github.com/weaviate/weaviate@v1.24.6/adapters/repos/db/sorter/comparator.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 sorter
    13  
    14  type comparator struct {
    15  	comparators []basicComparator
    16  }
    17  
    18  func newComparator(dataTypesHelper *dataTypesHelper, propNames []string, orders []string) *comparator {
    19  	provider := &basicComparatorProvider{}
    20  	comparators := make([]basicComparator, len(propNames))
    21  	for level, propName := range propNames {
    22  		dataType := dataTypesHelper.getType(propName)
    23  		comparators[level] = provider.provide(dataType, orders[level])
    24  	}
    25  	return &comparator{comparators}
    26  }
    27  
    28  func (c *comparator) compare(a, b *comparable) int {
    29  	for level, comparator := range c.comparators {
    30  		if res := comparator.compare(a.values[level], b.values[level]); res != 0 {
    31  			return res
    32  		}
    33  	}
    34  	return 0
    35  }