HONEYCOMB-270 Add isPresent() to Readers/Customizers

So that they can influence whether empty data is to be considered as present

+ Move registries implementations from util to impl
+ Introduce DelegatingReader trait
+ Extend GenericReader where possible to reduce duplication

Change-Id: I5a416acd0c4eab1fbc30fcbe585719991dbe9215
Signed-off-by: Maros Marsalek <mmarsale@cisco.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/infra/it/benchmark/src/main/java/io/fd/honeycomb/benchmark/util/StaticReader.java b/infra/it/benchmark/src/main/java/io/fd/honeycomb/benchmark/util/StaticReader.java
index 90e560152..76ad0e3d4 100644
--- a/infra/it/benchmark/src/main/java/io/fd/honeycomb/benchmark/util/StaticReader.java
+++ b/infra/it/benchmark/src/main/java/io/fd/honeycomb/benchmark/util/StaticReader.java
@@ -55,6 +55,11 @@ public final class StaticReader<T extends DataObject, B extends Builder<T>> impl
                 '}';
     }
 
+    @Override
+    public boolean isPresent(final InstanceIdentifier<T> id, final T built, final ReadContext ctx) {
+        return true;
+    }
+
     @Nonnull
     @Override
     public Optional<? extends DataObject> read(@Nonnull final InstanceIdentifier<? extends DataObject> id,