org.infinispan.marshall.exts.SetExternalizer Maven / Gradle / Ivy

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Infinispan Embedded All-in-One module

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package org.infinispan.marshall.exts;

import net.jcip.annotations.Immutable;

import org.infinispan.commons.io.UnsignedNumeric;
import org.infinispan.commons.marshall.AbstractExternalizer;
import org.infinispan.commons.marshall.MarshallUtil;
import org.infinispan.commons.util.Util;
import org.infinispan.marshall.core.Ids;
import org.jboss.marshalling.util.IdentityIntMap;

import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.Comparator;
import java.util.HashSet;
import java.util.Set;
import java.util.TreeSet;

/**
 * Set externalizer for all set implementations, i.e. HashSet and TreeSet
 *
 * @author Galder Zamarreño
 * @since 4.0
 */
@Immutable
public class SetExternalizer extends AbstractExternalizer {
   private static final int HASH_SET = 0;
   private static final int TREE_SET = 1;
   private final IdentityIntMap> numbers = new IdentityIntMap>(2);

   public SetExternalizer() {
      numbers.put(HashSet.class, HASH_SET);
      numbers.put(TreeSet.class, TREE_SET);
   }

   @Override
   public void writeObject(ObjectOutput output, Set set) throws IOException {
      int number = numbers.get(set.getClass(), -1);
      output.writeByte(number);
      if (number == TREE_SET)
         output.writeObject(((TreeSet) set).comparator());

      MarshallUtil.marshallCollection(set, output);
   }

   @Override
   public Set readObject(ObjectInput input) throws IOException, ClassNotFoundException {
      int magicNumber = input.readUnsignedByte();
      Set