mainData[key.name];
+
+  readEntry(Map data, key) => data[key.toString()];
+}
+
+/// A map based [DataObject].
+class JsonDataObject implements DataObject {
+  final Value id;
+  final ObjectValue objectValue;
+
+  JsonDataObject(Value id, EnumValue kind)
+      : this.id = id,
+        this.objectValue =
+            new ObjectValue(<Key, Value>{Key.ID: id, Key.KIND: kind});
+
+  Map<Key, Value> get map => objectValue.map;
+}
+
+/// An [AbstractSerializer] that stores the values in a [Map].
+abstract class AbstractMapBasedSerializer<K> implements AbstractSerializer<K> {
+  final Serializer _serializer;
+  final Map<K, Value> _map;
+
+  AbstractMapBasedSerializer(this._serializer, this._map);
+
+  @override
+  ListSerializer createList(K key) {
+    List<Value> list = <Value>[];
+    _map[key] = new ListValue(list);
+    return new ListBasedListSerializer(_serializer, list);
+  }
+
+  @override
+  MapSerializer createMap(K key) {
+    Map<String, Value> map = <String, Value>{};
+    _map[key] = new MapValue(map);
+    return new MapBasedMapSerializer(_serializer, map);
+  }
+
+  @override
+  ObjectSerializer createObject(K key) {
+    Map<Key, Value> map = <Key, Value>{};
+    _map[key] = new ObjectValue(map);
+    return new MapBasedObjectSerializer(_serializer, map);
+  }
+
+  @override
+  void setBool(K key, bool value) {
+    _serializer.setBool(_map, key, value);
+  }
+
+  @override
+  void setConstant(K key, ConstantExpression constant) {
+    _serializer.setConstant(_map, key, constant);
+  }
+
+  @override
+  void setConstants(K key, Iterable<ConstantExpression> constants) {
+    _serializer.setConstants(_map, key, constants);
+  }
+
+  @override
+  void setDouble(K key, double value) {
+    _serializer.setDouble(_map, key, value);
+  }
+
+  @override
+  void setElement(K key, Element element) {
+    _serializer.setElement(_map, key, element);
+  }
+
+  @override
+  void setElements(K key, Iterable<Element> elements) {
+    _serializer.setElements(_map, key, elements);
+  }
+
+  @override
+  void setEnum(K key, value) {
+    _serializer.setEnum(_map, key, value);
+  }
+
+  @override
+  void setInt(K key, int value) {
+    _serializer.setInt(_map, key, value);
+  }
+
+  @override
+  void setInts(K key, List<int> values) {
+    _serializer.setInts(_map, key, values);
+  }
+
+  @override
+  void setString(K key, String value) {
+    _serializer.setString(_map, key, value);
+  }
+
+  @override
+  void setStrings(K key, Iterable<String> values) {
+    _serializer.setStrings(_map, key, values);
+  }
+
+  @override
+  void setType(K key, DartType type) {
+    _serializer.setType(_map, key, type);
+  }
+
+  @override
+  void setTypes(K key, List<DartType> types) {
+    _serializer.setTypes(_map, key, types);
+  }
+
+  @override
+  void setUri(K key, Uri baseUri, Uri uri) {
+    _serializer.setUri(_map, key, baseUri, uri);
+  }
+
+  String toString() => _map.toString();
+}
+
+/// An [ObjectSerializer] that stores the values in a [Map].
+class MapBasedObjectSerializer extends AbstractMapBasedSerializer
+    implements ObjectSerializer {
+  MapBasedObjectSerializer(Serializer serializer, Map<dynamic, Value> map)
+      : super(serializer, map);
+}
+
+/// An [MapSerializer] that stores the values in a [Map].
+class MapBasedMapSerializer extends AbstractMapBasedSerializer<String>
+    implements MapSerializer {
+  MapBasedMapSerializer(Serializer serializer, Map<String, Value> map)
+      : super(serializer, map);
+}
+
+/// An [ListSerializer] that stores the values in a [List].
+class ListBasedListSerializer implements ListSerializer {
+  final Serializer _serializer;
+  final List<Value> _list;
+
+  ListBasedListSerializer(this._serializer, this._list);
+
+  @override
+  MapSerializer createMap() {
+    Map<String, Value> map = {};
+    _list.add(new MapValue(map));
+    return new MapBasedMapSerializer(_serializer, map);
+  }
+
+  @override
+  ObjectSerializer createObject() {
+    Map<Key, Value> map = <Key, Value>{};
+    _list.add(new ObjectValue(map));
+    return new MapBasedObjectSerializer(_serializer, map);
+  }
+}
+
+/// Base implementation of [AbstractDeserializer] based on a JSON encoded [Map].
+abstract class AbstractJsonDeserializer<K> implements AbstractDeserializer<K> {
+  final Deserializer _deserializer;
+  final Map<K, dynamic> _map;
+
+  AbstractJsonDeserializer(this._deserializer, this._map) {
+    assert(_deserializer != null);
+    assert(_map != null);
+  }
+
+  @override
+  bool getBool(K key, {bool isOptional: false, bool defaultValue}) {
+    return _deserializer.getBool(
+        _map, key, isOptional: isOptional, defaultValue: defaultValue);
+  }
+
+  @override
+  ConstantExpression getConstant(K key, {bool isOptional: false}) {
+    return _deserializer.getConstant(_map, key, isOptional: isOptional);
+  }
+
+  @override
+  List<ConstantExpression> getConstants(K key, {bool isOptional: false}) {
+    return _deserializer.getConstants(_map, key, isOptional: isOptional);
+  }
+
+  @override
+  double getDouble(K key, {bool isOptional: false, double defaultValue}) {
+    return _deserializer.getDouble(
+        _map, key, isOptional: isOptional, defaultValue: defaultValue);
+  }
+
+  @override
+  Element getElement(K key, {bool isOptional: false}) {
+    return _deserializer.getElement(_map, key, isOptional: isOptional);
+  }
+
+  @override
+  List<Element> getElements(K key, {bool isOptional: false}) {
+    return _deserializer.getElements(_map, key, isOptional: isOptional);
+  }
+
+  @override
+  getEnum(K key, Iterable enumValues, {bool isOptional: false, defaultValue}) {
+    return _deserializer.getEnum(
+        _map, key, enumValues,
+        isOptional: isOptional, defaultValue: defaultValue);
+  }
+
+  @override
+  int getInt(K key, {bool isOptional: false, int defaultValue}) {
+    return _deserializer.getInt(
+        _map, key, isOptional: isOptional, defaultValue: defaultValue);
+  }
+
+  @override
+  List<int> getInts(K key, {bool isOptional: false}) {
+    return _deserializer.getInts(
+        _map, key, isOptional: isOptional);
+  }
+
+  @override
+  ListDeserializer getList(K key, {bool isOptional: false}) {
+    return _deserializer.getList(_map, key, isOptional: isOptional);
+  }
+
+  @override
+  MapDeserializer getMap(K key, {bool isOptional: false}) {
+    return _deserializer.getMap(_map, key, isOptional: isOptional);
+  }
+
+  @override
+  ObjectDeserializer getObject(K key, {bool isOptional: false}) {
+    return _deserializer.getObject(_map, key, isOptional: isOptional);
+  }
+
+  @override
+  String getString(K key, {bool isOptional: false, String defaultValue}) {
+    return _deserializer.getString(
+        _map, key, isOptional: isOptional, defaultValue: defaultValue);
+  }
+
+  @override
+  List<String> getStrings(K key, {bool isOptional: false}) {
+    return _deserializer.getStrings(_map, key, isOptional: isOptional);
+  }
+
+  @override
+  DartType getType(K key, {bool isOptional: false}) {
+    return _deserializer.getType(_map, key, isOptional: isOptional);
+  }
+
+  @override
+  List<DartType> getTypes(K key, {bool isOptional: false}) {
+    return _deserializer.getTypes(_map, key, isOptional: isOptional);
+  }
+
+  @override
+  Uri getUri(K key, {bool isOptional: false, Uri defaultValue}) {
+    return _deserializer.getUri(
+        _map, key, isOptional: isOptional, defaultValue: defaultValue);
+  }
+}
+
+/// [ObjectDeserializer] based on a JSON-encoded [Map].
+class JsonObjectDeserializer extends AbstractJsonDeserializer<Key>
+    implements ObjectDeserializer {
+  JsonObjectDeserializer(Deserializer deserializer, Map map)
+      : super(deserializer, map);
+
+  @override
+  bool containsKey(Key key) => _map.containsKey(key.name);
+}
+
+/// [MapDeserializer] based on a JSON-encoded [Map].
+class JsonMapDeserializer extends AbstractJsonDeserializer<String>
+    implements MapDeserializer {
+  JsonMapDeserializer(Deserializer deserializer, Map<String, dynamic> map)
+      : super(deserializer, map);
+
+  @override
+  bool containsKey(String key) => _map.containsKey(key);
+
+  @override
+  void forEachKey(f(String key)) {
+    _map.keys.forEach(f);
+  }
+}
+
+/// [ListDeserializer] based on a JSON encoded [List].
+class JsonListDeserializer implements ListDeserializer {
+  final Deserializer _deserializer;
+  final List _list;
+
+  JsonListDeserializer(this._deserializer, this._list);
+
+  @override
+  MapDeserializer getMap(int index) {
+    return new JsonMapDeserializer(_deserializer, _list[index]);
+  }
+
+  @override
+  ObjectDeserializer getObject(int index) {
+    return new JsonObjectDeserializer(_deserializer, _list[index]);
+  }
+
+  @override
+  int get length => _list.length;
+}
+
+/// A [ValueVisitor] that computes a JSON object value.
+class JsonObjectEncoder implements ValueVisitor {
+  const JsonObjectEncoder();
+
+  convert(Value value) => apply(value, this);
+
+  @override
+  apply(Value value, [arg]) => value.accept(this, arg);
+
+  @override
+  bool visitBool(BoolValue value, arg) => value.value;
+
+  @override
+  visitConstant(ConstantValue value, arg) => apply(value.id);
+
+  @override
+  double visitDouble(DoubleValue value, arg) => value.value;
+
+  @override
+  visitElement(ElementValue value, arg) => apply(value.id);
+
+  @override
+  visitEnum(EnumValue value, arg) => value.value.index;
+
+  @override
+  int visitInt(IntValue value, arg) => value.value;
+
+  @override
+  List visitList(ListValue value, arg) => value.values.map(apply).toList();
+
+  @override
+  Map visitMap(MapValue value, arg) {
+    Map<String, dynamic> map = <String, dynamic>{};
+    value.map.forEach((String key, Value value) {
+      map[key] = apply(value);
+    });
+    return map;
+  }
+
+  @override
+  Map visitObject(ObjectValue value, arg) {
+    Map<String, dynamic> map = <String, dynamic>{};
+    value.map.forEach((Key key, Value value) {
+      map[key.name] = apply(value);
+    });
+    return map;
+  }
+
+  @override
+  String visitString(StringValue value, arg) => value.value;
+
+  @override
+  visitType(TypeValue value, arg) => apply(value.id);
+
+  @override
+  visitUri(UriValue value, arg) => '${value.value}';
+}
+
+/// [ValueVisitor] that generates a verbose JSON-like output.
+class PrettyPrintEncoder implements ValueVisitor {
+  StringBuffer buffer;
+
+  String toText(Value value) {
+    buffer = new StringBuffer();
+    apply(value, '');
+    String text = buffer.toString();
+    buffer = null;
+    return text;
+  }
+
+  @override
+  void apply(Value value, String indentation) {
+    value.accept(this, indentation);
+  }
+
+  @override
+  void visitBool(BoolValue value, String indentation) {
+    buffer.write(value.value);
+  }
+
+  @override
+  void visitConstant(ConstantValue value, String indentation) {
+    buffer.write('Constant(${value.id}):${value.constant.getText()}');
+  }
+
+  @override
+  void visitDouble(DoubleValue value, String indentation) {
+    buffer.write(value.value);
+  }
+  @override
+  void visitElement(ElementValue value, String indentation) {
+    buffer.write('Element(${value.id}):${value.element}');
+  }
+
+  @override
+  void visitEnum(EnumValue value, String indentation) {
+    buffer.write(value.value);
+  }
+
+  @override
+  void visitInt(IntValue value, String indentation) {
+    buffer.write(value.value);
+  }
+
+  @override
+  void visitList(ListValue value, String indentation) {
+    if (value.values.isEmpty) {
+      buffer.write('[]');
+    } else {
+      buffer.write('[');
+      bool needsComma = false;
+      String nextIndentation = '${indentation}  ';
+      for (Value element in value.values) {
+        if (needsComma) {
+          buffer.write(',');
+        }
+        buffer.write('\n$nextIndentation');
+        apply(element, nextIndentation);
+        needsComma = true;
+      }
+      buffer.write('\n$indentation]');
+    }
+  }
+
+  @override
+  void visitMap(MapValue value, String indentation) {
+    if (value.map.isEmpty) {
+      buffer.write('{}');
+    } else {
+      buffer.write('{');
+      bool needsComma = false;
+      String nextIndentation = '${indentation}  ';
+      value.map.forEach((String key, Value subvalue) {
+        if (needsComma) {
+          buffer.write(',');
+        }
+        buffer.write('\n$nextIndentation$key: ');
+        apply(subvalue, nextIndentation);
+        needsComma = true;
+      });
+      buffer.write('\n$indentation}');
+    }
+  }
+
+  @override
+  void visitObject(ObjectValue value, String indentation) {
+    if (value.map.isEmpty) {
+      buffer.write('{}');
+    } else {
+      buffer.write('{');
+      bool needsComma = false;
+      String nextIndentation = '${indentation}  ';
+      value.map.forEach((Key key, Value subvalue) {
+        if (needsComma) {
+          buffer.write(',');
+        }
+        buffer.write('\n$nextIndentation$key: ');
+        apply(subvalue, nextIndentation);
+        needsComma = true;
+      });
+      buffer.write('\n$indentation}');
+    }
+  }
+
+  @override
+  void visitString(StringValue value, String indentation) {
+    buffer.write('"${value.value}"');
+  }
+
+  @override
+  void visitType(TypeValue value, String indentation) {
+    buffer.write('Type(${value.id}):${value.type}');
+  }
+
+  @override
+  void visitUri(UriValue value, String indentation) {
+    buffer.write('Uri(${value.value})');
+  }
+}