Add DelpoymentSpec.empty

1 files changed, 6 insertions, 1 deletions

diff --git a/config-model-api/src/main/java/com/yahoo/config/application/api/DeploymentSpec.java b/config-model-api/src/main/java/com/yahoo/config/application/api/DeploymentSpec.java
index d54437772e6..3b8adce8aad 100644
--- a/config-model-api/src/main/java/com/yahoo/config/application/api/DeploymentSpec.java
+++ b/config-model-api/src/main/java/com/yahoo/config/application/api/DeploymentSpec.java
@@ -19,11 +19,16 @@ import java.util.Optional;
  * Specifies the environments and regions to which an application should be deployed.
  * This may be used both for inspection as part of an application model and to answer
  * queries about deployment from the command line. A main method is included for the latter usage.
+ * 
+ * This is immutable.
  *
  * @author bratseth
  */
 public class DeploymentSpec {
 
+    /** The empty deployment spec, specifying no zones or rotation, and defaults for all settings */
+    public static final DeploymentSpec empty = new DeploymentSpec(Optional.empty(), UpgradePolicy.defaultPolicy, ImmutableList.of());
+    
     private final Optional<String> globalServiceId;
     private final UpgradePolicy upgradePolicy;
     private final List<DeclaredZone> zones;
@@ -84,7 +89,7 @@ public class DeploymentSpec {
         }
         return new DeploymentSpec(globalServiceId, readUpgradePolicy(root), zones);
     }
-
+    
     private static boolean isEnvironmentName(String tagName) {
         return tagName.equals("test") || tagName.equals("staging") || tagName.equals("prod");
     }