github.com/weaviate/weaviate@v1.24.6/adapters/repos/db/vector/compressionhelpers/compression_distance_bag.go (about)

     1  //                           _       _
     2  // __      _____  __ ___   ___  __ _| |_ ___
     3  // \ \ /\ / / _ \/ _` \ \ / / |/ _` | __/ _ \
     4  //  \ V  V /  __/ (_| |\ V /| | (_| | ||  __/
     5  //   \_/\_/ \___|\__,_| \_/ |_|\__,_|\__\___|
     6  //
     7  //  Copyright © 2016 - 2024 Weaviate B.V. All rights reserved.
     8  //
     9  //  CONTACT: hello@weaviate.io
    10  //
    11  
    12  package compressionhelpers
    13  
    14  import (
    15  	"context"
    16  	"fmt"
    17  )
    18  
    19  type CompressionDistanceBag interface {
    20  	Load(ctx context.Context, id uint64) error
    21  	Distance(x, y uint64) (float32, error)
    22  }
    23  
    24  type quantizedDistanceBag[T byte | uint64] struct {
    25  	elements   map[uint64][]T
    26  	compressor *quantizedVectorsCompressor[T]
    27  }
    28  
    29  func (bag *quantizedDistanceBag[T]) Load(ctx context.Context, id uint64) error {
    30  	var err error
    31  	bag.elements[id], err = bag.compressor.cache.Get(ctx, id)
    32  	return err
    33  }
    34  
    35  func (bag *quantizedDistanceBag[T]) Distance(x, y uint64) (float32, error) {
    36  	v1, found := bag.elements[x]
    37  	if !found {
    38  		return 0, fmt.Errorf("missing id in bag: %d", x)
    39  	}
    40  	v2, found := bag.elements[y]
    41  	if !found {
    42  		return 0, fmt.Errorf("missing id in bag: %d", y)
    43  	}
    44  	return bag.compressor.DistanceBetweenCompressedVectors(v1, v2)
    45  }