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| 1 // Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file | |
| 2 // for details. All rights reserved. Use of this source code is governed by a | |
| 3 // BSD-style license that can be found in the LICENSE file. | |
| 4 | |
| 5 import 'dart:collection' show HashSet; | |
| 6 | |
| 7 import 'package:analyzer/dart/ast/ast.dart' show Identifier; | |
| 8 import 'package:analyzer/dart/element/element.dart'; | |
| 9 | |
| 10 class PropertyOverrideResult { | |
| 11 final bool foundGetter; | |
| 12 final bool foundSetter; | |
| 13 | |
| 14 PropertyOverrideResult(this.foundGetter, this.foundSetter); | |
| 15 } | |
| 16 | |
| 17 PropertyOverrideResult checkForPropertyOverride( | |
| 18 FieldElement field, List<ClassElement> superclasses) { | |
| 19 bool foundGetter = false; | |
| 20 bool foundSetter = false; | |
| 21 | |
| 22 for (var superclass in superclasses) { | |
| 23 var superprop = getProperty(superclass, field.library, field.name); | |
| 24 if (superprop == null) continue; | |
| 25 | |
| 26 var getter = superprop.getter; | |
| 27 bool hasGetter = getter != null && !getter.isAbstract; | |
| 28 if (hasGetter) foundGetter = true; | |
| 29 | |
| 30 var setter = superprop.setter; | |
| 31 bool hasSetter = setter != null && !setter.isAbstract; | |
| 32 if (hasSetter) foundSetter = true; | |
| 33 } | |
| 34 | |
| 35 return new PropertyOverrideResult(foundGetter, foundSetter); | |
| 36 } | |
| 37 | |
| 38 FieldElement getProperty( | |
| 39 ClassElement cls, LibraryElement fromLibrary, String name) { | |
| 40 // Properties from a different library are not accessible. | |
| 41 if (Identifier.isPrivateName(name) && cls.library != fromLibrary) { | |
| 42 return null; | |
| 43 } | |
| 44 for (var accessor in cls.accessors) { | |
| 45 var prop = accessor.variable; | |
| 46 if (prop.name == name) return prop; | |
| 47 } | |
| 48 return null; | |
| 49 } | |
| 50 | |
| 51 List<ClassElement> getSuperclasses(ClassElement cls) { | |
| 52 var result = <ClassElement>[]; | |
| 53 var visited = new HashSet<ClassElement>(); | |
| 54 while (cls != null && visited.add(cls)) { | |
| 55 for (var mixinType in cls.mixins.reversed) { | |
| 56 var mixin = mixinType.element; | |
| 57 if (mixin != null) result.add(mixin); | |
| 58 } | |
| 59 var supertype = cls.supertype; | |
| 60 if (supertype == null) break; | |
| 61 | |
| 62 cls = supertype.element; | |
| 63 result.add(cls); | |
| 64 } | |
| 65 return result; | |
| 66 } | |
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