/**
 * Copyright 2018, OpenCensus Authors
 *
 * 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 { LabelKey , LabelValue } from '../metrics/export/types' ; param reference param errorMessage returns export function validateNotNull < T > ( reference , errorMessage ) { if ( reference === null || reference === undefined ) { throw new Error ( `Missing mandatory ${ errorMessage } parameter` ) ; } return reference ; } param list param errorMessage export function validateArrayElementsNotNull < T > ( array , errorMessage ) { const areAllDefined = array . every ( element => element !== null && typeof element !== 'undefined' ) ; if ( ! areAllDefined ) { throw new Error ( `${ errorMessage } elements should not be a NULL` ) ; } } /** Throws an error if any of the map elements is null. */ export function validateMapElementNotNull < K , V > ( map , errorMessage ) { for ( const [ key , value ] of map . entries ( ) ) { if ( key == null || value == null ) { throw new Error ( `${ errorMessage } elements should not be a NULL` ) ; } } } /** Throws an error if any of the array element present in the map. */ export function validateDuplicateKeys ( keys , constantLabels ) { const keysAndConstantKeys = new Set ( [ ... keys , ... constantLabels . keys ( ) ] . map ( k => k . key ) ) ; if ( keysAndConstantKeys . size !== keys . length + constantLabels . size ) { throw new Error ( `The keys from LabelKeys should not be present in constantLabels or LabelKeys should not contains duplicate keys` ) ; } }