github.com/weaviate/weaviate@v1.24.6/adapters/repos/db/sorter/comparable_creator.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  import "github.com/weaviate/weaviate/entities/storobj"
    15  
    16  type comparable struct {
    17  	docID uint64
    18  	// all property values that will be used for comparison
    19  	// most important 1st, least important last
    20  	values []interface{}
    21  	// additional payload to hold data related to object, not used in sorting process
    22  	payload interface{}
    23  }
    24  
    25  type comparableCreator struct {
    26  	extractor *comparableValueExtractor
    27  	propNames []string
    28  }
    29  
    30  func newComparableCreator(extractor *comparableValueExtractor, propNames []string) *comparableCreator {
    31  	return &comparableCreator{extractor, propNames}
    32  }
    33  
    34  func (c *comparableCreator) createFromBytes(docID uint64, objData []byte) *comparable {
    35  	return c.createFromBytesWithPayload(docID, objData, nil)
    36  }
    37  
    38  func (c *comparableCreator) createFromBytesWithPayload(docID uint64, objData []byte, payload interface{}) *comparable {
    39  	values := make([]interface{}, len(c.propNames))
    40  	for level, propName := range c.propNames {
    41  		values[level] = c.extractor.extractFromBytes(objData, propName)
    42  	}
    43  	return &comparable{docID, values, payload}
    44  }
    45  
    46  // func (c *comparableCreator) createFromObject(object *storobj.Object) *comparable {
    47  // 	return c.createFromObjectWithPayload(object, nil)
    48  // }
    49  
    50  func (c *comparableCreator) createFromObjectWithPayload(object *storobj.Object, payload interface{}) *comparable {
    51  	values := make([]interface{}, len(c.propNames))
    52  	for level, propName := range c.propNames {
    53  		values[level] = c.extractor.extractFromObject(object, propName)
    54  	}
    55  	return &comparable{object.DocID, values, payload}
    56  }
    57  
    58  func (c *comparableCreator) extractDocIDs(comparables []*comparable) []uint64 {
    59  	docIDs := make([]uint64, len(comparables))
    60  	for i, comparable := range comparables {
    61  		docIDs[i] = comparable.docID
    62  	}
    63  	return docIDs
    64  }
    65  
    66  func (c *comparableCreator) extractPayloads(comparables []*comparable,
    67  	consume func(i int, docID uint64, payload interface{}) (stop bool),
    68  ) {
    69  	for i, comparable := range comparables {
    70  		if consume(i, comparable.docID, comparable.payload) {
    71  			break
    72  		}
    73  	}
    74  }