com.datastax.driver.dse.graph.GraphSON2DriverObjectsModule Maven / Gradle / Ivy

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A driver for DataStax Enterprise (DSE) and Apache Cassandra 1.2+ clusters that works exclusively with the Cassandra Query Language version 3 (CQL3) and Cassandra's binary protocol, supporting DSE-specific features such as geospatial types, DSE Graph and DSE authentication.

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/*
 * Copyright DataStax, Inc.
 *
 * This software can be used solely with DataStax Enterprise. Please consult the license at
 * http://www.datastax.com/terms/datastax-dse-driver-license-terms
 */
package com.datastax.driver.dse.graph;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.std.StdSerializer;
import java.io.IOException;

class GraphSON2DriverObjectsModule extends SimpleModule {

  GraphSON2DriverObjectsModule() {
    super("graph-graphson2driverobjects");
    addSerializer(Element.class, new ElementGraphSON2Serializer());
    addSerializer(ObjectGraphNode.class, new ObjectGraphNodeGraphSON2Serializer());
  }

  static final class ElementGraphSON2Serializer extends StdSerializer {

    ElementGraphSON2Serializer() {
      super(Element.class);
    }

    @Override
    public void serialize(
        Element element, JsonGenerator jsonGenerator, SerializerProvider serializerProvider)
        throws IOException {
      jsonGenerator.writeObject((ObjectGraphNode) element.getId());
    }

    @Override
    public void serializeWithType(
        Element element,
        JsonGenerator jsonGenerator,
        SerializerProvider serializerProvider,
        TypeSerializer typeSerializer)
        throws IOException {
      serialize(element, jsonGenerator, serializerProvider);
    }
  }

  static final class ObjectGraphNodeGraphSON2Serializer extends StdSerializer {

    ObjectGraphNodeGraphSON2Serializer() {
      super(ObjectGraphNode.class);
    }

    @Override
    public void serialize(
        ObjectGraphNode objectGraphNode,
        JsonGenerator jsonGenerator,
        SerializerProvider serializerProvider)
        throws IOException {
      jsonGenerator.writeObject(objectGraphNode.as(Object.class));
    }

    @Override
    public void serializeWithType(
        ObjectGraphNode objectGraphNode,
        JsonGenerator jsonGenerator,
        SerializerProvider serializerProvider,
        TypeSerializer typeSerializer)
        throws IOException {
      serialize(objectGraphNode, jsonGenerator, serializerProvider);
    }
  }
}