1 files changed, 23 insertions, 0 deletions
diff --git a/libraries/spongycastle/core/src/main/java/org/spongycastle/util/Memoable.java b/libraries/spongycastle/core/src/main/java/org/spongycastle/util/Memoable.java
new file mode 100644
index 000000000..75280e5a2
--- /dev/null
+++ b/libraries/spongycastle/core/src/main/java/org/spongycastle/util/Memoable.java
@@ -0,0 +1,23 @@
+package org.spongycastle.util;
+
+public interface Memoable
+{
+    /**
+     * Produce a copy of this object with its configuration and in its current state.
+     * <p/>
+     * The returned object may be used simply to store the state, or may be used as a similar object
+     * starting from the copied state.
+     */
+    public Memoable copy();
+
+    /**
+     * Restore a copied object state into this object.
+     * <p/>
+     * Implementations of this method <em>should</em> try to avoid or minimise memory allocation to perform the reset.
+     *
+     * @param other an object originally {@link #copy() copied} from an object of the same type as this instance.
+     * @throws ClassCastException if the provided object is not of the correct type.
+     * @throws MemoableResetException if the <b>other</b> parameter is in some other way invalid.
+     */
+    public void reset(Memoable other);
+}