532 lines
56 KiB
JavaScript
532 lines
56 KiB
JavaScript
"use strict";
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var _a, _b, _c;
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.RootConstruct = exports.ConstructOrder = exports.Construct = exports.Node = void 0;
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const JSII_RTTI_SYMBOL_1 = Symbol.for("jsii.rtti");
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const dependency_1 = require("./dependency");
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const stack_trace_1 = require("./private/stack-trace");
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const uniqueid_1 = require("./private/uniqueid");
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const CONSTRUCT_SYM = Symbol.for('constructs.Construct');
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/**
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* Represents the construct node in the scope tree.
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*/
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class Node {
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/**
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* Returns the node associated with a construct.
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* @param construct the construct
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*
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* @deprecated use `construct.node` instead
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*/
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static of(construct) {
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return construct.node;
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}
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constructor(host, scope, id) {
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this.host = host;
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this._locked = false; // if this is "true", addChild will fail
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id = id ?? ''; // if undefined, convert to empty string
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this.id = sanitizeId(id);
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this.scope = scope;
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if (scope && !this.id) {
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throw new Error('Only root constructs may have an empty ID');
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}
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// add to parent scope
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scope?.node.addChild(host, this.id);
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}
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/**
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* The full, absolute path of this construct in the tree.
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*
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* Components are separated by '/'.
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*/
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get path() {
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const components = [];
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for (const scope of this.scopes) {
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if (scope.node.id) {
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components.push(scope.node.id);
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}
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}
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return components.join(Node.PATH_SEP);
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}
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/**
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* Returns an opaque tree-unique address for this construct.
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*
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* Addresses are 42 characters hexadecimal strings. They begin with "c8"
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* followed by 40 lowercase hexadecimal characters (0-9a-f).
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*
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* Addresses are calculated using a SHA-1 of the components of the construct
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* path.
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*
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* To enable refactoring of construct trees, constructs with the ID `Default`
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* will be excluded from the calculation. In those cases constructs in the
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* same tree may have the same address.
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*
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* @example c83a2846e506bcc5f10682b564084bca2d275709ee
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*/
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get addr() {
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if (!this._addr) {
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this._addr = (0, uniqueid_1.addressOf)(this.scopes.map(c => c.node.id));
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}
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return this._addr;
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}
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/**
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* Return a direct child by id, or undefined
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*
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* @param id Identifier of direct child
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* @returns the child if found, or undefined
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*/
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tryFindChild(id) {
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return this._children?.[sanitizeId(id)];
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}
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/**
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* Return a direct child by id
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*
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* Throws an error if the child is not found.
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*
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* @param id Identifier of direct child
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* @returns Child with the given id.
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*/
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findChild(id) {
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const ret = this.tryFindChild(id);
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if (!ret) {
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throw new Error(`No child with id: '${id}'`);
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}
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return ret;
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}
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/**
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* Returns the child construct that has the id `Default` or `Resource`.
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* This is usually the construct that provides the bulk of the underlying functionality.
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* Useful for modifications of the underlying construct that are not available at the higher levels.
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*
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* @throws if there is more than one child
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* @returns a construct or undefined if there is no default child
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*/
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get defaultChild() {
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if (this._defaultChild !== undefined) {
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return this._defaultChild;
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}
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const resourceChild = this.tryFindChild('Resource');
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const defaultChild = this.tryFindChild('Default');
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if (resourceChild && defaultChild) {
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throw new Error(`Cannot determine default child for ${this.path}. There is both a child with id "Resource" and id "Default"`);
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}
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return defaultChild || resourceChild;
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}
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/**
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* Override the defaultChild property.
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*
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* This should only be used in the cases where the correct
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* default child is not named 'Resource' or 'Default' as it
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* should be.
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*
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* If you set this to undefined, the default behavior of finding
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* the child named 'Resource' or 'Default' will be used.
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*/
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set defaultChild(value) {
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this._defaultChild = value;
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}
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/**
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* All direct children of this construct.
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*/
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get children() {
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return Object.values(this._children ?? {});
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}
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/**
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* Return this construct and all of its children in the given order
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*/
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findAll(order = ConstructOrder.PREORDER) {
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const ret = new Array();
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visit(this.host);
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return ret;
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function visit(c) {
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if (order === ConstructOrder.PREORDER) {
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ret.push(c);
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}
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for (const child of c.node.children) {
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visit(child);
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}
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if (order === ConstructOrder.POSTORDER) {
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ret.push(c);
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}
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}
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}
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/**
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* This can be used to set contextual values.
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* Context must be set before any children are added, since children may consult context info during construction.
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* If the key already exists, it will be overridden.
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* @param key The context key
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* @param value The context value
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*/
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setContext(key, value) {
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if (this.children.length > 0) {
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const names = this.children.map(c => c.node.id);
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throw new Error('Cannot set context after children have been added: ' + names.join(','));
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}
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if (!this._context) {
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this._context = {};
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}
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this._context[key] = value;
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}
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/**
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* Retrieves a value from tree context if present. Otherwise, would throw an error.
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*
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* Context is usually initialized at the root, but can be overridden at any point in the tree.
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*
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* @param key The context key
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* @returns The context value or throws error if there is no context value for this key
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*/
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getContext(key) {
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const value = this._context?.[key];
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if (value !== undefined) {
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return value;
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}
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if (value === undefined && !this.scope?.node) {
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throw new Error(`No context value present for ${key} key`);
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}
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return this.scope && this.scope.node.getContext(key);
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}
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/**
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* Retrieves the all context of a node from tree context.
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*
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* Context is usually initialized at the root, but can be overridden at any point in the tree.
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*
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* @param defaults Any keys to override the retrieved context
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* @returns The context object or an empty object if there is discovered context
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*/
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getAllContext(defaults) {
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return this.scopes.reverse()
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.reduce((a, s) => ({ ...(s.node._context), ...a }), { ...defaults });
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}
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/**
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* Retrieves a value from tree context.
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*
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* Context is usually initialized at the root, but can be overridden at any point in the tree.
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*
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* @param key The context key
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* @returns The context value or `undefined` if there is no context value for this key.
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*/
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tryGetContext(key) {
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const value = this._context?.[key];
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if (value !== undefined) {
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return value;
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}
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return this.scope && this.scope.node.tryGetContext(key);
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}
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/**
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* An immutable array of metadata objects associated with this construct.
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* This can be used, for example, to implement support for deprecation notices, source mapping, etc.
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*/
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get metadata() {
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return [...this._metadata ?? []];
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}
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/**
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* Adds a metadata entry to this construct.
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* Entries are arbitrary values and will also include a stack trace to allow tracing back to
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* the code location for when the entry was added. It can be used, for example, to include source
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* mapping in CloudFormation templates to improve diagnostics.
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* Note that construct metadata is not the same as CloudFormation resource metadata and is never written to the CloudFormation template.
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* The metadata entries are written to the Cloud Assembly Manifest if the `treeMetadata` property is specified in the props of the App that contains this Construct.
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*
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* @param type a string denoting the type of metadata
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* @param data the value of the metadata (can be a Token). If null/undefined, metadata will not be added.
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* @param options options
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*/
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addMetadata(type, data, options = {}) {
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if (data == null) {
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return;
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}
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const node = this;
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function getTrace() {
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if (options.stackTraceOverride && options.stackTraceOverride.length > 0) {
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return options.stackTraceOverride;
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}
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const shouldTrace = options.stackTrace ?? false;
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return shouldTrace ? (0, stack_trace_1.captureStackTrace)(options.traceFromFunction ?? node.addMetadata) : undefined;
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}
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if (!this._metadata) {
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this._metadata = [];
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}
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this._metadata.push({ type, data, trace: getTrace() });
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}
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/**
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* All parent scopes of this construct.
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*
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* @returns a list of parent scopes. The last element in the list will always
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* be the current construct and the first element will be the root of the
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* tree.
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*/
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get scopes() {
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const ret = new Array();
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let curr = this.host;
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while (curr) {
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ret.unshift(curr);
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curr = curr.node.scope;
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}
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return ret;
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}
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/**
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* Returns the root of the construct tree.
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* @returns The root of the construct tree.
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*/
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get root() {
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return this.scopes[0];
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}
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/**
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* Returns true if this construct or the scopes in which it is defined are
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* locked.
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*/
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get locked() {
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if (this._locked) {
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return true;
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}
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if (this.scope && this.scope.node.locked) {
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return true;
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}
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return false;
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}
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/**
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* Add an ordering dependency on another construct.
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*
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* An `IDependable`
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*/
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addDependency(...deps) {
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if (!this._dependencies) {
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this._dependencies = new Set();
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}
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for (const d of deps) {
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this._dependencies.add(d);
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}
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}
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/**
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* Return all dependencies registered on this node (non-recursive).
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*/
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get dependencies() {
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const result = new Array();
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if (this._dependencies) {
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for (const dep of this._dependencies) {
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for (const root of dependency_1.Dependable.of(dep).dependencyRoots) {
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result.push(root);
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}
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}
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}
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return result;
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}
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/**
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* Remove the child with the given name, if present.
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*
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* @returns Whether a child with the given name was deleted.
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*/
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tryRemoveChild(childName) {
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if (!this._children || !(childName in this._children)) {
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return false;
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}
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delete this._children[childName];
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return true;
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}
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/**
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* Adds a validation to this construct.
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*
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* When `node.validate()` is called, the `validate()` method will be called on
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* all validations and all errors will be returned.
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*
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* @param validation The validation object
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*/
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addValidation(validation) {
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if (!this._validations) {
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this._validations = [];
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}
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this._validations.push(validation);
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}
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/**
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* Validates this construct.
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*
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* Invokes the `validate()` method on all validations added through
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* `addValidation()`.
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*
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* @returns an array of validation error messages associated with this
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* construct.
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*/
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validate() {
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return (this._validations ?? []).flatMap(v => v.validate());
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}
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/**
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* Locks this construct from allowing more children to be added. After this
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* call, no more children can be added to this construct or to any children.
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*/
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lock() {
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this._locked = true;
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}
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/**
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* Applies one or more mixins to this construct.
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*
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* Mixins are applied in order. The list of constructs is captured at the
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* start of the call, so constructs added by a mixin will not be visited.
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* Use multiple `with()` calls if subsequent mixins should apply to added
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* constructs.
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*
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* @param mixins The mixins to apply
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* @returns This construct for chaining
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*/
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with(...mixins) {
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const allConstructs = this.findAll();
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for (const mixin of mixins) {
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for (const construct of allConstructs) {
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if (mixin.supports(construct)) {
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mixin.applyTo(construct);
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}
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}
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}
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return this.host;
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}
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;
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/**
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* Adds a child construct to this node.
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*
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* @param child The child construct
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* @param childName The type name of the child construct.
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* @returns The resolved path part name of the child
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*/
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addChild(child, childName) {
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if (this.locked) {
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// special error if root is locked
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if (!this.path) {
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throw new Error('Cannot add children during synthesis');
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}
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throw new Error(`Cannot add children to "${this.path}" during synthesis`);
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}
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if (!this._children) {
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this._children = {};
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}
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if (this._children[childName]) {
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const name = this.id ?? '';
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const typeName = this.host.constructor.name;
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throw new Error(`There is already a Construct with name '${childName}' in ${typeName}${name.length > 0 ? ' [' + name + ']' : ''}`);
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}
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this._children[childName] = child;
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}
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}
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exports.Node = Node;
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_a = JSII_RTTI_SYMBOL_1;
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Node[_a] = { fqn: "constructs.Node", version: "10.6.0" };
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/**
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* Separator used to delimit construct path components.
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*/
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Node.PATH_SEP = '/';
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/**
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* Represents the building block of the construct graph.
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*
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* All constructs besides the root construct must be created within the scope of
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* another construct.
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*/
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class Construct {
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/**
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* Checks if `x` is a construct.
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*
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* Use this method instead of `instanceof` to properly detect `Construct`
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* instances, even when the construct library is symlinked.
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*
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* Explanation: in JavaScript, multiple copies of the `constructs` library on
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* disk are seen as independent, completely different libraries. As a
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* consequence, the class `Construct` in each copy of the `constructs` library
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* is seen as a different class, and an instance of one class will not test as
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* `instanceof` the other class. `npm install` will not create installations
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* like this, but users may manually symlink construct libraries together or
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* use a monorepo tool: in those cases, multiple copies of the `constructs`
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* library can be accidentally installed, and `instanceof` will behave
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* unpredictably. It is safest to avoid using `instanceof`, and using
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* this type-testing method instead.
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*
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* @returns true if `x` is an object created from a class which extends `Construct`.
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* @param x Any object
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*/
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static isConstruct(x) {
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return x && typeof x === 'object' && x[CONSTRUCT_SYM];
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}
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/**
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* Creates a new construct node.
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*
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* @param scope The scope in which to define this construct
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* @param id The scoped construct ID. Must be unique amongst siblings. If
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* the ID includes a path separator (`/`), then it will be replaced by double
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* dash `--`.
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*/
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constructor(scope, id) {
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this.node = new Node(this, scope, id);
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// implement IDependable privately
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dependency_1.Dependable.implement(this, {
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dependencyRoots: [this],
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});
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}
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/**
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* Applies one or more mixins to this construct.
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*
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* Mixins are applied in order. The list of constructs is captured at the
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* start of the call, so constructs added by a mixin will not be visited.
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* Use multiple `with()` calls if subsequent mixins should apply to added
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* constructs.
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*
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* @param mixins The mixins to apply
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* @returns This construct for chaining
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*/
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with(...mixins) {
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return this.node.with(...mixins);
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}
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;
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/**
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* Returns a string representation of this construct.
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*/
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toString() {
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return this.node.path || '<root>';
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}
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}
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exports.Construct = Construct;
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_b = JSII_RTTI_SYMBOL_1;
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Construct[_b] = { fqn: "constructs.Construct", version: "10.6.0" };
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/**
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* In what order to return constructs
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*/
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var ConstructOrder;
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(function (ConstructOrder) {
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/**
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* Depth-first, pre-order
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*/
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ConstructOrder[ConstructOrder["PREORDER"] = 0] = "PREORDER";
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/**
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* Depth-first, post-order (leaf nodes first)
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*/
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ConstructOrder[ConstructOrder["POSTORDER"] = 1] = "POSTORDER";
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})(ConstructOrder || (exports.ConstructOrder = ConstructOrder = {}));
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const PATH_SEP_REGEX = new RegExp(`${Node.PATH_SEP}`, 'g');
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/**
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* Return a sanitized version of an arbitrary string, so it can be used as an ID
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*/
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function sanitizeId(id) {
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// Escape path seps as double dashes
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return id.replace(PATH_SEP_REGEX, '--');
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}
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// Mark all instances of 'Construct'
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Object.defineProperty(Construct.prototype, CONSTRUCT_SYM, {
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value: true,
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enumerable: false,
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writable: false,
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});
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/**
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* Creates a new root construct node.
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*
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* The root construct represents the top of the construct tree and is not contained within a parent scope itself.
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* For root constructs, the id is optional.
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*/
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class RootConstruct extends Construct {
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/**
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* Creates a new root construct node.
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*
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* @param id The scoped construct ID. Must be unique amongst siblings. If
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* the ID includes a path separator (`/`), then it will be replaced by double
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* dash `--`.
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*/
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constructor(id) {
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super(undefined, id ?? '');
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}
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}
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exports.RootConstruct = RootConstruct;
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_c = JSII_RTTI_SYMBOL_1;
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RootConstruct[_c] = { fqn: "constructs.RootConstruct", version: "10.6.0" };
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//# 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type { IDependable } from './dependency';\nimport { Dependable } from './dependency';\nimport type { MetadataEntry } from './metadata';\nimport type { IMixin } from './mixin';\nimport { captureStackTrace } from './private/stack-trace';\nimport { addressOf } from './private/uniqueid';\n\nconst CONSTRUCT_SYM = Symbol.for('constructs.Construct');\n\n/**\n * Represents a construct.\n */\nexport interface IConstruct extends IDependable {\n  /**\n   * The tree node.\n   */\n  readonly node: Node;\n\n  /**\n   * Applies one or more mixins to this construct.\n   *\n   * Mixins are applied in order. The list of constructs is captured at the\n   * start of the call, so constructs added by a mixin will not be visited.\n   *\n   * @param mixins The mixins to apply\n   * @returns This construct for chaining\n   */\n  with(...mixins: IMixin[]): IConstruct;\n}\n\n/**\n * Represents the construct node in the scope tree.\n */\nexport class Node {\n  /**\n   * Separator used to delimit construct path components.\n   */\n  public static readonly PATH_SEP = '/';\n\n  /**\n   * Returns the node associated with a construct.\n   * @param construct the construct\n   *\n   * @deprecated use `construct.node` instead\n   */\n  public static of(construct: IConstruct): Node {\n    return construct.node;\n  }\n\n  /**\n   * Returns the scope in which this construct is defined.\n   *\n   * The value is `undefined` at the root of the construct scope tree.\n   */\n  public readonly scope?: IConstruct;\n\n  /**\n   * The id of this construct within the current scope.\n   *\n   * This is a scope-unique id. To obtain an app-unique id for this construct, use `addr`.\n   */\n  public readonly id: string;\n\n  private _locked = false; // if this is \"true\", addChild will fail\n  private _children: { [id: string]: IConstruct } | undefined;\n  private _context: { [key: string]: any } | undefined;\n  private _metadata: Array<MetadataEntry> | undefined;\n  private _dependencies: Set<IDependable> | undefined;\n  private _defaultChild: IConstruct | undefined;\n  private _validations: Array<IValidation> | undefined;\n  private _addr?: string; // cache\n\n  public constructor(private readonly host: Construct, scope: IConstruct, id: string) {\n    id = id ?? ''; // if undefined, convert to empty string\n\n    this.id = sanitizeId(id);\n    this.scope = scope;\n\n    if (scope && !this.id) {\n      throw new Error('Only root constructs may have an empty ID');\n    }\n\n    // add to parent scope\n    scope?.node.addChild(host, this.id);\n  }\n\n  /**\n   * The full, absolute path of this construct in the tree.\n   *\n   * Components are separated by '/'.\n   */\n  public get path(): string {\n    const components = [];\n    for (const scope of this.scopes) {\n      if (scope.node.id) {\n        components.push(scope.node.id);\n      }\n    }\n    return components.join(Node.PATH_SEP);\n  }\n\n  /**\n   * Returns an opaque tree-unique address for this construct.\n   *\n   * Addresses are 42 characters hexadecimal strings. They begin with \"c8\"\n   * followed by 40 lowercase hexadecimal characters (0-9a-f).\n   *\n   * Addresses are calculated using a SHA-1 of the components of the construct\n   * path.\n   *\n   * To enable refactoring of construct trees, constructs with the ID `Default`\n   * will be excluded from the calculation. In those cases constructs in the\n   * same tree may have the same address.\n   *\n   * @example c83a2846e506bcc5f10682b564084bca2d275709ee\n   */\n  public get addr(): string {\n    if (!this._addr) {\n      this._addr = addressOf(this.scopes.map(c => c.node.id));\n    }\n\n    return this._addr;\n  }\n\n  /**\n   * Return a direct child by id, or undefined\n   *\n   * @param id Identifier of direct child\n   * @returns the child if found, or undefined\n   */\n  public tryFindChild(id: string): IConstruct | undefined {\n    return this._children?.[sanitizeId(id)];\n  }\n\n  /**\n   * Return a direct child by id\n   *\n   * Throws an error if the child is not found.\n   *\n   * @param id Identifier of direct child\n   * @returns Child with the given id.\n   */\n  public findChild(id: string): IConstruct {\n    const ret = this.tryFindChild(id);\n    if (!ret) {\n      throw new Error(`No child with id: '${id}'`);\n    }\n    return ret;\n  }\n\n  /**\n   * Returns the child construct that has the id `Default` or `Resource`.\n   * This is usually the construct that provides the bulk of the underlying functionality.\n   * Useful for modifications of the underlying construct that are not available at the higher levels.\n   *\n   * @throws if there is more than one child\n   * @returns a construct or undefined if there is no default child\n   */\n  public get defaultChild(): IConstruct | undefined {\n    if (this._defaultChild !== undefined) {\n      return this._defaultChild;\n    }\n\n    const resourceChild = this.tryFindChild('Resource');\n    const defaultChild = this.tryFindChild('Default');\n    if (resourceChild && defaultChild) {\n      throw new Error(`Cannot determine default child for ${this.path}. There is both a child with id \"Resource\" and id \"Default\"`);\n    }\n\n    return defaultChild || resourceChild;\n  }\n\n  /**\n   * Override the defaultChild property.\n   *\n   * This should only be used in the cases where the correct\n   * default child is not named 'Resource' or 'Default' as it\n   * should be.\n   *\n   * If you set this to undefined, the default behavior of finding\n   * the child named 'Resource' or 'Default' will be used.\n   */\n  public set defaultChild(value: IConstruct | undefined) {\n    this._defaultChild = value;\n  }\n\n  /**\n   * All direct children of this construct.\n   */\n  public get children() {\n    return Object.values(this._children ?? {});\n  }\n\n  /**\n   * Return this construct and all of its children in the given order\n   */\n  public findAll(order: ConstructOrder = ConstructOrder.PREORDER): IConstruct[] {\n    const ret = new Array<IConstruct>();\n    visit(this.host);\n    return ret;\n\n    function visit(c: IConstruct) {\n      if (order === ConstructOrder.PREORDER) {\n        ret.push(c);\n      }\n\n      for (const child of c.node.children) {\n        visit(child);\n      }\n\n      if (order === ConstructOrder.POSTORDER) {\n        ret.push(c);\n      }\n    }\n  }\n\n  /**\n   * This can be used to set contextual values.\n   * Context must be set before any children are added, since children may consult context info during construction.\n   * If the key already exists, it will be overridden.\n   * @param key The context key\n   * @param value The context value\n   */\n  public setContext(key: string, value: any) {\n    if (this.children.length > 0) {\n      const names = this.children.map(c => c.node.id);\n      throw new Error('Cannot set context after children have been added: ' + names.join(','));\n    }\n    if (!this._context) {\n      this._context = {};\n    }\n    this._context[key] = value;\n  }\n\n  /**\n   * Retrieves a value from tree context if present. Otherwise, would throw an error.\n   *\n   * Context is usually initialized at the root, but can be overridden at any point in the tree.\n   *\n   * @param key The context key\n   * @returns The context value or throws error if there is no context value for this key\n   */\n  public getContext(key: string): any {\n    const value = this._context?.[key];\n\n    if (value !== undefined) { return value; }\n\n    if (value === undefined && !this.scope?.node) {\n      throw new Error(`No context value present for ${key} key`);\n    }\n\n    return this.scope && this.scope.node.getContext(key);\n  }\n\n  /**\n   * Retrieves the all context of a node from tree context.\n   *\n   * Context is usually initialized at the root, but can be overridden at any point in the tree.\n   *\n   * @param defaults Any keys to override the retrieved context\n   * @returns The context object or an empty object if there is discovered context\n   */\n  public getAllContext(defaults?: object): any {\n    return this.scopes.reverse()\n      .reduce((a, s) => ({ ...(s.node._context), ...a }), { ...defaults });\n  }\n\n  /**\n   * Retrieves a value from tree context.\n   *\n   * Context is usually initialized at the root, but can be overridden at any point in the tree.\n   *\n   * @param key The context key\n   * @returns The context value or `undefined` if there is no context value for this key.\n   */\n  public tryGetContext(key: string): any {\n    const value = this._context?.[key];\n    if (value !== undefined) { return value; }\n\n    return this.scope && this.scope.node.tryGetContext(key);\n  }\n\n  /**\n   * An immutable array of metadata objects associated with this construct.\n   * This can be used, for example, to implement support for deprecation notices, source mapping, etc.\n   */\n  public get metadata() {\n    return [...this._metadata ?? []];\n  }\n\n  /**\n   * Adds a metadata entry to this construct.\n   * Entries are arbitrary values and will also include a stack trace to allow tracing back to\n   * the code location for when the entry was added. It can be used, for example, to include source\n   * mapping in CloudFormation templates to improve diagnostics.\n   * Note that construct metadata is not the same as CloudFormation resource metadata and is never written to the CloudFormation template.\n   * The metadata entries are written to the Cloud Assembly Manifest if the `treeMetadata` property is specified in the props of the App that contains this Construct.\n   *\n   * @param type a string denoting the type of metadata\n   * @param data the value of the metadata (can be a Token). If null/undefined, metadata will not be added.\n   * @param options options\n   */\n  public addMetadata(type: string, data: any, options: MetadataOptions = { }): void {\n    if (data == null) {\n      return;\n    }\n\n    const node = this;\n    function getTrace() {\n      if (options.stackTraceOverride && options.stackTraceOverride.length > 0) {\n        return options.stackTraceOverride;\n      }\n      const shouldTrace = options.stackTrace ?? false;\n      return shouldTrace ? captureStackTrace(options.traceFromFunction ?? node.addMetadata) : undefined;\n    }\n\n    if (!this._metadata) {\n      this._metadata = [];\n    }\n    this._metadata.push({ type, data, trace: getTrace() });\n  }\n\n  /**\n   * All parent scopes of this construct.\n   *\n   * @returns a list of parent scopes. The last element in the list will always\n   * be the current construct and the first element will be the root of the\n   * tree.\n   */\n  public get scopes(): IConstruct[] {\n    const ret = new Array<IConstruct>();\n\n    let curr: IConstruct | undefined = this.host;\n    while (curr) {\n      ret.unshift(curr);\n      curr = curr.node.scope;\n    }\n\n    return ret;\n  }\n\n  /**\n   * Returns the root of the construct tree.\n   * @returns The root of the construct tree.\n   */\n  public get root() {\n    return this.scopes[0];\n  }\n\n  /**\n   * Returns true if this construct or the scopes in which it is defined are\n   * locked.\n   */\n  public get locked() {\n    if (this._locked) {\n      return true;\n    }\n\n    if (this.scope && this.scope.node.locked) {\n      return true;\n    }\n\n    return false;\n  }\n\n  /**\n   * Add an ordering dependency on another construct.\n   *\n   * An `IDependable`\n   */\n  public addDependency(...deps: IDependable[]) {\n    if (!this._dependencies) {\n      this._dependencies = new Set();\n    }\n    for (const d of deps) {\n      this._dependencies.add(d);\n    }\n  }\n\n  /**\n   * Return all dependencies registered on this node (non-recursive).\n   */\n  public get dependencies(): IConstruct[] {\n    const result = new Array<IConstruct>();\n    if (this._dependencies) {\n      for (const dep of this._dependencies) {\n        for (const root of Dependable.of(dep).dependencyRoots) {\n          result.push(root);\n        }\n      }\n    }\n    return result;\n  }\n\n  /**\n   * Remove the child with the given name, if present.\n   *\n   * @returns Whether a child with the given name was deleted.\n   */\n  public tryRemoveChild(childName: string): boolean {\n    if (!this._children || !(childName in this._children)) { return false; }\n    delete this._children[childName];\n    return true;\n  }\n\n  /**\n   * Adds a validation to this construct.\n   *\n   * When `node.validate()` is called, the `validate()` method will be called on\n   * all validations and all errors will be returned.\n   *\n   * @param validation The validation object\n   */\n  public addValidation(validation: IValidation) {\n    if (!this._validations) {\n      this._validations = [];\n    }\n    this._validations.push(validation);\n  }\n\n  /**\n   * Validates this construct.\n   *\n   * Invokes the `validate()` method on all validations added through\n   * `addValidation()`.\n   *\n   * @returns an array of validation error messages associated with this\n   * construct.\n   */\n  public validate(): string[] {\n    return (this._validations ?? []).flatMap(v => v.validate());\n  }\n\n  /**\n   * Locks this construct from allowing more children to be added. After this\n   * call, no more children can be added to this construct or to any children.\n   */\n  public lock() {\n    this._locked = true;\n  }\n\n  /**\n   * Applies one or more mixins to this construct.\n   *\n   * Mixins are applied in order. The list of constructs is captured at the\n   * start of the call, so constructs added by a mixin will not be visited.\n   * Use multiple `with()` calls if subsequent mixins should apply to added\n   * constructs.\n   *\n   * @param mixins The mixins to apply\n   * @returns This construct for chaining\n   */\n  public with(...mixins: IMixin[]): IConstruct {\n    const allConstructs = this.findAll();\n    for (const mixin of mixins) {\n      for (const construct of allConstructs) {\n        if (mixin.supports(construct)) {\n          mixin.applyTo(construct);\n        }\n      }\n    }\n    return this.host;\n  };\n\n  /**\n   * Adds a child construct to this node.\n   *\n   * @param child The child construct\n   * @param childName The type name of the child construct.\n   * @returns The resolved path part name of the child\n   */\n  private addChild(child: Construct, childName: string) {\n    if (this.locked) {\n\n      // special error if root is locked\n      if (!this.path) {\n        throw new Error('Cannot add children during synthesis');\n      }\n\n      throw new Error(`Cannot add children to \"${this.path}\" during synthesis`);\n    }\n\n    if (!this._children) {\n      this._children = {};\n    }\n\n    if (this._children[childName]) {\n      const name = this.id ?? '';\n      const typeName = this.host.constructor.name;\n      throw new Error(`There is already a Construct with name '${childName}' in ${typeName}${name.length > 0 ? ' [' + name + ']' : ''}`);\n    }\n\n    this._children[childName] = child;\n  }\n}\n\n/**\n * Represents the building block of the construct graph.\n *\n * All constructs besides the root construct must be created within the scope of\n * another construct.\n */\nexport class Construct implements IConstruct {\n  /**\n   * Checks if `x` is a construct.\n   *\n   * Use this method instead of `instanceof` to properly detect `Construct`\n   * instances, even when the construct library is symlinked.\n   *\n   * Explanation: in JavaScript, multiple copies of the `constructs` library on\n   * disk are seen as independent, completely different libraries. As a\n   * consequence, the class `Construct` in each copy of the `constructs` library\n   * is seen as a different class, and an instance of one class will not test as\n   * `instanceof` the other class. `npm install` will not create installations\n   * like this, but users may manually symlink construct libraries together or\n   * use a monorepo tool: in those cases, multiple copies of the `constructs`\n   * library can be accidentally installed, and `instanceof` will behave\n   * unpredictably. It is safest to avoid using `instanceof`, and using\n   * this type-testing method instead.\n   *\n   * @returns true if `x` is an object created from a class which extends `Construct`.\n   * @param x Any object\n   */\n  public static isConstruct(x: any): x is Construct {\n    return x && typeof x === 'object' && x[CONSTRUCT_SYM];\n  }\n\n  /**\n   * The tree node.\n   */\n  public readonly node: Node;\n\n  /**\n   * Creates a new construct node.\n   *\n   * @param scope The scope in which to define this construct\n   * @param id The scoped construct ID. Must be unique amongst siblings. If\n   * the ID includes a path separator (`/`), then it will be replaced by double\n   * dash `--`.\n   */\n  constructor(scope: Construct, id: string) {\n    this.node = new Node(this, scope, id);\n\n    // implement IDependable privately\n    Dependable.implement(this, {\n      dependencyRoots: [this],\n    });\n  }\n\n  /**\n   * Applies one or more mixins to this construct.\n   *\n   * Mixins are applied in order. The list of constructs is captured at the\n   * start of the call, so constructs added by a mixin will not be visited.\n   * Use multiple `with()` calls if subsequent mixins should apply to added\n   * constructs.\n   *\n   * @param mixins The mixins to apply\n   * @returns This construct for chaining\n   */\n  public with(...mixins: IMixin[]): IConstruct {\n    return this.node.with(...mixins);\n  };\n\n  /**\n   * Returns a string representation of this construct.\n   */\n  public toString() {\n    return this.node.path || '<root>';\n  }\n}\n\n/**\n * Implement this interface in order for the construct to be able to validate itself.\n */\nexport interface IValidation {\n  /**\n   * Validate the current construct.\n   *\n   * This method can be implemented by derived constructs in order to perform\n   * validation logic. It is called on all constructs before synthesis.\n   *\n   * @returns An array of validation error messages, or an empty array if there the construct is valid.\n   */\n  validate(): string[];\n}\n\n/**\n * In what order to return constructs\n */\nexport enum ConstructOrder {\n  /**\n   * Depth-first, pre-order\n   */\n  PREORDER,\n\n  /**\n   * Depth-first, post-order (leaf nodes first)\n   */\n  POSTORDER,\n}\n\nconst PATH_SEP_REGEX = new RegExp(`${Node.PATH_SEP}`, 'g');\n\n/**\n * Return a sanitized version of an arbitrary string, so it can be used as an ID\n */\nfunction sanitizeId(id: string) {\n  // Escape path seps as double dashes\n  return id.replace(PATH_SEP_REGEX, '--');\n}\n\n/**\n * Options for `construct.addMetadata()`.\n */\nexport interface MetadataOptions {\n  /**\n   * Include stack trace with metadata entry.\n   * @default false\n   */\n  readonly stackTrace?: boolean;\n\n  /**\n   * A JavaScript function to begin tracing from.\n   *\n   * This option is ignored unless `stackTrace` is `true`.\n   *\n   * @default addMetadata()\n   */\n  readonly traceFromFunction?: any;\n\n  /**\n   * The actual stack trace to be added to the metadata. If this\n   * parameter is passed, the stackTrace parameter is ignored.\n   */\n  readonly stackTraceOverride?: string[];\n}\n\n// Mark all instances of 'Construct'\nObject.defineProperty(Construct.prototype, CONSTRUCT_SYM, {\n  value: true,\n  enumerable: false,\n  writable: false,\n});\n\n/**\n * Creates a new root construct node.\n *\n * The root construct represents the top of the construct tree and is not contained within a parent scope itself.\n * For root constructs, the id is optional.\n */\nexport class RootConstruct extends Construct {\n  /**\n   * Creates a new root construct node.\n   *\n   * @param id The scoped construct ID. Must be unique amongst siblings. If\n   * the ID includes a path separator (`/`), then it will be replaced by double\n   * dash `--`.\n   */\n  constructor(id?: string) {\n    super(undefined as any, id ?? '');\n  }\n}\n"]}
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