Extract Function: Type parameters inference

2014-04-23 18:59:47 +04:00
parent 399c9c1175
commit 5fc1725b33
30 changed files with 469 additions and 17 deletions
@@ -125,17 +125,27 @@ public class DFS {
        }
    }

-    public static abstract class NodeHandlerWithListResult<N, R> extends AbstractNodeHandler<N, List<R>> {
+    public static abstract class CollectingNodeHandler<N, R, C extends Iterable<R>> extends AbstractNodeHandler<N, C> {
        @NotNull
-        protected final LinkedList<R> result = new LinkedList<R>();
+        protected final C result;
+
+        protected CollectingNodeHandler(@NotNull C result) {
+            this.result = result;
+        }

        @Override
        @NotNull
-        public List<R> result() {
+        public C result() {
            return result;
        }
    }

+    public static abstract class NodeHandlerWithListResult<N, R> extends CollectingNodeHandler<N, R, LinkedList<R>> {
+        protected NodeHandlerWithListResult() {
+            super(new LinkedList<R>());
+        }
+    }
+
    public static class TopologicalOrder<N> extends NodeHandlerWithListResult<N, N> {
        @Override
        public void afterChildren(N current) {