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330 lines
10 KiB
TypeScript
330 lines
10 KiB
TypeScript
// Loaded from https://deno.land/x/graphql_deno@v15.0.0/lib/type/schema.js
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import find from '../polyfills/find.js';
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import arrayFrom from '../polyfills/arrayFrom.js';
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import objectValues from '../polyfills/objectValues.js';
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import { SYMBOL_TO_STRING_TAG } from '../polyfills/symbols.js';
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import inspect from '../jsutils/inspect.js';
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import toObjMap from '../jsutils/toObjMap.js';
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import devAssert from '../jsutils/devAssert.js';
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import instanceOf from '../jsutils/instanceOf.js';
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import isObjectLike from '../jsutils/isObjectLike.js';
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import { __Schema } from './introspection.js';
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import { GraphQLDirective, isDirective, specifiedDirectives } from './directives.js';
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import { isObjectType, isInterfaceType, isUnionType, isInputObjectType, getNamedType } from './definition.js';
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/**
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* Test if the given value is a GraphQL schema.
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*/
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// eslint-disable-next-line no-redeclare
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export function isSchema(schema) {
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return instanceOf(schema, GraphQLSchema);
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}
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export function assertSchema(schema) {
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if (!isSchema(schema)) {
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throw new Error(`Expected ${inspect(schema)} to be a GraphQL schema.`);
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}
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return schema;
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}
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/**
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* Schema Definition
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*
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* A Schema is created by supplying the root types of each type of operation,
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* query and mutation (optional). A schema definition is then supplied to the
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* validator and executor.
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*
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* Example:
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*
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* const MyAppSchema = new GraphQLSchema({
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* query: MyAppQueryRootType,
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* mutation: MyAppMutationRootType,
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* })
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*
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* Note: When the schema is constructed, by default only the types that are
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* reachable by traversing the root types are included, other types must be
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* explicitly referenced.
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*
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* Example:
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*
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* const characterInterface = new GraphQLInterfaceType({
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* name: 'Character',
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* ...
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* });
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*
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* const humanType = new GraphQLObjectType({
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* name: 'Human',
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* interfaces: [characterInterface],
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* ...
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* });
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*
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* const droidType = new GraphQLObjectType({
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* name: 'Droid',
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* interfaces: [characterInterface],
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* ...
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* });
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*
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* const schema = new GraphQLSchema({
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* query: new GraphQLObjectType({
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* name: 'Query',
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* fields: {
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* hero: { type: characterInterface, ... },
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* }
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* }),
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* ...
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* // Since this schema references only the `Character` interface it's
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* // necessary to explicitly list the types that implement it if
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* // you want them to be included in the final schema.
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* types: [humanType, droidType],
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* })
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*
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* Note: If an array of `directives` are provided to GraphQLSchema, that will be
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* the exact list of directives represented and allowed. If `directives` is not
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* provided then a default set of the specified directives (e.g. @include and
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* @skip) will be used. If you wish to provide *additional* directives to these
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* specified directives, you must explicitly declare them. Example:
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*
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* const MyAppSchema = new GraphQLSchema({
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* ...
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* directives: specifiedDirectives.concat([ myCustomDirective ]),
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* })
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*
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*/
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export class GraphQLSchema {
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// Used as a cache for validateSchema().
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constructor(config) {
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// If this schema was built from a source known to be valid, then it may be
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// marked with assumeValid to avoid an additional type system validation.
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this.__validationErrors = config.assumeValid === true ? [] : undefined; // Check for common mistakes during construction to produce early errors.
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devAssert(isObjectLike(config), 'Must provide configuration object.');
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devAssert(!config.types || Array.isArray(config.types), `"types" must be Array if provided but got: ${inspect(config.types)}.`);
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devAssert(!config.directives || Array.isArray(config.directives), '"directives" must be Array if provided but got: ' + `${inspect(config.directives)}.`);
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this.description = config.description;
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this.extensions = config.extensions && toObjMap(config.extensions);
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this.astNode = config.astNode;
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this.extensionASTNodes = config.extensionASTNodes;
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this._queryType = config.query;
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this._mutationType = config.mutation;
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this._subscriptionType = config.subscription; // Provide specified directives (e.g. @include and @skip) by default.
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this._directives = config.directives ?? specifiedDirectives; // To preserve order of user-provided types, we add first to add them to
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// the set of "collected" types, so `collectReferencedTypes` ignore them.
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const allReferencedTypes = new Set(config.types);
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if (config.types != null) {
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for (const type of config.types) {
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// When we ready to process this type, we remove it from "collected" types
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// and then add it together with all dependent types in the correct position.
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allReferencedTypes.delete(type);
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collectReferencedTypes(type, allReferencedTypes);
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}
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}
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if (this._queryType != null) {
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collectReferencedTypes(this._queryType, allReferencedTypes);
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}
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if (this._mutationType != null) {
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collectReferencedTypes(this._mutationType, allReferencedTypes);
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}
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if (this._subscriptionType != null) {
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collectReferencedTypes(this._subscriptionType, allReferencedTypes);
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}
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for (const directive of this._directives) {
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// Directives are not validated until validateSchema() is called.
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if (isDirective(directive)) {
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for (const arg of directive.args) {
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collectReferencedTypes(arg.type, allReferencedTypes);
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}
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}
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}
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collectReferencedTypes(__Schema, allReferencedTypes); // Storing the resulting map for reference by the schema.
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this._typeMap = Object.create(null);
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this._subTypeMap = Object.create(null); // Keep track of all implementations by interface name.
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this._implementationsMap = Object.create(null);
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for (const namedType of arrayFrom(allReferencedTypes)) {
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if (namedType == null) {
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continue;
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}
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const typeName = namedType.name;
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devAssert(typeName, 'One of the provided types for building the Schema is missing a name.');
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if (this._typeMap[typeName] !== undefined) {
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throw new Error(`Schema must contain uniquely named types but contains multiple types named "${typeName}".`);
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}
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this._typeMap[typeName] = namedType;
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if (isInterfaceType(namedType)) {
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// Store implementations by interface.
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for (const iface of namedType.getInterfaces()) {
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if (isInterfaceType(iface)) {
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let implementations = this._implementationsMap[iface.name];
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if (implementations === undefined) {
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implementations = this._implementationsMap[iface.name] = {
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objects: [],
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interfaces: []
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};
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}
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implementations.interfaces.push(namedType);
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}
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}
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} else if (isObjectType(namedType)) {
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// Store implementations by objects.
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for (const iface of namedType.getInterfaces()) {
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if (isInterfaceType(iface)) {
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let implementations = this._implementationsMap[iface.name];
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if (implementations === undefined) {
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implementations = this._implementationsMap[iface.name] = {
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objects: [],
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interfaces: []
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};
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}
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implementations.objects.push(namedType);
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}
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}
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}
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}
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}
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getQueryType() {
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return this._queryType;
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}
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getMutationType() {
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return this._mutationType;
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}
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getSubscriptionType() {
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return this._subscriptionType;
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}
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getTypeMap() {
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return this._typeMap;
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}
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getType(name) {
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return this.getTypeMap()[name];
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}
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getPossibleTypes(abstractType) {
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return isUnionType(abstractType) ? abstractType.getTypes() : this.getImplementations(abstractType).objects;
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}
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getImplementations(interfaceType) {
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const implementations = this._implementationsMap[interfaceType.name];
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return implementations ?? {
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objects: [],
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interfaces: []
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};
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} // @deprecated: use isSubType instead - will be removed in v16.
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isPossibleType(abstractType, possibleType) {
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return this.isSubType(abstractType, possibleType);
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}
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isSubType(abstractType, maybeSubType) {
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let map = this._subTypeMap[abstractType.name];
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if (map === undefined) {
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map = Object.create(null);
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if (isUnionType(abstractType)) {
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for (const type of abstractType.getTypes()) {
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map[type.name] = true;
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}
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} else {
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const implementations = this.getImplementations(abstractType);
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for (const type of implementations.objects) {
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map[type.name] = true;
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}
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for (const type of implementations.interfaces) {
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map[type.name] = true;
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}
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}
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this._subTypeMap[abstractType.name] = map;
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}
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return map[maybeSubType.name] !== undefined;
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}
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getDirectives() {
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return this._directives;
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}
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getDirective(name) {
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return find(this.getDirectives(), directive => directive.name === name);
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}
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toConfig() {
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return {
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description: this.description,
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query: this.getQueryType(),
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mutation: this.getMutationType(),
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subscription: this.getSubscriptionType(),
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types: objectValues(this.getTypeMap()),
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directives: this.getDirectives().slice(),
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extensions: this.extensions,
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astNode: this.astNode,
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extensionASTNodes: this.extensionASTNodes ?? [],
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assumeValid: this.__validationErrors !== undefined
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};
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} // $FlowFixMe Flow doesn't support computed properties yet
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get [SYMBOL_TO_STRING_TAG]() {
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return 'GraphQLSchema';
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}
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}
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function collectReferencedTypes(type, typeSet) {
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const namedType = getNamedType(type);
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if (!typeSet.has(namedType)) {
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typeSet.add(namedType);
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if (isUnionType(namedType)) {
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for (const memberType of namedType.getTypes()) {
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collectReferencedTypes(memberType, typeSet);
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}
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} else if (isObjectType(namedType) || isInterfaceType(namedType)) {
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for (const interfaceType of namedType.getInterfaces()) {
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collectReferencedTypes(interfaceType, typeSet);
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}
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for (const field of objectValues(namedType.getFields())) {
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collectReferencedTypes(field.type, typeSet);
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for (const arg of field.args) {
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collectReferencedTypes(arg.type, typeSet);
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}
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}
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} else if (isInputObjectType(namedType)) {
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for (const field of objectValues(namedType.getFields())) {
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collectReferencedTypes(field.type, typeSet);
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}
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}
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}
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return typeSet;
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} |