gwt-jackson

gwt-jackson is a GWT JSON serializer/deserializer mechanism based on Jackson 2.x annotations. Jackson 1.x annotations (org.codehaus.jackson.*) are not supported.

Lots of annotation are already supported, you can find many use cases in the tests.

Check the wiki for more informations.

Quick start

Add <inherits name="com.github.nmorel.gwtjackson.GwtJackson" /> to your module descriptor XML file.

Then just create an interface extending ObjectReader, ObjectWriter or ObjectMapper if you want to read JSON, write an object to JSON or both.

Here's an example :

public class TestEntryPoint implements EntryPoint {

    public static interface PersonMapper extends ObjectMapper<Person> {}

    public static class Person {

        private final String firstName;
        private final String lastName;

        @JsonCreator
        public Person( @JsonProperty( "firstName" ) String firstName,
                       @JsonProperty( "lastName" ) String lastName ) {
            this.firstName = firstName;
            this.lastName = lastName;
        }

        public String getFirstName() {
            return firstName;
        }

        public String getLastName() {
            return lastName;
        }
    }

    @Override
    public void onModuleLoad() {
        PersonMapper mapper = GWT.create( PersonMapper.class );

        String json = mapper.write( new Person( "John", "Doe" ) );
        GWT.log( json ); // > {"firstName":"John","lastName":"Doe"}

        Person person = mapper.read( json );
        GWT.log( person.getFirstName() + " " + person.getLastName() ); // > John Doe
    }
}

Maven

<dependency>
  <groupId>com.github.nmorel.gwtjackson</groupId>
  <artifactId>gwt-jackson</artifactId>
  <version>0.7.0</version>
  <scope>provided</scope>
</dependency>

You can also get maven snapshots using the following repository :

<repository>
  <id>oss-sonatype-snapshots</id>
  <url>https://oss.sonatype.org/content/repositories/snapshots</url>
  <snapshots>
    <enabled>true</enabled>
  </snapshots>
</repository>

Copyright and license

Copyright 2014 Nicolas Morel under the Apache 2.0 license.