@opra/core/service-base.js

Opra schema package

export class ServiceBase {
    get context() {
        this._assertContext();
        return this._context;
    }
    for(context, overwriteProperties, overwriteContext) {
        if (context instanceof ServiceBase)
            context = context.context;
        /** Create new context instance */
        const ctx = {};
        Object.setPrototypeOf(ctx, context);
        if (overwriteContext)
            Object.assign(ctx, overwriteContext);
        /** Create new service instance */
        const instance = { _context: ctx };
        Object.setPrototypeOf(instance, this);
        if (overwriteProperties)
            Object.assign(instance, overwriteProperties);
        if (this[ServiceBase.extendSymbol])
            this[ServiceBase.extendSymbol](instance);
        return instance;
    }
    _assertContext() {
        if (!this._context)
            throw new Error(`No context assigned for ${Object.getPrototypeOf(this).constructor.name}`);
    }
}
(function (ServiceBase) {
    ServiceBase.extendSymbol = Symbol('extend');
})(ServiceBase || (ServiceBase = {}));