You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
This file contains ambiguous Unicode characters that may be confused with others in your current locale. If your use case is intentional and legitimate, you can safely ignore this warning. Use the Escape button to highlight these characters.
/**
* 枚举类
* Enum.IMAGE.name => "图片"
* Enum.getNameByKey('IMAGE') => "图片"
* Enum.getValueByKey('IMAGE') => 10
* Enum.getNameByValue(10) => "图片"
* Enum.getData() => [{key: "IMAGE", name: "图片", value: 10}]
*/
class Enum {
constructor ( param ) {
const keyArr = [ ]
const valueArr = [ ]
if ( ! Array . isArray ( param ) ) {
throw new Error ( 'param is not an array!' )
}
param . map ( element => {
if ( ! element . key || ! element . name ) {
return
}
// 保存key值组成的数组, 方便A.getName(name)类型的调用
keyArr . push ( element . key )
valueArr . push ( element . value )
// 根据key生成不同属性值, 以便A.B.name类型的调用
this [ element . key ] = element
if ( element . key !== element . value ) {
this [ element . value ] = element
}
} )
// 保存源数组
this . data = param
this . keyArr = keyArr
this . valueArr = valueArr
// 防止被修改
// Object.freeze(this)
}
// 根据key得到对象
keyOf ( key ) {
return this . data [ this . keyArr . indexOf ( key ) ]
}
// 根据key得到对象
valueOf ( key ) {
return this . data [ this . valueArr . indexOf ( key ) ]
}
// 根据key获取name值
getNameByKey ( key ) {
const prop = this . keyOf ( key )
if ( ! prop ) {
throw new Error ( 'No enum constant' + key )
}
return prop . name
}
// 根据value获取name值
getNameByValue ( value ) {
const prop = this . valueOf ( value )
if ( ! prop ) {
throw new Error ( 'No enum constant' + value )
}
return prop . name
}
// 根据key获取value值
getValueByKey ( key ) {
const prop = this . keyOf ( key )
if ( ! prop ) {
throw new Error ( 'No enum constant' + key )
}
return prop . key
}
// 返回源数组
getData ( ) {
return this . data
}
}
export default Enum