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85 lines
1.8 KiB
85 lines
1.8 KiB
/**
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* 枚举类
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* Enum.IMAGE.name => "图片"
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* Enum.getNameByKey('IMAGE') => "图片"
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* Enum.getValueByKey('IMAGE') => 10
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* Enum.getNameByValue(10) => "图片"
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* Enum.getData() => [{key: "IMAGE", name: "图片", value: 10}]
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*/
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class Enum {
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constructor (param) {
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const keyArr = []
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const valueArr = []
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if (!Array.isArray(param)) {
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throw new Error('param is not an array!')
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}
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param.map(element => {
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if (!element.key || !element.name) {
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return
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}
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// 保存key值组成的数组，方便A.getName(name)类型的调用
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keyArr.push(element.key)
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valueArr.push(element.value)
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// 根据key生成不同属性值，以便A.B.name类型的调用
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this[element.key] = element
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if (element.key !== element.value) {
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this[element.value] = element
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}
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})
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// 保存源数组
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this.data = param
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this.keyArr = keyArr
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this.valueArr = valueArr
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// 防止被修改
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// Object.freeze(this)
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}
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// 根据key得到对象
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keyOf (key) {
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return this.data[this.keyArr.indexOf(key)]
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}
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// 根据key得到对象
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valueOf (key) {
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return this.data[this.valueArr.indexOf(key)]
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}
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// 根据key获取name值
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getNameByKey (key) {
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const prop = this.keyOf(key)
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if (!prop) {
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throw new Error('No enum constant' + key)
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}
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return prop.name
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}
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// 根据value获取name值
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getNameByValue (value) {
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const prop = this.valueOf(value)
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if (!prop) {
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throw new Error('No enum constant' + value)
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}
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return prop.name
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}
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// 根据key获取value值
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getValueByKey (key) {
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const prop = this.keyOf(key)
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if (!prop) {
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throw new Error('No enum constant' + key)
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}
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return prop.key
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}
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// 返回源数组
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getData () {
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return this.data
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}
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}
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export default Enum
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