mapper-json-c

> 用于将json数据根据指定实例格式化 npm i mapper-json-c

装饰器

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赋值装饰器，将json中的属性赋值给class中定义的对应属性
``typescript
class TestEntity {
// str => str
@JsonProperty()
str: string = undefined;

// str1 => str1
@JsonProperty('str1')
str1: string = undefined;

// str1 => str2
@JsonProperty('str1')
str2: string = undefined;

// obj = TestEntity => obj
@JsonProperty({ name: 'obj', clazz: TestEntity })
obj: TestEntity = void 0;
}
`

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转义装饰器，将json中的对象属性拆分key-value后赋值给class中定义的对应属性
`typescript
class TestEntity {
// {key1:value1,key2:value2} => [{label:key1,value:value1},{label:key2,value:value2}]
@ObjectEntriesProperty()
objArr1: {label:string,value:string}[] = [];

// {key1:value1,key2:value2} => [{myLabel:key1,myValue:value1},{myLabel:key2,myValue:value2}]
@ObjectEntriesProperty(['myLabel','myValue'])
objArr2: {label:string,value:string}[] = [];
}
`

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String类型锁装饰器，锁定属性类型为String
`typescript
class TestEntity {
// 'number', 'boolean', 'bigint' 会被转为string
// 其他的设置为空字符串
@LockString()
str: string = undefined;

// 'number', 'boolean', 'bigint' 会被转为string
// object,array 会被设置为JSON字符串
// 其他的设置为空字符串
@LockString('json')
str1: string = undefined;


// undefined, null 转为空字符串
// 其他数据强制执行String()方法
@LockString('force')
str2: string = undefined;

// 所有数据强制执行String()方法
@LockString('forceAll')
str3: string = void 0;
}
`

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Number类型锁装饰器，锁定属性类型为Number
`typescript
class TestEntity {
// 'number', 'boolean'类型会转为数字，其他类型的会被设置为undefined
@LockNumber()
num: number = undefined;

// 'number', 'boolean'类型会转为bigint，其他类型的会被设置为undefined
@LockNumber('bigint')
str2: string = undefined;
}
`

使用示例

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`
class TestEntity {
@JsonProperty('num')
num: number = undefined;

@JsonProperty()
str: string = undefined;

@JsonProperty()
bool: boolean = false;

@JsonProperty()
arr: [] = undefined;

@JsonProperty()
obj: {} = undefined;

@JsonProperty({ name: 'me', clazz: TestEntity })
me: TestEntity = void 0;

@JsonProperty({ clazz: TestEntity })
me1: TestEntity = void 0;

@JsonProperty({ name: 'me', clazz: TestEntity })
me2: TestEntity = void 0;

@LockNumber()
num1: number = void 0;

@LockString()
str1: string = void 0;

@JsonProperty({ name: 'meArr', clazz: TestEntity })
meArr: TestEntity[] = [];

@ObjectEntriesProperty()
objArr1: {label:string,value:string}[] = [];

@ObjectEntriesProperty(['label','value'])
objArr2: {label:string,value:string}[] = [];

// 先转换属性名称，再转格式
@ObjectEntriesProperty(['label','value'])
@JsonProperty('objArr0')
objArr3: {label:string,value:string}[] = [];
}
`

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`
const json = {
num: 1,
str: 'strin',
bool: false,
arr: [{test: 1}],
obj: { a: 1 },
me: { num: 0 },
me1: { num: 1 },
me2: { num: 2 },
me3: { num: 3 },
num1: '1',
str1: 2,
meArr: [{}],
objArr1: {1:'v11',2:'v22'},
objArr2: {1:'v11',2:'v22'},
objArr0: {1:'v11',2:'v22'},
undefindKey: '1',
}
`

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`
mapperJsonC(json, TestEntity)
`

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`
TestEntity {
num: 1,
str: 'strin',
bool: false,
arr: [{test: 1}],
obj: { a: 1 },
me: {
num: 0,
str: undefined,
bool: undefined,
arr: undefined,
obj: undefined,
me: undefined,
me1: undefined,
me2: undefined,
num1: undefined,
str1: '',
meArr: [],
objArr1: [],
objArr2: [],
objArr3: [],
},
me1: {
num: 1,
str: undefined,
bool: undefined,
arr: undefined,
obj: undefined,
me: undefined,
me1: undefined,
me2: undefined,
num1: undefined,
str1: '',
meArr: [],
objArr1: [],
objArr2: [],
objArr3: [],
},
me2: {
num: 0,
str: undefined,
bool: undefined,
arr: undefined,
obj: undefined,
me: undefined,
me1: undefined,
me2: undefined,
num1: undefined,
str1: '',
meArr: [],
objArr1: [],
objArr2: [],
objArr3: [],
},
num1: 1,
str1: '2',
meArr: [{
num: undefined,
str: undefined,
bool: undefined,
arr: undefined,
obj: undefined,
me: undefined,
me1: undefined,
me2: undefined,
num1: undefined,
str1: '',
meArr: [],
objArr1: [],
objArr2: [],
objArr3: [],
}],
objArr1: [['1','v11'],['2','v22']],
objArr2: [{label:'1',value:'v11'},{label:'2',value:'v22'}],
objArr3: [{label:'1',value:'v11'},{label:'2',value:'v22'}],
}

``

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