1 files changed, 42 insertions, 0 deletions
diff --git a/java/src/main/java/org/whispersystems/libaxolotl/state/impl/InMemoryPreKeyStore.java b/java/src/main/java/org/whispersystems/libaxolotl/state/impl/InMemoryPreKeyStore.java
new file mode 100644
index 00000000..80651f21
--- /dev/null
+++ b/java/src/main/java/org/whispersystems/libaxolotl/state/impl/InMemoryPreKeyStore.java
@@ -0,0 +1,42 @@
+package org.whispersystems.libaxolotl.state.impl;
+
+import org.whispersystems.libaxolotl.InvalidKeyIdException;
+import org.whispersystems.libaxolotl.state.PreKeyRecord;
+import org.whispersystems.libaxolotl.state.PreKeyStore;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+
+public class InMemoryPreKeyStore implements PreKeyStore {
+
+  private final Map<Integer, byte[]> store = new HashMap<>();
+
+  @Override
+  public PreKeyRecord loadPreKey(int preKeyId) throws InvalidKeyIdException {
+    try {
+      if (!store.containsKey(preKeyId)) {
+        throw new InvalidKeyIdException("No such prekeyrecord!");
+      }
+
+      return new PreKeyRecord(store.get(preKeyId));
+    } catch (IOException e) {
+      throw new AssertionError(e);
+    }
+  }
+
+  @Override
+  public void storePreKey(int preKeyId, PreKeyRecord record) {
+    store.put(preKeyId, record.serialize());
+  }
+
+  @Override
+  public boolean containsPreKey(int preKeyId) {
+    return store.containsKey(preKeyId);
+  }
+
+  @Override
+  public void removePreKey(int preKeyId) {
+    store.remove(preKeyId);
+  }
+}