/* * 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; } } }