gremlin
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JavaScript Gremlin Language Variant
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<h1 class="page-title">Source: driver/result-set.js</h1>
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<pre class="prettyprint source linenums"><code>/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
/**
* @author Jorge Bay Gondra
*/
'use strict';
const utils = require('../utils');
const emptyMap = Object.freeze(new utils.ImmutableMap());
/**
* Represents the response returned from the execution of a Gremlin traversal or script.
*/
class ResultSet {
/**
* Creates a new instance of {@link ResultSet}.
* @param {Array} items
* @param {Map} [attributes]
*/
constructor(items, attributes) {
if (!Array.isArray(items)) {
throw new TypeError('items must be an Array instance');
}
this._items = items;
/**
* Gets a Map representing the attributes of the response.
* @type {Map}
*/
this.attributes = attributes || emptyMap;
/**
* Gets the amount of items in the result.
* @type {Number}
*/
this.length = items.length;
}
/**
* Gets the iterator associated with this instance.
* @returns {Iterator}
*/
[Symbol.iterator]() {
return this._items[Symbol.iterator]();
}
/**
* Gets an array of result items.
* @returns {Array}
*/
toArray() {
return this._items;
}
/**
* Returns the first item.
* @returns {Object|null}
*/
first() {
const item = this._items[0];
return item !== undefined ? item : null;
}
}
module.exports = ResultSet;
</code></pre>
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