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Side by Side Diff: packages/quiver/lib/mirrors.dart

Issue 2989763002: Update charted to 0.4.8 and roll (Closed)
Patch Set: Removed Cutch from list of reviewers Created 3 years, 4 months ago
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1 // Copyright 2013 Google Inc. All Rights Reserved. 1 // Copyright 2013 Google Inc. All Rights Reserved.
2 // 2 //
3 // Licensed under the Apache License, Version 2.0 (the "License"); 3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License. 4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at 5 // You may obtain a copy of the License at
6 // 6 //
7 // http://www.apache.org/licenses/LICENSE-2.0 7 // http://www.apache.org/licenses/LICENSE-2.0
8 // 8 //
9 // Unless required by applicable law or agreed to in writing, software 9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS, 10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and 12 // See the License for the specific language governing permissions and
13 // limitations under the License. 13 // limitations under the License.
14 14
15 library quiver.mirrors; 15 library quiver.mirrors;
16 16
17 import 'dart:mirrors'; 17 import 'dart:mirrors';
18 18
19 /** 19 /// Returns the qualified name of [t].
20 * Returns the qualified name of [t].
21 */
22 Symbol getTypeName(Type t) => reflectClass(t).qualifiedName; 20 Symbol getTypeName(Type t) => reflectClass(t).qualifiedName;
23 21
24 /** 22 /// Returns true if [o] implements [type].
25 * Returns true if [o] implements [type].
26 */
27 bool implements(Object o, Type type) => 23 bool implements(Object o, Type type) =>
28 classImplements(reflect(o).type, reflectClass(type)); 24 classImplements(reflect(o).type, reflectClass(type));
29 25
30 /** 26 /// Returns true if the class represented by [classMirror] implements the class
31 * Returns true if the class represented by [classMirror] implements the class 27 /// represented by [interfaceMirror].
32 * represented by [interfaceMirror].
33 */
34 bool classImplements(ClassMirror classMirror, ClassMirror interfaceMirror) { 28 bool classImplements(ClassMirror classMirror, ClassMirror interfaceMirror) {
35 if (classMirror == null) return false; 29 if (classMirror == null) return false;
36 // TODO: change to comparing mirrors when dartbug.com/19781 is fixed 30 // TODO: change to comparing mirrors when dartbug.com/19781 is fixed
37 if (classMirror.qualifiedName == interfaceMirror.qualifiedName) return true; 31 if (classMirror.qualifiedName == interfaceMirror.qualifiedName) return true;
38 if (classImplements(classMirror.superclass, interfaceMirror)) return true; 32 if (classImplements(classMirror.superclass, interfaceMirror)) return true;
39 if (classMirror.superinterfaces 33 if (classMirror.superinterfaces
40 .any((i) => classImplements(i, interfaceMirror))) return true; 34 .any((i) => classImplements(i, interfaceMirror))) return true;
41 return false; 35 return false;
42 } 36 }
43 37
44 /** 38 /// Walks up the class hierarchy to find a method declaration with the given
45 * Walks up the class hierarchy to find a method declaration with the given 39 /// [name].
46 * [name]. 40 ///
47 * 41 /// Note that it's not possible to tell if there's an implementation via
48 * Note that it's not possible to tell if there's an implementation via 42 /// noSuchMethod().
49 * noSuchMethod().
50 */
51 DeclarationMirror getDeclaration(ClassMirror classMirror, Symbol name) { 43 DeclarationMirror getDeclaration(ClassMirror classMirror, Symbol name) {
52 if (classMirror.declarations.containsKey(name)) { 44 if (classMirror.declarations.containsKey(name)) {
53 return classMirror.declarations[name]; 45 return classMirror.declarations[name];
54 } 46 }
55 if (classMirror.superclass != null) { 47 if (classMirror.superclass != null) {
56 var mirror = getDeclaration(classMirror.superclass, name); 48 var mirror = getDeclaration(classMirror.superclass, name);
57 if (mirror != null) { 49 if (mirror != null) {
58 return mirror; 50 return mirror;
59 } 51 }
60 } 52 }
61 for (ClassMirror supe in classMirror.superinterfaces) { 53 for (ClassMirror supe in classMirror.superinterfaces) {
62 var mirror = getDeclaration(supe, name); 54 var mirror = getDeclaration(supe, name);
63 if (mirror != null) { 55 if (mirror != null) {
64 return mirror; 56 return mirror;
65 } 57 }
66 } 58 }
67 return null; 59 return null;
68 } 60 }
69 61
70 /** 62 /// Closurizes a method reflectively.
71 * Closurzes a method reflectively.
72 */
73 class Method /* implements Function */ { 63 class Method /* implements Function */ {
74 final InstanceMirror mirror; 64 final InstanceMirror mirror;
75 final Symbol symbol; 65 final Symbol symbol;
76 66
77 Method(this.mirror, this.symbol); 67 Method(this.mirror, this.symbol);
78 68
79 dynamic noSuchMethod(Invocation i) { 69 dynamic noSuchMethod(Invocation i) {
80 if (i.isMethod && i.memberName == const Symbol('call')) { 70 if (i.isMethod && i.memberName == const Symbol('call')) {
81 if (i.namedArguments != null && i.namedArguments.isNotEmpty) { 71 if (i.namedArguments != null && i.namedArguments.isNotEmpty) {
82 // this will fail until named argument support is implemented 72 // this will fail until named argument support is implemented
83 return mirror.invoke( 73 return mirror
84 symbol, i.positionalArguments, i.namedArguments).reflectee; 74 .invoke(symbol, i.positionalArguments, i.namedArguments)
75 .reflectee;
85 } 76 }
86 return mirror.invoke(symbol, i.positionalArguments).reflectee; 77 return mirror.invoke(symbol, i.positionalArguments).reflectee;
87 } 78 }
88 return super.noSuchMethod(i); 79 return super.noSuchMethod(i);
89 } 80 }
90 } 81 }
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