Method getResolutionContext

packages/context/src/binding.ts:594–624

* Locate and validate the resolution context * @param ctx - Current context * @param options - Resolution options

(ctx: Context, options: ResolutionOptions)

   * @param options - Resolution options
   */
  private getResolutionContext(ctx: Context, options: ResolutionOptions) {
    const resolutionCtx = ctx.getResolutionContext(this);
    switch (this.scope) {
      case BindingScope.APPLICATION:
      case BindingScope.SERVER:
      case BindingScope.REQUEST:
        if (resolutionCtx == null) {
          const msg =
            `Binding "${this.key}" in context "${ctx.name}" cannot` +
            ` be resolved in scope "${this.scope}"`;
          if (options.optional) {
            debug(msg);
            return undefined;
          }
          throw new Error(msg);
        }
    }

    const ownerCtx = ctx.getOwnerContext(this.key);
    if (ownerCtx != null && !ownerCtx.isVisibleTo(resolutionCtx!)) {
      const msg =
        `Resolution context "${resolutionCtx?.name}" does not have ` +
        `visibility to binding "${this.key} (scope:${this.scope})" in context "${ownerCtx.name}"`;
      if (options.optional) {
        debug(msg);
        return undefined;
      }
      throw new Error(msg);
    }
    return resolutionCtx;
  }

  /**
   * Lock the binding so that it cannot be rebound