1 files changed, 6 insertions, 3 deletions

diff --git a/subprojects/store-query/src/main/java/tools/refinery/store/query/view/SymbolView.java b/subprojects/store-query/src/main/java/tools/refinery/store/query/view/SymbolView.java
index 267a99d3..cd8bd56b 100644
--- a/subprojects/store-query/src/main/java/tools/refinery/store/query/view/SymbolView.java
+++ b/subprojects/store-query/src/main/java/tools/refinery/store/query/view/SymbolView.java
@@ -21,7 +21,6 @@ import java.util.UUID;
  */
 public abstract non-sealed class SymbolView<T> implements AnySymbolView {
         private final Symbol<T> symbol;
-
         private final String viewName;
 
         protected SymbolView(Symbol<T> symbol, String viewName) {
@@ -48,7 +47,11 @@ public abstract non-sealed class SymbolView<T> implements AnySymbolView {
                 return symbol.name() + "#" + viewName;
         }
 
-        public abstract boolean filter(Tuple key, T value);
+        public final boolean filter(Tuple key, T value) {
+                return !Objects.equals(symbol.defaultValue(), value) && doFilter(key, value);
+        }
+
+        protected abstract boolean doFilter(Tuple key, T value);
 
         public abstract Object[] forwardMap(Tuple key, T value);
 
@@ -77,6 +80,6 @@ public abstract non-sealed class SymbolView<T> implements AnySymbolView {
 
         @Override
         public int hashCode() {
-                return Objects.hash(symbol, viewName);
+                return Objects.hash(getClass(), symbol, viewName);
         }
 }