https://github.com/artem-zinnatullin/autojackson

Small example of AutoValue/AutoParcel + Jackson
https://github.com/artem-zinnatullin/autojackson

Last synced: 23 days ago
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Small example of AutoValue/AutoParcel + Jackson

• Host: GitHub
• URL: https://github.com/artem-zinnatullin/autojackson
• Owner: artem-zinnatullin
• License: apache-2.0
• Created: 2015-08-19T17:49:39.000Z (about 9 years ago)
• Default Branch: master
• Last Pushed: 2019-07-19T00:49:13.000Z (over 5 years ago)
• Last Synced: 2023-03-22T16:36:38.251Z (over 1 year ago)
• Language: Java
• Homepage:
• Size: 62.5 KB
• Stars: 72
• Watchers: 2
• Forks: 12
• Open Issues: 4
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# AutoJackson

### Why AutoValue is awesome?

Just read [Google's explanation!](https://github.com/google/auto/tree/master/value)

TLTR: It gives you immutability (thread safety!), `equals()`, `hashCode()` and `toString()` for free!

------

### Okay, I'm in, show me the code!

Simple example of class annotated with [AutoValue](https://github.com/google/auto/tree/master/value) or [AutoParcel](https://github.com/frankiesardo/auto-parcel) + [Jackson](https://github.com/FasterXML/jackson).

It is **serializable** to JSON and **deserializable** from JSON, it's immutable and it has correctly implemented `equals()`, `hashCode()` and `toString()`! Life is better with [AutoValue](https://github.com/google/auto/tree/master/value)!

```java

// Just use @AutoParcel annotations if you need AutoParcel

@AutoValue

@JsonSerizalize(as = Tweet.class)

@JsonDeserialize(builder = Tweet.Builder.class)

public abstract class Tweet {

  @NotNull

  public static Builder builder() {

    return Builder.builder();

  }

  @NotNull

  @JsonProperty("author")

  public abstract String author();

  @NotNull

  @JsonProperty("content")

  public abstract String content();

  @AutoValue.Builder

  public static abstract class Builder {

      

    @JsonCreator

    public static Builder builder() {

        return new AutoValue_Tweet.Builder();

    }

    

    @NotNull

    @JsonProperty("author")

    public abstract Builder author(@NotNull String author);

    @NotNull

    @JsonProperty("content")

    public abstract Builder content(@NotNull String content);

    @NotNull

    public abstract Tweet build();

  }

}

```

**Serialization** and **deserialization**:

```java

@Test

public void shouldSerializeToJson() throws JsonProcessingException {

  ObjectMapper objectMapper = new ObjectMapper();

  Tweet tweet = Tweet.builder()

    .author("@artem_zin")

    .content("Immutability for everybody!")

    .build();

  assertThatJson(objectMapper.writeValueAsString(tweet))

    .isEqualTo("{\"author\":\"@artem_zin\",\"content\":\"Immutability for everybody!\"}");

}

@Test

public void shouldDeserializeFromJson() throws IOException {

  ObjectMapper objectMapper = new ObjectMapper();

  String json = "{\"author\":\"@artem_zin\",\"content\":\"Immutability for everybody!\"}";

  Tweet tweet = objectMapper.readValue(json, Tweet.class);

  assertThat(tweet.author()).isEqualTo("@artem_zin");

  assertThat(tweet.content()).isEqualTo("Immutability for everybody!");

}

```

#### Build the project

Run `sh ci.sh`.

#### Contact me

https://twitter.com/artem_zin