github.com/weaviate/weaviate@v1.24.6/adapters/repos/db/inverted/searcher_value_extractors.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 inverted
    13  
    14  import (
    15  	"bytes"
    16  	"encoding/binary"
    17  	"fmt"
    18  	"time"
    19  
    20  	"github.com/pkg/errors"
    21  )
    22  
    23  func (s *Searcher) extractNumberValue(in interface{}) ([]byte, error) {
    24  	value, ok := in.(float64)
    25  	if !ok {
    26  		return nil, fmt.Errorf("expected value to be float64, got %T", in)
    27  	}
    28  
    29  	return LexicographicallySortableFloat64(value)
    30  }
    31  
    32  // assumes an untyped int and stores as string-formatted int64
    33  func (s *Searcher) extractIntValue(in interface{}) ([]byte, error) {
    34  	value, ok := in.(int)
    35  	if !ok {
    36  		return nil, fmt.Errorf("expected value to be int, got %T", in)
    37  	}
    38  
    39  	return LexicographicallySortableInt64(int64(value))
    40  }
    41  
    42  // assumes an untyped int and stores as string-formatted int64
    43  func (s *Searcher) extractIntCountValue(in interface{}) ([]byte, error) {
    44  	value, ok := in.(int)
    45  	if !ok {
    46  		return nil, fmt.Errorf("expected value to be int, got %T", in)
    47  	}
    48  
    49  	return LexicographicallySortableUint64(uint64(value))
    50  }
    51  
    52  // assumes an untyped bool and stores as bool64
    53  func (s *Searcher) extractBoolValue(in interface{}) ([]byte, error) {
    54  	value, ok := in.(bool)
    55  	if !ok {
    56  		return nil, fmt.Errorf("expected value to be bool, got %T", in)
    57  	}
    58  
    59  	buf := bytes.NewBuffer(nil)
    60  	if err := binary.Write(buf, binary.LittleEndian, value); err != nil {
    61  		return nil, errors.Wrap(err, "encode bool as binary")
    62  	}
    63  
    64  	return buf.Bytes(), nil
    65  }
    66  
    67  // assumes a time.Time date and stores as string-formatted int64, if it
    68  // encounters a string it tries to parse it as a time.Time
    69  func (s *Searcher) extractDateValue(in interface{}) ([]byte, error) {
    70  	var asInt64 int64
    71  
    72  	switch t := in.(type) {
    73  	case string:
    74  		parsed, err := time.Parse(time.RFC3339, t)
    75  		if err != nil {
    76  			return nil, errors.Wrap(err, "trying parse time as RFC3339 string")
    77  		}
    78  
    79  		asInt64 = parsed.UnixNano()
    80  
    81  	case time.Time:
    82  		asInt64 = t.UnixNano()
    83  
    84  	default:
    85  		return nil, fmt.Errorf("expected value to be time.Time (or parseable string)"+
    86  			", got %T", in)
    87  	}
    88  
    89  	return LexicographicallySortableInt64(asInt64)
    90  }