AntiEntropy sketch + required Serializer work
Change-Id: Ibac5f4eede6b420202683114c3262e01b7264eff
diff --git a/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/ImmutableMapSerializer.java b/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/ImmutableMapSerializer.java
new file mode 100644
index 0000000..244cc57
--- /dev/null
+++ b/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/ImmutableMapSerializer.java
@@ -0,0 +1,49 @@
+package org.onlab.onos.store.serializers;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.onlab.util.KryoPool.FamilySerializer;
+
+import com.esotericsoftware.kryo.Kryo;
+import com.esotericsoftware.kryo.io.Input;
+import com.esotericsoftware.kryo.io.Output;
+import com.esotericsoftware.kryo.serializers.MapSerializer;
+import com.google.common.collect.ImmutableMap;
+
+/**
+* Kryo Serializer for {@link ImmutableMap}.
+*/
+public class ImmutableMapSerializer extends FamilySerializer<ImmutableMap<?, ?>> {
+
+ private final MapSerializer mapSerializer = new MapSerializer();
+
+ public ImmutableMapSerializer() {
+ // non-null, immutable
+ super(false, true);
+ }
+
+ @Override
+ public void write(Kryo kryo, Output output, ImmutableMap<?, ?> object) {
+ // wrapping with unmodifiableMap proxy
+ // to avoid Kryo from writing only the reference marker of this instance,
+ // which will be embedded right before this method call.
+ kryo.writeObject(output, Collections.unmodifiableMap(object), mapSerializer);
+ }
+
+ @Override
+ public ImmutableMap<?, ?> read(Kryo kryo, Input input,
+ Class<ImmutableMap<?, ?>> type) {
+ Map<?, ?> map = kryo.readObject(input, HashMap.class, mapSerializer);
+ return ImmutableMap.copyOf(map);
+ }
+
+ @Override
+ public void registerFamilies(Kryo kryo) {
+ kryo.register(ImmutableMap.of().getClass(), this);
+ kryo.register(ImmutableMap.of(1, 2).getClass(), this);
+ kryo.register(ImmutableMap.of(1, 2, 3, 4).getClass(), this);
+ // TODO register required ImmutableMap variants
+ }
+}