dipend/decorators/inject-mapped-dependency-decorator.js

This library implements a dependency injection (DI) system in JavaScript/TypeScript, making it easier to manage dependencies in modular applications.

/*
 * Copyright 2025 Saulo V. Alvarenga. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.InjectMappedDependency = InjectMappedDependency;
const helpers_1 = require("../helpers");
const mapped_dependency_1 = require("../mapped-dependency");
function InjectMappedDependency(constructorArgIndex, qualifierToken) {
    return (target, context) => {
        if (context.kind === "class") {
            context.addInitializer(function () {
                const dependencyToken = helpers_1.MetadataHelper.getSpecificConstructorParamsMetadata(target, constructorArgIndex);
                if (dependencyToken === undefined) {
                    throw new Error("Invalid constructor argument index.");
                }
                helpers_1.MetadataHelper.setSpecificConstructorParamsMetadata(target, constructorArgIndex, new mapped_dependency_1.MappedDependency(dependencyToken, qualifierToken));
                Object.assign(context.metadata, helpers_1.MetadataHelper.getAllClassMetadata(target));
            });
            return;
        }
        throw new Error("Inject just work with classes.");
    };
}