Add `addAll`

2 files changed, 27 insertions, 0 deletions

diff --git a/vespajlib/src/main/java/ai/vespa/json/Json.java b/vespajlib/src/main/java/ai/vespa/json/Json.java
index fef6e2e988e..242f8946162 100644
--- a/vespajlib/src/main/java/ai/vespa/json/Json.java
+++ b/vespajlib/src/main/java/ai/vespa/json/Json.java
@@ -222,6 +222,10 @@ public class Json implements Iterable<Json> {
                 SlimeUtils.addValue(json.inspector, cursor); return this;
             }
             public Builder.Array add(Json.Builder builder) { return add(builder.build()); }
+            /** Add all values from {@code array} to this array. */
+            public Builder.Array addAll(Json.Builder.Array array) {
+                SlimeUtils.copyArray(array.cursor, cursor); return this;
+            }
 
             /** Note: does not return {@code this}! */
             public Builder.Array addArray() { return new Array(cursor.addArray()); }
diff --git a/vespajlib/src/test/java/ai/vespa/json/JsonTest.java b/vespajlib/src/test/java/ai/vespa/json/JsonTest.java
index 51b64637fd8..5183366e12e 100644
--- a/vespajlib/src/test/java/ai/vespa/json/JsonTest.java
+++ b/vespajlib/src/test/java/ai/vespa/json/JsonTest.java
@@ -130,4 +130,27 @@ class JsonTest {
                 .toJson(true);
         assertEquals(expected, json);
     }
+
+    @Test
+    void add_all() {
+        var expected =
+                """
+                [
+                  1,
+                  2,
+                  3,
+                  4,
+                  5,
+                  6
+                ]
+                """;
+        var json = Json.Builder.newArray()
+                .addAll(Json.Builder.Array.newArray().add(1).add(2).add(3))
+                .add(4)
+                .addAll(Json.Builder.Array.newArray().add(5))
+                .add(6)
+                .build()
+                .toJson(true);
+        assertEquals(expected, json);
+    }
 }