Revert "Remove dead code" (#18453)

1 files changed, 44 insertions, 0 deletions

diff --git a/config-model-api/src/main/java/com/yahoo/config/application/api/ValidationOverrides.java b/config-model-api/src/main/java/com/yahoo/config/application/api/ValidationOverrides.java
index af3cf4175cf..42a47781251 100644
--- a/config-model-api/src/main/java/com/yahoo/config/application/api/ValidationOverrides.java
+++ b/config-model-api/src/main/java/com/yahoo/config/application/api/ValidationOverrides.java
@@ -19,6 +19,7 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
+import java.util.logging.Level;
 import java.util.stream.Collectors;
 
 /**
@@ -33,6 +34,9 @@ public class ValidationOverrides {
 
     public static final ValidationOverrides empty = new ValidationOverrides(ImmutableList.of(), "<validation-overrides/>");
 
+    /** A special instance which behaves as if it contained a valid allow override for every (valid) validation id */
+    public static final ValidationOverrides all = new AllowAllValidationOverrides();
+
     private final List<Allow> overrides;
 
     private final String xmlForm;
@@ -176,4 +180,44 @@ public class ValidationOverrides {
 
     }
 
+    // TODO: Remove this class after June 2021
+    public static class AllowAllValidationOverrides extends ValidationOverrides {
+
+        private final DeployLogger logger;
+        private final ValidationOverrides wrapped;
+
+        /** Create an instance of this which doesn't log */
+        public AllowAllValidationOverrides() {
+            this(null, null);
+        }
+
+        /** Creates an instance of this which logs what is allows to the given deploy logger */
+        public AllowAllValidationOverrides(ValidationOverrides wrapped, DeployLogger logger) {
+            super(List.of());
+            this.wrapped = wrapped;
+            this.logger = logger;
+        }
+
+        @Override
+        public void invalid(ValidationId validationId, String message, Instant now) {
+            // Log if would otherwise be invalid
+            if (wrapped != null && logger != null && ! wrapped.allows(validationId, now))
+                logger.log(Level.WARNING, "Possibly destructive change '" + validationId + "' allowed");
+        }
+
+        /** Returns whether the given (assumed invalid) change is allowed by this at the moment */
+        @Override
+        public boolean allows(ValidationId validationId, Instant now) {
+            return true;
+        }
+
+        /** Returns the XML form of this, or null if it was not created by fromXml, nor is empty */
+        @Override
+        public String xmlForm() { return null; }
+
+        @Override
+        public String toString() { return "(A validation override which allows everything)"; }
+
+    }
+
 }