/*!
 * Copyright 2020 Ron Buckton
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import type { GraphSchema } from "./graphSchema";
import type { GraphSchemaNameLike } from "./graphSchemaNameLike";
import { BaseCollection } from "./baseCollection";
import { EventSubscription } from "./events";
/**
 * A collection of child schemas in a schema.
 */
export declare class GraphSchemaCollection extends BaseCollection<GraphSchema> {
    private _schema;
    private _schemas;
    private _events?;
    private constructor();
    /**
     * Gets the schema that owns the collection.
     */
    get schema(): GraphSchema;
    /**
     * Gets the number of schemas in the collection.
     */
    get size(): number;
    /**
     * Creates a subscription for a set of named events.
     */
    subscribe(events: GraphSchemaCollectionEvents): EventSubscription;
    /**
     * Determines whether the collection contains the specified schema.
     */
    has(schema: GraphSchema | GraphSchemaNameLike): boolean;
    /**
     * Gets the property with the specified name.
     */
    get(name: GraphSchemaNameLike): GraphSchema | undefined;
    /**
     * Adds a schema to the collection.
     */
    add(schema: GraphSchema): this;
    /**
     * Gets the schema names in the collection.
     */
    keys(): IterableIterator<GraphSchemaNameLike>;
    /**
     * Gets the schemas in the collection.
     */
    values(): IterableIterator<GraphSchema>;
    /**
     * Gets the schemas in the collection.
     */
    entries(): IterableIterator<[GraphSchemaNameLike, GraphSchema]>;
    /**
     * Gets the schemas in the collection.
     */
    [Symbol.iterator](): IterableIterator<GraphSchema>;
    private _raiseOnAdded;
}
export interface GraphSchemaCollectionEvents {
    /**
     * An event raised when a schema is added to the collection.
     */
    onAdded?: (schema: GraphSchema) => void;
}