If you're interested in learning more about JSON, consider visiting json.org for a concise overview.
To summarize:
- objects (key-value pairs, acting as associative arrays)
- arrays (lists of values)
- strings
- numbers
- true
- false
- null
It's worth noting that JSON does not include functions in its list of supported data types.
If you need to work with functions, you may need to explore alternative solutions like the one suggested in another answer.
Although I'm not familiar with TypeScript, the following JavaScript example might provide some insight:
class UserObject{
constructor(name,id){
this.name=name;
this.id=id;
}
validateInsert(){
return this.name.length>0 && this.id!=0;
}
}
var originalUser=new UserObject("tevemadar",123);
console.log("original:",originalUser.name,originalUser.id,originalUser.validateInsert());
var json=JSON.stringify(originalUser);
console.log("json:",json);
var failUser=JSON.parse(json);
try{
console.log("fail:",failUser.name,failUser.id,failUser.validateInsert());
}catch(ex){
console.log("failUser failed:",ex.toString());
}
var correctUser=JSON.parse(json,function(key,value){
if(typeof value==='object')
return Object.assign(new UserObject,value);
return value;
});
try{
console.log("correctUser:",correctUser.name,correctUser.id,correctUser.validateInsert());
}catch(ex){
console.log("correctUser failed:",ex);
}
JSON.parse also offers an optional second argument for transformations on restored data from JSON. In the 'correctUser' portion of the example above, every object is checked and converted to a UserObject if necessary using Object.assign. Similar techniques may be required in TypeScript due to the limitations of type assertions.
The key challenge lies in distinguishing between different classes when handling objects, ensuring proper conversion based on their specific attributes.