Rename DomainNameUtils method to getTldFromSld

This is broken out from []
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=121599268

java/google/registry/dns/DnsQueue.java

@@ -21,7 +21,7 @@ import static google.registry.dns.DnsConstants.DNS_TARGET_NAME_PARAM;
 import static google.registry.dns.DnsConstants.DNS_TARGET_TYPE_PARAM;
 import static google.registry.model.registry.Registries.assertTldExists;
 import static google.registry.request.RequestParameters.PARAM_TLD;
-import static google.registry.util.DomainNameUtils.getTldFromDomainName;
+import static google.registry.util.DomainNameUtils.getTldFromSld;
 import static java.util.concurrent.TimeUnit.MILLISECONDS;
 
 import com.google.appengine.api.taskqueue.Queue;
@@ -91,7 +91,7 @@ public class DnsQueue {
     return addToQueue(
         TargetType.DOMAIN,
         fullyQualifiedDomainName,
-        assertTldExists(getTldFromDomainName(fullyQualifiedDomainName)));
+        assertTldExists(getTldFromSld(fullyQualifiedDomainName)));
   }
 
   /** Adds a task to the queue to refresh the DNS information for the specified zone. */

java/google/registry/flows/domain/DomainCheckFlow.java

@@ -19,7 +19,7 @@ import static google.registry.flows.domain.DomainFlowUtils.handleFeeRequest;
 import static google.registry.model.EppResourceUtils.checkResourcesExist;
 import static google.registry.model.registry.label.ReservationType.UNRESERVED;
 import static google.registry.util.CollectionUtils.nullToEmpty;
-import static google.registry.util.DomainNameUtils.getTldFromDomainName;
+import static google.registry.util.DomainNameUtils.getTldFromSld;
 
 import com.google.common.collect.ImmutableList;
 import com.google.common.net.InternetDomainName;
@@ -114,7 +114,7 @@ public class DomainCheckFlow extends BaseDomainCheckFlow {
         throw new OnlyCheckedNamesCanBeFeeCheckedException();
       }
       FeeCheck.Builder builder = new FeeCheck.Builder();
-      handleFeeRequest(domainCheck, builder, domainName, getTldFromDomainName(domainName), now);
+      handleFeeRequest(domainCheck, builder, domainName, getTldFromSld(domainName), now);
       feeChecksBuilder.add(builder.setName(domainName).build());
     }
     return ImmutableList.of(FeeCheckResponseExtension.create(feeChecksBuilder.build()));

java/google/registry/model/domain/DomainBase.java

@@ -22,7 +22,7 @@ import static google.registry.model.domain.DesignatedContact.Type.REGISTRANT;
 import static google.registry.util.CollectionUtils.nullToEmptyImmutableCopy;
 import static google.registry.util.CollectionUtils.nullToEmptyImmutableSortedCopy;
 import static google.registry.util.CollectionUtils.union;
-import static google.registry.util.DomainNameUtils.getTldFromDomainName;
+import static google.registry.util.DomainNameUtils.getTldFromSld;
 
 import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.ImmutableSortedSet;
@@ -228,7 +228,7 @@ public abstract class DomainBase extends EppResource {
       T instance = getInstance();
       checkState(
           !isNullOrEmpty(instance.fullyQualifiedDomainName), "Missing fullyQualifiedDomainName");
-      instance.tld = getTldFromDomainName(instance.fullyQualifiedDomainName);
+      instance.tld = getTldFromSld(instance.fullyQualifiedDomainName);
       instance.allContacts = instance.registrant == null ? instance.contacts : union(
           instance.getContacts(), DesignatedContact.create(REGISTRANT, instance.registrant));
       return super.build();

java/google/registry/model/registry/Registries.java

@@ -92,7 +92,7 @@ public final class Registries {
    *
    * <p><b>Note:</b> This routine will only work on names under TLDs for which this registry is
    * authoritative. To extract TLDs from domains (not hosts) that other registries control, use
-   * {@link google.registry.util.DomainNameUtils#getTldFromDomainName(String)
+   * {@link google.registry.util.DomainNameUtils#getTldFromSld(String)
    * DomainNameUtils#getTldFromDomainName}.
    *
    * @param domainName domain name or host name (but not TLD) under an authoritative TLD

java/google/registry/ui/server/api/CheckApiServlet.java

@@ -20,7 +20,7 @@ import static com.google.common.net.HttpHeaders.ACCESS_CONTROL_ALLOW_ORIGIN;
 import static google.registry.model.eppcommon.ProtocolDefinition.ServiceExtension.FEE_0_6;
 import static google.registry.ui.server.SoyTemplateUtils.createTofuSupplier;
 import static google.registry.util.DomainNameUtils.canonicalizeDomainName;
-import static google.registry.util.DomainNameUtils.getTldFromDomainName;
+import static google.registry.util.DomainNameUtils.getTldFromSld;
 import static java.nio.charset.StandardCharsets.UTF_8;
 import static org.json.simple.JSONValue.toJSONString;
 
@@ -89,7 +89,7 @@ public class CheckApiServlet extends HttpServlet {
     try {
       domainString = canonicalizeDomainName(nullToEmpty(domainString));
       // Validate the TLD.
-      getTldFromDomainName(domainString);
+      getTldFromSld(domainString);
     } catch (IllegalStateException | IllegalArgumentException e) {
       return fail("Must supply a valid second level domain name");
     }

java/google/registry/util/DomainNameUtils.java

@@ -15,6 +15,7 @@
 package google.registry.util;
 
 import static com.google.common.base.Preconditions.checkArgument;
+import static google.registry.util.PreconditionsUtils.checkArgumentNotNull;
 
 import com.google.common.base.Ascii;
 import com.google.common.base.Strings;
@@ -42,8 +43,8 @@ public final class DomainNameUtils {
   }
 
   /**
-   * Returns the canonicalized TLD part of a valid domain name (just an SLD, no subdomains) by
-   * stripping off the leftmost part.
+   * Returns the canonicalized TLD part of a valid second level domain name by stripping off the
+   * leftmost part.
    *
    * <p>This function is compatible with multi-part tlds, e.g. {@code co.uk}. This function will
    * also work on domains for which the registry is not authoritative. If you are certain that the
@@ -51,16 +52,26 @@ public final class DomainNameUtils {
    * {@link google.registry.model.registry.Registries#findTldForName(InternetDomainName)
    * Registries#findTldForName}, which will work on hostnames in addition to domains.
    *
-   * @param fullyQualifiedDomainName must be a punycode SLD (not a host or unicode)
+   * @param sld must be a punycode SLD (not a host or unicode)
    * @throws IllegalArgumentException if there is no TLD
    */
-  public static String getTldFromDomainName(String fullyQualifiedDomainName) {
-    checkArgument(
-        !Strings.isNullOrEmpty(fullyQualifiedDomainName),
-        "fullyQualifiedDomainName cannot be null or empty");
-    InternetDomainName domainName = InternetDomainName.from(fullyQualifiedDomainName);
-    checkArgument(domainName.hasParent(), "fullyQualifiedDomainName does not have a TLD");
-    return domainName.parent().toString();
+  public static String getTldFromSld(String sld) {
+    checkArgument(!Strings.isNullOrEmpty(sld), "secondLevelDomainName cannot be null or empty");
+    return getTldFromSld(InternetDomainName.from(sld));
+  }
+
+  /**
+   * Returns the canonicalized TLD part of a valid second level domain name by stripping off the
+   * leftmost part.
+   *
+   * <p>This function is compatible with multi-part tlds.
+   *
+   * @throws IllegalArgumentException if there is no TLD
+   */
+  public static String getTldFromSld(InternetDomainName sld) {
+    checkArgumentNotNull(sld);
+    checkArgument(sld.hasParent(), "secondLevelDomainName does not have a TLD");
+    return sld.parent().toString();
   }
 
   private DomainNameUtils() {}