JsonMember's reviver and replacer

js/typed-json.d.ts

@@ -45,6 +45,10 @@ interface JsonObjectOptions<T> {
     serializer?: (object: T) => any;
     /** A custom deserializer function transforming a JSON object to an instace. */
     initializer?: (json: any) => T;
+    /** A function that transforms the JSON after serializing. */
+    replacer?: (key: string, value: any) => any;
+    /** A function that transforms the JSON before deserializing. */
+    reviver?: (key: any, value: any) => any;
 }
 /**
  * Specifies that the type is serializable to and deserializable from a JSON string.
@@ -76,6 +80,10 @@ interface JsonMemberOptions<TFunction extends Function> {
     emitDefaultValue?: boolean;
     /** When set, type-hint is mandatory when deserializing. Set for properties with interface or abstract types/element-types. */
     refersAbstractType?: boolean;
+    /** Will be invoked, with the deserialized value in order to let the member, revive it. */
+    reviver?: (deserializedValue: any) => any;
+    /** Will be invoked, with the serialized value in order to let the member, replace it. */
+    replacer?: (serializedValue: any) => any;
 }
 /**
  * Specifies that the property is part of the object when serializing.

src/tests/test.ts

@@ -0,0 +1,29 @@
+import {isEqual} from "./object-compare";
+import {JsonObject, JsonMember, TypedJSON} from "../typed-json";
+
+@JsonObject
+class Person {
+    @JsonMember({type : String})
+    firstName: string;
+
+    @JsonMember({type : String})
+    lastName: string;
+
+    @JsonMember({type : Number, reviver : value=> value + 5, replacer : value=> value * 10 })
+    level : number
+
+
+    public getFullname() {
+        return this.firstName + " " + this.lastName;
+    }
+}
+
+
+var person = TypedJSON.parse('{ "firstName": "John", "lastName": "Doe", level : 20 }', Person);
+var jsPerson = TypedJSON.stringify(person)
+
+console.log("Pesron Level: ",person.level)
+console.log("jsPerson", jsPerson)
+
+
+

src/typed-json.ts

@@ -315,6 +315,11 @@ class JsonMemberMetadata<T> {
     public order: number;
 
     public forceEnableTypeHinting: boolean;
+
+    /** Will be invoked, with the deserialized value in order to let the member, revive it. */
+    reviver? : (deserializedValue : any)=>any
+    /** Will be invoked, with the serialized value in order to let the member, replace it. */
+    replacer? : (serializedValue : any)=>any
 }
 
 class JsonObjectMetadata<T> {
@@ -567,6 +572,12 @@ interface JsonObjectOptions<T> {
 
     /** A custom deserializer function transforming a JSON object to an instace. */
     initializer?: (json: any) => T;
+
+    /** A function that transforms the JSON after serializing. */
+    replacer?: (key: string, value: any) => any;
+
+    /** A function that transforms the JSON before deserializing. */
+    reviver?: (key: any, value: any) => any;
 }
 
 /**
@@ -687,6 +698,11 @@ interface JsonMemberOptions<TFunction extends Function> {
 
     /** When set, type-hint is mandatory when deserializing. Set for properties with interface or abstract types/element-types. */
     refersAbstractType?: boolean;
+
+    /** Will be invoked, with the deserialized value in order to let the member, revive it. */
+    reviver? : (deserializedValue : any)=>any
+    /** Will be invoked, with the serialized value in order to let the member, replace it. */
+    replacer? : (serializedValue : any)=>any
 }
 
 function jsonMemberTypeInit<T>(metadata: JsonMemberMetadata<T>, propertyName: string, warnArray = false) {
@@ -961,7 +977,7 @@ abstract class Serializer {
                     Object.keys(objectMetadata.dataMembers).forEach(propertyKey => {
                         var propertyMetadata = objectMetadata.dataMembers[propertyKey];
 
-                        json[propertyMetadata.name] = this.writeToJsonObject(object[propertyKey], {
+                        let temp = this.writeToJsonObject(object[propertyKey], {
                             elements: propertyMetadata.elements,
                             emitDefault: propertyMetadata.emitDefaultValue,
                             enableTypeHints: settings.enableTypeHints,
@@ -970,6 +986,12 @@ abstract class Serializer {
                             requireTypeHints: settings.requireTypeHints,
                             typeHintPropertyKey: settings.typeHintPropertyKey
                         });
+
+                        if(propertyMetadata.replacer) {
+                            temp = propertyMetadata.replacer(temp)
+                        }
+
+                        json[propertyMetadata.name] = temp
                     });
                 } else {
                     // Serialize all own properties.
@@ -1187,6 +1209,11 @@ abstract class Deserializer {
                             typeHintPropertyKey: settings.typeHintPropertyKey
                         });
 
+                        if (propertyMetadata.reviver) {
+
+                            temp = propertyMetadata.reviver(temp)
+                        }
+
                         // Do not make undefined/null property assignments.
                         if (Helpers.valueIsDefined(temp)) {
                             object[propertyKey] = temp;