Supporting clearing config array when ovverriding config

1 files changed, 25 insertions, 0 deletions

diff --git a/config/src/main/java/com/yahoo/vespa/config/ConfigPayloadBuilder.java b/config/src/main/java/com/yahoo/vespa/config/ConfigPayloadBuilder.java
index bb974ddae42..88eed8cbf36 100644
--- a/config/src/main/java/com/yahoo/vespa/config/ConfigPayloadBuilder.java
+++ b/config/src/main/java/com/yahoo/vespa/config/ConfigPayloadBuilder.java
@@ -109,6 +109,27 @@ public class ConfigPayloadBuilder {
         return a;
     }
 
+    /**
+     * Check if array with this name exists.
+     *
+     * @param name Name of array.
+     * @return true if array exists, false otherwise
+     */
+    public boolean arrayExists(String name) {
+        return arrayMap.containsKey(name);
+    }
+
+    /**
+     * Clears contents of an array
+     *
+     * @param name Name of array.
+     */
+    public void clearArray(String name) {
+        Array a = arrayMap.get(name);
+        if (a != null)
+            a.clear();
+    }
+
     private void validateArray(String name) {
         if (configDefinition != null) {
             configDefinition.verify(name);
@@ -417,6 +438,10 @@ public class ConfigPayloadBuilder {
             }
             return this;
         }
+
+        public void clear() {
+            elements.clear();
+        }
     }
 
     private ConfigPayloadBuilder(ConfigPayloadBuilder other) {