| /* |
| * 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. |
| */ |
| package org.apache.tinkerpop.gremlin.structure.io.graphson; |
| |
| import org.apache.tinkerpop.shaded.jackson.annotation.JsonTypeInfo; |
| import org.apache.tinkerpop.shaded.jackson.core.JsonGenerator; |
| import org.apache.tinkerpop.shaded.jackson.core.JsonToken; |
| import org.apache.tinkerpop.shaded.jackson.core.type.WritableTypeId; |
| import org.apache.tinkerpop.shaded.jackson.databind.BeanProperty; |
| import org.apache.tinkerpop.shaded.jackson.databind.jsontype.TypeIdResolver; |
| import org.apache.tinkerpop.shaded.jackson.databind.jsontype.TypeSerializer; |
| |
| import java.io.IOException; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| /** |
| * Extension of the Jackson's default TypeSerializer. An instance of this object will be passed to the serializers |
| * on which they can safely call the utility methods to serialize types and making it compatible with the version |
| * 2.0+ of GraphSON. |
| * |
| * @author Kevin Gallardo (https://kgdo.me) |
| * @author Stephen Mallette (http://stephen.genoprime.com) |
| */ |
| public abstract class AbstractGraphSONTypeSerializer extends TypeSerializer { |
| |
| protected final TypeIdResolver idRes; |
| protected final String propertyName; |
| protected final TypeInfo typeInfo; |
| protected final String valuePropertyName; |
| protected final Map<Class, Class> classMap = new HashMap<>(); |
| |
| AbstractGraphSONTypeSerializer(final TypeIdResolver idRes, final String propertyName, final TypeInfo typeInfo, |
| final String valuePropertyName) { |
| this.idRes = idRes; |
| this.propertyName = propertyName; |
| this.typeInfo = typeInfo; |
| this.valuePropertyName = valuePropertyName; |
| } |
| |
| |
| @Override |
| public TypeSerializer forProperty(final BeanProperty beanProperty) { |
| return this; |
| } |
| |
| @Override |
| public JsonTypeInfo.As getTypeInclusion() { |
| return JsonTypeInfo.As.WRAPPER_OBJECT; |
| } |
| |
| @Override |
| public String getPropertyName() { |
| return propertyName; |
| } |
| |
| @Override |
| public TypeIdResolver getTypeIdResolver() { |
| return idRes; |
| } |
| |
| protected boolean canWriteTypeId() { |
| return typeInfo != null |
| && typeInfo == TypeInfo.PARTIAL_TYPES; |
| } |
| |
| protected void writeTypePrefix(final JsonGenerator jsonGenerator, final String s) throws IOException { |
| jsonGenerator.writeStartObject(); |
| jsonGenerator.writeStringField(propertyName, s); |
| jsonGenerator.writeFieldName(this.valuePropertyName); |
| } |
| |
| protected void writeTypeSuffix(final JsonGenerator jsonGenerator) throws IOException { |
| jsonGenerator.writeEndObject(); |
| } |
| |
| /** |
| * We force only **one** translation of a Java object to a domain specific object. i.e. users register typeIDs |
| * and serializers/deserializers for the predefined types we have in the spec. Graph, Vertex, Edge, |
| * VertexProperty, etc... And **not** their implementations (TinkerGraph, DetachedVertex, TinkerEdge, etc..) |
| */ |
| protected abstract Class getClassFromObject(final Object o); |
| } |