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Additional kryo (http://kryo.googlecode.com) serializers for standard jdk types (e.g. currency, jdk proxies) and some for external libs (e.g. joda time, cglib proxies, wicket).

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package de.javakaffee.kryoserializers.guava;

import com.esotericsoftware.kryo.Kryo;
import com.esotericsoftware.kryo.Serializer;
import com.esotericsoftware.kryo.io.Input;
import com.esotericsoftware.kryo.io.Output;
import com.google.common.collect.ImmutableSortedMap;
import com.google.common.collect.Maps;

import java.util.EnumMap;
import java.util.Map;
import java.util.TreeMap;


/**
 * A kryo {@link Serializer} for guava-libraries {@link ImmutableSortedMap}.
 */
public class ImmutableSortedMapSerializer extends Serializer> {

    private static final boolean DOES_NOT_ACCEPT_NULL = true;
    private static final boolean IMMUTABLE = true;

    public ImmutableSortedMapSerializer() {
        super(DOES_NOT_ACCEPT_NULL, IMMUTABLE);
    }

    @Override
    public void write(Kryo kryo, Output output, ImmutableSortedMap immutableMap) {
        kryo.writeObject(output, Maps.newTreeMap(immutableMap));
    }

    @Override
    public ImmutableSortedMap read(Kryo kryo, Input input, Class> type) {
        Map map = kryo.readObject(input, TreeMap.class);
        return ImmutableSortedMap.copyOf(map);
    }

    /**
     * Creates a new {@link ImmutableSortedMapSerializer} and registers its serializer
     * for the several ImmutableMap related classes.
     *
     * @param kryo the {@link Kryo} instance to set the serializer on
     */
    public static void registerSerializers(final Kryo kryo) {

        // we're writing a TreeMap, therefore we should register it
        kryo.register(java.util.TreeMap.class);

        final ImmutableSortedMapSerializer serializer = new ImmutableSortedMapSerializer();

        kryo.register(ImmutableSortedMap.class, serializer);
        kryo.register(ImmutableSortedMap.of().getClass(), serializer);

        final Comparable k1 = new Comparable() {
            @Override
            public int compareTo(Object o) {
                return o == this ? 0 : -1;
            }
        };
        final Comparable k2 = new Comparable() {
            @Override
            public int compareTo(Object o) {
                return o == this ? 0 : 1;
            }
        };
        final Object v1 = new Object();
        final Object v2 = new Object();

        kryo.register(ImmutableSortedMap.of(k1, v1).getClass(), serializer);
        kryo.register(ImmutableSortedMap.of(k1, v1, k2, v2).getClass(), serializer);

        Map enumMap = new EnumMap(DummyEnum.class);
        for (DummyEnum e : DummyEnum.values()) {
            enumMap.put(e, v1);
        }

        kryo.register(ImmutableSortedMap.copyOf(enumMap).getClass(), serializer);
    }

    private enum DummyEnum {
        VALUE1,
        VALUE2
    }
}
    

    

    

            

    

            



    
    






    
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