1 files changed, 23 insertions, 0 deletions
diff --git a/core/src/main/java/org/bouncycastle/asn1/eac/BidirectionalMap.java b/core/src/main/java/org/bouncycastle/asn1/eac/BidirectionalMap.java
new file mode 100644
index 00000000..3cf14503
--- /dev/null
+++ b/core/src/main/java/org/bouncycastle/asn1/eac/BidirectionalMap.java
@@ -0,0 +1,23 @@
+package org.bouncycastle.asn1.eac;
+
+import java.util.Hashtable;
+
+public class BidirectionalMap
+    extends Hashtable
+{
+    private static final long serialVersionUID = -7457289971962812909L;
+
+    Hashtable reverseMap = new Hashtable();
+
+    public Object getReverse(Object o)
+    {
+        return reverseMap.get(o);
+    }
+
+    public Object put(Object key, Object o)
+    {
+        reverseMap.put(o, key);
+        return super.put(key, o);
+    }
+
+}