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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.datastax.driver.dse.IgnoreJDK6Requirement;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
import com.fasterxml.jackson.databind.ser.std.StdSerializer;
import com.google.common.collect.ImmutableMap;
import java.io.IOException;
import java.util.Map;

@IgnoreJDK6Requirement
@SuppressWarnings("Since15")
class GraphSON2JavaTimeModule extends GraphSON2JacksonModule {

  GraphSON2JavaTimeModule() {
    super("graph-graphson2time");

    addSerializer(java.time.Duration.class, new DurationJacksonSerializer());
    addSerializer(java.time.Instant.class, new InstantJacksonSerializer());
    addSerializer(java.time.LocalDate.class, new LocalDateJacksonSerializer());
    addSerializer(java.time.LocalTime.class, new LocalTimeJacksonSerializer());

    addDeserializer(java.time.Duration.class, new DurationJacksonDeserializer());
    addDeserializer(java.time.Instant.class, new InstantJacksonDeserializer());
    addDeserializer(java.time.LocalDate.class, new LocalDateJacksonDeserializer());
    addDeserializer(java.time.LocalTime.class, new LocalTimeJacksonDeserializer());
  }

  @Override
  public Map, String> getTypeDefinitions() {
    final ImmutableMap.Builder, String> builder = ImmutableMap.builder();

    builder.put(java.time.Instant.class, "Instant");
    builder.put(java.time.Duration.class, "Duration");
    builder.put(java.time.LocalDate.class, "LocalDate");
    builder.put(java.time.LocalTime.class, "LocalTime");

    return builder.build();
  }

  @Override
  public String getTypeNamespace() {
    return "gx";
  }

  /** Base class for serializing the {@code java.time.*} from ISO-8061 formats. */
  abstract static class AbstractJavaTimeJacksonDeserializer extends StdDeserializer {
    AbstractJavaTimeJacksonDeserializer(final Class clazz) {
      super(clazz);
    }

    abstract T parse(final String val);

    @Override
    public T deserialize(
        final JsonParser jsonParser, final DeserializationContext deserializationContext)
        throws IOException {
      return parse(jsonParser.getText());
    }
  }

  /** Base class for serializing the {@code java.time.*} to ISO-8061 formats. */
  abstract static class AbstractJavaTimeSerializer extends StdSerializer {

    AbstractJavaTimeSerializer(final Class clazz) {
      super(clazz);
    }

    @Override
    public void serialize(
        final T value, final JsonGenerator gen, final SerializerProvider serializerProvider)
        throws IOException {
      gen.writeString(value.toString());
    }

    @Override
    public void serializeWithType(
        final T value,
        final JsonGenerator gen,
        final SerializerProvider serializers,
        final TypeSerializer typeSer)
        throws IOException {
      typeSer.writeTypePrefixForScalar(value, gen);
      gen.writeString(value.toString());
      typeSer.writeTypeSuffixForScalar(value, gen);
    }
  }

  @IgnoreJDK6Requirement
  static final class DurationJacksonSerializer
      extends AbstractJavaTimeSerializer {

    DurationJacksonSerializer() {
      super(java.time.Duration.class);
    }
  }

  @IgnoreJDK6Requirement
  static final class DurationJacksonDeserializer
      extends AbstractJavaTimeJacksonDeserializer {

    DurationJacksonDeserializer() {
      super(java.time.Duration.class);
    }

    @Override
    public java.time.Duration parse(final String val) {
      return java.time.Duration.parse(val);
    }
  }

  @IgnoreJDK6Requirement
  static final class InstantJacksonSerializer
      extends AbstractJavaTimeSerializer {

    InstantJacksonSerializer() {
      super(java.time.Instant.class);
    }
  }

  @IgnoreJDK6Requirement
  static final class InstantJacksonDeserializer
      extends AbstractJavaTimeJacksonDeserializer {

    InstantJacksonDeserializer() {
      super(java.time.Instant.class);
    }

    @Override
    public java.time.Instant parse(final String val) {
      return java.time.Instant.parse(val);
    }
  }

  @IgnoreJDK6Requirement
  static final class LocalDateJacksonSerializer
      extends AbstractJavaTimeSerializer {

    LocalDateJacksonSerializer() {
      super(java.time.LocalDate.class);
    }
  }

  @IgnoreJDK6Requirement
  static final class LocalDateJacksonDeserializer
      extends AbstractJavaTimeJacksonDeserializer {

    LocalDateJacksonDeserializer() {
      super(java.time.LocalDate.class);
    }

    @Override
    public java.time.LocalDate parse(final String val) {
      return java.time.LocalDate.parse(val);
    }
  }

  @IgnoreJDK6Requirement
  static final class LocalTimeJacksonSerializer
      extends AbstractJavaTimeSerializer {

    LocalTimeJacksonSerializer() {
      super(java.time.LocalTime.class);
    }
  }

  @IgnoreJDK6Requirement
  static final class LocalTimeJacksonDeserializer
      extends AbstractJavaTimeJacksonDeserializer {

    LocalTimeJacksonDeserializer() {
      super(java.time.LocalTime.class);
    }

    @Override
    public java.time.LocalTime parse(final String val) {
      return java.time.LocalTime.parse(val);
    }
  }
}