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/*****************************************************************************
* Open MCT, Copyright (c) 2014-2021, United States Government
* as represented by the Administrator of the National Aeronautics and Space
* Administration. All rights reserved.
*
* Open MCT is 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.
*
* Open MCT includes source code licensed under additional open source
* licenses. See the Open Source Licenses file (LICENSES.md) included with
* this source code distribution or the Licensing information page available
* at runtime from the About dialog for additional information.
*****************************************************************************/
export default class InterceptorRegistry {
/**
* A InterceptorRegistry maintains the definitions for different interceptors that may be invoked on domain objects.
* @interface InterceptorRegistry
* @memberof module:openmct
*/
constructor() {
this.interceptors = [];
}
/**
* @interface InterceptorDef
* @property {function} appliesTo function that determines if this interceptor should be called for the given identifier/object
* @property {function} invoke function that transforms the provided domain object and returns the transformed domain object
* @property {function} priority the priority for this interceptor. A higher number returned has more weight than a lower number
* @memberof module:openmct InterceptorRegistry#
*/
/**
* Register a new object interceptor.
*
* @param {module:openmct.InterceptorDef} interceptorDef the interceptor to add
* @method addInterceptor
* @memberof module:openmct.InterceptorRegistry#
*/
addInterceptor(interceptorDef) {
//TODO: sort by priority
this.interceptors.push(interceptorDef);
}
/**
* Retrieve all interceptors applicable to a domain object.
* @method getInterceptors
* @returns [module:openmct.InterceptorDef] the registered interceptors for this identifier/object
* @memberof module:openmct.InterceptorRegistry#
*/
getInterceptors(identifier, object) {
return this.interceptors.filter(interceptor => {
return typeof interceptor.appliesTo === 'function'
&& interceptor.appliesTo(identifier, object);
});
}
}
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