### Programmatically Creating a JSON-stat Dataset in Java

Source: https://github.com/statisticsnorway/json-stat.java/blob/develop/README.md

This Java example illustrates how to construct a `Dataset` object using the `Dataset.Builder` pattern. It demonstrates adding multiple dimensions with various roles (TIME, METRIC) and indexed labels, providing a structured way to define a JSON-stat dataset programmatically.

```Java
class Example {
    static {
        Dataset.Builder builder = Dataset.create().withLabel("My dataset");

        builder.withDimension(
            Dimension.create("year")
                .withRole(Dimension.Roles.TIME)
                .withIndexedLabels(ImmutableMap.of("2003", "2003", "2004", "2004", "2005", "2005")
            )
        );

        builder.withDimension(
            Dimension.create("month").withRole(Dimension.Roles.TIME)
                .withIndexedLabels(ImmutableMap.of("may", "may", "june", "june", "july", "july")
            )
        );

        builder.withDimension(
            Dimension.create("week").withTimeRole()
                .withIndexedLabels(ImmutableMap.of("30", "30", "31", "31", "32", "32")
            )
        );

        builder.withDimension(
            Dimension.create("population").withMetricRole()
                     .withIndexedLabels(ImmutableMap.of(
                                "A", "active population",
                                "E", "employment",
                                "U", "unemployment",
                                "I", "inactive population",
                                "T", "population 15 years old and over"))
        );

        builder.withDimension(
            Dimension.create("amount").withMetricRole()
                .withIndexedLabels(ImmutableMap.of("millions", "millions"))
        );

        builder.withDimension(
            Dimension.create("percent").withMetricRole()
                .withIndexedLabels(ImmutableMap.of("%", "percent"))
        );

        Dataset dataset = builder.withMapper(
                dimensions -> newArrayList(
                        dimensions.hashCode(),
                        dimensions.hashCode())
        );
    }
}
```

--------------------------------

### Adding JSON-stat Java Dependency to Maven Project

Source: https://github.com/statisticsnorway/json-stat.java/blob/develop/README.md

This XML snippet demonstrates how to add the `json-stat-java` library as a dependency to a Maven project's `pom.xml` file. This allows the project to access and use the JSON-stat functionalities provided by the library.

```XML
<dependency>
            <groupId>no.ssb.jsonstat</groupId>
            <artifactId>json-stat-java</artifactId>
            <version>0.2.5</version>
</dependency>
```

--------------------------------

### Registering JsonStatModule with Jackson ObjectMapper in Java

Source: https://github.com/statisticsnorway/json-stat.java/blob/develop/README.md

This Java code shows how to initialize a Jackson `ObjectMapper` and register the `JsonStatModule` along with `JavaTimeModule`. Registering these modules is crucial for `ObjectMapper` to correctly serialize and deserialize JSON-stat objects and Java 8 Date and Time API types.

```Java
class Example {
    static {
        mapper = new ObjectMapper();
        mapper.registerModule(new JsonStatModule());
        mapper.registerModule(new JavaTimeModule());
    }
}
```

--------------------------------

### Deserializing JSON-stat Dataset with Jackson ObjectMapper in Java

Source: https://github.com/statisticsnorway/json-stat.java/blob/develop/README.md

This Java code snippet demonstrates how to deserialize a JSON-stat dataset string into a `Dataset.Builder` or `Dataset` object using a configured Jackson `ObjectMapper`. It highlights the necessity of registering `GuavaModule`, `Jdk8Module`, `JavaTimeModule`, and `JsonStatModule` for proper deserialization of complex types.

```Java
class Example {
    static {
        mapper = new ObjectMapper();
        
        mapper.registerModule(new GuavaModule());
        mapper.registerModule(new Jdk8Module());
        mapper.registerModule(new JavaTimeModule());
        
        mapper.registerModule(new JsonStatModule());

        Dataset.Builder builder = mapper.readValue("{ ... }", Dataset.Builder.class);
        // Or
        Dataset dataset = mapper.readValue("{ ... }", Dataset.class);
    }
}
```

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