fix: process null values

packages/abstractions/src/serialization/parseNode.ts

@@ -20,7 +20,7 @@ export interface ParseNode {
 	 * Gets the string value of the node.
 	 * @return the string value of the node.
 	 */
-	getStringValue(): string | undefined;
+	getStringValue(): string | null | undefined;
 	/**
 	 * Gets a new parse node for the given identifier.
 	 * @param identifier the identifier of the current node property.
@@ -31,12 +31,12 @@ export interface ParseNode {
 	 * Gets the boolean value of the node.
 	 * @return the boolean value of the node.
 	 */
-	getBooleanValue(): boolean | undefined;
+	getBooleanValue(): boolean | null | undefined;
 	/**
 	 * Gets the Number value of the node.
 	 * @return the Number value of the node.
 	 */
-	getNumberValue(): number | undefined;
+	getNumberValue(): number | null | undefined;
 	/**
 	 * Gets the Guid value of the node.
 	 * @return the Guid value of the node.

packages/abstractions/src/serialization/serializationWriter.ts

@@ -25,19 +25,19 @@ export interface SerializationWriter {
 	 * @param key the key to write the value with.
 	 * @param value the value to write to the stream.
 	 */
-	writeStringValue(key?: string | undefined, value?: string | undefined): void;
+	writeStringValue(key?: string | undefined, value?: string | null | undefined): void;
 	/**
 	 * Writes the specified boolean value to the stream with an optional given key.
 	 * @param key the key to write the value with.
 	 * @param value the value to write to the stream.
 	 */
-	writeBooleanValue(key?: string | undefined, value?: boolean | undefined): void;
+	writeBooleanValue(key?: string | undefined, value?: boolean | null | undefined): void;
 	/**
 	 * Writes the specified number value to the stream with an optional given key.
 	 * @param key the key to write the value with.
 	 * @param value the value to write to the stream.
 	 */
-	writeNumberValue(key?: string | undefined, value?: number | undefined): void;
+	writeNumberValue(key?: string | undefined, value?: number | null | undefined): void;
 	/**
 	 * Writes the specified Guid value to the stream with an optional given key.
 	 * @param key the key to write the value with.

packages/serialization/json/src/jsonParseNode.ts

@@ -11,10 +11,10 @@ export class JsonParseNode implements ParseNode {
 	constructor(private readonly _jsonNode: unknown) {}
 	public onBeforeAssignFieldValues: ((value: Parsable) => void) | undefined;
 	public onAfterAssignFieldValues: ((value: Parsable) => void) | undefined;
-	public getStringValue = () => (typeof this._jsonNode === "string" ? (this._jsonNode as string) : undefined);
+	public getStringValue = () => (typeof this._jsonNode === "string" || this._jsonNode == null  ? this._jsonNode : undefined);
 	public getChildNode = (identifier: string): ParseNode | undefined => (this._jsonNode && typeof this._jsonNode === "object" && (this._jsonNode as { [key: string]: any })[identifier] !== undefined ? new JsonParseNode((this._jsonNode as { [key: string]: any })[identifier]) : undefined);
-	public getBooleanValue = () => (typeof this._jsonNode === "boolean" ? (this._jsonNode as boolean) : undefined);
-	public getNumberValue = () => (typeof this._jsonNode === "number" ? (this._jsonNode as number) : undefined);
+	public getBooleanValue = () => (typeof this._jsonNode === "boolean" || this._jsonNode == null  ? this._jsonNode : undefined);
+	public getNumberValue = () => (typeof this._jsonNode === "number" || this._jsonNode == null  ? this._jsonNode : undefined);
 	public getGuidValue = () => parseGuidString(this.getStringValue());
 	public getDateValue = () => (this._jsonNode ? new Date(this._jsonNode as string) : undefined);
 	public getDateOnlyValue = () => DateOnly.parse(this.getStringValue());

packages/serialization/json/src/jsonSerializationWriter.ts

@@ -22,29 +22,53 @@ export class JsonSerializationWriter implements SerializationWriter {
 	public onBeforeObjectSerialization: ((value: Parsable) => void) | undefined;
 	public onAfterObjectSerialization: ((value: Parsable) => void) | undefined;
 	public onStartObjectSerialization: ((value: Parsable, writer: SerializationWriter) => void) | undefined;
-	public writeStringValue = (key?: string, value?: string): void => {
-		if (value !== null && value !== undefined) {
-			key && this.writePropertyName(key);
-			this.writer.push(JSON.stringify(value));
-			key && this.writer.push(JsonSerializationWriter.propertySeparator);
+	public writeStringValue = (key?: string, value?: string | null): void => {
+		if (value === undefined) {
+			return;
+		}
+
+		if (value === null) {
+			key && this.writeNullValue(key);
+
+			return;
 		}
+
+		key && this.writePropertyName(key);
+		this.writer.push(JSON.stringify(value));
+		key && this.writer.push(JsonSerializationWriter.propertySeparator);
 	};
 	private writePropertyName = (key: string): void => {
 		this.writer.push(`"${key}":`);
 	};
 	public writeBooleanValue = (key?: string, value?: boolean): void => {
-		if (value !== null && value !== undefined) {
-			key && this.writePropertyName(key);
-			this.writer.push(`${value}`);
-			key && this.writer.push(JsonSerializationWriter.propertySeparator);
+		if (value === undefined) {
+			return;
+		}
+
+		if (value === null) {
+			key && this.writeNullValue(key);
+
+			return;
 		}
+
+		key && this.writePropertyName(key);
+		this.writer.push(`${value}`);
+		key && this.writer.push(JsonSerializationWriter.propertySeparator);
 	};
 	public writeNumberValue = (key?: string, value?: number): void => {
-		if (value !== null && value !== undefined) {
-			key && this.writePropertyName(key);
-			this.writer.push(`${value}`);
-			key && this.writer.push(JsonSerializationWriter.propertySeparator);
+		if (value === undefined) {
+			return;
 		}
+
+		if (value === null) {
+			key && this.writeNullValue(key);
+
+			return;
+		}
+
+		key && this.writePropertyName(key);
+		this.writer.push(`${value}`);
+		key && this.writer.push(JsonSerializationWriter.propertySeparator);
 	};
 	public writeGuidValue = (key?: string, value?: Guid): void => {
 		if (value) {