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I'm submitting a...

[ ] Regression (a behavior that used to work and stopped working in a new release)
[ ] Bug report  
[ ] Performance issue
[X] Feature request
[ ] Documentation issue or request
[ ] Support request
[ ] Other... Please describe:

Current behavior

Current behavior is fine, but we cannot use a jsonCustomConverter which convert an object depending of a parent.key property.
currently:

@jsonCustomConverter()
export class PidConverter implements JsonCustomConverter<Pid> {

    public deserialize(obj: any): Pid {
        return undefined;
    }

    public serialize(obj: Pid): any {
        return undefined;
    }
}

Expected behavior

Would be great to get the parent of the object to deserialize.
We could deserialize depending on a parent.key property:

@jsonCustomConverter()
export class PidConverter implements JsonCustomConverter<Pid> {

    public deserialize(obj: any, parent?: any): Pid {
        if (parent && parent.property = 'value') {
           return 0;
        }
        return undefined;
    }

    public serialize(obj: Pid): any {
        return undefined;
    }
}

Minimal reproduction of the problem with instructions

What is the motivation / use case for changing the behavior?

To be more flexible

Others:

Thanks you ;)

Provide a property validation like :

@jsonProperty('pid', String, [JsonValidators.required])
private _pid: string;

@jsonProperty('pid', String, [(JsonValidators.required, JsonValidators.regex('regex'), value: string) => value.length > 10])
private _pid: string;

OU

@jsonRequired
@jsonValid(JsonValidators.regex('regex'))
@jsonProperty('pid', String, [JsonValidators.required])
private _pid: string;

I would like to deserialize :
@jsonProperty('key', PropertyPathConverter) protected _key?: (string | number)[];

Provide transient properties by context.

For example I want the field password to be serialized in my database (context database) but not returned by my api (context api)