New JsonApiDocument custom class

We need more control over what is provided by the caller

dina-json/src/main/java/ca/gc/aafc/dina/jsonapi/JsonApiDocument.java

@@ -0,0 +1,76 @@
+package ca.gc.aafc.dina.jsonapi;
+
+import java.util.Map;
+import java.util.Set;
+import java.util.UUID;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.extern.jackson.Jacksonized;
+
+@Jacksonized
+@Builder
+@Getter
+public class JsonApiDocument {
+
+  private ResourceObject data;
+
+  public UUID getId() {
+    return data != null ? data.getId() : null;
+  }
+
+  public Map<String, Object> getAttributes() {
+    return data != null ? data.getAttributes() : null;
+  }
+
+  public Map<String, RelationshipObject> getRelationships() {
+    return data != null ? data.getRelationships() : null;
+  }
+
+  /**
+   * Defines a single-resource object as per <a href="https://jsonapi.org/format/#document-resource-objects">...</a>
+   */
+  @Jacksonized
+  @Builder
+  @Getter
+  public static class ResourceObject {
+    private String type;
+    private UUID id;
+
+    private Map<String, Object> attributes;
+
+    private Map<String, RelationshipObject> relationships;
+
+    public Set<String> getAttributesName() {
+      return attributes != null ? attributes.keySet() : Set.of();
+    }
+
+    public Set<String> getRelationshipsName() {
+      return relationships != null ? relationships.keySet() : Set.of();
+    }
+  }
+
+  /**
+   * Defines a relationship object as per <a href="https://jsonapi.org/format/#document-resource-object-relationships">...</a>
+   */
+  @Jacksonized
+  @Builder
+  @Getter
+  public static class RelationshipObject {
+
+    /**
+     * Could be a ResourceIdentifier (to-one) or a List of ResourceIdentifier (to-many)
+     */
+    private Object data;
+  }
+
+  /**
+   * Defines a resource identifier object as per <a href="https://jsonapi.org/format/#document-resource-identifier-objects">...</a>
+   */
+  @Jacksonized
+  @Builder
+  @Getter
+  public static class ResourceIdentifier {
+    private String type;
+    private UUID id;
+  }
+}