stash in case needed in future

Author: cowtowncoder

attic/ImmutableBitSet.java

@@ -0,0 +1,85 @@
+package com.fasterxml.jackson.databind.util;
+
+import java.util.BitSet;
+
+public class ImmutableBitSet extends BitSet
+{
+    private static final long serialVersionUID = 1L;
+
+    private ImmutableBitSet(BitSet bits) {
+        super();
+        _parentOr(bits);
+    }
+
+    public static ImmutableBitSet of(BitSet bits) {
+        return new ImmutableBitSet(bits);
+    }
+
+    private void _parentOr(BitSet set) {
+        super.or(set);
+    }
+    
+    @Override
+    public void and(BitSet set) {
+        _failMutableOperation();
+    }
+
+    @Override
+    public void andNot(BitSet set) {
+        _failMutableOperation();
+    }
+
+    @Override
+    public void or(BitSet set) {
+        _failMutableOperation();
+    }
+
+    @Override
+    public void xor(BitSet set) {
+        _failMutableOperation();
+    }
+
+    @Override
+    public void clear() {
+        _failMutableOperation();
+    }
+
+    @Override
+    public void clear(int ix) {
+        _failMutableOperation();
+    }
+
+    @Override
+    public void clear(int from, int to) {
+        _failMutableOperation();
+    }
+
+    @Override
+    public void flip(int bitIndex) {
+        _failMutableOperation();
+    }
+
+    @Override
+    public void flip(int from, int to) {
+        _failMutableOperation();
+    }
+
+    @Override
+    public void set(int bitIndex) {
+        _failMutableOperation();
+    }
+
+    @Override
+    public void set(int bitIndex, boolean state) {
+        _failMutableOperation();
+    }
+
+    @Override
+    public void set(int from, int to) {
+        _failMutableOperation();
+    }
+
+    private void _failMutableOperation() {
+        throw new UnsupportedOperationException("ImmutableBitSet does not support modification");
+    }
+}