| /* |
| * 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 Igor Ostapenko |
| */ |
| 'use strict'; |
| |
| module.exports = class AnySerializer { |
| constructor(ioc) { |
| this.ioc = ioc; |
| |
| // specifically ordered, the first canBeUsedFor=true wins |
| this.serializers = [ |
| ioc.unspecifiedNullSerializer, |
| |
| ioc.numberSerializationStrategy, |
| |
| ioc.booleanSerializer, |
| ioc.dateSerializer, |
| ioc.bytecodeSerializer, |
| ioc.pSerializer, |
| ioc.traverserSerializer, |
| ioc.enumSerializer, |
| ioc.listSerializer, |
| ioc.uuidSerializer, |
| ioc.edgeSerializer, |
| ioc.pathSerializer, |
| ioc.propertySerializer, |
| ioc.vertexSerializer, |
| ioc.vertexPropertySerializer, |
| ioc.stringSerializer, |
| ioc.textPSerializer, |
| ioc.traversalStrategySerializer, |
| |
| ioc.byteBufferSerializer, // Buffer instance |
| ioc.lambdaSerializer, // any function |
| ioc.mapSerializer, // Map or any Object |
| ]; |
| } |
| |
| getSerializerCanBeUsedFor(item) { |
| for (let i = 0; i < this.serializers.length; i++) { |
| if (this.serializers[i].canBeUsedFor(item)) { |
| return this.serializers[i]; |
| } |
| } |
| |
| throw new Error( |
| `No serializer found to support item where typeof(item)='${typeof item}' and String(item)='${String(item)}'.`, |
| ); |
| } |
| |
| serialize(item, fullyQualifiedFormat = true) { |
| return this.getSerializerCanBeUsedFor(item).serialize(item, fullyQualifiedFormat); |
| } |
| |
| deserialize(buffer) { |
| // obviously, fullyQualifiedFormat always is true |
| try { |
| if (buffer === undefined || buffer === null || !(buffer instanceof Buffer)) { |
| throw new Error('buffer is missing'); |
| } |
| if (buffer.length < 1) { |
| throw new Error('buffer is empty'); |
| } |
| |
| const type_code = buffer.readUInt8(); |
| const serializer = this.ioc.serializers[type_code]; |
| if (!serializer) { |
| throw new Error('unknown {type_code}'); |
| } |
| |
| return serializer.deserialize(buffer); |
| } catch (err) { |
| throw this.ioc.utils.des_error({ serializer: this, args: arguments, err }); |
| } |
| } |
| }; |