adaptive-expressions
Version:
Common Expression Language
51 lines • 1.79 kB
JavaScript
;
/**
* @module adaptive-expressions
*/
/**
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.AddProperty = void 0;
const expressionEvaluator_1 = require("../expressionEvaluator");
const expressionType_1 = require("../expressionType");
const functionUtils_1 = require("../functionUtils");
const returnType_1 = require("../returnType");
/**
* Add a property and its value, or name-value pair, to a JSON object, and return the updated object.
* If the object already exists at runtime the function throws an error.
*/
class AddProperty extends expressionEvaluator_1.ExpressionEvaluator {
/**
* Initializes a new instance of the [AddProperty](xref:adaptive-expressions.AddProperty) class.
*/
constructor() {
super(expressionType_1.ExpressionType.AddProperty, AddProperty.evaluator(), returnType_1.ReturnType.Object, AddProperty.validator);
}
/**
* @private
*/
static evaluator() {
return functionUtils_1.FunctionUtils.applyWithError((args) => {
let error;
const temp = args[0];
const prop = String(args[1]);
if (prop in temp) {
error = `${prop} already exists`;
}
else {
temp[String(args[1])] = args[2];
}
return { value: temp, error };
});
}
/**
* @private
*/
static validator(expression) {
functionUtils_1.FunctionUtils.validateOrder(expression, undefined, returnType_1.ReturnType.Object, returnType_1.ReturnType.String, returnType_1.ReturnType.Object);
}
}
exports.AddProperty = AddProperty;
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