Revert "Merge pull request #22065 from vespa-engine/revert-22049-jonmv/unify-hostname-classes"

This reverts commit 4ffc54339186574491a32b3166223c3fc50ba8fe, reversing
changes made to db9e570a36decb24e6cb13f44bd0ff444ab762e3.

4 files changed, 8 insertions, 11 deletions

diff --git a/vespajlib/abi-spec.json b/vespajlib/abi-spec.json
index ae69564b671..45f7e395da6 100644
--- a/vespajlib/abi-spec.json
+++ b/vespajlib/abi-spec.json
@@ -350,7 +350,7 @@
     "fields": []
   },
   "com.yahoo.net.HostName": {
-    "superClass": "ai.vespa.validation.PatternedStringWrapper",
+    "superClass": "ai.vespa.http.DomainName",
     "interfaces": [],
     "attributes": [
       "public"
diff --git a/vespajlib/src/main/java/ai/vespa/http/DomainName.java b/vespajlib/src/main/java/ai/vespa/http/DomainName.java
index a566f5b95be..737f6b6d863 100644
--- a/vespajlib/src/main/java/ai/vespa/http/DomainName.java
+++ b/vespajlib/src/main/java/ai/vespa/http/DomainName.java
@@ -15,12 +15,12 @@ import static ai.vespa.validation.Validation.requireMatch;
  */
 public class DomainName extends PatternedStringWrapper<DomainName> {
 
-    static final Pattern labelPattern = Pattern.compile("([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9-]{0,61}[A-Za-z0-9])");
-    static final Pattern domainNamePattern = Pattern.compile("(" + labelPattern + "\\.)*" + labelPattern);
+    protected static final Pattern labelPattern = Pattern.compile("([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9-]{0,61}[A-Za-z0-9])");
+    protected static final Pattern domainNamePattern = Pattern.compile("(" + labelPattern + "\\.)*" + labelPattern);
 
     public static final DomainName localhost = DomainName.of("localhost");
 
-    private DomainName(String value) {
+    protected DomainName(String value) {
         super(requireLength(value, "domain name length", 1, 255), domainNamePattern, "domain name");
     }
 
diff --git a/vespajlib/src/main/java/ai/vespa/validation/StringWrapper.java b/vespajlib/src/main/java/ai/vespa/validation/StringWrapper.java
index 0937627b57e..12be0002f6f 100644
--- a/vespajlib/src/main/java/ai/vespa/validation/StringWrapper.java
+++ b/vespajlib/src/main/java/ai/vespa/validation/StringWrapper.java
@@ -40,7 +40,7 @@ public abstract class StringWrapper<T extends StringWrapper<T>> implements Compa
     @Override
     public final boolean equals(Object o) {
         if (this == o) return true;
-        if (o == null || getClass() != o.getClass()) return false;
+        if ( ! (o instanceof StringWrapper<?>)) return false;
         return value.equals(((StringWrapper<?>) o).value);
     }
 
diff --git a/vespajlib/src/main/java/com/yahoo/net/HostName.java b/vespajlib/src/main/java/com/yahoo/net/HostName.java
index 20f1008055e..0348197a704 100644
--- a/vespajlib/src/main/java/com/yahoo/net/HostName.java
+++ b/vespajlib/src/main/java/com/yahoo/net/HostName.java
@@ -10,7 +10,7 @@ import java.util.regex.Pattern;
 import static ai.vespa.validation.Validation.requireLength;
 
 /**
- * Hostnames match {@link #hostNamePattern}, and are restricted to 64 characters in length.
+ * Hostnames match {@link #domainNamePattern}, and are restricted to 64 characters in length.
  *
  * This class also has utilities for getting the hostname of the system running the JVM.
  * Detection of the hostname is now done before starting any Vespa
@@ -20,15 +20,12 @@ import static ai.vespa.validation.Validation.requireLength;
  * @author arnej
  * @author jonmv
  */
-public class HostName extends PatternedStringWrapper<HostName> {
-
-    static final Pattern labelPattern = Pattern.compile("([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9-]{0,61}[A-Za-z0-9])");
-    static final Pattern hostNamePattern = Pattern.compile("(" + labelPattern + "\\.)*" + labelPattern);
+public class HostName extends DomainName {
 
     private static HostName preferredHostName = null;
 
     private HostName(String value) {
-        super(requireLength(value, "hostname length", 1, 64), hostNamePattern, "hostname");
+        super(requireLength(value, "hostname length", 1, 64));
     }
 
     public static HostName of(String value) {