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77 lines
3.2 KiB
Dart
77 lines
3.2 KiB
Dart
//
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// Copyright 2021 Sergey Penkovsky (sergey.penkovsky@gmail.com)
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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import 'package:analyzer/dart/element/element.dart';
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/// ---------------------------------------------------------------------------
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/// MetadataUtils -- utilities for analyzing method and parameter annotations.
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///
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/// ENGLISH
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/// Provides static utility methods to analyze Dart annotations on methods or
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/// parameters. For instance, helps to find if an element is annotated with
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/// `@named()`, `@singleton()`, or other meta-annotations used in this DI framework.
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///
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/// RUSSIAN
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/// Утилиты для разбора аннотаций методов и параметров.
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/// Позволяют находить наличие аннотаций, например, @named() и @singleton(),
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/// у методов и параметров. Используется для анализа исходного кода при генерации.
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/// ---------------------------------------------------------------------------
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class MetadataUtils {
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/// -------------------------------------------------------------------------
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/// anyMeta
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///
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/// ENGLISH
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/// Checks if any annotation in the list has a type name that contains
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/// [typeName] (case insensitive).
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///
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/// RUSSIAN
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/// Проверяет: есть ли среди аннотаций метка, имя которой содержит [typeName]
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/// (регистр не учитывается).
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/// -------------------------------------------------------------------------
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static bool anyMeta(List<ElementAnnotation> meta, String typeName) {
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return meta.any((m) =>
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m
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.computeConstantValue()
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?.type
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?.getDisplayString()
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.toLowerCase()
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.contains(typeName.toLowerCase()) ??
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false);
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}
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/// -------------------------------------------------------------------------
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/// getNamedValue
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///
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/// ENGLISH
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/// Retrieves the value from a `@named('value')` annotation if present.
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/// Returns the string value or null if not found.
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///
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/// RUSSIAN
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/// Находит значение из аннотации @named('значение').
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/// Возвращает строку значения, если аннотация присутствует; иначе null.
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/// -------------------------------------------------------------------------
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static String? getNamedValue(List<ElementAnnotation> meta) {
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for (final m in meta) {
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final cv = m.computeConstantValue();
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final typeStr = cv?.type?.getDisplayString().toLowerCase();
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if (typeStr?.contains('named') ?? false) {
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return cv?.getField('value')?.toStringValue();
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}
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}
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return null;
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}
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}
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