Method lookup

packages/db/src/indexes/basic-index.ts:204–234

* Performs a lookup operation

(operation: IndexOperation, value: any)

   * Performs a lookup operation
   */
  lookup(operation: IndexOperation, value: any): Set<TKey> {
    const startTime = performance.now()

    let result: Set<TKey>

    switch (operation) {
      case `eq`:
        result = this.equalityLookup(value)
        break
      case `gt`:
        result = this.rangeQuery({ from: value, fromInclusive: false })
        break
      case `gte`:
        result = this.rangeQuery({ from: value, fromInclusive: true })
        break
      case `lt`:
        result = this.rangeQuery({ to: value, toInclusive: false })
        break
      case `lte`:
        result = this.rangeQuery({ to: value, toInclusive: true })
        break
      case `in`:
        result = this.inArrayLookup(value)
        break
      default:
        throw new Error(`Operation ${operation} not supported by BasicIndex`)
    }

    this.trackLookup(startTime)
    return result
  }

  /**
   * Gets the number of indexed keys