Add DomainName.leafLabel()

2 files changed, 9 insertions, 0 deletions

diff --git a/vespajlib/src/main/java/ai/vespa/http/DomainName.java b/vespajlib/src/main/java/ai/vespa/http/DomainName.java
index fa6964002bc..51ae9c12036 100644
--- a/vespajlib/src/main/java/ai/vespa/http/DomainName.java
+++ b/vespajlib/src/main/java/ai/vespa/http/DomainName.java
@@ -32,4 +32,9 @@ public class DomainName extends PatternedStringWrapper<DomainName> {
         return requireMatch(label, "domain name label", labelPattern);
     }
 
+    public String leafLabel() {
+        int offset = value().lastIndexOf('.');
+        return offset == -1 ? value() : value().substring(0, offset);
+    }
+
 }
diff --git a/vespajlib/src/test/java/ai/vespa/http/DomainNameTest.java b/vespajlib/src/test/java/ai/vespa/http/DomainNameTest.java
index ed7650d2929..f3c9b70b7db 100644
--- a/vespajlib/src/test/java/ai/vespa/http/DomainNameTest.java
+++ b/vespajlib/src/test/java/ai/vespa/http/DomainNameTest.java
@@ -3,6 +3,7 @@ package ai.vespa.http;
 
 import org.junit.jupiter.api.Test;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 
 /**
@@ -30,6 +31,9 @@ class DomainNameTest {
         assertThrows(IllegalArgumentException.class, () -> DomainName.of("foo%"));
         assertThrows(IllegalArgumentException.class, () -> DomainName.of(("." + "a".repeat(32)).repeat(8).substring(1, 257)));
         assertThrows(IllegalArgumentException.class, () -> DomainName.of("a".repeat(64)));
+
+        assertEquals("foo", DomainName.of("foo").leafLabel());
+        assertEquals("foo", DomainName.of("foo.com").leafLabel());
     }
 
 }