All files / src/rx ConversionObserver.ts

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/**
 * Copyright 2017-2020 Plexus Interop Deutsche Bank AG
 * SPDX-License-Identifier: Apache-2.0
 *
 * 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.
 */
import { Observer } from './Observer';
 
export class ConversionObserver<S, D> implements Observer<D> {
 
    constructor(
        protected readonly source: Observer<S>, 
        protected readonly converter: (from: D) => S) {}
 
    public next(value: D): void {
        const after: S = this.converter(value);
        this.source.next(after);
    }
 
    public error(err: any): void {
        this.source.error(err);
    } 
 
    public complete(): void {
        this.source.complete();
    }
 
}