@aws-cdk/core
Version:
AWS Cloud Development Kit Core Library
75 lines • 11.5 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const encoding_1 = require("./private/encoding");
const token_map_1 = require("./private/token-map");
/**
* Converts all fragments to strings and concats those
*
* Drops 'undefined's.
*/
class StringConcat {
join(left, right) {
if (left === undefined) {
return right !== undefined ? `${right}` : undefined;
}
if (right === undefined) {
return `${left}`;
}
return `${left}${right}`;
}
}
exports.StringConcat = StringConcat;
/**
* Default resolver implementation
*
* @experimental
*/
class DefaultTokenResolver {
constructor(concat) {
this.concat = concat;
}
/**
* Default Token resolution
*
* Resolve the Token, recurse into whatever it returns,
* then finally post-process it.
*/
resolveToken(t, context, postProcessor) {
try {
let resolved = t.resolve(context);
// The token might have returned more values that need resolving, recurse
resolved = context.resolve(resolved);
resolved = postProcessor.postProcess(resolved, context);
return resolved;
}
catch (e) {
let message = `Resolution error: ${e.message}.`;
if (t.creationStack && t.creationStack.length > 0) {
message += `\nObject creation stack:\n at ${t.creationStack.join('\n at ')}`;
}
e.message = message;
throw e;
}
}
/**
* Resolve string fragments to Tokens
*/
resolveString(fragments, context) {
return fragments.mapTokens({ mapToken: context.resolve }).join(this.concat);
}
resolveList(xs, context) {
// Must be a singleton list token, because concatenation is not allowed.
if (xs.length !== 1) {
throw new Error(`Cannot add elements to list token, got: ${xs}`);
}
const str = encoding_1.TokenString.forListToken(xs[0]);
const tokenMap = token_map_1.TokenMap.instance();
const fragments = str.split(tokenMap.lookupToken.bind(tokenMap));
if (fragments.length !== 1) {
throw new Error(`Cannot concatenate strings in a tokenized string array, got: ${xs[0]}`);
}
return fragments.mapTokens({ mapToken: context.resolve }).firstValue;
}
}
exports.DefaultTokenResolver = DefaultTokenResolver;
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`${right}` : undefined; }\n    if (right === undefined) { return `${left}`; }\n    return `${left}${right}`;\n  }\n}\n\n/**\n * Default resolver implementation\n *\n * @experimental\n */\nexport class DefaultTokenResolver implements ITokenResolver {\n  constructor(private readonly concat: IFragmentConcatenator) {\n  }\n\n  /**\n   * Default Token resolution\n   *\n   * Resolve the Token, recurse into whatever it returns,\n   * then finally post-process it.\n   */\n  public resolveToken(t: IResolvable, context: IResolveContext, postProcessor: IPostProcessor) {\n    try {\n      let resolved = t.resolve(context);\n\n      // The token might have returned more values that need resolving, recurse\n      resolved = context.resolve(resolved);\n      resolved = postProcessor.postProcess(resolved, context);\n      return resolved;\n    } catch (e) {\n      let message = `Resolution error: ${e.message}.`;\n      if (t.creationStack && t.creationStack.length > 0) {\n        message += `\\nObject creation stack:\\n  at ${t.creationStack.join('\\n  at ')}`;\n      }\n\n      e.message = message;\n      throw e;\n    }\n  }\n\n  /**\n   * Resolve string fragments to Tokens\n   */\n  public resolveString(fragments: TokenizedStringFragments, context: IResolveContext) {\n    return fragments.mapTokens({ mapToken: context.resolve }).join(this.concat);\n  }\n\n  public resolveList(xs: string[], context: IResolveContext) {\n    // Must be a singleton list token, because concatenation is not allowed.\n    if (xs.length !== 1) {\n      throw new Error(`Cannot add elements to list token, got: ${xs}`);\n    }\n\n    const str = TokenString.forListToken(xs[0]);\n    const tokenMap = TokenMap.instance();\n    const fragments = str.split(tokenMap.lookupToken.bind(tokenMap));\n    if (fragments.length !== 1) {\n      throw new Error(`Cannot concatenate strings in a tokenized string array, got: ${xs[0]}`);\n    }\n\n    return fragments.mapTokens({ mapToken: context.resolve }).firstValue;\n  }\n}\n"]}