changing ValidationListener so that all of its declared methods have a default no-op implementation

Author: erosb

core/src/main/java/org/everit/json/schema/listener/ValidationListener.java

@@ -6,55 +6,37 @@
 public interface ValidationListener {
 
     ValidationListener NOOP = new ValidationListener() {
-        @Override public void mismatch(MismatchEvent event) {
-        }
-
-        @Override public void combinedSchemaMatch(CombinedSchemaMatchEvent event) {
-        }
-
-        @Override public void combinedSchemaMismatch(CombinedSchemaMismatchEvent event) {
-        }
-
-        @Override public void schemaReferenced(SchemaReferencedEvent event) {
-        }
-
-        @Override public void ifSchemaMatch(ConditionalSchemaMatchEvent event) {
-        }
-
-        @Override public void ifSchemaMismatch(ConditionalSchemaMismatchEvent event) {
-        }
-
-        @Override public void thenSchemaMatch(ConditionalSchemaMatchEvent event) {
-        }
-
-        @Override public void thenSchemaMismatch(ConditionalSchemaMismatchEvent event) {
-        }
-
-        @Override public void elseSchemaMatch(ConditionalSchemaMatchEvent event) {
-        }
-
-        @Override public void elseSchemaMismatch(ConditionalSchemaMismatchEvent event) {
-        }
     };
 
-    void mismatch(MismatchEvent event);
+    default void mismatch(MismatchEvent event) {
+    }
+
+    default void combinedSchemaMatch(CombinedSchemaMatchEvent event) {
+    }
 
-    void combinedSchemaMatch(CombinedSchemaMatchEvent event);
+    default void combinedSchemaMismatch(CombinedSchemaMismatchEvent event) {
+    }
 
-    void combinedSchemaMismatch(CombinedSchemaMismatchEvent event);
+    default void schemaReferenced(SchemaReferencedEvent event) {
+    }
 
-    void schemaReferenced(SchemaReferencedEvent event);
+    default void ifSchemaMatch(ConditionalSchemaMatchEvent event) {
+    }
 
-    void ifSchemaMatch(ConditionalSchemaMatchEvent event);
+    default void ifSchemaMismatch(ConditionalSchemaMismatchEvent event) {
+    }
 
-    void ifSchemaMismatch(ConditionalSchemaMismatchEvent event);
+    default void thenSchemaMatch(ConditionalSchemaMatchEvent event) {
+    }
 
-    void thenSchemaMatch(ConditionalSchemaMatchEvent event);
+    default void thenSchemaMismatch(ConditionalSchemaMismatchEvent event) {
+    }
 
-    void thenSchemaMismatch(ConditionalSchemaMismatchEvent event);
+    default void elseSchemaMatch(ConditionalSchemaMatchEvent event) {
 
-    void elseSchemaMatch(ConditionalSchemaMatchEvent event);
+    }
 
-    void elseSchemaMismatch(ConditionalSchemaMismatchEvent event);
+    default void elseSchemaMismatch(ConditionalSchemaMismatchEvent event) {
+    }
 }