1 files changed, 51 insertions, 0 deletions
diff --git a/src/main/java/org/whispersystems/libaxolotl/util/Pair.java b/src/main/java/org/whispersystems/libaxolotl/util/Pair.java
new file mode 100644
index 00000000..0476d932
--- /dev/null
+++ b/src/main/java/org/whispersystems/libaxolotl/util/Pair.java
@@ -0,0 +1,51 @@
+/**
+ * Copyright (C) 2014 Open WhisperSystems
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.whispersystems.libaxolotl.util;
+
+public class Pair<T1, T2> {
+  private final T1 v1;
+  private final T2 v2;
+
+  public Pair(T1 v1, T2 v2) {
+    this.v1 = v1;
+    this.v2 = v2;
+  }
+
+  public T1 first(){
+    return v1;
+  }
+
+  public T2 second(){
+    return v2;
+  }
+
+  public boolean equals(Object o) {
+    return o instanceof Pair &&
+        equal(((Pair) o).first(), first()) &&
+        equal(((Pair) o).second(), second());
+  }
+
+  public int hashCode() {
+    return first().hashCode() ^ second().hashCode();
+  }
+
+  private boolean equal(Object first, Object second) {
+    if (first == null && second == null) return true;
+    if (first == null || second == null) return false;
+    return first.equals(second);
+  }
+}