Method resolveChildTypeMetadataSet

src/type-metadata.ts:955–998

* Resolved child type metadata set for provided type metadata reflecting inheritance order where the * first element is the current type metadata and the last element is the most specific child. This * collection is used to define polymorphic relationships between types. * * @

(
        typeMetadata: TypeMetadata<any>, 
        childTypeMetadataSet: Set<TypeMetadata<any>> = new Set<TypeMetadata<any>>()
    )

     * @returns {ReadonlySet<TypeMetadata<any>>} Child type metadata set.
     */
    private resolveChildTypeMetadataSet(
        typeMetadata: TypeMetadata<any>, 
        childTypeMetadataSet: Set<TypeMetadata<any>> = new Set<TypeMetadata<any>>()
    ): ReadonlySet<TypeMetadata<any>>
    {
        if (childTypeMetadataSet.has(typeMetadata))
        {
            return childTypeMetadataSet;
        }

        childTypeMetadataSet.add(typeMetadata);

        for (const childTypeMetadata of typeMetadata.currentChildTypeMetadataMap.values())
        {
            this.resolveChildTypeMetadataSet(childTypeMetadata, childTypeMetadataSet);

            childTypeMetadata.unresolveTypeState();
        }

        for (const setTypeMetadata of this.typeMetadataSet)
        {
            const typeOptions = setTypeMetadata.typeOptions;

            const parentTypeArguments = typeOptions.parentTypeArguments === undefined
                ? EMPTY_ARRAY
                : typeOptions.parentTypeArguments;

            const parentTypeMetadatas = this.resolveTypeMetadatas(parentTypeArguments);

            for (let i = 0; i < parentTypeMetadatas.length; i++)
            {
                if (parentTypeMetadatas[i] === typeMetadata)
                {
                    this.resolveChildTypeMetadataSet(setTypeMetadata, childTypeMetadataSet);
                    
                    setTypeMetadata.unresolveTypeState();

                    break;
                }
            }
        }

        return childTypeMetadataSet;
    }

    /**
     * Resolves property metadata map.