功能：model = modelType.transform(rawdata)
使用分析：
使用机制：继承+实现配置+使用；
需要自己实现什么？
设计分析：
工具模块？机制模块？model基类？
生成机制？
如何组织？
接口：通过继承使用接口；
主干类：
JSONDeserializer<T: HandyJSON>
HandyJSON: _ExtendCustomModelType: _Transformable: _Measurable
_ExtendCustomModelType
mutating func mapping(mapper: HelpingMapper)
mutating func didFinishMapping()
_Transformable
transform(from object: Any) -> Self?
_Measurable
headPointerOfStruct() -> UnsafeMutablePointer<Byte>
问题分解：
1、遍历rawdata对model赋值；
2、赋值解决方案，前提条件：无法获取成员变量的内存引用；
解决方案：kvc赋值（不支持）、根据内存对齐规则直接对内存赋值；
3、对象内存模型信息提取；
4、复杂赋值要处理的情况：
（1）rawdata引用与目标变量名称不一致；
（2）rawdata引用与目标变量路径不一致；
（3）rawdata引用与目标变量类型不一致；
static func _transform(dict: [String: Any], to instance: inout Self) {
guard let properties = getProperties(forType: Self.self) else {
InternalLogger.logDebug("Failed when try to get properties from type: \(type(of: Self.self))")
return
}
// do user-specified mapping first
let mapper = HelpingMapper()
instance.mapping(mapper: mapper)
// get head addr
let rawPointer = instance.headPointer()
InternalLogger.logVerbose("instance start at: ", Int(bitPattern: rawPointer))
// process dictionary
let _dict = convertKeyIfNeeded(dict: dict)
let instanceIsNsObject = instance.isNSObjectType()
let bridgedPropertyList = instance.getBridgedPropertyList()
for property in properties {
let isBridgedProperty = instanceIsNsObject && bridgedPropertyList.contains(property.key)
let propAddr = rawPointer.advanced(by: property.offset)
InternalLogger.logVerbose(property.key, "address at: ", Int(bitPattern: propAddr))
if mapper.propertyExcluded(key: Int(bitPattern: propAddr)) {
InternalLogger.logDebug("Exclude property: \(property.key)")
continue
}
let propertyDetail = PropertyInfo(key: property.key, type: property.type, address: propAddr, bridged: isBridgedProperty)
InternalLogger.logVerbose("field: ", property.key, " offset: ", property.offset, " isBridgeProperty: ", isBridgedProperty)
if let rawValue = getRawValueFrom(dict: _dict, property: propertyDetail, mapper: mapper) {
if let convertedValue = convertValue(rawValue: rawValue, property: propertyDetail, mapper: mapper) {
assignProperty(convertedValue: convertedValue, instance: instance, property: propertyDetail)
continue
}
}
InternalLogger.logDebug("Property: \(property.key) hasn't been written in")
}
}
