a start on EnumList

runtime/src/main/java/org/capnproto/EnumList.java

@@ -0,0 +1,34 @@
+package org.capnproto;
+
+public class EnumList {
+    static <T> T clampOrdinal(T values[], short ordinal) {
+        int index = ordinal;
+        if (ordinal < 0 || ordinal >= values.length) {
+            index = values.length - 1;
+        }
+        return values[index];
+    }
+
+    public static final class Reader<T> {
+        public final ListReader reader;
+        public final T values[];
+
+        public Reader(ListReader reader, T values[]) {
+            this.reader = reader;
+            this.values = values;
+        }
+
+        public int size() {
+            return this.reader.size();
+        }
+
+        public T get(int index) {
+            return clampOrdinal(this.values, this.reader.getShortElement(index));
+        }
+
+    }
+
+    public static final class Builder {
+
+    }
+}