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Copy pathgutil.go
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146 lines (138 loc) · 3.85 KB
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// Copyright 2017 gf Author(https://github.com/gogf/gf). All Rights Reserved.
//
// This Source Code Form is subject to the terms of the MIT License.
// If a copy of the MIT was not distributed with this file,
// You can obtain one at https://github.com/gogf/gf.
// Package gutil provides utility functions.
package gutil
import (
"fmt"
"github.com/gogf/gf/internal/empty"
"github.com/gogf/gf/util/gconv"
"reflect"
)
// Throw throws out an exception, which can be caught be TryCatch or recover.
func Throw(exception interface{}) {
panic(exception)
}
// Try implements try... logistics using internal panic...recover.
// It returns error if any exception occurs, or else it returns nil.
func Try(try func()) (err error) {
defer func() {
if e := recover(); e != nil {
err = fmt.Errorf(`%v`, e)
}
}()
try()
return
}
// TryCatch implements try...catch... logistics using internal panic...recover.
// It automatically calls function <catch> if any exception occurs ans passes the exception as an error.
func TryCatch(try func(), catch ...func(exception error)) {
defer func() {
if e := recover(); e != nil && len(catch) > 0 {
catch[0](fmt.Errorf(`%v`, e))
}
}()
try()
}
// IsEmpty checks given <value> empty or not.
// It returns false if <value> is: integer(0), bool(false), slice/map(len=0), nil;
// or else returns true.
func IsEmpty(value interface{}) bool {
return empty.IsEmpty(value)
}
// Keys retrieves and returns the keys from given map or struct.
func Keys(mapOrStruct interface{}) (keysOrAttrs []string) {
keysOrAttrs = make([]string, 0)
if m, ok := mapOrStruct.(map[string]interface{}); ok {
for k, _ := range m {
keysOrAttrs = append(keysOrAttrs, k)
}
return
}
var (
reflectValue reflect.Value
reflectKind reflect.Kind
)
if v, ok := mapOrStruct.(reflect.Value); ok {
reflectValue = v
} else {
reflectValue = reflect.ValueOf(mapOrStruct)
}
reflectKind = reflectValue.Kind()
if reflectKind == reflect.Ptr {
if !reflectValue.IsValid() || reflectValue.IsNil() {
reflectValue = reflect.New(reflectValue.Type().Elem()).Elem()
reflectKind = reflectValue.Kind()
}
}
for reflectKind == reflect.Ptr {
reflectValue = reflectValue.Elem()
reflectKind = reflectValue.Kind()
}
switch reflectKind {
case reflect.Map:
for _, k := range reflectValue.MapKeys() {
keysOrAttrs = append(keysOrAttrs, gconv.String(k.Interface()))
}
case reflect.Struct:
var (
fieldType reflect.StructField
reflectType = reflectValue.Type()
)
for i := 0; i < reflectValue.NumField(); i++ {
fieldType = reflectType.Field(i)
if fieldType.Anonymous {
keysOrAttrs = append(keysOrAttrs, Keys(reflectValue.Field(i))...)
} else {
keysOrAttrs = append(keysOrAttrs, fieldType.Name)
}
}
}
return
}
// Values retrieves and returns the values from given map or struct.
func Values(mapOrStruct interface{}) (values []interface{}) {
values = make([]interface{}, 0)
if m, ok := mapOrStruct.(map[string]interface{}); ok {
for _, v := range m {
values = append(values, v)
}
return
}
var (
reflectValue reflect.Value
reflectKind reflect.Kind
)
if v, ok := mapOrStruct.(reflect.Value); ok {
reflectValue = v
} else {
reflectValue = reflect.ValueOf(mapOrStruct)
}
reflectKind = reflectValue.Kind()
for reflectKind == reflect.Ptr {
reflectValue = reflectValue.Elem()
reflectKind = reflectValue.Kind()
}
switch reflectKind {
case reflect.Map:
for _, k := range reflectValue.MapKeys() {
values = append(values, reflectValue.MapIndex(k).Interface())
}
case reflect.Struct:
var (
fieldType reflect.StructField
reflectType = reflectValue.Type()
)
for i := 0; i < reflectValue.NumField(); i++ {
fieldType = reflectType.Field(i)
if fieldType.Anonymous {
values = append(values, Values(reflectValue.Field(i))...)
} else {
values = append(values, reflectValue.Field(i).Interface())
}
}
}
return
}