| /* |
| * 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.core.JsonGenerator; |
| import org.apache.tinkerpop.shaded.jackson.core.JsonParser; |
| import org.apache.tinkerpop.shaded.jackson.core.JsonProcessingException; |
| import org.apache.tinkerpop.shaded.jackson.core.JsonToken; |
| import org.apache.tinkerpop.shaded.jackson.databind.DeserializationContext; |
| import org.apache.tinkerpop.shaded.jackson.databind.SerializerProvider; |
| import org.apache.tinkerpop.shaded.jackson.databind.deser.std.StdDeserializer; |
| import org.apache.tinkerpop.shaded.jackson.databind.jsontype.TypeSerializer; |
| import org.apache.tinkerpop.shaded.jackson.databind.ser.std.StdSerializer; |
| |
| import java.io.IOException; |
| import java.util.HashMap; |
| import java.util.LinkedHashMap; |
| import java.util.LinkedHashSet; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| /** |
| * GraphSON serializers for classes in {@code java.util.*} for the version 3.0 of GraphSON. |
| */ |
| final class JavaUtilSerializersV3d0 { |
| |
| private JavaUtilSerializersV3d0() {} |
| |
| ////////////////////////////// SERIALIZERS ///////////////////////////////// |
| |
| final static class MapJacksonSerializer extends StdSerializer<Map> { |
| public MapJacksonSerializer() { |
| super(Map.class); |
| } |
| |
| @Override |
| public void serialize(final Map map, final JsonGenerator jsonGenerator, final SerializerProvider serializerProvider) |
| throws IOException { |
| for(Map.Entry entry : (Set<Map.Entry>) map.entrySet()) { |
| jsonGenerator.writeObject(entry.getKey()); |
| jsonGenerator.writeObject(entry.getValue()); |
| } |
| } |
| |
| @Override |
| public void serializeWithType(final Map map, final JsonGenerator jsonGenerator, |
| final SerializerProvider serializerProvider, final TypeSerializer typeSerializer) throws IOException { |
| typeSerializer.writeTypePrefixForObject(map, jsonGenerator); |
| serialize(map, jsonGenerator, serializerProvider); |
| typeSerializer.writeTypeSuffixForObject(map, jsonGenerator); |
| } |
| } |
| |
| /** |
| * Coerces {@code Map.Entry} to a {@code Map} with a single entry in it. |
| */ |
| final static class MapEntryJacksonSerializer extends StdSerializer<Map.Entry> { |
| |
| public MapEntryJacksonSerializer() { |
| super(Map.Entry.class); |
| } |
| |
| @Override |
| public void serialize(final Map.Entry entry, final JsonGenerator jsonGenerator, final SerializerProvider serializerProvider) |
| throws IOException { |
| final Map<Object,Object> m = new HashMap<>(); |
| if (entry != null) m.put(entry.getKey(), entry.getValue()); |
| jsonGenerator.writeObject(m); |
| } |
| |
| @Override |
| public void serializeWithType(final Map.Entry entry, final JsonGenerator jsonGenerator, |
| final SerializerProvider serializerProvider, final TypeSerializer typeSerializer) throws IOException { |
| serialize(entry, jsonGenerator, serializerProvider); |
| } |
| } |
| |
| final static class SetJacksonSerializer extends StdSerializer<Set> { |
| public SetJacksonSerializer() { |
| super(Set.class); |
| } |
| |
| @Override |
| public void serialize(final Set set, final JsonGenerator jsonGenerator, final SerializerProvider serializerProvider) |
| throws IOException { |
| for(Object o : set) { |
| jsonGenerator.writeObject(o); |
| } |
| } |
| |
| @Override |
| public void serializeWithType(final Set set, final JsonGenerator jsonGenerator, |
| final SerializerProvider serializerProvider, final TypeSerializer typeSerializer) throws IOException { |
| typeSerializer.writeTypePrefixForArray(set, jsonGenerator); |
| serialize(set, jsonGenerator, serializerProvider); |
| typeSerializer.writeTypeSuffixForArray(set, jsonGenerator); |
| } |
| } |
| |
| final static class ListJacksonSerializer extends StdSerializer<List> { |
| public ListJacksonSerializer() { |
| super(List.class); |
| } |
| |
| @Override |
| public void serialize(final List list, final JsonGenerator jsonGenerator, final SerializerProvider serializerProvider) |
| throws IOException { |
| for(Object o : list) { |
| jsonGenerator.writeObject(o); |
| } |
| } |
| |
| @Override |
| public void serializeWithType(final List list, final JsonGenerator jsonGenerator, |
| final SerializerProvider serializerProvider, final TypeSerializer typeSerializer) throws IOException { |
| typeSerializer.writeTypePrefixForArray(list, jsonGenerator); |
| serialize(list, jsonGenerator, serializerProvider); |
| typeSerializer.writeTypeSuffixForArray(list, jsonGenerator); |
| } |
| } |
| |
| ////////////////////////////// DESERIALIZERS ///////////////////////////////// |
| |
| |
| static class MapJacksonDeserializer extends StdDeserializer<Map> { |
| |
| protected MapJacksonDeserializer() { |
| super(Map.class); |
| } |
| |
| @Override |
| public Map deserialize(final JsonParser jsonParser, final DeserializationContext deserializationContext) throws IOException, JsonProcessingException { |
| final Map<Object,Object> m = new LinkedHashMap<>(); |
| |
| while (jsonParser.nextToken() != JsonToken.END_ARRAY) { |
| final Object key = deserializationContext.readValue(jsonParser, Object.class); |
| jsonParser.nextToken(); |
| final Object val = deserializationContext.readValue(jsonParser, Object.class); |
| m.put(key, val); |
| } |
| |
| return m; |
| } |
| } |
| |
| static class SetJacksonDeserializer extends StdDeserializer<Set> { |
| |
| protected SetJacksonDeserializer() { |
| super(Set.class); |
| } |
| |
| @Override |
| public Set deserialize(final JsonParser jsonParser, final DeserializationContext deserializationContext) throws IOException, JsonProcessingException { |
| final Set<Object> s = new LinkedHashSet<>(); |
| |
| while (jsonParser.nextToken() != JsonToken.END_ARRAY) { |
| s.add(deserializationContext.readValue(jsonParser, Object.class)); |
| } |
| |
| return s; |
| } |
| } |
| |
| static class ListJacksonDeserializer extends StdDeserializer<List> { |
| |
| protected ListJacksonDeserializer() { |
| super(List.class); |
| } |
| |
| @Override |
| public List deserialize(final JsonParser jsonParser, final DeserializationContext deserializationContext) throws IOException, JsonProcessingException { |
| final List<Object> s = new LinkedList<>(); |
| |
| while (jsonParser.nextToken() != JsonToken.END_ARRAY) { |
| s.add(deserializationContext.readValue(jsonParser, Object.class)); |
| } |
| |
| return s; |
| } |
| } |
| } |