node-query/lib/Adapter.js

52 lines
1.2 KiB
JavaScript
Executable File

'use strict';
/**
* Class that wraps database connection libraries
*
* @private
* @param {Object} instance - The connection object
*/
class Adapter {
/**
* Invoke an adapter
*
* @constructor
* @param {Object} instance - The connection object
*/
constructor(instance) {
this.instance = instance;
}
/**
* Run the sql query as a prepared statement
*
* @param {String} sql - The sql with placeholders
* @param {Array} params - The values to insert into the query
* @param {Function} [callback] - Callback to run when a response is recieved
* @return {void|Promise} - returns a promise if no callback is passed
*/
execute(/*sql, params, callback*/) {
throw new Error('Correct adapter not defined for query execution');
}
/**
* Transform the adapter's result into a standard format
*
* @param {*} originalResult - the original result object from the driver
* @return {Result} - the new result object
*/
transformResult(originalResult) {
throw new Error('Result transformer method not defined for current adapter');
}
/**
* Close the current database connection
* @return {void}
*/
close() {
this.instance.end();
}
}
module.exports = Adapter;