capnp-ts/src/serialization/pointers/composite-list.ts

Strongly typed Cap'n Proto implementation for the browser and Node.js using TypeScript

/**
 * @author jdiaz5513
 */

import initTrace from "debug";

import { ListElementSize } from "../list-element-size";
import { _ListCtor, List, ListCtor } from "./list";
import { Struct, StructCtor } from "./struct";
import { copyFrom } from "./pointer";

const trace = initTrace("capnp:list:composite");
trace("load");

export function CompositeList<T extends Struct>(CompositeClass: StructCtor<T>): ListCtor<T> {
  return class extends List<T> {
    static readonly _capnp: _ListCtor = {
      compositeSize: CompositeClass._capnp.size,
      displayName: `List<${CompositeClass._capnp.displayName}>`,
      size: ListElementSize.COMPOSITE,
    };

    get(index: number): T {
      return new CompositeClass(this.segment, this.byteOffset, this._capnp.depthLimit - 1, index);
    }

    set(index: number, value: T): void {
      copyFrom(value, this.get(index));
    }

    toString(): string {
      return `Composite_${super.toString()},cls:${CompositeClass.toString()}`;
    }
  };
}