sortorder

package
v3.2.7+incompatible Latest Latest
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 Go to latest Published: Apr 28, 2021 License: Apache-2.0, MIT Imports: 7 Imported by: 0

Documentation

Overview

Copyright 2019 The Vearch Authors.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at 

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Copyright 2019 The Vearch Authors.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at 

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Copyright 2019 The Vearch Authors.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at 

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Copyright 2019 The Vearch Authors.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at 

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Index

Constants

This section is empty.

Variables

View Source 
var NegativeInfinity *big.Int
View Source 
var PositiveInfinity *big.Int

Functions

func SelectKMin 

func SelectKMin(s []float64, k int) []float64

选出k个最小元素，k为1~len(s)

func SelectKthMin 

func SelectKthMin(s []float64, k int) float64

func SelectMid 

func SelectMid(s []float64) float64

选出中位数（比一半的元素小，比另一半的大）

Types

type DateSortValue 

type DateSortValue struct {
	Val time.Time
}

func (*DateSortValue) Compare 

func (sv *DateSortValue) Compare(other SortValue) int

func (*DateSortValue) Value 

func (sv *DateSortValue) Value() interface{}

type FloatSortValue 

type FloatSortValue struct {
	Val      float64
	SortName string
}

func (*FloatSortValue) Compare 

func (sv *FloatSortValue) Compare(other SortValue) int

func (*FloatSortValue) Value 

func (sv *FloatSortValue) Value() interface{}

type GeoDistanceSortValue 

type GeoDistanceSortValue struct {
	Val  float64
	Unit string
}

func (*GeoDistanceSortValue) Compare 

func (sv *GeoDistanceSortValue) Compare(other SortValue) int

func (*GeoDistanceSortValue) Value 

func (sv *GeoDistanceSortValue) Value() interface{}

type InfinitySortValue 

type InfinitySortValue struct {
	Typ      ValueType
	Negative bool
}

func (*InfinitySortValue) Compare 

func (sv *InfinitySortValue) Compare(other SortValue) int

func (*InfinitySortValue) Value 

func (sv *InfinitySortValue) Value() interface{}

type IntSortValue 

type IntSortValue struct {
	Val      int64
	SortName string
}

func (*IntSortValue) Compare 

func (sv *IntSortValue) Compare(other SortValue) int

func (*IntSortValue) Value 

func (sv *IntSortValue) Value() interface{}

type Sort 

type Sort interface {
	Compare(i, j SortValue) int
	SortField() string
	GetSortOrder() bool
}

type SortDoc 

type SortDoc struct {
}

func (*SortDoc) Compare 

func (s *SortDoc) Compare(i, j interface{}) int

func (*SortDoc) SortField 

func (s *SortDoc) SortField() string

type SortField 

type SortField struct {
	Field        string
	Desc         bool
	Mode         SortFieldMode
	Missing      SortFieldMissing
	MissingValue interface{}
	// contains filtered or unexported fields
}

func NewSortField 

func NewSortField(field string) *SortField

func (*SortField) Compare 

func (s *SortField) Compare(i, j SortValue) int

If i < j return -1; if i == j return 0; if i > j return 1

func (*SortField) GetSortOrder 

func (s *SortField) GetSortOrder() bool

func (*SortField) SetMissing 

func (s *SortField) SetMissing(missingMode SortFieldMissing, missingValue interface{})

func (*SortField) SetMode 

func (s *SortField) SetMode(mode SortFieldMode)

func (*SortField) SetOrder 

func (s *SortField) SetOrder(desc bool)

func (*SortField) SortField 

func (s *SortField) SortField() string

type SortFieldMissing 

type SortFieldMissing int

SortFieldMissing controls where documents missing a field value should be sorted 

const (
	// SortFieldMissingLast sorts documents missing a field at the end
	SortFieldMissingLast SortFieldMissing = iota

	// SortFieldMissingFirst sorts documents missing a field at the beginning
	SortFieldMissingFirst

	// SortFieldMissingCustom sorts documents missing a field with a custom value
	SortFieldMissingCustom
)

type SortFieldMode 

type SortFieldMode int

SortFieldMode describes the behavior if the field has multiple values 

const (
	// SortFieldDefault uses the first (or only) value, this is the default zero-value
	SortFieldDefault SortFieldMode = iota // FIXME name is confusing
	// SortFieldMin uses the minimum value
	SortFieldMin
	// SortFieldMax uses the maximum value
	SortFieldMax
	// Use the sum of all values as sort value. Only applicable for number based array fields.
	SortFieldSum
	// Use the average of all values as sort value. Only applicable for number based array fields.
	SortFieldAvg
	// Use the median of all values as sort value. Only applicable for number based array fields.
	SortFieldMedian
)

type SortOrder 

type SortOrder []Sort

func ParseSort 

func ParseSort(bytes []byte) (SortOrder, error)

func (SortOrder) Compare 

func (so SortOrder) Compare(a, b SortValues) int

Compare will compare two document matches using the specified sort order if both are numbers, we avoid converting back to term

type SortScore 

type SortScore struct {
	Desc bool
}

func (*SortScore) Compare 

func (s *SortScore) Compare(i, j SortValue) int

func (*SortScore) GetSortOrder 

func (s *SortScore) GetSortOrder() bool

func (*SortScore) SortField 

func (s *SortScore) SortField() string

type SortValue 

type SortValue interface {
	Value() interface{}
	Compare(SortValue) int
}

type SortValues 

type SortValues []SortValue

func (SortValues) Len 

func (svs SortValues) Len() int

func (SortValues) Less 

func (svs SortValues) Less(i, j int) bool

func (SortValues) Reset 

func (vs SortValues) Reset() SortValues

func (SortValues) Swap 

func (svs SortValues) Swap(i, j int)

Swap swaps the elements with indexes i and j.

func (SortValues) Values 

func (vs SortValues) Values() []interface{}

type StringSortValue 

type StringSortValue struct {
	Val      string
	SortName string
}

func (*StringSortValue) Compare 

func (sv *StringSortValue) Compare(other SortValue) int

func (*StringSortValue) Type 

func (sv *StringSortValue) Type() ValueType

func (*StringSortValue) Value 

func (sv *StringSortValue) Value() interface{}

type ValueType 

type ValueType int
const (
	ValueType_Null ValueType = iota
	ValueType_String
	ValueType_Int
	ValueType_Float
	ValueType_Bool
	ValueType_Date
)

Source Files

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