use autovalue for CryptoInputParcel

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/ByteMapParcelAdapter.java

@@ -0,0 +1,35 @@
+package org.sufficientlysecure.keychain.util;
+
+
+import java.nio.ByteBuffer;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+
+import android.os.Parcel;
+
+import com.ryanharter.auto.value.parcel.TypeAdapter;
+
+
+public class ByteMapParcelAdapter implements TypeAdapter<Map<ByteBuffer,byte[]>> {
+    @Override
+    public Map<ByteBuffer, byte[]> fromParcel(Parcel source) {
+        int count = source.readInt();
+        Map<ByteBuffer,byte[]> result = new HashMap<>(count);
+        for (int i = 0; i < count; i++) {
+            byte[] key = source.createByteArray();
+            byte[] value = source.createByteArray();
+            result.put(ByteBuffer.wrap(key), value);
+        }
+        return Collections.unmodifiableMap(result);
+    }
+
+    @Override
+    public void toParcel(Map<ByteBuffer, byte[]> value, Parcel dest) {
+        dest.writeInt(value.size());
+        for (Map.Entry<ByteBuffer, byte[]> entry : value.entrySet()) {
+            dest.writeByteArray(entry.getKey().array());
+            dest.writeByteArray(entry.getValue());
+        }
+    }
+}