add convenience function wrapping "String.format(Locale.US, ...)"

3 files changed, 10 insertions, 1 deletions

diff --git a/vespajlib/abi-spec.json b/vespajlib/abi-spec.json
index c0ac0d0f3be..4a7007ebf83 100644
--- a/vespajlib/abi-spec.json
+++ b/vespajlib/abi-spec.json
@@ -3098,7 +3098,8 @@
       "public static java.util.OptionalInt validateTextString(java.lang.String)",
       "public static boolean isDisplayable(int)",
       "public static java.lang.String stripInvalidCharacters(java.lang.String)",
-      "public static java.lang.String truncate(java.lang.String, int)"
+      "public static java.lang.String truncate(java.lang.String, int)",
+      "public static varargs java.lang.String fmt(java.lang.String, java.lang.Object[])"
     ],
     "fields": []
   },
diff --git a/vespajlib/src/main/java/com/yahoo/text/Text.java b/vespajlib/src/main/java/com/yahoo/text/Text.java
index 85b28639d89..4b1ee57b47d 100644
--- a/vespajlib/src/main/java/com/yahoo/text/Text.java
+++ b/vespajlib/src/main/java/com/yahoo/text/Text.java
@@ -1,6 +1,7 @@
 // Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
 package com.yahoo.text;
 
+import java.util.Locale;
 import java.util.OptionalInt;
 
 /**
@@ -186,4 +187,7 @@ public final class Text {
         return s.substring(0, length - 4) + " ...";
     }
 
+    public static String fmt(String format, Object... args) {
+	return String.format(Locale.US, format, args);
+    }
 }
diff --git a/vespajlib/src/test/java/com/yahoo/text/TextTestCase.java b/vespajlib/src/test/java/com/yahoo/text/TextTestCase.java
index 8bb8b2aaad5..83ac6342e70 100644
--- a/vespajlib/src/test/java/com/yahoo/text/TextTestCase.java
+++ b/vespajlib/src/test/java/com/yahoo/text/TextTestCase.java
@@ -72,4 +72,8 @@ public class TextTestCase {
         assertEquals("a ...", Text.truncate("ab cde", 5));
     }
 
+    @Test
+    public void testFormat() {
+	assertEquals("foo 3.14", Text.fmt("%s %.2f", "foo", 3.1415926536));
+    }
 }