Remove the concept of a TransferData abstract class

The only type of thing that can be transferred now is a domain, so
there's no point in having this abstract class / redirection.

This does not include deletion of the contact-response-related XML
classes; that can come next.

Author: gbrodman

core/src/main/java/google/registry/flows/domain/DomainTransferRequestFlow.java

@@ -76,7 +76,7 @@
 import google.registry.model.reporting.IcannReportingTypes.ActivityReportField;
 import google.registry.model.tld.Tld;
 import google.registry.model.transfer.DomainTransferData;
-import google.registry.model.transfer.TransferData.TransferServerApproveEntity;
+import google.registry.model.transfer.DomainTransferData.TransferServerApproveEntity;
 import google.registry.model.transfer.TransferResponse.DomainTransferResponse;
 import google.registry.model.transfer.TransferStatus;
 import jakarta.inject.Inject;

core/src/main/java/google/registry/flows/domain/DomainTransferUtils.java

@@ -36,8 +36,7 @@
 import google.registry.model.reporting.HistoryEntry.HistoryEntryId;
 import google.registry.model.tld.Tld;
 import google.registry.model.transfer.DomainTransferData;
-import google.registry.model.transfer.TransferData;
-import google.registry.model.transfer.TransferData.TransferServerApproveEntity;
+import google.registry.model.transfer.DomainTransferData.TransferServerApproveEntity;
 import google.registry.model.transfer.TransferResponse.DomainTransferResponse;
 import google.registry.model.transfer.TransferStatus;
 import google.registry.persistence.VKey;
@@ -51,7 +50,7 @@
  */
 public final class DomainTransferUtils {
 
-  /** Sets up {@link TransferData} for a domain with links to entities for server approval. */
+  /** Sets up {@link DomainTransferData} for a domain with links to entities for server approval. */
   public static DomainTransferData createPendingTransferData(
       String domainRepoId,
       Long historyId,
@@ -179,7 +178,7 @@ public static ImmutableSet<TransferServerApproveEntity> createTransferServerAppr
   /** Create a poll message for the gaining client in a transfer. */
   public static PollMessage createGainingTransferPollMessage(
       String targetId,
-      TransferData transferData,
+      DomainTransferData transferData,
       @Nullable DateTime extendedRegistrationExpirationTime,
       DateTime now,
       HistoryEntryId domainHistoryId) {
@@ -202,7 +201,7 @@ public static PollMessage createGainingTransferPollMessage(
   /** Create a poll message for the losing client in a transfer. */
   public static PollMessage createLosingTransferPollMessage(
       String targetId,
-      TransferData transferData,
+      DomainTransferData transferData,
       @Nullable DateTime extendedRegistrationExpirationTime,
       HistoryEntryId domainHistoryId) {
     return new PollMessage.OneTime.Builder()
@@ -216,10 +215,10 @@ public static PollMessage createLosingTransferPollMessage(
         .build();
   }
 
-  /** Create a {@link DomainTransferResponse} off of the info in a {@link TransferData}. */
+  /** Create a {@link DomainTransferResponse} off of the info in a {@link DomainTransferData}. */
   static DomainTransferResponse createTransferResponse(
       String targetId,
-      TransferData transferData,
+      DomainTransferData transferData,
       @Nullable DateTime extendedRegistrationExpirationTime) {
     return new DomainTransferResponse.Builder()
         .setDomainName(targetId)

core/src/main/java/google/registry/model/EppResource.java

@@ -34,7 +34,6 @@
 import com.google.gson.annotations.Expose;
 import google.registry.config.RegistryConfig;
 import google.registry.model.eppcommon.StatusValue;
-import google.registry.model.transfer.TransferData;
 import google.registry.persistence.VKey;
 import google.registry.util.NonFinalForTesting;
 import jakarta.persistence.Access;
@@ -207,27 +206,6 @@ public DateTime getDeletionTime() {
   /** EppResources that are loaded via foreign keys should implement this marker interface. */
   public interface ForeignKeyedEppResource {}
 
-  /** An interface for resources that have transfer data. */
-  public interface ResourceWithTransferData<T extends TransferData> {
-    T getTransferData();
-
-    /**
-     * The time that this resource was last transferred.
-     *
-     * <p>Can be null if the resource has never been transferred.
-     */
-    DateTime getLastTransferTime();
-  }
-
-  /** An interface for builders of resources that have transfer data. */
-  public interface BuilderWithTransferData<
-      T extends TransferData, B extends BuilderWithTransferData<T, B>> {
-    B setTransferData(T transferData);
-
-    /** Set the time when this resource was transferred. */
-    B setLastTransferTime(DateTime lastTransferTime);
-  }
-
   /** Abstract builder for {@link EppResource} types. */
   public abstract static class Builder<T extends EppResource, B extends Builder<T, B>>
       extends GenericBuilder<T, B> {

core/src/main/java/google/registry/model/ResourceTransferUtils.java

@@ -29,7 +29,6 @@
 import google.registry.model.poll.PollMessage;
 import google.registry.model.reporting.HistoryEntry;
 import google.registry.model.transfer.DomainTransferData;
-import google.registry.model.transfer.TransferData;
 import google.registry.model.transfer.TransferResponse;
 import google.registry.model.transfer.TransferResponse.DomainTransferResponse;
 import google.registry.model.transfer.TransferStatus;
@@ -79,7 +78,7 @@ public static void handlePendingTransferOnDelete(
     if (!domain.getStatusValues().contains(StatusValue.PENDING_TRANSFER)) {
       return;
     }
-    TransferData oldTransferData = domain.getTransferData();
+    DomainTransferData oldTransferData = domain.getTransferData();
     tm().delete(oldTransferData.getServerApproveEntities());
     tm().put(
             new PollMessage.OneTime.Builder()
@@ -99,8 +98,8 @@ public static void handlePendingTransferOnDelete(
    * Turn a domain into a builder with its pending transfer resolved.
    *
    * <p>This removes the {@link StatusValue#PENDING_TRANSFER} status, sets the {@link
-   * TransferStatus}, clears all the server-approve fields on the {@link TransferData}, and sets the
-   * expiration time of the last pending transfer to now.
+   * TransferStatus}, clears all the server-approve fields on the {@link DomainTransferData}, and
+   * sets the expiration time of the last pending transfer to now.
    */
   private static Domain.Builder resolvePendingTransfer(
       Domain domain, TransferStatus transferStatus, DateTime now) {
@@ -125,9 +124,9 @@ private static Domain.Builder resolvePendingTransfer(
    * Resolve a pending transfer by awarding it to the gaining client.
    *
    * <p>This removes the {@link StatusValue#PENDING_TRANSFER} status, sets the {@link
-   * TransferStatus}, clears all the server-approve fields on the {@link TransferData}, sets the new
-   * client id, and sets the last transfer time and the expiration time of the last pending transfer
-   * to now.
+   * TransferStatus}, clears all the server-approve fields on the {@link DomainTransferData}, sets
+   * the new client id, and sets the last transfer time and the expiration time of the last pending
+   * transfer to now.
    */
   public static Domain approvePendingTransfer(
       Domain domain, TransferStatus transferStatus, DateTime now) {
@@ -143,9 +142,9 @@ public static Domain approvePendingTransfer(
    * Resolve a pending transfer by denying it.
    *
    * <p>This removes the {@link StatusValue#PENDING_TRANSFER} status, sets the {@link
-   * TransferStatus}, clears all the server-approve fields on the {@link TransferData}, sets the
-   * expiration time of the last pending transfer to now, sets the last EPP update time to now, and
-   * sets the last EPP update client id to the given client id.
+   * TransferStatus}, clears all the server-approve fields on the {@link DomainTransferData}, sets
+   * the expiration time of the last pending transfer to now, sets the last EPP update time to now,
+   * and sets the last EPP update client id to the given client id.
    */
   public static Domain denyPendingTransfer(
       Domain domain, TransferStatus transferStatus, DateTime now, String lastEppUpdateRegistrarId) {

core/src/main/java/google/registry/model/billing/BillingBase.java

@@ -26,7 +26,7 @@
 import google.registry.model.annotations.IdAllocation;
 import google.registry.model.domain.DomainHistory;
 import google.registry.model.reporting.HistoryEntry.HistoryEntryId;
-import google.registry.model.transfer.TransferData.TransferServerApproveEntity;
+import google.registry.model.transfer.DomainTransferData.TransferServerApproveEntity;
 import google.registry.persistence.VKey;
 import jakarta.persistence.Column;
 import jakarta.persistence.EnumType;

core/src/main/java/google/registry/model/domain/DomainBase.java

@@ -43,7 +43,6 @@
 import com.google.gson.annotations.Expose;
 import google.registry.flows.ResourceFlowUtils;
 import google.registry.model.EppResource;
-import google.registry.model.EppResource.ResourceWithTransferData;
 import google.registry.model.billing.BillingRecurrence;
 import google.registry.model.domain.launch.LaunchNotice;
 import google.registry.model.domain.rgp.GracePeriodStatus;
@@ -96,8 +95,7 @@
 @MappedSuperclass
 @Embeddable
 @Access(AccessType.FIELD)
-public class DomainBase extends EppResource
-    implements ResourceWithTransferData<DomainTransferData> {
+public class DomainBase extends EppResource {
 
   /** The max number of years that a domain can be registered for, as set by ICANN policy. */
   public static final int MAX_REGISTRATION_YEARS = 10;
@@ -319,12 +317,10 @@ public Optional<DateTime> getAutorenewEndTime() {
     return Optional.ofNullable(autorenewEndTime.equals(END_OF_TIME) ? null : autorenewEndTime);
   }
 
-  @Override
   public DomainTransferData getTransferData() {
     return Optional.ofNullable(transferData).orElse(DomainTransferData.EMPTY);
   }
 
-  @Override
   public DateTime getLastTransferTime() {
     return lastTransferTime;
   }
@@ -605,7 +601,7 @@ public VKey<Domain> createVKey() {
 
   /** A builder for constructing {@link Domain}, since it is immutable. */
   public static class Builder<T extends DomainBase, B extends Builder<T, B>>
-      extends EppResource.Builder<T, B> implements BuilderWithTransferData<DomainTransferData, B> {
+      extends EppResource.Builder<T, B> {
 
     public Builder() {}
 
@@ -783,13 +779,11 @@ public B setAutorenewEndTime(Optional<DateTime> autorenewEndTime) {
       return thisCastToDerived();
     }
 
-    @Override
     public B setTransferData(DomainTransferData transferData) {
       getInstance().transferData = transferData;
       return thisCastToDerived();
     }
 
-    @Override
     public B setLastTransferTime(DateTime lastTransferTime) {
       getInstance().lastTransferTime = lastTransferTime;
       return thisCastToDerived();

core/src/main/java/google/registry/model/host/HostBase.java

@@ -24,7 +24,6 @@
 import com.google.common.collect.ImmutableSet;
 import google.registry.model.EppResource;
 import google.registry.model.domain.Domain;
-import google.registry.model.transfer.TransferData;
 import google.registry.persistence.VKey;
 import google.registry.persistence.converter.InetAddressSetUserType;
 import jakarta.persistence.Access;
@@ -41,8 +40,8 @@
 /**
  * A persistable Host resource including mutable and non-mutable fields.
  *
- * <p>A host's {@link TransferData} is stored on the superordinate domain. Non-subordinate hosts
- * don't carry a full set of TransferData; all they have is lastTransferTime.
+ * <p>A host's full transfer data is stored on the superordinate domain. Non-subordinate hosts don't
+ * carry a full set of TransferData; all they have is lastTransferTime.
  *
  * <p>This class deliberately does not include an {@link jakarta.persistence.Id} so that any
  * foreign-keyed fields can refer to the proper parent entity's ID, whether we're storing this in

core/src/main/java/google/registry/model/poll/PollMessage.java

@@ -32,14 +32,12 @@
 import google.registry.model.eppoutput.EppResponse.ResponseData;
 import google.registry.model.host.Host;
 import google.registry.model.host.HostHistory;
-import google.registry.model.poll.PendingActionNotificationResponse.ContactPendingActionNotificationResponse;
 import google.registry.model.poll.PendingActionNotificationResponse.DomainPendingActionNotificationResponse;
 import google.registry.model.poll.PendingActionNotificationResponse.HostPendingActionNotificationResponse;
 import google.registry.model.reporting.HistoryEntry;
 import google.registry.model.reporting.HistoryEntry.HistoryEntryId;
-import google.registry.model.transfer.TransferData.TransferServerApproveEntity;
+import google.registry.model.transfer.DomainTransferData.TransferServerApproveEntity;
 import google.registry.model.transfer.TransferResponse;
-import google.registry.model.transfer.TransferResponse.ContactTransferResponse;
 import google.registry.model.transfer.TransferResponse.DomainTransferResponse;
 import google.registry.persistence.VKey;
 import google.registry.persistence.WithVKey;
@@ -406,12 +404,8 @@ void postLoad() {
       if (pendingActionNotificationResponse != null) {
         // Promote the pending action notification response to its specialized type.
         if (contactId != null) {
-          pendingActionNotificationResponse =
-              ContactPendingActionNotificationResponse.create(
-                  pendingActionNotificationResponse.nameOrId.value,
-                  pendingActionNotificationResponse.getActionResult(),
-                  pendingActionNotificationResponse.getTrid(),
-                  pendingActionNotificationResponse.processedDate);
+          // Contacts are no longer supported
+          pendingActionNotificationResponse = null;
         } else if (domainName != null) {
           pendingActionNotificationResponse =
               DomainPendingActionNotificationResponse.create(
@@ -432,16 +426,8 @@ void postLoad() {
         // The transferResponse is currently an unspecialized TransferResponse instance, create the
         // appropriate subclass so that the value is consistently specialized
         if (contactId != null) {
-          transferResponse =
-              new ContactTransferResponse.Builder()
-                  .setContactId(contactId)
-                  .setGainingRegistrarId(transferResponse.getGainingRegistrarId())
-                  .setLosingRegistrarId(transferResponse.getLosingRegistrarId())
-                  .setTransferStatus(transferResponse.getTransferStatus())
-                  .setTransferRequestTime(transferResponse.getTransferRequestTime())
-                  .setPendingTransferExpirationTime(
-                      transferResponse.getPendingTransferExpirationTime())
-                  .build();
+          // Contacts are no longer supported
+          transferResponse = null;
         } else if (domainName != null) {
           transferResponse =
               new DomainTransferResponse.Builder()
@@ -488,9 +474,6 @@ public Builder setResponseData(ImmutableList<? extends ResponseData> responseDat
 
         // Set identifier fields based on the type of the notification response.
         if (instance.pendingActionNotificationResponse
-            instanceof ContactPendingActionNotificationResponse) {
-          instance.contactId = instance.pendingActionNotificationResponse.nameOrId.value;
-        } else if (instance.pendingActionNotificationResponse
             instanceof DomainPendingActionNotificationResponse) {
           instance.domainName = instance.pendingActionNotificationResponse.nameOrId.value;
         } else if (instance.pendingActionNotificationResponse
@@ -507,9 +490,7 @@ public Builder setResponseData(ImmutableList<? extends ResponseData> responseDat
                 .orElse(null);
 
         // Set the identifier according to the TransferResponse type.
-        if (instance.transferResponse instanceof ContactTransferResponse) {
-          instance.contactId = ((ContactTransferResponse) instance.transferResponse).getContactId();
-        } else if (instance.transferResponse instanceof DomainTransferResponse response) {
+        if (instance.transferResponse instanceof DomainTransferResponse response) {
           instance.domainName = response.getDomainName();
           instance.extendedRegistrationExpirationTime =
               response.getExtendedRegistrationExpirationTime();

core/src/main/java/google/registry/model/transfer/BaseTransferObject.java

@@ -25,7 +25,7 @@
 import jakarta.xml.bind.annotation.XmlTransient;
 import org.joda.time.DateTime;
 
-/** Fields common to {@link TransferData} and {@link TransferResponse}. */
+/** Fields common to {@link DomainTransferData} and {@link TransferResponse}. */
 @XmlTransient
 @MappedSuperclass
 public abstract class BaseTransferObject extends ImmutableObject implements UnsafeSerializable {