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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 (C) 2012-2017 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.core.Version;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.std.StdSerializer;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;

import java.io.IOException;
import java.util.List;
import java.util.Map;

/**
 * Serializers and deserializers for JSR 310 {@code java.time.*}.
 */
@IgnoreJDK6Requirement
@SuppressWarnings("Since15")
class GraphSON1JavaTimeModule extends SimpleModule {

    GraphSON1JavaTimeModule(String name, Version version) {
        super(name, version, createDeserializers(), createSerializers());
    }

    private static Map, JsonDeserializer> createDeserializers() {

        return ImmutableMap., JsonDeserializer>builder()
                .put(java.time.Duration.class, new DurationJacksonDeserializer())
                .put(java.time.Instant.class, new InstantJacksonDeserializer())
                .put(java.time.LocalDate.class, new LocalDateJacksonDeserializer())
                .put(java.time.LocalTime.class, new LocalTimeJacksonDeserializer())
                .build();
    }

    private static List> createSerializers() {
        return ImmutableList.>builder()
                .add(new DurationJacksonSerializer())
                .add(new InstantJacksonSerializer())
                .add(new LocalDateJacksonSerializer())
                .add(new LocalTimeJacksonSerializer())
                .build();
    }

    /**
     * Base class for serializing the {@code java.time.*} types to ISO-8061 formats.
     */
    @IgnoreJDK6Requirement
    static abstract 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());
        }

    }

    /**
     * Base class for deserializing the {@code java.time.*} types from ISO-8061 formats.
     */
    @IgnoreJDK6Requirement
    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());
        }
    }

    @IgnoreJDK6Requirement
    final static class DurationJacksonSerializer extends AbstractJavaTimeSerializer {

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

    @IgnoreJDK6Requirement
    final static 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
    final static class InstantJacksonSerializer extends AbstractJavaTimeSerializer {

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

    @IgnoreJDK6Requirement
    final static 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
    final static class LocalDateJacksonSerializer extends AbstractJavaTimeSerializer {

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

    @IgnoreJDK6Requirement
    final static 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
    final static class LocalTimeJacksonSerializer extends AbstractJavaTimeSerializer {

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

    @IgnoreJDK6Requirement
    final static 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);
        }
    }
}