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100 lines
3.3 KiB
100 lines
3.3 KiB
// Copyright The OpenTelemetry Authors
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// SPDX-License-Identifier: Apache-2.0
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/*
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Package attribute provide several helper functions for some commonly used
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logic of processing attributes.
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*/
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package attribute // import "go.opentelemetry.io/otel/internal/attribute"
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import (
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"reflect"
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)
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// BoolSliceValue converts a bool slice into an array with same elements as slice.
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func BoolSliceValue(v []bool) interface{} {
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var zero bool
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cp := reflect.New(reflect.ArrayOf(len(v), reflect.TypeOf(zero)))
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copy(cp.Elem().Slice(0, len(v)).Interface().([]bool), v)
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return cp.Elem().Interface()
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}
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// Int64SliceValue converts an int64 slice into an array with same elements as slice.
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func Int64SliceValue(v []int64) interface{} {
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var zero int64
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cp := reflect.New(reflect.ArrayOf(len(v), reflect.TypeOf(zero)))
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copy(cp.Elem().Slice(0, len(v)).Interface().([]int64), v)
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return cp.Elem().Interface()
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}
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// Float64SliceValue converts a float64 slice into an array with same elements as slice.
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func Float64SliceValue(v []float64) interface{} {
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var zero float64
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cp := reflect.New(reflect.ArrayOf(len(v), reflect.TypeOf(zero)))
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copy(cp.Elem().Slice(0, len(v)).Interface().([]float64), v)
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return cp.Elem().Interface()
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}
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// StringSliceValue converts a string slice into an array with same elements as slice.
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func StringSliceValue(v []string) interface{} {
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var zero string
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cp := reflect.New(reflect.ArrayOf(len(v), reflect.TypeOf(zero)))
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copy(cp.Elem().Slice(0, len(v)).Interface().([]string), v)
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return cp.Elem().Interface()
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}
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// AsBoolSlice converts a bool array into a slice into with same elements as array.
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func AsBoolSlice(v interface{}) []bool {
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rv := reflect.ValueOf(v)
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if rv.Type().Kind() != reflect.Array {
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return nil
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}
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var zero bool
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correctLen := rv.Len()
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correctType := reflect.ArrayOf(correctLen, reflect.TypeOf(zero))
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cpy := reflect.New(correctType)
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_ = reflect.Copy(cpy.Elem(), rv)
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return cpy.Elem().Slice(0, correctLen).Interface().([]bool)
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}
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// AsInt64Slice converts an int64 array into a slice into with same elements as array.
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func AsInt64Slice(v interface{}) []int64 {
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rv := reflect.ValueOf(v)
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if rv.Type().Kind() != reflect.Array {
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return nil
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}
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var zero int64
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correctLen := rv.Len()
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correctType := reflect.ArrayOf(correctLen, reflect.TypeOf(zero))
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cpy := reflect.New(correctType)
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_ = reflect.Copy(cpy.Elem(), rv)
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return cpy.Elem().Slice(0, correctLen).Interface().([]int64)
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}
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// AsFloat64Slice converts a float64 array into a slice into with same elements as array.
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func AsFloat64Slice(v interface{}) []float64 {
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rv := reflect.ValueOf(v)
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if rv.Type().Kind() != reflect.Array {
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return nil
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}
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var zero float64
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correctLen := rv.Len()
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correctType := reflect.ArrayOf(correctLen, reflect.TypeOf(zero))
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cpy := reflect.New(correctType)
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_ = reflect.Copy(cpy.Elem(), rv)
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return cpy.Elem().Slice(0, correctLen).Interface().([]float64)
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}
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// AsStringSlice converts a string array into a slice into with same elements as array.
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func AsStringSlice(v interface{}) []string {
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rv := reflect.ValueOf(v)
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if rv.Type().Kind() != reflect.Array {
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return nil
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}
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var zero string
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correctLen := rv.Len()
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correctType := reflect.ArrayOf(correctLen, reflect.TypeOf(zero))
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cpy := reflect.New(correctType)
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_ = reflect.Copy(cpy.Elem(), rv)
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return cpy.Elem().Slice(0, correctLen).Interface().([]string)
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}
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