@finos/legend-graph
Version:
Legend graph and graph manager
108 lines • 4.14 kB
JavaScript
/**
* Copyright (c) 2020-present, Goldman Sachs
*
* 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 { hashArray, IllegalStateError, uuid, } from '@finos/legend-shared';
import { ELEMENT_PATH_DELIMITER } from '../../../MetaModelConst.js';
import { CORE_HASH_STRUCTURE } from '../../../../graph/Core_HashUtils.js';
import { AnnotatedElement } from './domain/AnnotatedElement.js';
class ModelElement extends AnnotatedElement {
name;
}
export class PackageableElement extends ModelElement {
_UUID = uuid();
_isDeleted = false;
_isDisposed = false;
package;
constructor(name) {
super();
this.name = name;
}
/**
* This logic is specific to the codebase and this is not part of the native metamodel.
* If needed, we can probably move this out as an utility or do type declaration merge
* and define this externally using `Object.defineProperty`.
*
* @internal model logic
*/
get isDeleted() {
return this._isDeleted;
}
/**
* This logic is specific to the codebase and this is not part of the native metamodel.
* If needed, we can probably move this out as an utility or do type declaration merge
* and define this externally using `Object.defineProperty`.
*
* @internal model logic
*/
setIsDeleted(value) {
this._isDeleted = value;
}
/**
* This logic is specific to the codebase and this is not part of the native metamodel.
* If needed, we can probably move this out as an utility or do type declaration merge
* and define this externally using `Object.defineProperty`.
*
* @internal model logic
*/
get path() {
if (!this.package) {
return this.name;
}
const parentPackagePath = this.package.path;
return !parentPackagePath
? this.name
: `${parentPackagePath}${ELEMENT_PATH_DELIMITER}${this.name}`;
}
/**
* Dispose the element and its references to avoid memory leaks.
*
* This logic is specific to the codebase and this is not part of the native metamodel.
* If needed, we can probably move this out as an utility or do type declaration merge
* and define this externally using `Object.defineProperty`.
*
* @internal model logic
*/
dispose() {
this._isDisposed = true;
/**
* Trigger recomputation on `hashCode` so if the element is observed, hash code computation will now
* remove itself from all observables it previously observed
*
* NOTE: for example, we used to do this since we decorate `hashCode` with
* `computed({ keepAlive: true })` which poses a memory-leak threat.
* However, since we're calling `keepAlive` actively now and dispose it right away to return `hashCode` to
* a normal computed value, we might not need this step anymore. But we're being extremely defensive here
* to avoid memory leak.
* See https://mobx.js.org/computeds.html#keepalive
*/
try {
// eslint-disable-next-line @typescript-eslint/no-unused-expressions
this.hashCode;
}
catch {
/* do nothing */
}
}
get _elementHashCode() {
return hashArray([CORE_HASH_STRUCTURE.PACKAGEABLE_ELEMENT, this.path]);
}
get hashCode() {
if (this._isDisposed) {
throw new IllegalStateError(`Element '${this.path}' is already disposed`);
}
return this._elementHashCode;
}
}
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