fix: apply polymorphic to Dataset for serde

DEPENDENCIES

@@ -1,4 +1,4 @@
 maven/mavencentral/com.apicatalog/carbon-did/0.3.0, Apache-2.0, approved, clearlydefined
 maven/mavencentral/com.apicatalog/copper-multibase/0.5.0, Apache-2.0, approved, #14501
 maven/mavencentral/com.apicatalog/copper-multicodec/0.1.1, Apache-2.0, approved, #14500
 maven/mavencentral/com.apicatalog/iron-ed25519-cryptosuite-2020/0.14.0, Apache-2.0, approved, #14503
@@ -82,7 +82,7 @@
 maven/mavencentral/com.nimbusds/nimbus-jose-jwt/9.28, Apache-2.0, approved, clearlydefined
 maven/mavencentral/com.nimbusds/nimbus-jose-jwt/9.40, Apache-2.0, approved, #15156
 maven/mavencentral/com.puppycrawl.tools/checkstyle/10.17.0, LGPL-2.1-or-later AND (Apache-2.0 AND LGPL-2.1-or-later) AND Apache-2.0, approved, #15077
-maven/mavencentral/com.samskivert/jmustache/1.15, BSD-2-Clause, approved, clearlydefined
+maven/mavencentral/com.samskivert/jmustache/1.15, BSD-2-Clause AND BSD-3-Clause, approved, clearlydefined
 maven/mavencentral/com.squareup.okhttp3/okhttp-dnsoverhttps/4.12.0, Apache-2.0, approved, #11159
 maven/mavencentral/com.squareup.okhttp3/okhttp/4.12.0, Apache-2.0, approved, #15227
 maven/mavencentral/com.squareup.okhttp3/okhttp/4.9.3, Apache-2.0 AND MPL-2.0, approved, #3225
@@ -225,7 +225,7 @@
 maven/mavencentral/org.apache.maven.doxia/doxia-sink-api/1.12.0, Apache-2.0, approved, clearlydefined
 maven/mavencentral/org.apache.velocity.tools/velocity-tools-generic/3.1, Apache-2.0, approved, #9331
 maven/mavencentral/org.apache.velocity/velocity-engine-core/2.3, Apache-2.0, approved, #2478
-maven/mavencentral/org.apache.velocity/velocity-engine-scripting/2.3, Apache-2.0, approved, clearlydefined
+maven/mavencentral/org.apache.velocity/velocity-engine-scripting/2.3, Apache-2.0, restricted, clearlydefined
 maven/mavencentral/org.apache.xbean/xbean-reflect/3.7, Apache-2.0, approved, clearlydefined
 maven/mavencentral/org.apiguardian/apiguardian-api/1.1.2, Apache-2.0, approved, clearlydefined
 maven/mavencentral/org.assertj/assertj-core/3.26.0, Apache-2.0, approved, #14886

spi/control-plane/catalog-spi/src/main/java/org/eclipse/edc/connector/controlplane/catalog/spi/Catalog.java

@@ -15,6 +15,7 @@
 
 package org.eclipse.edc.connector.controlplane.catalog.spi;
 
+import com.fasterxml.jackson.annotation.JsonTypeName;
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonPOJOBuilder;
 
@@ -25,6 +26,7 @@
  * Entity representing a Catalog
  */
 @JsonDeserialize(builder = Catalog.Builder.class)
+@JsonTypeName("dataspaceconnector:catalog")
 public class Catalog extends Dataset {
     protected final List<Dataset> datasets = new ArrayList<>();
     protected List<DataService> dataServices = new ArrayList<>();

spi/control-plane/catalog-spi/src/main/java/org/eclipse/edc/connector/controlplane/catalog/spi/Dataset.java

@@ -16,9 +16,11 @@
 
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.annotation.JsonTypeName;
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonPOJOBuilder;
 import org.eclipse.edc.policy.model.Policy;
+import org.eclipse.edc.spi.types.domain.Polymorphic;
 
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -33,7 +35,8 @@
  * different policies and may be available via different distributions.
  */
 @JsonDeserialize(builder = Dataset.Builder.class)
-public class Dataset {
+@JsonTypeName("dataspaceconnector:dataset")
+public class Dataset implements Polymorphic {
 
     /**
      * Policies under which this Dataset is available.

spi/control-plane/catalog-spi/src/test/java/org/eclipse/edc/connector/controlplane/catalog/spi/CatalogSerializationTest.java

@@ -17,6 +17,7 @@
 import org.eclipse.edc.json.JacksonTypeManager;
 import org.eclipse.edc.policy.model.Policy;
 import org.eclipse.edc.spi.types.TypeManager;
+import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
 import java.util.List;
@@ -28,14 +29,21 @@ class CatalogSerializationTest {
 
     private final TypeManager typeManager = new JacksonTypeManager();
 
+    @BeforeEach
+    void beforeAll() {
+        typeManager.registerTypes(Catalog.class, Dataset.class);
+    }
+
     @Test
     void verifySerialization() {
         var catalog = createCatalog();
 
         var json = typeManager.writeValueAsString(catalog);
 
         var deserialized = typeManager.readValue(json, Catalog.class);
-        assertThat(deserialized).usingRecursiveComparison().isEqualTo(catalog);
+        assertThat(catalog).usingRecursiveComparison().isEqualTo(deserialized);
+
+        assertThat(catalog.getDatasets().get(1)).isInstanceOf(Catalog.class);
     }
 
 
@@ -51,10 +59,13 @@ private Catalog createCatalog() {
                 .distributions(List.of(distribution))
                 .build();
 
+
+        var nestedCatalog = Catalog.Builder.newInstance().id("nestedId").participantId("participantId").build();
+
         return Catalog.Builder.newInstance()
                 .id("id")
                 .dataServices(List.of(dataService))
-                .datasets(List.of(dataset))
+                .datasets(List.of(dataset, nestedCatalog))
                 .property("prop", "propValue")
                 .build();
     }