fromAnnotation static method

Implementation

static ModelHnswParams fromAnnotation(HnswIndex hnsw) {
  // Reject illegal configuration values during a generator run already,
  // otherwise would error at runtime (which might not be easily attributable,
  // see model.dart).
  // See allowed ranges in objectbox-c/src/model.cpp
  _checkArgument(
    argument: hnsw.dimensions,
    condition: hnsw.dimensions > 0,
    name: "dimensions",
    message: "must be 1 or greater",
  );
  final neighborsPerNode = hnsw.neighborsPerNode;
  if (neighborsPerNode != null) {
    _checkArgument(
      argument: neighborsPerNode,
      condition: neighborsPerNode > 0,
      name: "neighborsPerNode",
      message: "must be 1 or greater",
    );
  }
  final indexingSearchCount = hnsw.indexingSearchCount;
  if (indexingSearchCount != null) {
    _checkArgument(
      argument: indexingSearchCount,
      condition: indexingSearchCount > 0,
      name: "indexingSearchCount",
      message: "must be 1 or greater",
    );
  }
  final reparationBacklinkProbability = hnsw.reparationBacklinkProbability;
  if (reparationBacklinkProbability != null) {
    // The C API allows values bigger than 1.0, but internally everything
    // above 0.999 is just mapped to "always": so restrict to max 1.0.
    _checkArgument(
      argument: reparationBacklinkProbability,
      condition:
          reparationBacklinkProbability >= 0.0 &&
          reparationBacklinkProbability <= 1.0,
      name: "reparationBacklinkProbability",
      message: "must be between 0.0 or 1.0",
    );
  }
  final vectorCacheHintSizeKB = hnsw.vectorCacheHintSizeKB;
  if (vectorCacheHintSizeKB != null) {
    _checkArgument(
      argument: vectorCacheHintSizeKB,
      condition: vectorCacheHintSizeKB > 0,
      name: "vectorCacheHintSizeKB",
      message: "must be 1 or greater",
    );
  }
  return ModelHnswParams(
    dimensions: hnsw.dimensions,
    neighborsPerNode: neighborsPerNode,
    indexingSearchCount: indexingSearchCount,
    flags: hnsw.flags?.toFlags(),
    distanceType: hnsw.distanceType?.toConstant(),
    reparationBacklinkProbability: reparationBacklinkProbability,
    vectorCacheHintSizeKB: vectorCacheHintSizeKB,
  );
}