@aws-cdk/core
Version:
AWS Cloud Development Kit Core Library
49 lines • 5.47 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.CfnUtils = exports.CfnUtilsProvider = void 0;
const construct_compat_1 = require("../construct-compat");
const custom_resource_1 = require("../custom-resource");
const custom_resource_provider_1 = require("../custom-resource-provider");
/**
* A custom resource provider for CFN utilities such as `CfnJson`.
*/
class CfnUtilsProvider extends construct_compat_1.Construct {
static getOrCreate(scope) {
return custom_resource_provider_1.CustomResourceProvider.getOrCreate(scope, 'AWSCDKCfnUtilsProvider', {
runtime: custom_resource_provider_1.CustomResourceProviderRuntime.NODEJS_14_X,
codeDirectory: `${__dirname}/cfn-utils-provider`,
});
}
}
exports.CfnUtilsProvider = CfnUtilsProvider;
/**
* Utility functions provided by the CfnUtilsProvider
*/
class CfnUtils {
/**
* Encode a structure to JSON at CloudFormation deployment time
*
* This would have been suitable for the JSON-encoding of abitrary structures, however:
*
* - It uses a custom resource to do the encoding, and we'd rather not use a custom
* resource if we can avoid it.
* - It cannot be used to encode objects where the keys of the objects can contain
* tokens--because those cannot be represented in the JSON encoding that CloudFormation
* templates use.
*
* This helper is used by `CloudFormationLang.toJSON()` if and only if it encounters
* objects that cannot be stringified any other way.
*/
static stringify(scope, id, value) {
const resource = new custom_resource_1.CustomResource(scope, id, {
serviceToken: CfnUtilsProvider.getOrCreate(scope),
resourceType: "Custom::AWSCDKCfnJsonStringify" /* CFN_JSON_STRINGIFY */,
properties: {
Value: value,
},
});
return resource.getAttString('Value');
}
}
exports.CfnUtils = CfnUtils;
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