1 files changed, 83 insertions, 0 deletions
diff --git a/android/olm-sdk/src/main/java/org/matrix/olm/CommonSerializeUtils.java b/android/olm-sdk/src/main/java/org/matrix/olm/CommonSerializeUtils.java
new file mode 100644
index 0000000..229963f
--- /dev/null
+++ b/android/olm-sdk/src/main/java/org/matrix/olm/CommonSerializeUtils.java
@@ -0,0 +1,83 @@
+/*
+ * Copyright 2016 OpenMarket Ltd
+ * Copyright 2016 Vector Creations Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.matrix.olm;
+
+import android.util.Log;
+
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+
+/**
+ * Helper class dedicated to serialization mechanism (template method pattern).
+ */
+abstract class CommonSerializeUtils {
+    private static final String LOG_TAG = "CommonSerializeUtils";
+
+    /**
+     * Kick off the serialization mechanism.
+     * @param aOutStream output stream for serializing
+     * @throws IOException exception
+     */
+    protected void serialize(ObjectOutputStream aOutStream) throws IOException {
+        aOutStream.defaultWriteObject();
+
+        // generate serialization key
+        byte[] key = OlmUtility.getRandomKey();
+
+        // compute pickle string
+        StringBuffer errorMsg = new StringBuffer();
+        byte[] pickledData = serialize(key, errorMsg);
+
+        if(null == pickledData) {
+            throw new OlmException(OlmException.EXCEPTION_CODE_ACCOUNT_SERIALIZATION, String.valueOf(errorMsg));
+        } else {
+            aOutStream.writeObject(new String(key, "UTF-8"));
+            aOutStream.writeObject(new String(pickledData, "UTF-8"));
+        }
+    }
+
+    /**
+     * Kick off the deserialization mechanism.
+     * @param aInStream input stream
+     * @throws Exception the exception
+     */
+    protected void deserialize(ObjectInputStream aInStream) throws Exception {
+        aInStream.defaultReadObject();
+
+        String keyAsString = (String)aInStream.readObject();
+        String pickledDataAsString = (String)aInStream.readObject();
+
+        byte[] key;
+        byte[] pickledData;
+
+        try {
+            key = keyAsString.getBytes("UTF-8");
+            pickledData = pickledDataAsString.getBytes("UTF-8");
+
+            deserialize(pickledData, key);
+        } catch (Exception e) {
+            throw new OlmException(OlmException.EXCEPTION_CODE_ACCOUNT_DESERIALIZATION, e.getMessage());
+        }
+
+        Log.d(LOG_TAG,"## deserializeObject(): success");
+    }
+
+    protected abstract byte[] serialize(byte[] aKey, StringBuffer aErrorMsg);
+    protected abstract void deserialize(byte[] aSerializedData, byte[] aKey) throws Exception;
+}