stretchr/objx

package objx

import (
    "fmt"
    "strconv"
)

// Value provides methods for extracting interface{} data in various
// types.
type Value struct {
    // data contains the raw data being managed by this Value
    data interface{}
}

// Data returns the raw data contained by this Value
func (v *Value) Data() interface{} {
    return v.data
}

// String returns the value always as a string
func (v *Value) String() string {
    switch {
    case v.IsNil():
        return ""
    case v.IsStr():
        return v.Str()
    case v.IsBool():
        return strconv.FormatBool(v.Bool())
    case v.IsFloat32():
        return strconv.FormatFloat(float64(v.Float32()), 'f', -1, 32)
    case v.IsFloat64():
        return strconv.FormatFloat(v.Float64(), 'f', -1, 64)
    case v.IsInt():
        return strconv.FormatInt(int64(v.Int()), 10)
    case v.IsInt8():
        return strconv.FormatInt(int64(v.Int8()), 10)
    case v.IsInt16():
        return strconv.FormatInt(int64(v.Int16()), 10)
    case v.IsInt32():
        return strconv.FormatInt(int64(v.Int32()), 10)
    case v.IsInt64():
        return strconv.FormatInt(v.Int64(), 10)
    case v.IsUint():
        return strconv.FormatUint(uint64(v.Uint()), 10)
    case v.IsUint8():
        return strconv.FormatUint(uint64(v.Uint8()), 10)
    case v.IsUint16():
        return strconv.FormatUint(uint64(v.Uint16()), 10)
    case v.IsUint32():
        return strconv.FormatUint(uint64(v.Uint32()), 10)
    case v.IsUint64():
        return strconv.FormatUint(v.Uint64(), 10)
    }
    return fmt.Sprintf("%#v", v.Data())
}

// StringSlice returns the value always as a []string
func (v *Value) StringSlice(optionalDefault ...[]string) []string {
    switch {
    case v.IsStrSlice():
        return v.MustStrSlice()
    case v.IsBoolSlice():
        slice := v.MustBoolSlice()
        vals := make([]string, len(slice))
        for i, iv := range slice {
            vals[i] = strconv.FormatBool(iv)
        }
        return vals
    case v.IsFloat32Slice():
        slice := v.MustFloat32Slice()
        vals := make([]string, len(slice))
        for i, iv := range slice {
            vals[i] = strconv.FormatFloat(float64(iv), 'f', -1, 32)
        }
        return vals
    case v.IsFloat64Slice():
        slice := v.MustFloat64Slice()
        vals := make([]string, len(slice))
        for i, iv := range slice {
            vals[i] = strconv.FormatFloat(iv, 'f', -1, 64)
        }
        return vals
    case v.IsIntSlice():
        slice := v.MustIntSlice()
        vals := make([]string, len(slice))
        for i, iv := range slice {
            vals[i] = strconv.FormatInt(int64(iv), 10)
        }
        return vals
    case v.IsInt8Slice():
        slice := v.MustInt8Slice()
        vals := make([]string, len(slice))
        for i, iv := range slice {
            vals[i] = strconv.FormatInt(int64(iv), 10)
        }
        return vals
    case v.IsInt16Slice():
        slice := v.MustInt16Slice()
        vals := make([]string, len(slice))
        for i, iv := range slice {
            vals[i] = strconv.FormatInt(int64(iv), 10)
        }
        return vals
    case v.IsInt32Slice():
        slice := v.MustInt32Slice()
        vals := make([]string, len(slice))
        for i, iv := range slice {
            vals[i] = strconv.FormatInt(int64(iv), 10)
        }
        return vals
    case v.IsInt64Slice():
        slice := v.MustInt64Slice()
        vals := make([]string, len(slice))
        for i, iv := range slice {
            vals[i] = strconv.FormatInt(iv, 10)
        }
        return vals
    case v.IsUintSlice():
        slice := v.MustUintSlice()
        vals := make([]string, len(slice))
        for i, iv := range slice {
            vals[i] = strconv.FormatUint(uint64(iv), 10)
        }
        return vals
    case v.IsUint8Slice():
        slice := v.MustUint8Slice()
        vals := make([]string, len(slice))
        for i, iv := range slice {
            vals[i] = strconv.FormatUint(uint64(iv), 10)
        }
        return vals
    case v.IsUint16Slice():
        slice := v.MustUint16Slice()
        vals := make([]string, len(slice))
        for i, iv := range slice {
            vals[i] = strconv.FormatUint(uint64(iv), 10)
        }
        return vals
    case v.IsUint32Slice():
        slice := v.MustUint32Slice()
        vals := make([]string, len(slice))
        for i, iv := range slice {
            vals[i] = strconv.FormatUint(uint64(iv), 10)
        }
        return vals
    case v.IsUint64Slice():
        slice := v.MustUint64Slice()
        vals := make([]string, len(slice))
        for i, iv := range slice {
            vals[i] = strconv.FormatUint(iv, 10)
        }
        return vals
    }
    if len(optionalDefault) == 1 {
        return optionalDefault[0]
    }

    return []string{}
}