private void writeEdges()

in gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/util/star/StarGraphGraphSONSerializerV1.java [121:171]
47 lines of code
21 McCabe index (conditional complexity)

    private void writeEdges(final DirectionalStarGraph directionalStarGraph, final JsonGenerator jsonGenerator,
                            final SerializerProvider serializerProvider,
                            final TypeSerializer typeSerializer,
                            final Direction direction)  throws IOException, JsonProcessingException {
        // only write edges if there are some AND if the user requested them to be serialized AND if they match
        // the direction being serialized by the format
        final StarGraph starGraph = directionalStarGraph.getStarGraphToSerialize();
        final Direction edgeDirectionToSerialize = directionalStarGraph.getDirection();
        final Map<String, List<Edge>> starEdges = direction.equals(Direction.OUT) ? starGraph.starVertex.outEdges : starGraph.starVertex.inEdges;
        final boolean writeEdges = null != starEdges && edgeDirectionToSerialize != null
                && (edgeDirectionToSerialize == direction || edgeDirectionToSerialize == Direction.BOTH);
        if (writeEdges) {
            jsonGenerator.writeObjectFieldStart(direction == Direction.IN ? GraphSONTokens.IN_E : GraphSONTokens.OUT_E);
            if (typeSerializer != null) jsonGenerator.writeStringField(GraphSONTokens.CLASS, HashMap.class.getName());
            final Set<String> keys = normalize ? new TreeSet<>(starEdges.keySet()) : starEdges.keySet();
            for (final String k : keys) {
                final List<Edge> edges = starEdges.get(k);
                jsonGenerator.writeArrayFieldStart(k);
                if (typeSerializer != null) {
                    jsonGenerator.writeString(ArrayList.class.getName());
                    jsonGenerator.writeStartArray();
                }

                final List<Edge> edgesToWrite = normalize ? sort(edges, Comparators.EDGE_COMPARATOR) : edges;
                for (final Edge edge : edgesToWrite) {
                    jsonGenerator.writeStartObject();
                    if (typeSerializer != null) jsonGenerator.writeStringField(GraphSONTokens.CLASS, HashMap.class.getName());
                    GraphSONUtil.writeWithType(GraphSONTokens.ID, edge.id(), jsonGenerator, serializerProvider, typeSerializer);
                    GraphSONUtil.writeWithType(direction.equals(Direction.OUT) ? GraphSONTokens.IN : GraphSONTokens.OUT,
                            direction.equals(Direction.OUT) ? edge.inVertex().id() : edge.outVertex().id(),
                            jsonGenerator, serializerProvider, typeSerializer);

                    final Iterator<Property<Object>> edgeProperties = normalize ?
                            IteratorUtils.list(edge.properties(), Comparators.PROPERTY_COMPARATOR).iterator() : edge.properties();
                    if (edgeProperties.hasNext()) {
                        jsonGenerator.writeObjectFieldStart(GraphSONTokens.PROPERTIES);
                        if (typeSerializer != null) jsonGenerator.writeStringField(GraphSONTokens.CLASS, HashMap.class.getName());
                        while (edgeProperties.hasNext()) {
                            final Property<Object> meta = edgeProperties.next();
                            GraphSONUtil.writeWithType(meta.key(), meta.value(), jsonGenerator, serializerProvider, typeSerializer);
                        }
                        jsonGenerator.writeEndObject();
                    }
                    jsonGenerator.writeEndObject();
                }
                jsonGenerator.writeEndArray();
                if (typeSerializer != null) jsonGenerator.writeEndArray();
            }
            jsonGenerator.writeEndObject();
        }
    }