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import { AnnotationContext } from '../../annotation-context';
import { AnnotationRef } from '../../annotation-ref';
import { AnnotationKind, AnnotationStub } from '../../annotation.types';
import { AnnotationTarget } from '../../target/annotation-target';
import { AnnotationTargetFactory } from '../../target/annotation-target.factory';
import { _AnnotationTargetImpl } from '../../target/annotation-target.impl';
import { _AnnotationContextSet } from './annotation-context-set';
import { BoundAnnotationContext } from './bound-annotation-context';
export interface AnnotationSelectorOptions {
/**
* Search for the annotation in parent classes.
*/
searchParents: boolean;
}
export class AnnotationsSelector<
T extends AnnotationKind = AnnotationKind,
S extends AnnotationStub = AnnotationStub,
X = unknown,
> {
private readonly targetFactory: AnnotationTargetFactory;
private readonly annotationSet: _AnnotationContextSet;
private readonly annotationsRefs: Set<AnnotationRef> | undefined;
private readonly decoratorTypes: T[];
private readonly type?: ConstructorType<X>;
private readonly propertyKey?: string | symbol;
private readonly parameterIndex?: number;
constructor(selector: AnnotationsSelector<T, S, X>);
constructor(
targetFactory: AnnotationTargetFactory,
annotationSet: _AnnotationContextSet,
annotationsRefs: Set<AnnotationRef> | undefined,
decoratorTypes: T[],
type?: ConstructorType<X> | X,
propertyKey?: string | symbol,
parameterIndex?: number,
);
constructor(
targetFactory: AnnotationTargetFactory | AnnotationsSelector<T, S, X>,
annotationSet?: _AnnotationContextSet,
annotationsRefs?: Set<AnnotationRef> | undefined,
decoratorTypes?: T[],
type?: ConstructorType<X> | X,
propertyKey?: string | symbol,
parameterIndex?: number,
) {
if (targetFactory instanceof AnnotationsSelector) {
const selection = targetFactory;
this.targetFactory = selection.targetFactory;
this.annotationSet = selection.annotationSet;
this.annotationsRefs = selection.annotationsRefs;
this.decoratorTypes = selection.decoratorTypes;
this.type = selection.type;
this.propertyKey = selection.propertyKey;
this.parameterIndex = selection.parameterIndex;
} else {
this.targetFactory = targetFactory;
this.annotationSet = annotationSet!;
this.annotationsRefs = annotationsRefs;
this.decoratorTypes = decoratorTypes!;
this.type = type ? getPrototype(type).constructor : undefined;
this.propertyKey = propertyKey;
this.parameterIndex = parameterIndex;
}
}
find(options?: AnnotationSelectorOptions): AnnotationContext<T, S, X>[] {
if (!this.type) {
assert(!options?.searchParents);
return this.annotationSet.getAnnotations(
this.decoratorTypes,
this.annotationsRefs,
undefined,
this.propertyKey,
) as AnnotationContext<T, S, X>[];
}
// search annotations on given type
const classTarget = this.targetFactory.of(this.type);
assert(!!classTarget);
Iif (!classTarget) {
return [];
}
// search extends the search to parent types ?
const classTargets =
options?.searchParents ?? true
? [classTarget, ...getAncestors(classTarget)]
: [classTarget];
const contexts = classTargets
.map((target) => target.ref)
.flatMap((ref) =>
this.annotationSet.getAnnotations(
this.decoratorTypes,
this.annotationsRefs,
ref,
this.propertyKey,
),
) as AnnotationContext<T, S, X>[];
if (typeof this.parameterIndex === 'undefined') {
return contexts;
}
return contexts.filter(
(c) =>
(c.target as AnnotationTarget<AnnotationKind.PARAMETER>)
.parameterIndex === this.parameterIndex,
);
}
}
function getAncestors<T extends AnnotationKind>(
target: AnnotationTarget<T, any>,
): Array<AnnotationTarget<T, any>> {
if (!target.parentClass) {
return [];
}
return [
target.parentClass as AnnotationTarget<T, any>,
...getAncestors<T>(target.parentClass as AnnotationTarget<T, any>),
];
}
export class BoundAnnotationsSelector<
T extends AnnotationKind = AnnotationKind,
S extends AnnotationStub = AnnotationStub,
X = unknown,
> extends AnnotationsSelector<T, S, X> {
constructor(
selector: AnnotationsSelector<T, S, X>,
private instance: unknown,
private args?: unknown[],
) {
super(selector);
}
override find(
options?: AnnotationSelectorOptions,
): BoundAnnotationContext<T, S, X>[] {
return super.find(options).map((ctxt) => {
return Object.setPrototypeOf(
{
...ctxt,
target: (ctxt.target as _AnnotationTargetImpl)._bind(
this.instance,
this.args,
),
},
Object.getPrototypeOf(ctxt),
);
});
}
}
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