--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/core/ArrayCoreMethodNode.java	Tue Jan 07 18:53:04 2014 +0100
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This
+ * code is released under a tri EPL/GPL/LGPL license. You can use it,
+ * redistribute it and/or modify it under the terms of the:
+ *
+ * Eclipse Public License version 1.0
+ * GNU General Public License version 2
+ * GNU Lesser General Public License version 2.1
+ */
+package com.oracle.truffle.ruby.nodes.core;
+
+import com.oracle.truffle.api.*;
+import com.oracle.truffle.ruby.runtime.*;
+import com.oracle.truffle.ruby.runtime.core.array.*;
+
+public abstract class ArrayCoreMethodNode extends CoreMethodNode {
+
+    public ArrayCoreMethodNode(RubyContext context, SourceSection sourceSection) {
+        super(context, sourceSection);
+    }
+
+    public ArrayCoreMethodNode(ArrayCoreMethodNode prev) {
+        super(prev);
+    }
+
+    protected boolean isEmptyStore(RubyArray receiver) {
+        return receiver.getArrayStore() instanceof EmptyArrayStore;
+    }
+
+    protected boolean isFixnumStore(RubyArray receiver) {
+        return receiver.getArrayStore() instanceof FixnumArrayStore;
+    }
+
+    protected boolean isFixnumImmutablePairStore(RubyArray receiver) {
+        return receiver.getArrayStore() instanceof FixnumImmutablePairArrayStore;
+    }
+
+    protected boolean isObjectStore(RubyArray receiver) {
+        return receiver.getArrayStore() instanceof ObjectArrayStore;
+    }
+
+    protected boolean isObjectImmutablePairStore(RubyArray receiver) {
+        return receiver.getArrayStore() instanceof ObjectImmutablePairArrayStore;
+    }
+
+}