@kephas/core
Version:
Provides a common infrastructure for all the other Kephas Framework components: ambient services, dynamic reflection, composition, application management, and others.
142 lines • 14.7 kB
JavaScript
import 'reflect-metadata';
import { Requires } from '../diagnostics/contracts/requires';
/**
* Base class for serializable objects.
*
* @export
* @abstract
* @class Serializable
*/
export class Serializable {
/**
* Gets or sets the name of the key holding the type's full name.
*
* @static
* @type {string}
* @memberof Serializable
*/
static get TypeFullNameKey() {
return Serializable._typeFullNameKey;
}
static set TypeFullNameKey(value) {
Requires.HasValue(value, 'value');
Serializable._typeFullNameKey = value;
}
/**
* Sets the type name for serialization/deserialization purposes.
*
* @static
* @template T
* @param {AbstractType} type The type where the full name should be set.
* @param {string} typeFullName The type's full name.
*
* @memberOf Serializable
*/
static setTypeFullName(type, typeFullName) {
Requires.HasValue(typeFullName, 'typeFullName');
Reflect.defineMetadata(Serializable._typeFullNameKey, typeFullName, type);
}
/**
* Sets the type namespace for serialization/deserialization purposes.
*
* @static
* @template T
* @param {AbstractType} type The type where the type name should be set.
* @param {string} namespace The type namespace.
*
* @memberOf Serializable
*/
static setTypeNamespace(type, namespace) {
Reflect.defineMetadata(Serializable._typeNamespaceKey, namespace, type);
}
/**
* Gets the type's full name for serialization/deserialization purposes.
*
* @static
* @param {{} | AbstractType} typeOrInstance The type from where the type name should be retrieved.
* @returns {(string | undefined)} The type's full name.
*
* @memberOf Serializable
*/
static getTypeFullName(typeOrInstance) {
if (typeOrInstance instanceof Function) {
return Reflect.getOwnMetadata(Serializable._typeFullNameKey, typeOrInstance);
}
return Reflect.getOwnMetadata(Serializable._typeFullNameKey, typeOrInstance.constructor);
}
/**
* Gets the type namespace for serialization/deserialization purposes.
*
* @static
* @param {AbstractType} typeOrInstance The type from where the type name should be retrieved.
* @returns {(string | undefined)} The type name.
*
* @memberOf Serializable
*/
static getTypeNamespace(typeOrInstance) {
return Reflect.getOwnMetadata(Serializable._typeNamespaceKey, typeOrInstance);
}
/**
* Converts the provided object to a JSON representation.
*
* @static
* @param {object} obj The object to be converted.
* @returns {*} The object containing the JSON representation.
* @memberof Serializable
*/
static getJSON(obj) {
const json = {};
const type = obj.constructor;
let typeName = Serializable.getTypeFullName(type) || Serializable.getTypeFullName(obj);
if (!typeName) {
typeName = type.name;
const namespace = Serializable.getTypeNamespace(type);
if (namespace) {
typeName = `${namespace}.${typeName}`;
}
}
if (typeName) {
json[Serializable._typeFullNameKey] = typeName;
}
Object.keys(obj).forEach(propName => {
if (!propName.startsWith('_') && !propName.startsWith('#')) {
json[propName] = obj[propName];
}
});
return json;
}
/**
* Converts the provided object to a string.
*
* @static
* @param {object} obj The object to be converted.
* @returns {string} The object's string representation.
* @memberof Serializable
*/
static getString(obj) {
return JSON.stringify(Serializable.getJSON(obj));
}
/**
* Converts this object to a JSON representation.
*
* @returns {{}}
*
* @memberOf Serializable
*/
toJSON() {
return Serializable.getJSON(this);
}
/**
* Converts this object to a string.
*
* @returns {string}
*
* @memberOf Serializable
*/
toString() {
return JSON.stringify(this.toJSON());
}
}
Serializable._typeFullNameKey = '$type';
Serializable._typeNamespaceKey = 'kephas:namespace';
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'reflect-metadata';\r\nimport { Requires } from '../diagnostics/contracts/requires';\r\nimport { Expando } from '../expando';\r\nimport { AbstractType } from '../type';\r\n\r\n/**\r\n * Base class for serializable objects.\r\n *\r\n * @export\r\n * @abstract\r\n * @class Serializable\r\n */\r\nexport abstract class Serializable {\r\n    private static _typeFullNameKey: string = '$type';\r\n    private static _typeNamespaceKey: string = 'kephas:namespace';\r\n    /**\r\n     * Gets or sets the name of the key holding the type's full name.\r\n     *\r\n     * @static\r\n     * @type {string}\r\n     * @memberof Serializable\r\n     */\r\n    static get TypeFullNameKey(): string {\r\n        return Serializable._typeFullNameKey;\r\n    }\r\n\r\n    static set TypeFullNameKey(value: string) {\r\n        Requires.HasValue(value, 'value');\r\n        Serializable._typeFullNameKey = value;\r\n    }\r\n\r\n    /**\r\n     * Sets the type name for serialization/deserialization purposes.\r\n     *\r\n     * @static\r\n     * @template T\r\n     * @param {AbstractType} type The type where the full name should be set.\r\n     * @param {string} typeFullName The type's full name.\r\n     *\r\n     * @memberOf Serializable\r\n     */\r\n    static setTypeFullName(type: AbstractType, typeFullName: string): void {\r\n        Requires.HasValue(typeFullName, 'typeFullName');\r\n        Reflect.defineMetadata(Serializable._typeFullNameKey, typeFullName, type);\r\n    }\r\n\r\n    /**\r\n     * Sets the type namespace for serialization/deserialization purposes.\r\n     *\r\n     * @static\r\n     * @template T\r\n     * @param {AbstractType} type The type where the type name should be set.\r\n     * @param {string} namespace The type namespace.\r\n     *\r\n     * @memberOf Serializable\r\n     */\r\n    static setTypeNamespace(type: AbstractType, namespace: string): void {\r\n        Reflect.defineMetadata(Serializable._typeNamespaceKey, namespace, type);\r\n    }\r\n\r\n    /**\r\n     * Gets the type's full name for serialization/deserialization purposes.\r\n     *\r\n     * @static\r\n     * @param {{} | AbstractType} typeOrInstance The type from where the type name should be retrieved.\r\n     * @returns {(string | undefined)} The type's full name.\r\n     *\r\n     * @memberOf Serializable\r\n     */\r\n    static getTypeFullName(typeOrInstance: {} | AbstractType): string | undefined {\r\n        if (typeOrInstance instanceof Function) {\r\n            return Reflect.getOwnMetadata(Serializable._typeFullNameKey, typeOrInstance);\r\n        }\r\n\r\n        return Reflect.getOwnMetadata(Serializable._typeFullNameKey, typeOrInstance.constructor);\r\n    }\r\n\r\n    /**\r\n     * Gets the type namespace for serialization/deserialization purposes.\r\n     *\r\n     * @static\r\n     * @param {AbstractType} typeOrInstance The type from where the type name should be retrieved.\r\n     * @returns {(string | undefined)} The type name.\r\n     *\r\n     * @memberOf Serializable\r\n     */\r\n    static getTypeNamespace(typeOrInstance: AbstractType): string | undefined {\r\n        return Reflect.getOwnMetadata(Serializable._typeNamespaceKey, typeOrInstance);\r\n    }\r\n\r\n    /**\r\n     * Converts the provided object to a JSON representation.\r\n     *\r\n     * @static\r\n     * @param {object} obj The object to be converted.\r\n     * @returns {*} The object containing the JSON representation.\r\n     * @memberof Serializable\r\n     */\r\n    public static getJSON(obj: object): {} {\r\n        const json: Expando = {};\r\n\r\n        const type = obj.constructor;\r\n        let typeName = Serializable.getTypeFullName(type) || Serializable.getTypeFullName(obj);\r\n        if (!typeName) {\r\n            typeName = type.name;\r\n            const namespace = Serializable.getTypeNamespace(type);\r\n            if (namespace) {\r\n                typeName = `${namespace}.${typeName}`;\r\n            }\r\n        }\r\n        if (typeName) {\r\n            json[Serializable._typeFullNameKey] = typeName;\r\n        }\r\n\r\n        Object.keys(obj).forEach(propName => {\r\n            if (!propName.startsWith('_') && !propName.startsWith('#')) {\r\n                json[propName] = (obj as Expando)[propName];\r\n            }\r\n        });\r\n\r\n        return json;\r\n    }\r\n\r\n    /**\r\n     * Converts the provided object to a string.\r\n     *\r\n     * @static\r\n     * @param {object} obj The object to be converted.\r\n     * @returns {string} The object's string representation.\r\n     * @memberof Serializable\r\n     */\r\n    public static getString(obj: object): string {\r\n        return JSON.stringify(Serializable.getJSON(obj));\r\n    }\r\n\r\n    /**\r\n     * Converts this object to a JSON representation.\r\n     *\r\n     * @returns {{}}\r\n     *\r\n     * @memberOf Serializable\r\n     */\r\n    public toJSON(): any {\r\n        return Serializable.getJSON(this);\r\n    }\r\n\r\n    /**\r\n     * Converts this object to a string.\r\n     *\r\n     * @returns {string}\r\n     *\r\n     * @memberOf Serializable\r\n     */\r\n    public toString(): string {\r\n        return JSON.stringify(this.toJSON());\r\n    }\r\n}\r\n"]}