Remove empty() method in ArtifactMetadata

2 files changed, 11 insertions, 5 deletions

diff --git a/src/api/java/com/amadornes/artifactural/api/artifact/ArtifactMetadata.java b/src/api/java/com/amadornes/artifactural/api/artifact/ArtifactMetadata.java
index 1dcd838..36fb1a5 100644
--- a/src/api/java/com/amadornes/artifactural/api/artifact/ArtifactMetadata.java
+++ b/src/api/java/com/amadornes/artifactural/api/artifact/ArtifactMetadata.java
@@ -2,10 +2,6 @@ package com.amadornes.artifactural.api.artifact;
 
 public interface ArtifactMetadata {
 
-    static ArtifactMetadata empty() {
-        return (ArtifactMetadata) null;
-    }
-
     ArtifactMetadata with(String key, String value);
 
     String getHash();
diff --git a/src/api/java/com/amadornes/artifactural/api/artifact/Internal.java b/src/api/java/com/amadornes/artifactural/api/artifact/Internal.java
index 9401b00..c7fd883 100644
--- a/src/api/java/com/amadornes/artifactural/api/artifact/Internal.java
+++ b/src/api/java/com/amadornes/artifactural/api/artifact/Internal.java
@@ -46,7 +46,17 @@ final class Internal {
 
         @Override
         public ArtifactMetadata getMetadata() {
-            return ArtifactMetadata.empty();
+            return new ArtifactMetadata() {
+                @Override
+                public ArtifactMetadata with(String key, String value) {
+                    throw new UnsupportedOperationException();
+                }
+
+                @Override
+                public String getHash() {
+                    return "ERROR";
+                }
+            };
         }
 
         @Override