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84 lines
2.7 KiB
JavaScript
84 lines
2.7 KiB
JavaScript
/*
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* Copyright DataStax, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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const types = require('../../types');
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const { dataTypes } = types;
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/**
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* Internal representation of a value with additional type information.
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* @internal
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* @ignore
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*/
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class GraphTypeWrapper {
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constructor(value, typeInfo) {
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this.value = value;
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this.typeInfo = typeof typeInfo === 'number' ? { code: typeInfo } : typeInfo;
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}
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}
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/**
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* Internal representation of user-defined type with the metadata.
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* @internal
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* @ignore
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*/
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class UdtGraphWrapper {
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constructor(value, udtInfo) {
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this.value = value;
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if (!udtInfo || !udtInfo.name || !udtInfo.keyspace || !udtInfo.fields) {
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throw new TypeError(`udtInfo must be an object with name, keyspace and field properties defined`);
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}
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this.udtInfo = udtInfo;
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}
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}
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/**
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* Wraps a number or null value to hint the client driver that the data type of the value is an int
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* @memberOf module:datastax/graph
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*/
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function asInt(value) { return new GraphTypeWrapper(value, dataTypes.int); }
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/**
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* Wraps a number or null value to hint the client driver that the data type of the value is a double
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* @memberOf module:datastax/graph
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*/
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function asDouble(value) { return new GraphTypeWrapper(value, dataTypes.double); }
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/**
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* Wraps a number or null value to hint the client driver that the data type of the value is a double
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* @memberOf module:datastax/graph
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*/
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function asFloat(value) { return new GraphTypeWrapper(value, dataTypes.float); }
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/**
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* Wraps a Date or null value to hint the client driver that the data type of the value is a timestamp
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* @memberOf module:datastax/graph
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*/
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function asTimestamp(value) { return new GraphTypeWrapper(value, dataTypes.timestamp); }
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/**
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* Wraps an Object or null value to hint the client driver that the data type of the value is a user-defined type.
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* @memberOf module:datastax/graph
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* @param {object} value The object representing the UDT.
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* @param {{name: string, keyspace: string, fields: Array}} udtInfo The UDT metadata as defined by the driver.
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*/
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function asUdt(value, udtInfo) { return new UdtGraphWrapper(value, udtInfo); }
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module.exports = { asInt, asDouble, asFloat, asTimestamp, asUdt, UdtGraphWrapper, GraphTypeWrapper }; |