145 lines
4.0 KiB
Go
145 lines
4.0 KiB
Go
// Copyright The OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package label // import "go.opentelemetry.io/otel/label"
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import (
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"encoding/json"
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"fmt"
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"reflect"
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)
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// KeyValue holds a key and value pair.
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type KeyValue struct {
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Key Key
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Value Value
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}
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// Bool creates a new key-value pair with a passed name and a bool
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// value.
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func Bool(k string, v bool) KeyValue {
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return Key(k).Bool(v)
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}
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// Int64 creates a new key-value pair with a passed name and an int64
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// value.
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func Int64(k string, v int64) KeyValue {
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return Key(k).Int64(v)
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}
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// Uint64 creates a new key-value pair with a passed name and a uint64
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// value.
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func Uint64(k string, v uint64) KeyValue {
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return Key(k).Uint64(v)
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}
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// Float64 creates a new key-value pair with a passed name and a float64
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// value.
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func Float64(k string, v float64) KeyValue {
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return Key(k).Float64(v)
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}
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// Int32 creates a new key-value pair with a passed name and an int32
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// value.
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func Int32(k string, v int32) KeyValue {
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return Key(k).Int32(v)
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}
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// Uint32 creates a new key-value pair with a passed name and a uint32
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// value.
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func Uint32(k string, v uint32) KeyValue {
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return Key(k).Uint32(v)
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}
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// Float32 creates a new key-value pair with a passed name and a float32
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// value.
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func Float32(k string, v float32) KeyValue {
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return Key(k).Float32(v)
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}
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// String creates a new key-value pair with a passed name and a string
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// value.
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func String(k, v string) KeyValue {
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return Key(k).String(v)
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}
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// Stringer creates a new key-value pair with a passed name and a string
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// value generated by the passed Stringer interface.
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func Stringer(k string, v fmt.Stringer) KeyValue {
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return Key(k).String(v.String())
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}
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// Int creates a new key-value pair instance with a passed name and
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// either an int32 or an int64 value, depending on whether the int
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// type is 32 or 64 bits wide.
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func Int(k string, v int) KeyValue {
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return Key(k).Int(v)
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}
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// Uint creates a new key-value pair instance with a passed name and
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// either an uint32 or an uint64 value, depending on whether the uint
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// type is 32 or 64 bits wide.
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func Uint(k string, v uint) KeyValue {
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return Key(k).Uint(v)
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}
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// Array creates a new key-value pair with a passed name and a array.
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// Only arrays of primitive type are supported.
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func Array(k string, v interface{}) KeyValue {
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return Key(k).Array(v)
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}
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// Any creates a new key-value pair instance with a passed name and
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// automatic type inference. This is slower, and not type-safe.
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func Any(k string, value interface{}) KeyValue {
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if value == nil {
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return String(k, "<nil>")
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}
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if stringer, ok := value.(fmt.Stringer); ok {
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return String(k, stringer.String())
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}
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rv := reflect.ValueOf(value)
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switch rv.Kind() {
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case reflect.Array, reflect.Slice:
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return Array(k, value)
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case reflect.Bool:
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return Bool(k, rv.Bool())
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case reflect.Int, reflect.Int8, reflect.Int16:
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return Int(k, int(rv.Int()))
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case reflect.Int32:
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return Int32(k, int32(rv.Int()))
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case reflect.Int64:
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return Int64(k, int64(rv.Int()))
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case reflect.Uint, reflect.Uint8, reflect.Uint16:
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return Uint(k, uint(rv.Uint()))
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case reflect.Uint32:
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return Uint32(k, uint32(rv.Uint()))
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case reflect.Uint64, reflect.Uintptr:
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return Uint64(k, rv.Uint())
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case reflect.Float32:
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return Float32(k, float32(rv.Float()))
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case reflect.Float64:
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return Float64(k, rv.Float())
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case reflect.String:
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return String(k, rv.String())
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}
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if b, err := json.Marshal(value); b != nil && err == nil {
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return String(k, string(b))
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}
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return String(k, fmt.Sprint(value))
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}
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