| 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 |
| } |
| } |