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smoke/lib/static.dart

Index: smoke/lib/static.dart
diff --git a/smoke/lib/static.dart b/smoke/lib/static.dart
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--- a/smoke/lib/static.dart
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-// Copyright (c) 2014, 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.
-
-/// Static implementation of smoke services using code-generated data.
-library smoke.static;
-
-import 'dart:math' as math;
-
-import 'package:smoke/smoke.dart';
-
-import 'src/common.dart';
-
-typedef T Getter<T>(object);
-typedef void Setter<T>(object, value);
-
-class StaticConfiguration {
-  /// Maps symbol to a function that reads that symbol of an object. For
-  /// instance, `#i: (o) => o.i`.
-  final Map<Symbol, Getter> getters;
-
-  /// Maps symbol to a function that updates that symbol of an object. For
-  /// instance, `#i: (o, v) { o.i = v; }`.
-  final Map<Symbol, Setter> setters;
-
-  /// Maps a type to its super class. For example, String: Object.
-  final Map<Type, Type> parents;
-
-  /// For each type, a map of declarations per symbol (property or method).
-  final Map<Type, Map<Symbol, Declaration>> declarations;
-
-  /// Static methods for each type.
-  // TODO(sigmund): should we add static getters & setters too?
-  final Map<Type, Map<Symbol, Function>> staticMethods;
-
-  /// A map from symbol to strings.
-  final Map<Symbol, String> names;
-
-  /// A map from strings to symbols (the reverse of [names]).
-  final Map<String, Symbol> _symbols = {};
-
-  /// Whether to check for missing declarations, otherwise, return default
-  /// values (for example a missing parent class can be treated as Object)
-  final bool checkedMode;
-
-  StaticConfiguration({Map<Symbol, Getter> getters, Map<Symbol, Setter> setters,
-      Map<Type, Type> parents, Map<Type, Map<Symbol, Declaration>> declarations,
-      Map<Type, Map<Symbol, Function>> staticMethods, Map<Symbol, String> names,
-      this.checkedMode: true})
-      : getters = getters != null ? getters : {},
-        setters = setters != null ? setters : {},
-        parents = parents != null ? parents : {},
-        declarations = declarations != null ? declarations : {},
-        staticMethods = staticMethods != null ? staticMethods : {},
-        names = names != null ? names : {} {
-    this.names.forEach((k, v) {
-      _symbols[v] = k;
-    });
-  }
-
-  void addAll(StaticConfiguration other) {
-    getters.addAll(other.getters);
-    setters.addAll(other.setters);
-    parents.addAll(other.parents);
-    _nestedAddAll(declarations, other.declarations);
-    _nestedAddAll(staticMethods, other.staticMethods);
-    names.addAll(other.names);
-    other.names.forEach((k, v) {
-      _symbols[v] = k;
-    });
-  }
-
-  static _nestedAddAll(Map a, Map b) {
-    for (var key in b.keys) {
-      a.putIfAbsent(key, () => {});
-      a[key].addAll(b[key]);
-    }
-  }
-}
-
-/// Set up the smoke package to use a static implementation based on the given
-/// [configuration].
-useGeneratedCode(StaticConfiguration configuration) {
-  configure(new GeneratedObjectAccessorService(configuration),
-      new GeneratedTypeInspectorService(configuration),
-      new GeneratedSymbolConverterService(configuration));
-}
-
-/// Implements [ObjectAccessorService] using a static configuration.
-class GeneratedObjectAccessorService implements ObjectAccessorService {
-  final StaticConfiguration _configuration;
-  Map<Symbol, Getter> get _getters => _configuration.getters;
-  Map<Symbol, Setter> get _setters => _configuration.setters;
-  Map<Type, Map<Symbol, Function>> get _staticMethods =>
-      _configuration.staticMethods;
-
-  GeneratedObjectAccessorService(this._configuration);
-
-  read(Object object, Symbol name) {
-    var getter = _getters[name];
-    if (getter == null) {
-      throw new MissingCodeException('getter "$name" in $object');
-    }
-    return getter(object);
-  }
-
-  void write(Object object, Symbol name, value) {
-    var setter = _setters[name];
-    if (setter == null) {
-      throw new MissingCodeException('setter "$name" in $object');
-    }
-    setter(object, value);
-  }
-
-  invoke(object, Symbol name, List args, {Map namedArgs, bool adjust: false}) {
-    var method;
-    if (object is Type && name != #toString) {
-      var classMethods = _staticMethods[object];
-      method = classMethods == null ? null : classMethods[name];
-    } else {
-      var getter = _getters[name];
-      method = getter == null ? null : getter(object);
-    }
-    if (method == null) {
-      throw new MissingCodeException('method "$name" in $object');
-    }
-    var tentativeError;
-    if (adjust) {
-      var min = minArgs(method);
-      if (min > SUPPORTED_ARGS) {
-        tentativeError = 'we tried to adjust the arguments for calling "$name"'
-            ', but we couldn\'t determine the exact number of arguments it '
-            'expects (it is more than $SUPPORTED_ARGS).';
-        // The argument list might be correct, so we still invoke the function
-        // and let the user see the error.
-        args = adjustList(args, min, math.max(min, args.length));
-      } else {
-        var max = maxArgs(method);
-        args = adjustList(args, min, max >= 0 ? max : args.length);
-      }
-    }
-    if (namedArgs != null) {
-      throw new UnsupportedError(
-          'smoke.static doesn\'t support namedArguments in invoke');
-    }
-    try {
-      return Function.apply(method, args);
-    } on NoSuchMethodError catch (e) {
-      // TODO(sigmund): consider whether this should just be in a logger or if
-      // we should wrap `e` as a new exception (what's the best way to let users
-      // know about this tentativeError?)
-      if (tentativeError != null) print(tentativeError);
-      rethrow;
-    }
-  }
-}
-
-/// Implements [TypeInspectorService] using a static configuration.
-class GeneratedTypeInspectorService implements TypeInspectorService {
-  final StaticConfiguration _configuration;
-
-  Map<Type, Type> get _parents => _configuration.parents;
-  Map<Type, Map<Symbol, Declaration>> get _declarations =>
-      _configuration.declarations;
-  bool get _checkedMode => _configuration.checkedMode;
-
-  GeneratedTypeInspectorService(this._configuration);
-
-  bool isSubclassOf(Type type, Type supertype) {
-    if (type == supertype || supertype == Object) return true;
-    while (type != Object) {
-      var parentType = _parents[type];
-      if (parentType == supertype) return true;
-      if (parentType == null) {
-        if (!_checkedMode) return false;
-        throw new MissingCodeException('superclass of "$type" ($parentType)');
-      }
-      type = parentType;
-    }
-    return false;
-  }
-
-  bool hasGetter(Type type, Symbol name) {
-    var decl = _findDeclaration(type, name);
-    // No need to check decl.isProperty because methods are also automatically
-    // considered getters (auto-closures).
-    return decl != null && !decl.isStatic;
-  }
-
-  bool hasSetter(Type type, Symbol name) {
-    var decl = _findDeclaration(type, name);
-    return decl != null && !decl.isMethod && !decl.isFinal && !decl.isStatic;
-  }
-
-  bool hasInstanceMethod(Type type, Symbol name) {
-    var decl = _findDeclaration(type, name);
-    return decl != null && decl.isMethod && !decl.isStatic;
-  }
-
-  bool hasStaticMethod(Type type, Symbol name) {
-    final map = _declarations[type];
-    if (map == null) {
-      if (!_checkedMode) return false;
-      throw new MissingCodeException('declarations for $type');
-    }
-    final decl = map[name];
-    return decl != null && decl.isMethod && decl.isStatic;
-  }
-
-  Declaration getDeclaration(Type type, Symbol name) {
-    var decl = _findDeclaration(type, name);
-    if (decl == null) {
-      if (!_checkedMode) return null;
-      throw new MissingCodeException('declaration for $type.$name');
-    }
-    return decl;
-  }
-
-  List<Declaration> query(Type type, QueryOptions options) {
-    var result = [];
-    if (options.includeInherited) {
-      var superclass = _parents[type];
-      if (superclass == null) {
-        if (_checkedMode) {
-          throw new MissingCodeException('superclass of "$type"');
-        }
-      } else if (superclass != options.includeUpTo) {
-        result = query(superclass, options);
-      }
-    }
-    var map = _declarations[type];
-    if (map == null) {
-      if (!_checkedMode) return result;
-      throw new MissingCodeException('declarations for $type');
-    }
-    for (var decl in map.values) {
-      if (!options.includeFields && decl.isField) continue;
-      if (!options.includeProperties && decl.isProperty) continue;
-      if (options.excludeFinal && decl.isFinal) continue;
-      if (!options.includeMethods && decl.isMethod) continue;
-      if (options.matches != null && !options.matches(decl.name)) continue;
-      if (options.withAnnotations != null &&
-          !matchesAnnotation(decl.annotations, options.withAnnotations)) {
-        continue;
-      }
-      if (options.excludeOverriden) {
-        result.retainWhere((value) => decl.name != value.name);
-      }
-      result.add(decl);
-    }
-    return result;
-  }
-
-  Declaration _findDeclaration(Type type, Symbol name) {
-    while (type != Object) {
-      final declarations = _declarations[type];
-      if (declarations != null) {
-        final declaration = declarations[name];
-        if (declaration != null) return declaration;
-      }
-      var parentType = _parents[type];
-      if (parentType == null) {
-        if (!_checkedMode) return null;
-        throw new MissingCodeException('superclass of "$type"');
-      }
-      type = parentType;
-    }
-    return null;
-  }
-}
-
-/// Implements [SymbolConverterService] using a static configuration.
-class GeneratedSymbolConverterService implements SymbolConverterService {
-  final StaticConfiguration _configuration;
-  Map<Symbol, String> get _names => _configuration.names;
-  Map<String, Symbol> get _symbols => _configuration._symbols;
-
-  GeneratedSymbolConverterService(this._configuration);
-
-  String symbolToName(Symbol symbol) => _names[symbol];
-  Symbol nameToSymbol(String name) => _symbols[name];
-}
-
-/// Exception thrown when trynig to access something that should be there, but
-/// the code generator didn't include it.
-class MissingCodeException implements Exception {
-  final String description;
-  MissingCodeException(this.description);
-
-  String toString() => 'Missing $description. '
-      'Code generation for the smoke package seems incomplete.';
-}