gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphson/GraphSONSerializersV2.java [204:549]:
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                throws IOException {
            jsonGenerator.writeStartObject();

            jsonGenerator.writeObjectField(GraphSONTokens.ID, property.id());
            jsonGenerator.writeObjectField(GraphSONTokens.VALUE, property.value());
            if (includeLabel)
                jsonGenerator.writeStringField(GraphSONTokens.LABEL, property.label());
            tryWriteMetaProperties(property, jsonGenerator, normalize);

            jsonGenerator.writeEndObject();
        }

        private static void tryWriteMetaProperties(final VertexProperty property, final JsonGenerator jsonGenerator,
                                                   final boolean normalize) throws IOException {
            // when "detached" you can't check features of the graph it detached from so it has to be
            // treated differently from a regular VertexProperty implementation.
            if (property instanceof DetachedVertexProperty) {
                // only write meta properties key if they exist
                if (property.properties().hasNext()) {
                    writeMetaProperties(property, jsonGenerator, normalize);
                }
            } else {
                // still attached - so we can check the features to see if it's worth even trying to write the
                // meta properties key
                if (property.graph().features().vertex().supportsMetaProperties() && property.properties().hasNext()) {
                    writeMetaProperties(property, jsonGenerator, normalize);
                }
            }
        }

        private static void writeMetaProperties(final VertexProperty property, final JsonGenerator jsonGenerator,
                                                final boolean normalize) throws IOException {
            jsonGenerator.writeFieldName(GraphSONTokens.PROPERTIES);
            jsonGenerator.writeStartObject();

            final Iterator<Property<Object>> metaProperties = normalize ?
                    IteratorUtils.list((Iterator<Property<Object>>) property.properties(), Comparators.PROPERTY_COMPARATOR).iterator() : property.properties();
            while (metaProperties.hasNext()) {
                final Property<Object> metaProperty = metaProperties.next();
                jsonGenerator.writeObjectField(metaProperty.key(), metaProperty.value());
            }

            jsonGenerator.writeEndObject();
        }
    }

    final static class PathJacksonSerializer extends StdScalarSerializer<Path> {

        public PathJacksonSerializer() {
            super(Path.class);
        }

        @Override
        public void serialize(final Path path, final JsonGenerator jsonGenerator, final SerializerProvider serializerProvider)
                throws IOException, JsonGenerationException {
            jsonGenerator.writeStartObject();

            // paths shouldn't serialize with properties if the path contains graph elements
            final Path p = DetachedFactory.detach(path, false);
            jsonGenerator.writeObjectField(GraphSONTokens.LABELS, p.labels());
            jsonGenerator.writeObjectField(GraphSONTokens.OBJECTS, p.objects());

            jsonGenerator.writeEndObject();
        }
    }

    final static class TreeJacksonSerializer extends StdScalarSerializer<Tree> {

        public TreeJacksonSerializer() {
            super(Tree.class);
        }

        @Override
        public void serialize(final Tree tree, final JsonGenerator jsonGenerator, final SerializerProvider serializerProvider) throws IOException, JsonGenerationException {
            jsonGenerator.writeStartArray();
            final Set<Map.Entry<Element, Tree>> set = tree.entrySet();
            for (Map.Entry<Element, Tree> entry : set) {
                jsonGenerator.writeStartObject();
                jsonGenerator.writeObjectField(GraphSONTokens.KEY, entry.getKey());
                jsonGenerator.writeObjectField(GraphSONTokens.VALUE, entry.getValue());
                jsonGenerator.writeEndObject();
            }
            jsonGenerator.writeEndArray();
        }
    }

    final static class TraversalExplanationJacksonSerializer extends StdScalarSerializer<TraversalExplanation> {
        public TraversalExplanationJacksonSerializer() {
            super(TraversalExplanation.class);
        }

        @Override
        public void serialize(final TraversalExplanation traversalExplanation, final JsonGenerator jsonGenerator,
                              final SerializerProvider serializerProvider) throws IOException {
            final Map<String, Object> m = new HashMap<>();
            m.put(GraphSONTokens.ORIGINAL, getStepsAsList(traversalExplanation.getOriginalTraversal()));

            final List<Pair<TraversalStrategy, Traversal.Admin<?, ?>>> strategyTraversals = traversalExplanation.getStrategyTraversals();

            final List<Map<String, Object>> intermediates = new ArrayList<>();
            for (final Pair<TraversalStrategy, Traversal.Admin<?, ?>> pair : strategyTraversals) {
                final Map<String, Object> intermediate = new HashMap<>();
                intermediate.put(GraphSONTokens.STRATEGY, pair.getValue0().toString());
                intermediate.put(GraphSONTokens.CATEGORY, pair.getValue0().getTraversalCategory().getSimpleName());
                intermediate.put(GraphSONTokens.TRAVERSAL, getStepsAsList(pair.getValue1()));
                intermediates.add(intermediate);
            }
            m.put(GraphSONTokens.INTERMEDIATE, intermediates);

            if (strategyTraversals.isEmpty())
                m.put(GraphSONTokens.FINAL, getStepsAsList(traversalExplanation.getOriginalTraversal()));
            else
                m.put(GraphSONTokens.FINAL, getStepsAsList(strategyTraversals.get(strategyTraversals.size() - 1).getValue1()));

            jsonGenerator.writeObject(m);
        }

        private List<String> getStepsAsList(final Traversal.Admin<?, ?> t) {
            final List<String> steps = new ArrayList<>();
            t.getSteps().iterator().forEachRemaining(s -> steps.add(s.toString()));
            return steps;
        }
    }

    final static class IntegerGraphSONSerializer extends StdScalarSerializer<Integer> {
        public IntegerGraphSONSerializer() {
            super(Integer.class);
        }

        @Override
        public void serialize(final Integer integer, final JsonGenerator jsonGenerator,
                              final SerializerProvider serializerProvider) throws IOException {
            jsonGenerator.writeNumber(((Integer) integer).intValue());
        }
    }

    final static class DoubleGraphSONSerializer extends StdScalarSerializer<Double> {
        public DoubleGraphSONSerializer() {
            super(Double.class);
        }

        @Override
        public void serialize(final Double doubleValue, final JsonGenerator jsonGenerator,
                              final SerializerProvider serializerProvider) throws IOException {
            jsonGenerator.writeNumber(doubleValue);
        }
    }

    final static class TraversalMetricsJacksonSerializer extends StdScalarSerializer<TraversalMetrics> {
        public TraversalMetricsJacksonSerializer() {
            super(TraversalMetrics.class);
        }

        @Override
        public void serialize(final TraversalMetrics traversalMetrics, final JsonGenerator jsonGenerator, final SerializerProvider serializerProvider)
                throws IOException {
            // creation of the map enables all the fields to be properly written with their type if required
            final Map<String, Object> m = new HashMap<>();
            m.put(GraphSONTokens.DURATION, traversalMetrics.getDuration(TimeUnit.NANOSECONDS) / 1000000d);
            final List<Metrics> metrics = new ArrayList<>();
            metrics.addAll(traversalMetrics.getMetrics());
            m.put(GraphSONTokens.METRICS, metrics);

            jsonGenerator.writeObject(m);
        }
    }

    final static class MetricsJacksonSerializer extends StdScalarSerializer<Metrics> {
        public MetricsJacksonSerializer() {
            super(Metrics.class);
        }

        @Override
        public void serialize(final Metrics metrics, final JsonGenerator jsonGenerator,
                              final SerializerProvider serializerProvider) throws IOException {
            final Map<String, Object> m = new HashMap<>();
            m.put(GraphSONTokens.ID, metrics.getId());
            m.put(GraphSONTokens.NAME, metrics.getName());
            m.put(GraphSONTokens.COUNTS, metrics.getCounts());
            m.put(GraphSONTokens.DURATION, metrics.getDuration(TimeUnit.NANOSECONDS) / 1000000d);

            if (!metrics.getAnnotations().isEmpty()) {
                m.put(GraphSONTokens.ANNOTATIONS, metrics.getAnnotations());
            }
            if (!metrics.getNested().isEmpty()) {
                final List<Metrics> nested = new ArrayList<>();
                metrics.getNested().forEach(it -> nested.add(it));
                m.put(GraphSONTokens.METRICS, nested);
            }
            jsonGenerator.writeObject(m);
        }
    }


    /**
     * Maps in the JVM can have {@link Object} as a key, but in JSON they must be a {@link String}.
     */
    final static class GraphSONKeySerializer extends StdKeySerializer {

        @Override
        public void serialize(final Object o, final JsonGenerator jsonGenerator, final SerializerProvider serializerProvider) throws IOException {
            ser(o, jsonGenerator, serializerProvider);
        }

        @Override
        public void serializeWithType(final Object o, final JsonGenerator jsonGenerator,
                                      final SerializerProvider serializerProvider, final TypeSerializer typeSerializer) throws IOException {
            ser(o, jsonGenerator, serializerProvider);
        }

        private void ser(final Object o, final JsonGenerator jsonGenerator,
                         final SerializerProvider serializerProvider) throws IOException {
            if (Element.class.isAssignableFrom(o.getClass()))
                jsonGenerator.writeFieldName((((Element) o).id()).toString());
            else
                super.serialize(o, jsonGenerator, serializerProvider);
        }
    }


    //////////////////////////// DESERIALIZERS ///////////////////////////

    static class VertexJacksonDeserializer extends StdDeserializer<Vertex> {

        public VertexJacksonDeserializer() {
            super(Vertex.class);
        }

        public Vertex deserialize(final JsonParser jsonParser, final DeserializationContext deserializationContext) throws IOException, JsonProcessingException {
            final DetachedVertex.Builder v = DetachedVertex.build();
            while (jsonParser.nextToken() != JsonToken.END_OBJECT) {
                if (jsonParser.getCurrentName().equals(GraphSONTokens.ID)) {
                    jsonParser.nextToken();
                    v.setId(deserializationContext.readValue(jsonParser, Object.class));
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.LABEL)) {
                    jsonParser.nextToken();
                    v.setLabel(jsonParser.getText());
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.PROPERTIES)) {
                    jsonParser.nextToken();
                    while (jsonParser.nextToken() != JsonToken.END_OBJECT) {
                        jsonParser.nextToken();
                        while (jsonParser.nextToken() != JsonToken.END_ARRAY) {
                            v.addProperty((DetachedVertexProperty) deserializationContext.readValue(jsonParser, VertexProperty.class));
                        }
                    }
                }
            }

            return v.create();
        }

        @Override
        public boolean isCachable() {
            return true;
        }
    }

    static class EdgeJacksonDeserializer extends StdDeserializer<Edge> {

        public EdgeJacksonDeserializer() {
            super(Edge.class);
        }

        @Override
        public Edge deserialize(final JsonParser jsonParser, final DeserializationContext deserializationContext) throws IOException, JsonProcessingException {
            final DetachedEdge.Builder e = DetachedEdge.build();
            final DetachedVertex.Builder inV = DetachedVertex.build();
            final DetachedVertex.Builder outV = DetachedVertex.build();
            while (jsonParser.nextToken() != JsonToken.END_OBJECT) {
                if (jsonParser.getCurrentName().equals(GraphSONTokens.ID)) {
                    jsonParser.nextToken();
                    e.setId(deserializationContext.readValue(jsonParser, Object.class));
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.LABEL)) {
                    jsonParser.nextToken();
                    e.setLabel(jsonParser.getText());
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.OUT)) {
                    jsonParser.nextToken();
                    outV.setId(deserializationContext.readValue(jsonParser, Object.class));
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.OUT_LABEL)) {
                    jsonParser.nextToken();
                    outV.setLabel(jsonParser.getText());
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.IN)) {
                    jsonParser.nextToken();
                    inV.setId(deserializationContext.readValue(jsonParser, Object.class));
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.IN_LABEL)) {
                    jsonParser.nextToken();
                    inV.setLabel(jsonParser.getText());
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.PROPERTIES)) {
                    jsonParser.nextToken();
                    while (jsonParser.nextToken() != JsonToken.END_OBJECT) {
                        jsonParser.nextToken();
                        e.addProperty(deserializationContext.readValue(jsonParser, Property.class));
                    }
                }
            }

            e.setInV(inV.create());
            e.setOutV(outV.create());

            return e.create();
        }

        @Override
        public boolean isCachable() {
            return true;
        }
    }

    static class PropertyJacksonDeserializer extends StdDeserializer<Property> {

        public PropertyJacksonDeserializer() {
            super(Property.class);
        }

        @Override
        public Property deserialize(final JsonParser jsonParser, final DeserializationContext deserializationContext) throws IOException, JsonProcessingException {
            String key = null;
            Object value = null;
            while (jsonParser.nextToken() != JsonToken.END_OBJECT) {
                if (jsonParser.getCurrentName().equals(GraphSONTokens.KEY)) {
                    jsonParser.nextToken();
                    key = jsonParser.getText();
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.VALUE)) {
                    jsonParser.nextToken();
                    value = deserializationContext.readValue(jsonParser, Object.class);
                }
            }

            return new DetachedProperty<>(key, value);
        }

        @Override
        public boolean isCachable() {
            return true;
        }
    }

    static class PathJacksonDeserializer extends StdDeserializer<Path> {
        private static final JavaType setType = TypeFactory.defaultInstance().constructCollectionType(HashSet.class, String.class);

        public PathJacksonDeserializer() {
            super(Path.class);
        }

        @Override
        public Path deserialize(final JsonParser jsonParser, final DeserializationContext deserializationContext) throws IOException, JsonProcessingException {
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gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/graphson/GraphSONSerializersV3.java [227:572]:
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                throws IOException {
            jsonGenerator.writeStartObject();

            jsonGenerator.writeObjectField(GraphSONTokens.ID, property.id());
            jsonGenerator.writeObjectField(GraphSONTokens.VALUE, property.value());
            if (includeLabel)
                jsonGenerator.writeStringField(GraphSONTokens.LABEL, property.label());
            tryWriteMetaProperties(property, jsonGenerator, normalize);

            jsonGenerator.writeEndObject();
        }

        private static void tryWriteMetaProperties(final VertexProperty property, final JsonGenerator jsonGenerator,
                                                   final boolean normalize) throws IOException {
            // when "detached" you can't check features of the graph it detached from so it has to be
            // treated differently from a regular VertexProperty implementation.
            if (property instanceof DetachedVertexProperty) {
                // only write meta properties key if they exist
                if (property.properties().hasNext()) {
                    writeMetaProperties(property, jsonGenerator, normalize);
                }
            } else {
                // still attached - so we can check the features to see if it's worth even trying to write the
                // meta properties key
                if (property.graph().features().vertex().supportsMetaProperties() && property.properties().hasNext()) {
                    writeMetaProperties(property, jsonGenerator, normalize);
                }
            }
        }

        private static void writeMetaProperties(final VertexProperty property, final JsonGenerator jsonGenerator,
                                                final boolean normalize) throws IOException {
            jsonGenerator.writeFieldName(GraphSONTokens.PROPERTIES);
            jsonGenerator.writeStartObject();

            final Iterator<Property<Object>> metaProperties = normalize ?
                    IteratorUtils.list((Iterator<Property<Object>>) property.properties(), Comparators.PROPERTY_COMPARATOR).iterator() : property.properties();
            while (metaProperties.hasNext()) {
                final Property<Object> metaProperty = metaProperties.next();
                jsonGenerator.writeObjectField(metaProperty.key(), metaProperty.value());
            }

            jsonGenerator.writeEndObject();
        }
    }

    final static class PathJacksonSerializer extends StdScalarSerializer<Path> {

        public PathJacksonSerializer() {
            super(Path.class);
        }

        @Override
        public void serialize(final Path path, final JsonGenerator jsonGenerator, final SerializerProvider serializerProvider)
                throws IOException, JsonGenerationException {
            jsonGenerator.writeStartObject();

            // paths shouldn't serialize with properties if the path contains graph elements
            final Path p = DetachedFactory.detach(path, false);
            jsonGenerator.writeObjectField(GraphSONTokens.LABELS, p.labels());
            jsonGenerator.writeObjectField(GraphSONTokens.OBJECTS, p.objects());

            jsonGenerator.writeEndObject();
        }
    }

    final static class TreeJacksonSerializer extends StdScalarSerializer<Tree> {

        public TreeJacksonSerializer() {
            super(Tree.class);
        }

        @Override
        public void serialize(final Tree tree, final JsonGenerator jsonGenerator, final SerializerProvider serializerProvider) throws IOException, JsonGenerationException {
            jsonGenerator.writeStartArray();
            final Set<Map.Entry<Element, Tree>> set = tree.entrySet();
            for (Map.Entry<Element, Tree> entry : set) {
                jsonGenerator.writeStartObject();
                jsonGenerator.writeObjectField(GraphSONTokens.KEY, entry.getKey());
                jsonGenerator.writeObjectField(GraphSONTokens.VALUE, entry.getValue());
                jsonGenerator.writeEndObject();
            }
            jsonGenerator.writeEndArray();
        }
    }

    final static class TraversalExplanationJacksonSerializer extends StdScalarSerializer<TraversalExplanation> {
        public TraversalExplanationJacksonSerializer() {
            super(TraversalExplanation.class);
        }

        @Override
        public void serialize(final TraversalExplanation traversalExplanation, final JsonGenerator jsonGenerator,
                              final SerializerProvider serializerProvider) throws IOException {
            final Map<String, Object> m = new HashMap<>();
            m.put(GraphSONTokens.ORIGINAL, getStepsAsList(traversalExplanation.getOriginalTraversal()));

            final List<Pair<TraversalStrategy, Traversal.Admin<?, ?>>> strategyTraversals = traversalExplanation.getStrategyTraversals();

            final List<Map<String, Object>> intermediates = new ArrayList<>();
            for (final Pair<TraversalStrategy, Traversal.Admin<?, ?>> pair : strategyTraversals) {
                final Map<String, Object> intermediate = new HashMap<>();
                intermediate.put(GraphSONTokens.STRATEGY, pair.getValue0().toString());
                intermediate.put(GraphSONTokens.CATEGORY, pair.getValue0().getTraversalCategory().getSimpleName());
                intermediate.put(GraphSONTokens.TRAVERSAL, getStepsAsList(pair.getValue1()));
                intermediates.add(intermediate);
            }
            m.put(GraphSONTokens.INTERMEDIATE, intermediates);

            if (strategyTraversals.isEmpty())
                m.put(GraphSONTokens.FINAL, getStepsAsList(traversalExplanation.getOriginalTraversal()));
            else
                m.put(GraphSONTokens.FINAL, getStepsAsList(strategyTraversals.get(strategyTraversals.size() - 1).getValue1()));

            jsonGenerator.writeObject(m);
        }

        private List<String> getStepsAsList(final Traversal.Admin<?, ?> t) {
            final List<String> steps = new ArrayList<>();
            t.getSteps().iterator().forEachRemaining(s -> steps.add(s.toString()));
            return steps;
        }
    }

    final static class IntegerGraphSONSerializer extends StdScalarSerializer<Integer> {
        public IntegerGraphSONSerializer() {
            super(Integer.class);
        }

        @Override
        public void serialize(final Integer integer, final JsonGenerator jsonGenerator,
                              final SerializerProvider serializerProvider) throws IOException {
            jsonGenerator.writeNumber(((Integer) integer).intValue());
        }
    }

    final static class DoubleGraphSONSerializer extends StdScalarSerializer<Double> {
        public DoubleGraphSONSerializer() {
            super(Double.class);
        }

        @Override
        public void serialize(final Double doubleValue, final JsonGenerator jsonGenerator,
                              final SerializerProvider serializerProvider) throws IOException {
            jsonGenerator.writeNumber(doubleValue);
        }
    }

    final static class TraversalMetricsJacksonSerializer extends StdScalarSerializer<TraversalMetrics> {
        public TraversalMetricsJacksonSerializer() {
            super(TraversalMetrics.class);
        }

        @Override
        public void serialize(final TraversalMetrics traversalMetrics, final JsonGenerator jsonGenerator, final SerializerProvider serializerProvider)
                throws IOException {
            // creation of the map enables all the fields to be properly written with their type if required
            final Map<String, Object> m = new HashMap<>();
            m.put(GraphSONTokens.DURATION, traversalMetrics.getDuration(TimeUnit.NANOSECONDS) / 1000000d);
            final List<Metrics> metrics = new ArrayList<>();
            metrics.addAll(traversalMetrics.getMetrics());
            m.put(GraphSONTokens.METRICS, metrics);

            jsonGenerator.writeObject(m);
        }
    }

    final static class MetricsJacksonSerializer extends StdScalarSerializer<Metrics> {
        public MetricsJacksonSerializer() {
            super(Metrics.class);
        }

        @Override
        public void serialize(final Metrics metrics, final JsonGenerator jsonGenerator,
                              final SerializerProvider serializerProvider) throws IOException {
            final Map<String, Object> m = new HashMap<>();
            m.put(GraphSONTokens.ID, metrics.getId());
            m.put(GraphSONTokens.NAME, metrics.getName());
            m.put(GraphSONTokens.COUNTS, metrics.getCounts());
            m.put(GraphSONTokens.DURATION, metrics.getDuration(TimeUnit.NANOSECONDS) / 1000000d);

            if (!metrics.getAnnotations().isEmpty()) {
                m.put(GraphSONTokens.ANNOTATIONS, metrics.getAnnotations());
            }
            if (!metrics.getNested().isEmpty()) {
                final List<Metrics> nested = new ArrayList<>();
                metrics.getNested().forEach(it -> nested.add(it));
                m.put(GraphSONTokens.METRICS, nested);
            }
            jsonGenerator.writeObject(m);
        }
    }


    /**
     * Maps in the JVM can have {@link Object} as a key, but in JSON they must be a {@link String}.
     */
    final static class GraphSONKeySerializer extends StdKeySerializer {

        @Override
        public void serialize(final Object o, final JsonGenerator jsonGenerator, final SerializerProvider serializerProvider) throws IOException {
            ser(o, jsonGenerator, serializerProvider);
        }

        @Override
        public void serializeWithType(final Object o, final JsonGenerator jsonGenerator,
                                      final SerializerProvider serializerProvider, final TypeSerializer typeSerializer) throws IOException {
            ser(o, jsonGenerator, serializerProvider);
        }

        private void ser(final Object o, final JsonGenerator jsonGenerator,
                         final SerializerProvider serializerProvider) throws IOException {
            if (Element.class.isAssignableFrom(o.getClass()))
                jsonGenerator.writeFieldName((((Element) o).id()).toString());
            else
                super.serialize(o, jsonGenerator, serializerProvider);
        }
    }


    //////////////////////////// DESERIALIZERS ///////////////////////////

    static class VertexJacksonDeserializer extends StdDeserializer<Vertex> {

        public VertexJacksonDeserializer() {
            super(Vertex.class);
        }

        public Vertex deserialize(final JsonParser jsonParser, final DeserializationContext deserializationContext) throws IOException, JsonProcessingException {
            final DetachedVertex.Builder v = DetachedVertex.build();
            while (jsonParser.nextToken() != JsonToken.END_OBJECT) {
                if (jsonParser.getCurrentName().equals(GraphSONTokens.ID)) {
                    jsonParser.nextToken();
                    v.setId(deserializationContext.readValue(jsonParser, Object.class));
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.LABEL)) {
                    jsonParser.nextToken();
                    v.setLabel(jsonParser.getText());
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.PROPERTIES)) {
                    jsonParser.nextToken();
                    while (jsonParser.nextToken() != JsonToken.END_OBJECT) {
                        jsonParser.nextToken();
                        while (jsonParser.nextToken() != JsonToken.END_ARRAY) {
                            v.addProperty((DetachedVertexProperty) deserializationContext.readValue(jsonParser, VertexProperty.class));
                        }
                    }
                }
            }

            return v.create();
        }

        @Override
        public boolean isCachable() {
            return true;
        }
    }

    static class EdgeJacksonDeserializer extends StdDeserializer<Edge> {

        public EdgeJacksonDeserializer() {
            super(Edge.class);
        }

        @Override
        public Edge deserialize(final JsonParser jsonParser, final DeserializationContext deserializationContext) throws IOException, JsonProcessingException {
            final DetachedEdge.Builder e = DetachedEdge.build();
            final DetachedVertex.Builder inV = DetachedVertex.build();
            final DetachedVertex.Builder outV = DetachedVertex.build();
            while (jsonParser.nextToken() != JsonToken.END_OBJECT) {
                if (jsonParser.getCurrentName().equals(GraphSONTokens.ID)) {
                    jsonParser.nextToken();
                    e.setId(deserializationContext.readValue(jsonParser, Object.class));
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.LABEL)) {
                    jsonParser.nextToken();
                    e.setLabel(jsonParser.getText());
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.OUT)) {
                    jsonParser.nextToken();
                    outV.setId(deserializationContext.readValue(jsonParser, Object.class));
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.OUT_LABEL)) {
                    jsonParser.nextToken();
                    outV.setLabel(jsonParser.getText());
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.IN)) {
                    jsonParser.nextToken();
                    inV.setId(deserializationContext.readValue(jsonParser, Object.class));
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.IN_LABEL)) {
                    jsonParser.nextToken();
                    inV.setLabel(jsonParser.getText());
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.PROPERTIES)) {
                    jsonParser.nextToken();
                    while (jsonParser.nextToken() != JsonToken.END_OBJECT) {
                        jsonParser.nextToken();
                        e.addProperty(deserializationContext.readValue(jsonParser, Property.class));
                    }
                }
            }

            e.setInV(inV.create());
            e.setOutV(outV.create());

            return e.create();
        }

        @Override
        public boolean isCachable() {
            return true;
        }
    }

    static class PropertyJacksonDeserializer extends StdDeserializer<Property> {

        public PropertyJacksonDeserializer() {
            super(Property.class);
        }

        @Override
        public Property deserialize(final JsonParser jsonParser, final DeserializationContext deserializationContext) throws IOException, JsonProcessingException {
            String key = null;
            Object value = null;
            while (jsonParser.nextToken() != JsonToken.END_OBJECT) {
                if (jsonParser.getCurrentName().equals(GraphSONTokens.KEY)) {
                    jsonParser.nextToken();
                    key = jsonParser.getText();
                } else if (jsonParser.getCurrentName().equals(GraphSONTokens.VALUE)) {
                    jsonParser.nextToken();
                    value = deserializationContext.readValue(jsonParser, Object.class);
                }
            }

            return new DetachedProperty<>(key, value);
        }

        @Override
        public boolean isCachable() {
            return true;
        }
    }

    static class PathJacksonDeserializer extends StdDeserializer<Path> {
        private static final JavaType setType = TypeFactory.defaultInstance().constructCollectionType(HashSet.class, String.class);

        public PathJacksonDeserializer() {
            super(Path.class);
        }

        @Override
        public Path deserialize(final JsonParser jsonParser, final DeserializationContext deserializationContext) throws IOException, JsonProcessingException {
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