# deriveMapping

Canonical: https://docs.shumoku.dev/ja/library/api/deriveMapping
Language: ja

@shumoku/core · 0.6.1 · function

# deriveMapping

[ソース](https://github.com/konoe-akitoshi/shumoku/blob/main/libs/@shumoku/core/src/libs/@shumoku/core/src/observation/metrics-binding.ts#L57)

APIの説明は英語のcanonical sourceを表示しています。

Derive a legacy \`MetricsMapping\` from the bindings in an observation record, keyed by the drawn graph's element ids (the record is keyed by the same ids). - Node host binding → \`mapping.nodes\[node.id\]\`. - Link interface binding lives on a port's record; we attribute it to the link whose endpoint references that port, keyed \`link.id || link-${i}\` to match the rest of the server (server.ts / topologies.ts). Pure; never mutates the input.

```
deriveMapping(graph: Pick<NetworkGraph, "nodes" | "links">, observation: ObservationLayer | undefined, activeSourceIds?: ReadonlySet<string>): MetricsMapping
```

## パラメーター

| 名前 | 型 | 説明 | 既定値 |
| --- | --- | --- | --- |
| `graph` | `Pick<NetworkGraph, "nodes" | "links">` | 追加説明はありません。 | `—` |
| `observation` | `ObservationLayer | undefined` | 追加説明はありません。 | `—` |
| `activeSourceIds` | `ReadonlySet<string>` | 追加説明はありません。 | `—` |

## 戻り値

```
MetricsMapping
```

[`libs/@shumoku/core/src/libs/@shumoku/core/src/observation/metrics-binding.ts:57`](https://github.com/konoe-akitoshi/shumoku/blob/main/libs/@shumoku/core/src/libs/@shumoku/core/src/observation/metrics-binding.ts#L57)