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src/observable/map/BaseObservableMapDefaults.ts -> src/observable/map/BaseObservableMapTransformers.ts

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This commit is contained in:
Isaiah Becker-Mayer 2022-07-31 19:53:34 -07:00
parent 70b68c5b16
commit dd01e70b4a
8 changed files with 35 additions and 20 deletions
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4
src/observable/map/ApplyMap.ts
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@ -16,7 +16,7 @@ limitations under the License.
import {BaseObservableMap} from "./BaseObservableMap";
import {SubscriptionHandle} from "../BaseObservable";
import {BaseObservableMapDefaults} from "./BaseObservableMapDefaults";
import {BaseObservableMapTransformers} from "./BaseObservableMapTransformers";
export class ApplyMap<K, V> extends BaseObservableMap<K, V> {
@ -26,7 +26,7 @@ export class ApplyMap<K, V> extends BaseObservableMap<K, V> {
constructor(source: BaseObservableMap<K, V>, apply?: Apply<K, V>) {
super(new BaseObservableMapDefaults<K, V>());
super(new BaseObservableMapTransformers<K, V>());
this._source = source;
this._apply = apply;
}

6
src/observable/map/BaseObservableMap.ts
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@ -19,7 +19,7 @@ import {JoinedMap} from "../map/JoinedMap";
import {MappedMap} from "../map/MappedMap";
import {FilteredMap} from "../map/FilteredMap";
import {SortedMapList} from "../list/SortedMapList.js";
import type {BaseObservableMapDefaults, Mapper, Updater, Comparator, Filter} from "./BaseObservableMapDefaults";
import type {BaseObservableMapTransformers, Mapper, Updater, Comparator, Filter} from "./BaseObservableMapTransformers";
export interface IMapObserver<K, V> {
@ -30,9 +30,9 @@ export interface IMapObserver<K, V> {
}
export abstract class BaseObservableMap<K, V> extends BaseObservable<IMapObserver<K, V>> {
private _defaults: BaseObservableMapDefaults<K, V>;
private _defaults: BaseObservableMapTransformers<K, V>;
constructor(defaults: BaseObservableMapDefaults<K, V>) {
constructor(defaults: BaseObservableMapTransformers<K, V>) {
super();
this._defaults = defaults;
}

25
src/observable/map/BaseObservableMapDefaults.ts → src/observable/map/BaseObservableMapTransformers.ts
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@ -20,11 +20,26 @@ import {JoinedMap} from "./JoinedMap";
import {SortedMapList} from "../list/SortedMapList.js";
// This class provides implementations of functions that are part of BaseObservableMap.
// It is kept as its own class in its own file in order to avoid a circular
// dependency between the classes that extend BaseObservableMap which are
// instantiated here (i.e. `new JoinedMap()`).
export class BaseObservableMapDefaults<K, V> {
// This class provides implementations of functions that transform one BaseObservableMap
// to another type of Map. It's methods are effectively default implementations of the
// methods by the same name on BaseObservableMap.
//
// It is kept as its own class in its own file in order to avoid circular dependencies
// which would occur if these method implementations were defined on BaseObservableMap
// itself. For example, if we attmpted to do the following on BaseObservableMap:
//
// class BaseObservableMap<K, V> extends BaseObservable<IMapObserver<K, V>> {
// join(...otherMaps: Array<BaseObservableMap<K, V>>): JoinedMap<K, V> {
// return new JoinedMap(this.concat(otherMaps));
// }
// }
//
// we would end up with a circular dependency between BaseObservableMap and JoinedMap,
// since BaseObservableMap would need to import JoinedMap for the
// `return new JoinedMap(this.concat(otherMaps))`, and
// JoinedMap would need to import BaseObservableMap to do
// `JoinedMap<K, V> extends BaseObservableMap<K, V>`.
export class BaseObservableMapTransformers<K, V> {
join(_this: BaseObservableMap<K, V>, ...otherMaps: Array<BaseObservableMap<K, V>>): JoinedMap<K, V> {
return new JoinedMap([_this].concat(otherMaps));
}

4
src/observable/map/FilteredMap.ts
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@ -16,7 +16,7 @@ limitations under the License.
import {BaseObservableMap} from "./BaseObservableMap";
import {SubscriptionHandle} from "../BaseObservable";
import {BaseObservableMapDefaults, Filter} from "./BaseObservableMapDefaults";
import {BaseObservableMapTransformers, Filter} from "./BaseObservableMapTransformers";
export class FilteredMap<K, V> extends BaseObservableMap<K, V> {
@ -26,7 +26,7 @@ export class FilteredMap<K, V> extends BaseObservableMap<K, V> {
private _subscription?: SubscriptionHandle;
constructor(source: BaseObservableMap<K, V>, filter: Filter<K, V>) {
super(new BaseObservableMapDefaults<K, V>());
super(new BaseObservableMapTransformers<K, V>());
this._source = source;
this._filter = filter;
}

4
src/observable/map/JoinedMap.ts
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@ -15,7 +15,7 @@ limitations under the License.
*/
import {BaseObservableMap} from "./BaseObservableMap";
import {BaseObservableMapDefaults} from "./BaseObservableMapDefaults";
import {BaseObservableMapTransformers} from "./BaseObservableMapTransformers";
import {SubscriptionHandle} from "../BaseObservable";
@ -24,7 +24,7 @@ export class JoinedMap<K, V> extends BaseObservableMap<K, V> {
private _subscriptions?: SourceSubscriptionHandler<K, V>[];
constructor(sources: BaseObservableMap<K, V>[]) {
super(new BaseObservableMapDefaults<K, V>());
super(new BaseObservableMapTransformers<K, V>());
this._sources = sources;
}

4
src/observable/map/LogMap.ts
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@ -15,7 +15,7 @@ limitations under the License.
*/
import {BaseObservableMap} from "./BaseObservableMap";
import {BaseObservableMapDefaults} from "./BaseObservableMapDefaults";
import {BaseObservableMapTransformers} from "./BaseObservableMapTransformers";
import {SubscriptionHandle} from "../BaseObservable";
import {ILogItem, LabelOrValues} from "../../logging/types";
import {LogLevel} from "../../logging/LogFilter";
@ -27,7 +27,7 @@ export class LogMap<K, V> extends BaseObservableMap<K, V> {
private _log: ILogItem;
constructor(source: BaseObservableMap<K, V>, log: ILogItem) {
super(new BaseObservableMapDefaults<K, V>());
super(new BaseObservableMapTransformers<K, V>());
this._source = source;
this._log = log;
}

4
src/observable/map/MappedMap.ts
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@ -15,7 +15,7 @@ limitations under the License.
*/
import {BaseObservableMap} from "./BaseObservableMap";
import {BaseObservableMapDefaults, Mapper, Updater} from "./BaseObservableMapDefaults";
import {BaseObservableMapTransformers, Mapper, Updater} from "./BaseObservableMapTransformers";
import {SubscriptionHandle} from "../BaseObservable";
@ -36,7 +36,7 @@ export class MappedMap<K, V> extends BaseObservableMap<K, V> {
mapper: Mapper<V>,
updater?: Updater<V>
) {
super(new BaseObservableMapDefaults<K, V>());
super(new BaseObservableMapTransformers<K, V>());
this._source = source;
this._mapper = mapper;
this._updater = updater;

4
src/observable/map/ObservableMap.ts
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@ -15,14 +15,14 @@ limitations under the License.
*/
import {BaseObservableMap} from "./BaseObservableMap";
import {BaseObservableMapDefaults} from "./BaseObservableMapDefaults";
import {BaseObservableMapTransformers} from "./BaseObservableMapTransformers";
export class ObservableMap<K, V> extends BaseObservableMap<K, V> {
private readonly _values: Map<K, V>;
constructor(initialValues?: (readonly [K, V])[]) {
super(new BaseObservableMapDefaults<K, V>());
super(new BaseObservableMapTransformers<K, V>());
this._values = new Map(initialValues);
}